Version 2.0.3

More files from errant merge
Merge remote-tracking branch 'upstream/bugfix-2.0.x' into version_203
2020-01-30 19:08:05 -06:00 · 2020-01-30 19:08:01 -06:00 · 2020-01-30 19:07:46 -06:00 · 2020-01-29 23:19:24 -06:00 · 2020-01-29 23:19:24 -06:00 · 2020-01-27 15:41:50 -06:00
2880 changed files with 104806 additions and 371846 deletions
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,19 +0,0 @@
-# editorconfig.org
-root = true
-
-[{*.patch,syntax_test_*}]
-trim_trailing_whitespace = false
-
-[{*.c,*.cpp,*.h,*.ino}]
-charset = utf-8
-
-[{*.c,*.cpp,*.h,*.ino,Makefile}]
-trim_trailing_whitespace = true
-insert_final_newline = true
-end_of_line = lf
-indent_style = space
-indent_size = 2
-
-[{*.py,*.conf,*.sublime-project}]
-indent_style = tab
-indent_size = 4
--- a/.gitattributes
+++ b/.gitattributes
@@ -17,5 +17,3 @@
 *.png binary
 *.jpg binary
 *.fon binary
-*.bin binary
-*.woff binary
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@@ -1,3 +1,3 @@
 github: [thinkyhead]
 patreon: thinkyhead
-custom: ["https://www.thinkyhead.com/donate-to-marlin"]
+custom: ["http://www.thinkyhead.com/donate-to-marlin"]
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,43 @@
+---
+name: Bug report
+about: Report a bug in Marlin
+title: "[BUG] (short description)"
+labels: ''
+assignees: ''
+
+---
+
+<!--
+
+Have you read Marlin's Code of Conduct? By filing an Issue, you are expected to comply with it, including treating everyone with respect: https://github.com/MarlinFirmware/Marlin/blob/master/.github/code_of_conduct.md
+
+Do you want to ask a question? Are you looking for support? Please don't post here. Instead please use one of the support links at https://github.com/MarlinFirmware/Marlin/issues/new/choose
+
+Before filing an issue be sure to test the "bugfix" branches to see whether the issue has been resolved.
+
+-->
+
+### Bug Description
+
+<!-- Description of the bug -->
+
+### My Configurations
+
+**Required:** Please include a ZIP file containing your `Configuration.h` and `Configuration_adv.h` files.
+
+### Steps to Reproduce
+
+<!-- Please describe the steps needed to reproduce the issue -->
+
+1. [First Step]
+2. [Second Step]
+3. [and so on...]
+
+**Expected behavior:** [What you expect to happen]
+
+**Actual behavior:** [What actually happens]
+
+#### Additional Information
+
+* Provide pictures or links to videos that clearly demonstrate the issue.
+* See [How Can I Contribute](#how-can-i-contribute) for additional guidelines.
--- a/.github/ISSUE_TEMPLATE/config.yml
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,17 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Marlin Documentation
+    url: http://marlinfw.org/
+    about: Lots of documentation on installing and using Marlin.
+  - name: MarlinFirmware Facebook group
+    url: https://www.facebook.com/groups/1049718498464482
+    about: Please ask and answer questions here.
+  - name: Marlin on Discord
+    url: https://discord.gg/n5NJ59y
+    about: Join the Discord server for support and discussion.
+  - name: Marlin Discussion Forum
+    url: http://forums.reprap.org/list.php?415
+    about: A searchable web forum hosted by RepRap dot org.
+  - name: Marlin Videos on YouTube
+    url: https://www.youtube.com/results?search_query=marlin+firmware
+    about: Tutorials and more from Marlin users all around the world. Great for new users!
--- a/.github/ISSUE_TEMPLATE/feature_request.md
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,35 @@
+---
+name: Feature request
+about: Request a Feature
+title: "[FR] (feature request title)"
+labels: ''
+assignees: ''
+
+---
+
+<!--
+
+Have you read Marlin's Code of Conduct? By filing an Issue, you are expected to comply with it, including treating everyone with respect: https://github.com/MarlinFirmware/Marlin/blob/master/.github/code_of_conduct.md
+
+Do you want to ask a question? Are you looking for support? Please don't post here. Instead please use one of the support links at https://github.com/MarlinFirmware/Marlin/issues/new/choose
+
+Before filing an issue be sure to test the "bugfix" branches to see whether the issue has been resolved.
+
+-->
+
+### Description
+
+<!-- Description of the requested feature -->
+
+### Feature Workflow
+
+<!-- Please describe the feature's behavior, user interaction, etc. -->
+
+1. [First Action]
+2. [Second Action]
+3. [and so on...]
+
+#### Additional Information
+
+* Provide pictures or links that demonstrate a similar feature or concept.
+* See [How Can I Contribute](#how-can-i-contribute) for additional guidelines.
--- a/.github/contributing.md
+++ b/.github/contributing.md
@@ -34,15 +34,16 @@ This project and everyone participating in it is governed by the [Marlin Code of

 We have a Message Board and a Facebook group where our knowledgable user community can provide helpful advice if you have questions.

-* [Marlin RepRap forum](https://reprap.org/forum/list.php?415)
+* [Marlin RepRap forum](http://forums.reprap.org/list.php?415)
 * [MarlinFirmware on Facebook](https://www.facebook.com/groups/1049718498464482/)

-If chat is more your speed, you can join the MarlinFirmware Discord server:
+If chat is more your speed, you can join the MarlinFirmware Slack team:

-* Use the link https://discord.gg/n5NJ59y to join up as a General User.
-* Even though our Discord is pretty active, it may take a while for community members to respond &mdash; please be patient!
-* Use the `#general` channel for general questions or discussion about Marlin.
-* Other channels exist for certain topics or are limited to Patrons. Check the channel list.
+* Join the Marlin Slack Team
+  * To obtain group access, please [send a request](http://www.thinkyhead.com/contact/9) to @thinkyhead.
+  * Even though Slack is a chat service, sometimes it takes several hours for community members to respond &mdash; please be patient!
+  * Use the `#general` channel for general questions or discussion about Marlin.
+  * Other channels exist for certain topics. Check the channel list.

 ## How Can I Contribute?

@@ -50,13 +51,13 @@ If chat is more your speed, you can join the MarlinFirmware Discord server:

 This section guides you through submitting a Bug Report for Marlin. Following these guidelines helps maintainers and the community understand your report, reproduce the behavior, and find related reports.

-Before creating a Bug Report, please test the "nightly" development branch, as you might find out that you don't need to create one. When you are creating a Bug Report, please [include as many details as possible](#how-do-i-submit-a-good-bug-report). Fill out [the required template](ISSUE_TEMPLATE/bug_report.yml), the information it asks for helps us resolve issues faster.
+Before creating a Bug Report, please test the "nightly" development branch, as you might find out that you don't need to create one. When you are creating a Bug Report, please [include as many details as possible](#how-do-i-submit-a-good-bug-report). Fill out [the required template](issue_template.md), the information it asks for helps us resolve issues faster.

 > **Note:** Regressions can happen. If you find a **Closed** issue that seems like your issue, go ahead and open a new issue and include a link to the original issue in the body of your new one. All you need to create a link is the issue number, preceded by #. For example, #8888.

 #### How Do I Submit A (Good) Bug Report?

-Bugs are tracked as [GitHub issues](https://guides.github.com/features/issues/). Use the New Issue button to create an issue and provide the following information by filling in [the template](ISSUE_TEMPLATE/bug_report.yml).
+Bugs are tracked as [GitHub issues](https://guides.github.com/features/issues/). Use the New Issue button to create an issue and provide the following information by filling in [the template](issue_template.md).

 Explain the problem and include additional details to help maintainers reproduce the problem:

@@ -88,12 +89,12 @@ Include details about your configuration and environment:

 This section guides you through submitting a suggestion for Marlin, including completely new features and minor improvements to existing functionality. Following these guidelines helps maintainers and the community understand your suggestion and find related suggestions.

-Before creating a suggestion, please check [this list](https://github.com/MarlinFirmware/Marlin/issues?q=is%3Aopen+is%3Aissue+label%3A%22T%3A+Feature+Request%22) as you might find out that you don't need to create one. When you are creating an enhancement suggestion, please [include as many details as possible](#how-do-i-submit-a-good-feature-request). Fill in [the template](ISSUE_TEMPLATE/feature_request.yml), including the steps that you imagine you would take if the feature you're requesting existed.
+Before creating a suggestion, please check [this list](#before-submitting-a-suggestion) as you might find out that you don't need to create one. When you are creating an enhancement suggestion, please [include as many details as possible](#how-do-i-submit-a-good-enhancement-suggestion). Fill in [the template](issue_template.md), including the steps that you imagine you would take if the feature you're requesting existed.

 #### Before Submitting a Feature Request

-* **Check the [Marlin website](https://marlinfw.org/)** for tips — you might discover that the feature is already included. Most importantly, check if you're using [the latest version of Marlin](https://github.com/MarlinFirmware/Marlin/releases) and if you can get the desired behavior by changing [Marlin's config settings](https://marlinfw.org/docs/configuration/configuration.html).
-* **Perform a [cursory search](https://github.com/MarlinFirmware/Marlin/issues?q=is%3Aopen+is%3Aissue+label%3A%22T%3A+Feature+Request%22)** to see if the enhancement has already been suggested. If it has, add a comment to the existing issue instead of opening a new one.
+* **Check the [Marlin website](http://marlinfw.org/)** for tips — you might discover that the feature is already included. Most importantly, check if you're using [the latest version of Marlin](https://github.com/MarlinFirmware/Marlin/releases) and if you can get the desired behavior by changing [Marlin's config settings](http://marlinfw.org/docs/configuration/configuration.html).
+* **Perform a [cursory search](https://github.com/MarlinFirmware/Marlin/issues?q=is%3Aissue)** to see if the enhancement has already been suggested. If it has, add a comment to the existing issue instead of opening a new one.

 #### How Do I Submit A (Good) Feature Request?

@@ -116,12 +117,12 @@ Unsure where to begin contributing to Marlin? You can start by looking through t

 ### Pull Requests

-Pull Requests should always be targeted to working branches (e.g., `bugfix-2.0.x` and/or `bugfix-1.1.x`) and never to release branches (e.g., `2.0.x` and/or `1.1.x`). If this is your first Pull Request, please read our [Guide to Pull Requests](https://marlinfw.org/docs/development/getting_started_pull_requests.html) and Github's [Pull Request](https://help.github.com/articles/creating-a-pull-request/) documentation.
+Pull Requests should always be targeted to working branches (e.g., `bugfix-1.1.x` and/or `bugfix-2.0.x`) and never to release branches (e.g., `1.1.x`). If this is your first Pull Request, please read our [Guide to Pull Requests](http://marlinfw.org/docs/development/getting_started_pull_requests.html) and Github's [Pull Request](https://help.github.com/articles/creating-a-pull-request/) documentation.

 * Fill in [the required template](pull_request_template.md).
 * Don't include issue numbers in the PR title.
 * Include pictures, diagrams, and links to videos in your Pull Request to demonstrate your changes, if needed.
-* Follow the [Coding Standards](https://marlinfw.org/docs/development/coding_standards.html) posted on our website.
+* Follow the [Coding Standards](http://marlinfw.org/docs/development/coding_standards.html) posted on our website.
 * Document new code with clear and concise comments.
 * End all files with a newline.

@@ -136,7 +137,7 @@ Pull Requests should always be targeted to working branches (e.g., `bugfix-2.0.x

 ### C++ Coding Standards

-* Please read and follow the [Coding Standards](https://marlinfw.org/docs/development/coding_standards.html) posted on our website. Failure to follow these guidelines will delay evaluation and acceptance of Pull Requests.
+* Please read and follow the [Coding Standards](http://marlinfw.org/docs/development/coding_standards.html) posted on our website. Failure to follow these guidelines will delay evaluation and acceptance of Pull Requests.

 ### Documentation

--- a/.github/issue_template.md
+++ b/.github/issue_template.md
@@ -0,0 +1,31 @@
+<!--
+
+Have you read Marlin's Code of Conduct? By filing an Issue, you are expected to comply with it, including treating everyone with respect: https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.0.x/.github/code_of_conduct.md
+
+Do you want to ask a question? Are you looking for support? Please don't post here. Instead please use the Marlin Firmware forum at http://forums.reprap.org/list.php?415 or the Marlin Facebook Group https://www.facebook.com/groups/1049718498464482/ or the Marlin Discord Server https://discord.gg/n5NJ59y.
+
+Before filing an issue be sure to test the 1.1 and/or 2.0 "bugfix" branches to see whether the issue is already addressed.
+
+-->
+
+### Description
+
+<!-- Description of the bug or requested feature -->
+
+### Steps to Reproduce
+
+<!-- If this is a Bug Report, please describe the steps needed to reproduce the issue -->
+
+1. [First Step]
+2. [Second Step]
+3. [and so on...]
+
+**Expected behavior:** [What you expect to happen]
+
+**Actual behavior:** [What actually happens]
+
+#### Additional Information
+
+* Include a ZIP file containing your `Configuration.h` and `Configuration_adv.h` files.
+* Provide pictures or links to videos that clearly demonstrate the issue.
+* See [How Can I Contribute](#how-can-i-contribute) for additional guidelines.
--- a/.github/labeler.yml
+++ b/.github/labeler.yml
@@ -0,0 +1,18 @@
+# Add '@domain/core' label to any change within the 'core' package
+enhancement:
+  - .github
+
+# Add 'test' label to any change to *.spec.js files within the source dir
+"C: Motion":
+  - src/module/motion.*
+  - src/module/planner.*
+  - src/module/stepper.*
+
+"C: G-code Parser":
+  - src/gcode/**
+
+"PR: Configurations":
+  - config/examples/**
+
+"T: 32-Bit & HAL":
+  - src/HAL/**
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -1,33 +1,19 @@
-<!--
+### Requirements

-Submitting a Pull Request
-
- Please fill out all sections of this form. You can delete the helpful comments.
- Pull Requests without clear information will take longer and may even be rejected.
- We get a high volume of submissions so please be patient during review.
-
-->
+* Filling out this template is required. Pull Requests without a clear description may be closed at the maintainers' discretion.

 ### Description

 <!--

-Clearly describe the submitted changes with lots of details. Include images where helpful. Initial reviewers may not be familiar with the subject, so be as thorough as possible. You can use MarkDown syntax to improve readability with bullet lists, code blocks, and so on. PREVIEW and fix up formatting before submitting.
+We must be able to understand your proposed change from this description. If we can't understand what the code will do from this description, the Pull Request may be closed at the maintainers' discretion. Keep in mind that the maintainer reviewing this PR may not be familiar with or have worked with the code recently, so please walk us through the concepts.

 -->

-### Requirements
-
-<!-- Does this PR require a specific board, LCD, etc.? -->
-
 ### Benefits

-<!-- What does this PR fix or improve? -->
-
-### Configurations
-
-<!-- Attach Configurations ZIP and any other files needed to test this PR. -->
+<!-- What does this fix or improve? -->

 ### Related Issues

-<!-- Does this PR fix a bug or fulfill a Feature Request? Link related Issues here. -->
+<!-- Whether this fixes a bug or fulfills a feature request, please list any related Issues here. -->
--- a/.github/workflows/bump-date.yml
+++ b/.github/workflows/bump-date.yml
@@ -0,0 +1,34 @@
+#
+# bump-date.yml
+# Bump the distribution date once per day
+#
+
+name: Bump Distribution Date
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  bump_date:
+
+    runs-on: ubuntu-latest
+
+    steps:
+
+    - name: Check out bugfix-2.0.x
+      uses: actions/checkout@v2
+      with:
+        ref: bugfix-2.0.x
+
+    - name: Bump Distribution Date
+      run: |
+        # Inline Bump Script
+        [[ "$GITHUB_REPOSITORY" == "MarlinFirmware/Marlin" ]] || exit 0
+        DIST=$( date +"%Y-%m-%d" )
+        eval "sed -E -i 's/(#define +STRING_DISTRIBUTION_DATE) .*$/\1 \"$DIST\"/g' Marlin/src/inc/Version.h" && \
+        git config user.name "${GITHUB_ACTOR}" && \
+        git config user.email "${GITHUB_ACTOR}@users.noreply.github.com" && \
+        git add . && \
+        git commit -m "[cron] Bump distribution date ($DIST)" && \
+        git push
--- a/.github/workflows/check-pr.yml
+++ b/.github/workflows/check-pr.yml
@@ -0,0 +1,31 @@
+#
+# check-pr.yml
+# Add a comment to the PR if it's directed to a release branch
+#
+
+name: Check PR
+
+on:
+  pull_request:
+    branches:
+    - 1.0.x
+    - 1.1.x
+    - 2.0.x
+
+jobs:
+  check_pr:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Comment on PR
+      uses: unsplash/comment-on-pr@master
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        msg: "<p>Thanks for your contribution! \
+              Unfortunately we can't accept PRs directed at release branches. \
+              We make patches to the bugfix branches and only later do we push them out as releases. \
+              Please redo this PR starting with the `bugfix-2.0.x` branch and be careful to target `bugfix-2.0.x` when resubmitting the PR.</p> \
+              <p>It may help to set your fork's default branch to `bugfix-2.0.x`.</p> \
+              <p>See <a href='http://marlinfw.org/docs/development/getting_started_pull_requests.html' target='_blank'>this page</a> for full instructions.</p>"
--- a/.github/workflows/label-pr.yml
+++ b/.github/workflows/label-pr.yml
@@ -0,0 +1,23 @@
+#
+# label-pr.yml
+# Automatically close the PR if it's directed to a release branch
+#
+
+name: Apply Labels
+
+on:
+  pull_request:
+    branches:
+    - bugfix-1.1.x
+    - bugfix-2.0.x
+    - dev-2.1.x
+
+jobs:
+  apply_labels:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/labeler@v2
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"
--- a/.github/workflows/test-builds.yml
+++ b/.github/workflows/test-builds.yml
@@ -0,0 +1,103 @@
+#
+# test-builds.yml
+# Do test builds to catch compile errors
+#
+
+name: CI
+
+on:
+  pull_request:
+    branches:
+    - bugfix-2.0.x
+    - dev-2.1.x
+    paths-ignore:
+    - config/**
+    - data/**
+    - docs/**
+    - '**/*.md'
+
+jobs:
+  test_builds:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        test-platform:
+        # Base Environments
+
+        - DUE
+        - esp32
+        - linux_native
+        - megaatmega2560
+        - teensy31
+        - teensy35
+
+        # Extended AVR Environments
+
+        - FYSETC_F6_13
+        - megaatmega1280
+        - rambo
+        - sanguino_atmega1284p
+        - sanguino_atmega644p
+
+        # Extended STM32 Environments
+
+        - STM32F103RC_bigtree
+        - STM32F103RC_bigtree_USB
+        - STM32F103RE_bigtree
+        - STM32F103RE_bigtree_USB
+        - STM32F103RC_fysetc
+        - jgaurora_a5s_a1
+        - STM32F103VE_longer
+        - STM32F407VE_black
+        - BIGTREE_SKR_PRO
+        - mks_robin
+        - ARMED
+        - FYSETC_S6
+
+        # Put lengthy tests last
+
+        - LPC1768
+        - LPC1769
+
+        # STM32 with non-STM framework. both broken for now. they should use HAL_STM32 which is working.
+
+        #- STM32F4
+        #- STM32F7
+
+        # Non-working environment tests
+
+        #- BIGTREE_BTT002
+        #- at90usb1286_cdc
+        #- at90usb1286_dfu
+        #- STM32F103CB_malyan
+        #- mks_robin_lite
+        #- mks_robin_mini
+        #- mks_robin_nano
+        #- SAMD51_grandcentral_m4
+
+    steps:
+
+    - name: Select Python 3.7
+      uses: actions/setup-python@v1
+      with:
+        python-version: '3.7' # Version range or exact version of a Python version to use, using semvers version range syntax.
+        architecture: 'x64' # optional x64 or x86. Defaults to x64 if not specified
+
+    - name: Install PlatformIO
+      run: |
+        pip install -U https://github.com/platformio/platformio-core/archive/master.zip
+        platformio update
+
+    - name: Check out the PR
+      uses: actions/checkout@v2
+
+    - name: Run ${{ matrix.test-platform }} Tests
+      run: |
+        # Inline tests script
+        [[ "$GITHUB_REPOSITORY" == "MarlinFirmware/Marlin" ]] || exit 0
+        chmod +x buildroot/bin/*
+        chmod +x buildroot/share/tests/*
+        export PATH=./buildroot/bin/:./buildroot/share/tests/:${PATH}
+        run_tests . ${{ matrix.test-platform }}
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
 #
 # Marlin 3D Printer Firmware
-# Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+# Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 #
 # Based on Sprinter and grbl.
 # Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,22 +16,18 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #

-# Generated files
+# Our automatic versioning scheme generates the following file
+# NEVER put it in the repository
 _Version.h
-bdf2u8g
-marlin_config.json
-mczip.h
-*.gen
-*.sublime-workspace

 #
 # OS
 #
 applet/
-.DS_Store
+*.DS_Store

 #
 # Misc
@@ -41,6 +37,7 @@ applet/
 *.rej
 *.bak
 *.idea
+*.s
 *.i
 *.ii
 *.swp
@@ -80,6 +77,7 @@ tags
 *.out
 *.app

+
 #
 # C
 #
@@ -125,10 +123,30 @@ tags
 .gcc-flags.json
 /lib/

-# Secure Credentials
-Configuration_Secure.h
+# Workaround for Deviot+platformio quirks
+Marlin/lib
+Marlin/platformio.ini
+Marlin/*/platformio.ini
+Marlin/*/*/platformio.ini
+Marlin/*/*/*/platformio.ini
+Marlin/*/*/*/*/platformio.ini
+Marlin/.travis.yml
+Marlin/*/.travis.yml
+Marlin/*/*/.travis.yml
+Marlin/*/*/*/.travis.yml
+Marlin/*/*/*/*/.travis.yml
+Marlin/.gitignore
+Marlin/*/.gitignore
+Marlin/*/*/.gitignore
+Marlin/*/*/*/.gitignore
+Marlin/*/*/*/*/.gitignore
+Marlin/readme.txt
+Marlin/*/readme.txt
+Marlin/*/*/readme.txt
+Marlin/*/*/*/readme.txt
+Marlin/*/*/*/*/readme.txt

-# Visual Studio
+#Visual Studio
 *.sln
 *.vcxproj
 *.vcxproj.user
@@ -139,33 +157,27 @@ __vm/
 .vs/
 vc-fileutils.settings

-# Visual Studio Code
-.vscode/*
-!.vscode/extensions.json
-
-#Simulation
-imgui.ini
-eeprom.dat
-spi_flash.bin
+#Visual Studio Code
+.vscode
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/*.db

 #cmake
 CMakeLists.txt
 src/CMakeLists.txt
 CMakeListsPrivate.txt
-build/

-# CLion
+#CLion
 cmake-build-*

-# Eclipse
+#Eclipse
 .project
 .cproject
 .pydevproject
 .settings
 .classpath

-# Python
+#Python
 __pycache__
-
-# IOLogger logs
-*_log.csv
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -1,11 +0,0 @@
-{
-    // See http://go.microsoft.com/fwlink/?LinkId=827846
-    // for the documentation about the extensions.json format
-    "recommendations": [
-        "marlinfirmware.auto-build",
-        "platformio.platformio-ide"
-    ],
-    "unwantedRecommendations": [
-        "ms-vscode.cpptools-extension-pack"
-    ]
-}
--- a/9
+++ b/9
@@ -3,7 +3,7 @@
                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

- Copyright (c) 2007 Free Software Foundation, Inc. <https://www.fsf.org/>
+ Copyright (c) 2007 Free Software Foundation, Inc. <http://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

@@ -647,7 +647,7 @@ the "copyright" line and a pointer to where the full notice is found.
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.

 Also add information on how to contact you by electronic and paper mail.

@@ -666,11 +666,12 @@ might be different; for a GUI interface, you would use an "about box".
  You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
+<http://www.gnu.org/licenses/>.

  The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+
--- a/52
+++ b/52
@@ -1,52 +0,0 @@
-help:
-	@echo "Tasks for local development:"
-	@echo "* tests-single-ci:             Run a single test from inside the CI"
-	@echo "* tests-single-local:          Run a single test locally"
-	@echo "* tests-single-local-docker:   Run a single test locally, using docker-compose"
-	@echo "* tests-all-local:             Run all tests locally"
-	@echo "* tests-all-local-docker:      Run all tests locally, using docker-compose"
-	@echo "* setup-local-docker:          Setup local docker-compose"
-	@echo ""
-	@echo "Options for testing:"
-	@echo "  TEST_TARGET          Set when running tests-single-*, to select the"
-	@echo "                       test. If you set it to ALL it will run all "
-	@echo "                       tests, but some of them are broken: use "
-	@echo "                       tests-all-* instead to run only the ones that "
-	@echo "                       run on GitHub CI"
-	@echo "  ONLY_TEST            Limit tests to only those that contain this, or"
-	@echo "                       the index of the test (1-based)"
-	@echo "  VERBOSE_PLATFORMIO   If you want the full PIO output, set any value"
-	@echo "  GIT_RESET_HARD       Used by CI: reset all local changes. WARNING:"
-	@echo "                       THIS WILL UNDO ANY CHANGES YOU'VE MADE!"
-.PHONY: help
-
-tests-single-ci:
-	export GIT_RESET_HARD=true
-	$(MAKE) tests-single-local TEST_TARGET=$(TEST_TARGET)
-.PHONY: tests-single-ci
-
-tests-single-local:
-	@if ! test -n "$(TEST_TARGET)" ; then echo "***ERROR*** Set TEST_TARGET=<your-module> or use make tests-all-local" ; return 1; fi
-	export PATH=./buildroot/bin/:./buildroot/tests/:${PATH} \
-	  && export VERBOSE_PLATFORMIO=$(VERBOSE_PLATFORMIO) \
-	  && run_tests . $(TEST_TARGET) "$(ONLY_TEST)"
-.PHONY: tests-single-local
-
-tests-single-local-docker:
-	@if ! test -n "$(TEST_TARGET)" ; then echo "***ERROR*** Set TEST_TARGET=<your-module> or use make tests-all-local-docker" ; return 1; fi
-	docker-compose run --rm marlin $(MAKE) tests-single-local TEST_TARGET=$(TEST_TARGET) VERBOSE_PLATFORMIO=$(VERBOSE_PLATFORMIO) GIT_RESET_HARD=$(GIT_RESET_HARD) ONLY_TEST="$(ONLY_TEST)"
-.PHONY: tests-single-local-docker
-
-tests-all-local:
-	export PATH=./buildroot/bin/:./buildroot/tests/:${PATH} \
-	  && export VERBOSE_PLATFORMIO=$(VERBOSE_PLATFORMIO) \
-	  && for TEST_TARGET in $$(./get_test_targets.py) ; do echo "Running tests for $$TEST_TARGET" ; run_tests . $$TEST_TARGET ; done
-.PHONY: tests-all-local
-
-tests-all-local-docker:
-	docker-compose run --rm marlin $(MAKE) tests-all-local VERBOSE_PLATFORMIO=$(VERBOSE_PLATFORMIO) GIT_RESET_HARD=$(GIT_RESET_HARD)
-.PHONY: tests-all-local-docker
-
-setup-local-docker:
-	docker-compose build
-.PHONY: setup-local-docker
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
--- a/Marlin/Makefile
+++ b/Marlin/Makefile
@@ -14,7 +14,7 @@
 # Detailed instructions for using the makefile:
 #
 #  1. Modify the line containing "ARDUINO_INSTALL_DIR" to point to the directory that
-#     contains the Arduino installation (for example, under macOS, this
+#     contains the Arduino installation (for example, under Mac OS X, this
 #     might be /Applications/Arduino.app/Contents/Resources/Java).
 #
 #  2. Modify the line containing "UPLOAD_PORT" to refer to the filename
@@ -22,10 +22,8 @@
 #     (e.g. UPLOAD_PORT = /dev/tty.USB0).  If the exact name of this file
 #     changes, you can use * as a wild card (e.g. UPLOAD_PORT = /dev/tty.usb*).
 #
-#  3. Set the line containing "MCU" to match your board's processor. Set
-#     "PROG_MCU" as the AVR part name corresponding to "MCU". You can use the
-#     following command to get a list of correspondences: `avrdude -c alf -p x`
-#     Older boards are atmega8 based, newer ones like Arduino Mini, Bluetooth
+#  3. Set the line containing "MCU" to match your board's processor.
+#     Older one's are atmega8 based, newer ones like Arduino Mini, Bluetooth
 #     or Diecimila have the atmega168.  If you're using a LilyPad Arduino,
 #     change F_CPU to 8000000. If you are using Gen7 electronics, you
 #     probably need to use 20000000. Either way, you must regenerate
@@ -36,18 +34,18 @@
 #  5. Type "make upload", reset your Arduino board, and press enter to
 #     upload your program to the Arduino board.
 #
-# Note that all settings at the top of this file can be overridden from
+# Note that all settings at the top of this file can be overriden from
 # the command line with, for example, "make HARDWARE_MOTHERBOARD=71"
 #
 # To compile for RAMPS (atmega2560) with Arduino 1.6.9 at root/arduino you would use...
 #
 #   make ARDUINO_VERSION=10609 AVR_TOOLS_PATH=/root/arduino/hardware/tools/avr/bin/ \
-#   HARDWARE_MOTHERBOARD=1200 ARDUINO_INSTALL_DIR=/root/arduino
+#   HARDWARE_MOTHERBOARD=33 ARDUINO_INSTALL_DIR=/root/arduino
 #
 # To compile and upload simply add "upload" to the end of the line...
 #
 #   make ARDUINO_VERSION=10609 AVR_TOOLS_PATH=/root/arduino/hardware/tools/avr/bin/ \
-#   HARDWARE_MOTHERBOARD=1200 ARDUINO_INSTALL_DIR=/root/arduino upload
+#   HARDWARE_MOTHERBOARD=33 ARDUINO_INSTALL_DIR=/root/arduino upload
 #
 # If uploading doesn't work try adding the parameter "AVRDUDE_PROGRAMMER=wiring" or
 # start upload manually (using stk500) like so:
@@ -59,26 +57,7 @@
 #

 # This defines the board to compile for (see boards.h for your board's ID)
-HARDWARE_MOTHERBOARD ?= 1020
-
-ifeq ($(OS),Windows_NT)
-  # Windows
-  ARDUINO_INSTALL_DIR ?= ${HOME}/Arduino
-  ARDUINO_USER_DIR ?= ${HOME}/Arduino
-else
-  UNAME_S := $(shell uname -s)
-  ifeq ($(UNAME_S),Linux)
-    # Linux
-    ARDUINO_INSTALL_DIR ?= /usr/share/arduino
-    ARDUINO_USER_DIR ?= ${HOME}/Arduino
-  endif
-  ifeq ($(UNAME_S),Darwin)
-    # Darwin (macOS)
-    ARDUINO_INSTALL_DIR ?= /Applications/Arduino.app/Contents/Java
-    ARDUINO_USER_DIR ?= ${HOME}/Documents/Arduino
-    AVR_TOOLS_PATH ?= /Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/
-  endif
-endif
+HARDWARE_MOTHERBOARD ?= 11

 # Arduino source install directory, and version number
 # On most linuxes this will be /usr/share/arduino
@@ -88,51 +67,45 @@ ARDUINO_VERSION      ?= 106
 # The installed Libraries are in the User folder
 ARDUINO_USER_DIR ?= ${HOME}/Arduino

-# You can optionally set a path to the avr-gcc tools.
-# Requires a trailing slash. For example, /usr/local/avr-gcc/bin/
+# You can optionally set a path to the avr-gcc tools. Requires a trailing slash. (ex: /usr/local/avr-gcc/bin)
 AVR_TOOLS_PATH ?=

-# Programmer configuration
+#Programmer configuration
 UPLOAD_RATE        ?= 57600
 AVRDUDE_PROGRAMMER ?= arduino
-# On most linuxes this will be /dev/ttyACM0 or /dev/ttyACM1
+# on most linuxes this will be /dev/ttyACM0 or /dev/ttyACM1
 UPLOAD_PORT        ?= /dev/ttyUSB0

-# Directory used to build files in, contains all the build files, from object
-# files to the final hex file on linux it is best to put an absolute path
-# like /home/username/tmp .
+#Directory used to build files in, contains all the build files, from object files to the final hex file
+#on linux it is best to put an absolute path like /home/username/tmp .
 BUILD_DIR          ?= applet

 # This defines whether Liquid_TWI2 support will be built
 LIQUID_TWI2        ?= 0

-# This defines if Wire is needed
+# this defines if Wire is needed
 WIRE               ?= 0

-# This defines if Tone is needed (i.e SPEAKER is defined in Configuration.h)
-# Disabling this (and SPEAKER) saves approximately 350 bytes of memory.
-TONE               ?= 1
+# this defines if U8GLIB is needed (may require RELOC_WORKAROUND)
+U8GLIB             ?= 1

-# This defines if U8GLIB is needed (may require RELOC_WORKAROUND)
-U8GLIB             ?= 0
+# this defines whether to include the Trinamic TMCStepper library
+TMC                ?= 1

-# This defines whether to include the Trinamic TMCStepper library
-TMC                ?= 0
-
-# This defines whether to include the AdaFruit NeoPixel library
+# this defines whether to include the AdaFruit NeoPixel library
 NEOPIXEL           ?= 0

 ############
 # Try to automatically determine whether RELOC_WORKAROUND is needed based
 # on GCC versions:
-#   https://www.avrfreaks.net/comment/1789106#comment-1789106
+#   http://www.avrfreaks.net/comment/1789106#comment-1789106

 CC_MAJ:=$(shell $(CC) -dM -E - < /dev/null | grep __GNUC__ | cut -f3 -d\ )
 CC_MIN:=$(shell $(CC) -dM -E - < /dev/null | grep __GNUC_MINOR__ | cut -f3 -d\ )
 CC_PATCHLEVEL:=$(shell $(CC) -dM -E - < /dev/null | grep __GNUC_PATCHLEVEL__ | cut -f3 -d\ )
 CC_VER:=$(shell echo $$(( $(CC_MAJ) * 10000 + $(CC_MIN) * 100 + $(CC_PATCHLEVEL) )))
 ifeq ($(shell test $(CC_VER) -lt 40901 && echo 1),1)
-  $(warning This GCC version $(CC_VER) is likely broken. Enabling relocation workaround.)
+  @echo This version of GCC is likely broken. Enabling relocation workaround.
  RELOC_WORKAROUND = 1
 endif

@@ -197,243 +170,98 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1100)
 else ifeq ($(HARDWARE_MOTHERBOARD),1101)
 # Velleman K8400 Controller (derived from 3Drag Controller)
 else ifeq ($(HARDWARE_MOTHERBOARD),1102)
-# Velleman K8600 Controller (Vertex Nano)
-else ifeq ($(HARDWARE_MOTHERBOARD),1103)
-# Velleman K8800 Controller (Vertex Delta)
-else ifeq ($(HARDWARE_MOTHERBOARD),1104)
 # 2PrintBeta BAM&DICE with STK drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1105)
-# 2PrintBeta BAM&DICE Due with STK drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1106)
-# MKS BASE v1.0
-else ifeq ($(HARDWARE_MOTHERBOARD),1107)
-# MKS BASE v1.4 with Allegro A4982 stepper drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1108)
-# MKS BASE v1.5 with Allegro A4982 stepper drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1109)
-# MKS BASE v1.6 with Allegro A4982 stepper drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1110)
-# MKS BASE 1.0 with Heroic HR4982 stepper drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1111)
-# MKS GEN v1.3 or 1.4
-else ifeq ($(HARDWARE_MOTHERBOARD),1112)
-# MKS GEN L
-else ifeq ($(HARDWARE_MOTHERBOARD),1113)
-# BigTreeTech or BIQU KFB2.0
-else ifeq ($(HARDWARE_MOTHERBOARD),1114)
-# zrib V2.0 (Chinese RAMPS replica)
-else ifeq ($(HARDWARE_MOTHERBOARD),1115)
-# zrib V5.2 (Chinese RAMPS replica)
-else ifeq ($(HARDWARE_MOTHERBOARD),1116)
-# Felix 2.0+ Electronics Board (RAMPS like)
-else ifeq ($(HARDWARE_MOTHERBOARD),1117)
-# Invent-A-Part RigidBoard
-else ifeq ($(HARDWARE_MOTHERBOARD),1118)
-# Invent-A-Part RigidBoard V2
-else ifeq ($(HARDWARE_MOTHERBOARD),1119)
-# Sainsmart 2-in-1 board
-else ifeq ($(HARDWARE_MOTHERBOARD),1120)
-# Ultimaker
-else ifeq ($(HARDWARE_MOTHERBOARD),1121)
-# Ultimaker (Older electronics. Pre 1.5.4. This is rare)
-else ifeq ($(HARDWARE_MOTHERBOARD),1122)
-  MCU              ?= atmega1280
-  PROG_MCU         ?= m1280
-# Azteeg X3
-else ifeq ($(HARDWARE_MOTHERBOARD),1123)
-# Azteeg X3 Pro
-else ifeq ($(HARDWARE_MOTHERBOARD),1124)
-# Ultimainboard 2.x (Uses TEMP_SENSOR 20)
-else ifeq ($(HARDWARE_MOTHERBOARD),1125)
-# Rumba
-else ifeq ($(HARDWARE_MOTHERBOARD),1126)
-# Raise3D N series Rumba derivative
-else ifeq ($(HARDWARE_MOTHERBOARD),1127)
-# Rapide Lite 200 (v1, low-cost RUMBA clone with drv)
-else ifeq ($(HARDWARE_MOTHERBOARD),1128)
-# Formbot T-Rex 2 Plus
-else ifeq ($(HARDWARE_MOTHERBOARD),1129)
-# Formbot T-Rex 3
-else ifeq ($(HARDWARE_MOTHERBOARD),1130)
-# Formbot Raptor
-else ifeq ($(HARDWARE_MOTHERBOARD),1131)
-# Formbot Raptor 2
-else ifeq ($(HARDWARE_MOTHERBOARD),1132)
-# bq ZUM Mega 3D
-else ifeq ($(HARDWARE_MOTHERBOARD),1133)
-# MakeBoard Mini v2.1.2 by MicroMake
-else ifeq ($(HARDWARE_MOTHERBOARD),1134)
-# TriGorilla Anycubic version 1.3-based on RAMPS EFB
-else ifeq ($(HARDWARE_MOTHERBOARD),1135)
-#   ... Ver 1.4
-else ifeq ($(HARDWARE_MOTHERBOARD),1136)
-#   ... Rev 1.1 (new servo pin order)
-else ifeq ($(HARDWARE_MOTHERBOARD),1137)
-# Creality: Ender-4, CR-8
-else ifeq ($(HARDWARE_MOTHERBOARD),1138)
-# Creality: CR10S, CR20, CR-X
-else ifeq ($(HARDWARE_MOTHERBOARD),1139)
-# Dagoma F5
-else ifeq ($(HARDWARE_MOTHERBOARD),1140)
-# FYSETC F6 1.3
-else ifeq ($(HARDWARE_MOTHERBOARD),1141)
-# FYSETC F6 1.4
-else ifeq ($(HARDWARE_MOTHERBOARD),1142)
-# Wanhao Duplicator i3 Plus
-else ifeq ($(HARDWARE_MOTHERBOARD),1143)
-# VORON Design
-else ifeq ($(HARDWARE_MOTHERBOARD),1144)
-# Tronxy TRONXY-V3-1.0
-else ifeq ($(HARDWARE_MOTHERBOARD),1145)
-# Z-Bolt X Series
-else ifeq ($(HARDWARE_MOTHERBOARD),1146)
-# TT OSCAR
-else ifeq ($(HARDWARE_MOTHERBOARD),1147)
-# Overlord/Overlord Pro
-else ifeq ($(HARDWARE_MOTHERBOARD),1148)
-# ADIMLab Gantry v1
-else ifeq ($(HARDWARE_MOTHERBOARD),1149)
-# ADIMLab Gantry v2
-else ifeq ($(HARDWARE_MOTHERBOARD),1150)
-# BIQU Tango V1
-else ifeq ($(HARDWARE_MOTHERBOARD),1151)
-# MKS GEN L V2
-else ifeq ($(HARDWARE_MOTHERBOARD),1152)
-# MKS GEN L V2.1
-else ifeq ($(HARDWARE_MOTHERBOARD),1153)
-# Copymaster 3D
-else ifeq ($(HARDWARE_MOTHERBOARD),1154)
-# Ortur 4
-else ifeq ($(HARDWARE_MOTHERBOARD),1155)
-# Tenlog D3 Hero IDEX printer
-else ifeq ($(HARDWARE_MOTHERBOARD),1156)
-# Ramps S 1.2 by Sakul.cz (Power outputs: Hotend0, Hotend1, Fan, Bed)
-else ifeq ($(HARDWARE_MOTHERBOARD),1157)
-# Ramps S 1.2 by Sakul.cz (Power outputs: Hotend0, Hotend1, Hotend2, Bed)
-else ifeq ($(HARDWARE_MOTHERBOARD),1158)
-# Ramps S 1.2 by Sakul.cz (Power outputs: Hotend, Fan0, Fan1, Bed)
-else ifeq ($(HARDWARE_MOTHERBOARD),1159)
-# Longer LK1 PRO / Alfawise U20 Pro (PRO version)
-else ifeq ($(HARDWARE_MOTHERBOARD),1160)
-# Longer LKx PRO / Alfawise Uxx Pro (PRO version)
-else ifeq ($(HARDWARE_MOTHERBOARD),1161)
-
-
-# 3Drag Controller
-else ifeq ($(HARDWARE_MOTHERBOARD),1100)
-# Velleman K8200 Controller (derived from 3Drag Controller)
-else ifeq ($(HARDWARE_MOTHERBOARD),1101)
-# Velleman K8400 Controller (derived from 3Drag Controller)
-else ifeq ($(HARDWARE_MOTHERBOARD),1102)
-# Velleman K8600 Controller (Vertex Nano)
 else ifeq ($(HARDWARE_MOTHERBOARD),1103)
-# Velleman K8800 Controller (Vertex Delta)
-else ifeq ($(HARDWARE_MOTHERBOARD),1104)
-# 2PrintBeta BAM&DICE with STK drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1105)
 # 2PrintBeta BAM&DICE Due with STK drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1106)
+else ifeq ($(HARDWARE_MOTHERBOARD),1104)
 # MKS BASE v1.0
-else ifeq ($(HARDWARE_MOTHERBOARD),1107)
+else ifeq ($(HARDWARE_MOTHERBOARD),1105)
 # MKS v1.4 with A4982 stepper drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1108)
+else ifeq ($(HARDWARE_MOTHERBOARD),1106)
 # MKS v1.5 with Allegro A4982 stepper drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1109)
-# MKS v1.6 with Allegro A4982 stepper drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1110)
+else ifeq ($(HARDWARE_MOTHERBOARD),1107)
 # MKS BASE 1.0 with Heroic HR4982 stepper drivers
-else ifeq ($(HARDWARE_MOTHERBOARD),1111)
+else ifeq ($(HARDWARE_MOTHERBOARD),1108)
 # MKS GEN v1.3 or 1.4
-else ifeq ($(HARDWARE_MOTHERBOARD),1112)
+else ifeq ($(HARDWARE_MOTHERBOARD),1109)
 # MKS GEN L
-else ifeq ($(HARDWARE_MOTHERBOARD),1113)
-# zrib V2.0 control board (Chinese RAMPS replica)
-else ifeq ($(HARDWARE_MOTHERBOARD),1114)
+else ifeq ($(HARDWARE_MOTHERBOARD),1110)
+# zrib V2.0 control board (Chinese knock off RAMPS replica)
+else ifeq ($(HARDWARE_MOTHERBOARD),1111)
 # BigTreeTech or BIQU KFB2.0
-else ifeq ($(HARDWARE_MOTHERBOARD),1115)
+else ifeq ($(HARDWARE_MOTHERBOARD),1112)
 # Felix 2.0+ Electronics Board (RAMPS like)
-else ifeq ($(HARDWARE_MOTHERBOARD),1116)
+else ifeq ($(HARDWARE_MOTHERBOARD),1113)
 # Invent-A-Part RigidBoard
-else ifeq ($(HARDWARE_MOTHERBOARD),1117)
+else ifeq ($(HARDWARE_MOTHERBOARD),1114)
 # Invent-A-Part RigidBoard V2
-else ifeq ($(HARDWARE_MOTHERBOARD),1118)
+else ifeq ($(HARDWARE_MOTHERBOARD),1115)
 # Sainsmart 2-in-1 board
-else ifeq ($(HARDWARE_MOTHERBOARD),1119)
+else ifeq ($(HARDWARE_MOTHERBOARD),1116)
 # Ultimaker
-else ifeq ($(HARDWARE_MOTHERBOARD),1120)
+else ifeq ($(HARDWARE_MOTHERBOARD),1117)
 # Ultimaker (Older electronics. Pre 1.5.4. This is rare)
-else ifeq ($(HARDWARE_MOTHERBOARD),1121)
-  MCU              ?= atmega1280
-  PROG_MCU         ?= m1280
+else ifeq ($(HARDWARE_MOTHERBOARD),1118)
+  MCU ?= atmega1280

 # Azteeg X3
-else ifeq ($(HARDWARE_MOTHERBOARD),1122)
+else ifeq ($(HARDWARE_MOTHERBOARD),1119)
 # Azteeg X3 Pro
-else ifeq ($(HARDWARE_MOTHERBOARD),1123)
+else ifeq ($(HARDWARE_MOTHERBOARD),1120)
 # Ultimainboard 2.x (Uses TEMP_SENSOR 20)
-else ifeq ($(HARDWARE_MOTHERBOARD),1124)
+else ifeq ($(HARDWARE_MOTHERBOARD),1121)
 # Rumba
-else ifeq ($(HARDWARE_MOTHERBOARD),1125)
+else ifeq ($(HARDWARE_MOTHERBOARD),1122)
 # Raise3D Rumba
-else ifeq ($(HARDWARE_MOTHERBOARD),1126)
+else ifeq ($(HARDWARE_MOTHERBOARD),1123)
 # Rapide Lite RL200 Rumba
-else ifeq ($(HARDWARE_MOTHERBOARD),1127)
+else ifeq ($(HARDWARE_MOTHERBOARD),1124)
 # Formbot T-Rex 2 Plus
-else ifeq ($(HARDWARE_MOTHERBOARD),1128)
+else ifeq ($(HARDWARE_MOTHERBOARD),1125)
 # Formbot T-Rex 3
-else ifeq ($(HARDWARE_MOTHERBOARD),1129)
+else ifeq ($(HARDWARE_MOTHERBOARD),1126)
 # Formbot Raptor
-else ifeq ($(HARDWARE_MOTHERBOARD),1130)
+else ifeq ($(HARDWARE_MOTHERBOARD),1127)
 # Formbot Raptor 2
-else ifeq ($(HARDWARE_MOTHERBOARD),1131)
+else ifeq ($(HARDWARE_MOTHERBOARD),1128)
 # bq ZUM Mega 3D
-else ifeq ($(HARDWARE_MOTHERBOARD),1132)
+else ifeq ($(HARDWARE_MOTHERBOARD),1129)
 # MakeBoard Mini v2.1.2 is a control board sold by MicroMake
-else ifeq ($(HARDWARE_MOTHERBOARD),1133)
+else ifeq ($(HARDWARE_MOTHERBOARD),1130)
 # TriGorilla Anycubic version 1.3 based on RAMPS EFB
-else ifeq ($(HARDWARE_MOTHERBOARD),1134)
+else ifeq ($(HARDWARE_MOTHERBOARD),1131)
 # TriGorilla Anycubic version 1.4 based on RAMPS EFB
-else ifeq ($(HARDWARE_MOTHERBOARD),1135)
+else ifeq ($(HARDWARE_MOTHERBOARD),1132)
 # TriGorilla Anycubic version 1.4 Rev 1.1
-else ifeq ($(HARDWARE_MOTHERBOARD),1136)
+else ifeq ($(HARDWARE_MOTHERBOARD),1133)
 # Creality: Ender-4, CR-8
-else ifeq ($(HARDWARE_MOTHERBOARD),1137)
+else ifeq ($(HARDWARE_MOTHERBOARD),1134)
 # Creality: CR10S, CR20, CR-X
-else ifeq ($(HARDWARE_MOTHERBOARD),1138)
+else ifeq ($(HARDWARE_MOTHERBOARD),1135)
 # Dagoma F5
-else ifeq ($(HARDWARE_MOTHERBOARD),1139)
-# FYSETC F6 1.3
-else ifeq ($(HARDWARE_MOTHERBOARD),1140)
-# FYSETC F6 1.5
-else ifeq ($(HARDWARE_MOTHERBOARD),1141)
+else ifeq ($(HARDWARE_MOTHERBOARD),1136)
+# FYSETC F6
+else ifeq ($(HARDWARE_MOTHERBOARD),1137)
 # Duplicator i3 Plus
-else ifeq ($(HARDWARE_MOTHERBOARD),1142)
+else ifeq ($(HARDWARE_MOTHERBOARD),1138)
 # VORON
-else ifeq ($(HARDWARE_MOTHERBOARD),1143)
+else ifeq ($(HARDWARE_MOTHERBOARD),1139)
 # TRONXY V3 1.0
-else ifeq ($(HARDWARE_MOTHERBOARD),1144)
+else ifeq ($(HARDWARE_MOTHERBOARD),1140)
 # Z-Bolt X Series
-else ifeq ($(HARDWARE_MOTHERBOARD),1145)
+else ifeq ($(HARDWARE_MOTHERBOARD),1141)
 # TT OSCAR
-else ifeq ($(HARDWARE_MOTHERBOARD),1146)
+else ifeq ($(HARDWARE_MOTHERBOARD),1142)
 # Overlord/Overlord Pro
-else ifeq ($(HARDWARE_MOTHERBOARD),1147)
+else ifeq ($(HARDWARE_MOTHERBOARD),1143)
 # ADIMLab Gantry v1
-else ifeq ($(HARDWARE_MOTHERBOARD),1148)
+else ifeq ($(HARDWARE_MOTHERBOARD),1144)
 # ADIMLab Gantry v2
-else ifeq ($(HARDWARE_MOTHERBOARD),1149)
+else ifeq ($(HARDWARE_MOTHERBOARD),1145)
 # BIQU Tango V1
-else ifeq ($(HARDWARE_MOTHERBOARD),1150)
+else ifeq ($(HARDWARE_MOTHERBOARD),1146)
 # MKS GEN L V2
-else ifeq ($(HARDWARE_MOTHERBOARD),1151)
-# MKS GEN L V2.1
-else ifeq ($(HARDWARE_MOTHERBOARD),1152)
-# Copymaster 3D
-else ifeq ($(HARDWARE_MOTHERBOARD),1153)
-# Ortur 4
-else ifeq ($(HARDWARE_MOTHERBOARD),1154)
-# Tenlog D3 Hero
-else ifeq ($(HARDWARE_MOTHERBOARD),1155)
+else ifeq ($(HARDWARE_MOTHERBOARD),1147)

 #
 # RAMBo and derivatives
@@ -451,8 +279,6 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1203)
 else ifeq ($(HARDWARE_MOTHERBOARD),1204)
 # abee Scoovo X9H
 else ifeq ($(HARDWARE_MOTHERBOARD),1205)
-# Rambo ThinkerV2
-else ifeq ($(HARDWARE_MOTHERBOARD),1206)

 #
 # Other ATmega1280, ATmega2560
@@ -486,38 +312,20 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1311)
 else ifeq ($(HARDWARE_MOTHERBOARD),1312)
 # Mega controller
 else ifeq ($(HARDWARE_MOTHERBOARD),1313)
-# Geeetech GT2560 Rev A
-else ifeq ($(HARDWARE_MOTHERBOARD),1314)
-# Geeetech GT2560 Rev A+ (with auto level probe)
-else ifeq ($(HARDWARE_MOTHERBOARD),1315)
-# Geeetech GT2560 Rev B
-else ifeq ($(HARDWARE_MOTHERBOARD),1316)
-# Geeetech GT2560 Rev B for A10(M/T/D)
-else ifeq ($(HARDWARE_MOTHERBOARD),1317)
-# Geeetech GT2560 Rev B for A10(M/T/D)
-else ifeq ($(HARDWARE_MOTHERBOARD),1318)
 # Geeetech GT2560 Rev B for Mecreator2
-else ifeq ($(HARDWARE_MOTHERBOARD),1319)
-# Geeetech GT2560 Rev B for A20(M/T/D)
-else ifeq ($(HARDWARE_MOTHERBOARD),1320)
+else ifeq ($(HARDWARE_MOTHERBOARD),1314)
+# Geeetech GT2560 Rev. A
+else ifeq ($(HARDWARE_MOTHERBOARD),1315)
+# Geeetech GT2560 Rev. A+ (with auto level probe)
+else ifeq ($(HARDWARE_MOTHERBOARD),1316)
+# Geeetech GT2560 Rev B for A10(M/D)
+else ifeq ($(HARDWARE_MOTHERBOARD),1317)
+# Geeetech GT2560 Rev B for A20(M/D)
+else ifeq ($(HARDWARE_MOTHERBOARD),1318)
 # Einstart retrofit
-else ifeq ($(HARDWARE_MOTHERBOARD),1321)
+else ifeq ($(HARDWARE_MOTHERBOARD),1319)
 # Wanhao 0ne+ i3 Mini
-else ifeq ($(HARDWARE_MOTHERBOARD),1322)
-# Leapfrog Xeed 2015
-else ifeq ($(HARDWARE_MOTHERBOARD),1323)
-# PICA Shield (original version)
-else ifeq ($(HARDWARE_MOTHERBOARD),1324)
-# PICA Shield (rev C or later)
-else ifeq ($(HARDWARE_MOTHERBOARD),1325)
-# Intamsys 4.0 (Funmat HT)
-else ifeq ($(HARDWARE_MOTHERBOARD),1326)
-# Malyan M180 Mainboard Version 2 (no display function, direct G-code only)
-else ifeq ($(HARDWARE_MOTHERBOARD),1327)
-# Geeetech GT2560 Rev B for A20(M/T/D)
-else ifeq ($(HARDWARE_MOTHERBOARD),1328)
-# Mega controller & Protoneer CNC Shield V3.00
-else ifeq ($(HARDWARE_MOTHERBOARD),1329)
+else ifeq ($(HARDWARE_MOTHERBOARD),1320)

 #
 # ATmega1281, ATmega2561
@@ -526,11 +334,9 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1329)
 # Minitronics v1.0/1.1
 else ifeq ($(HARDWARE_MOTHERBOARD),1400)
  MCU              ?= atmega1281
-  PROG_MCU         ?= m1281
 # Silvergate v1.0
 else ifeq ($(HARDWARE_MOTHERBOARD),1401)
  MCU              ?= atmega1281
-  PROG_MCU         ?= m1281

 #
 # Sanguinololu and Derivatives - ATmega644P, ATmega1284P
@@ -540,62 +346,42 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1401)
 else ifeq ($(HARDWARE_MOTHERBOARD),1500)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p
 # Sanguinololu 1.2 and above
 else ifeq ($(HARDWARE_MOTHERBOARD),1501)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p
 # Melzi
 else ifeq ($(HARDWARE_MOTHERBOARD),1502)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p
-# Melzi V2.0
+# Melzi with ATmega1284 (MaKr3d version)
 else ifeq ($(HARDWARE_MOTHERBOARD),1503)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega1284p
-  PROG_MCU         ?= m1284p
-# Melzi with ATmega1284 (MaKr3d version)
+# Melzi Creality3D board (for CR-10 etc)
 else ifeq ($(HARDWARE_MOTHERBOARD),1504)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega1284p
-  PROG_MCU         ?= m1284p
-# Melzi Creality3D board (for CR-10 etc)
+# Melzi Malyan M150 board
 else ifeq ($(HARDWARE_MOTHERBOARD),1505)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega1284p
-  PROG_MCU         ?= m1284p
-# Melzi Malyan M150 board
+# Tronxy X5S
 else ifeq ($(HARDWARE_MOTHERBOARD),1506)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega1284p
-  PROG_MCU         ?= m1284p
-# Tronxy X5S
+# STB V1.1
 else ifeq ($(HARDWARE_MOTHERBOARD),1507)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega1284p
-  PROG_MCU         ?= m1284p
-# STB V1.1
+# Azteeg X1
 else ifeq ($(HARDWARE_MOTHERBOARD),1508)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega1284p
-  PROG_MCU         ?= m1284p
-# Azteeg X1
+# Anet 1.0 (Melzi clone)
 else ifeq ($(HARDWARE_MOTHERBOARD),1509)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega1284p
-  PROG_MCU         ?= m1284p
-# Anet 1.0 (Melzi clone)
-else ifeq ($(HARDWARE_MOTHERBOARD),1510)
-  HARDWARE_VARIANT ?= Sanguino
-  MCU              ?= atmega1284p
-  PROG_MCU         ?= m1284p
-# ZoneStar ZMIB V2
-else ifeq ($(HARDWARE_MOTHERBOARD),1511)
-  HARDWARE_VARIANT ?= Sanguino
-  MCU              ?= atmega1284p
-  PROG_MCU         ?= m1284p

 #
 # Other ATmega644P, ATmega644, ATmega1284P
@@ -605,61 +391,50 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1511)
 else ifeq ($(HARDWARE_MOTHERBOARD),1600)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p
 # Gen3+
 else ifeq ($(HARDWARE_MOTHERBOARD),1601)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p
 # Gen6
 else ifeq ($(HARDWARE_MOTHERBOARD),1602)
  HARDWARE_VARIANT ?= Gen6
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p
 # Gen6 deluxe
 else ifeq ($(HARDWARE_MOTHERBOARD),1603)
  HARDWARE_VARIANT ?= Gen6
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p
 # Gen7 custom (Alfons3 Version)
 else ifeq ($(HARDWARE_MOTHERBOARD),1604)
  HARDWARE_VARIANT ?= Gen7
  MCU              ?= atmega644
-  PROG_MCU         ?= m644
  F_CPU            ?= 20000000
 # Gen7 v1.1, v1.2
 else ifeq ($(HARDWARE_MOTHERBOARD),1605)
  HARDWARE_VARIANT ?= Gen7
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p
  F_CPU            ?= 20000000
 # Gen7 v1.3
 else ifeq ($(HARDWARE_MOTHERBOARD),1606)
  HARDWARE_VARIANT ?= Gen7
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p
  F_CPU            ?= 20000000
 # Gen7 v1.4
 else ifeq ($(HARDWARE_MOTHERBOARD),1607)
  HARDWARE_VARIANT ?= Gen7
  MCU              ?= atmega1284p
-  PROG_MCU         ?= m1284p
  F_CPU            ?= 20000000
 # Alpha OMCA board
 else ifeq ($(HARDWARE_MOTHERBOARD),1608)
  HARDWARE_VARIANT ?= SanguinoA
  MCU              ?= atmega644
-  PROG_MCU         ?= m644
 # Final OMCA board
 else ifeq ($(HARDWARE_MOTHERBOARD),1609)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p
 # Sethi 3D_1
 else ifeq ($(HARDWARE_MOTHERBOARD),1610)
  HARDWARE_VARIANT ?= Sanguino
  MCU              ?= atmega644p
-  PROG_MCU         ?= m644p

 #
 # Teensyduino - AT90USB1286, AT90USB1286P
@@ -669,60 +444,51 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1610)
 else ifeq ($(HARDWARE_MOTHERBOARD),1700)
  HARDWARE_VARIANT ?= Teensy
  MCU              ?= at90usb1286
-  PROG_MCU         ?= usb1286
 # Printrboard (AT90USB1286)
 else ifeq ($(HARDWARE_MOTHERBOARD),1701)
  HARDWARE_VARIANT ?= Teensy
  MCU              ?= at90usb1286
-  PROG_MCU         ?= usb1286
 # Printrboard Revision F (AT90USB1286)
 else ifeq ($(HARDWARE_MOTHERBOARD),1702)
  HARDWARE_VARIANT ?= Teensy
  MCU              ?= at90usb1286
-  PROG_MCU         ?= usb1286
 # Brainwave (AT90USB646)
 else ifeq ($(HARDWARE_MOTHERBOARD),1703)
  HARDWARE_VARIANT ?= Teensy
  MCU              ?= at90usb646
-  PROG_MCU         ?= usb646
 # Brainwave Pro (AT90USB1286)
 else ifeq ($(HARDWARE_MOTHERBOARD),1704)
  HARDWARE_VARIANT ?= Teensy
  MCU              ?= at90usb1286
-  PROG_MCU         ?= usb1286
 # SAV Mk-I (AT90USB1286)
 else ifeq ($(HARDWARE_MOTHERBOARD),1705)
  HARDWARE_VARIANT ?= Teensy
  MCU              ?= at90usb1286
-  PROG_MCU         ?= usb1286
 # Teensy++2.0 (AT90USB1286)
 else ifeq ($(HARDWARE_MOTHERBOARD),1706)
  HARDWARE_VARIANT ?= Teensy
  MCU              ?= at90usb1286
-  PROG_MCU         ?= usb1286
 # 5DPrint D8 Driver Board
 else ifeq ($(HARDWARE_MOTHERBOARD),1707)
  HARDWARE_VARIANT ?= Teensy
  MCU              ?= at90usb1286
-  PROG_MCU         ?= usb1286

 # UltiMachine Archim1 (with DRV8825 drivers)
 else ifeq ($(HARDWARE_MOTHERBOARD),3023)
  HARDWARE_VARIANT ?= archim
  MCPU              = cortex-m3
-  F_CPU             = 84000000
+  F_CPU             = 84000000L
  IS_MCU            = 0
 # UltiMachine Archim2 (with TMC2130 drivers)
 else ifeq ($(HARDWARE_MOTHERBOARD),3024)
  HARDWARE_VARIANT ?= archim
  MCPU              = cortex-m3
-  F_CPU             = 84000000
+  F_CPU             = 84000000L
  IS_MCU            = 0
 endif

 # Be sure to regenerate speed_lookuptable.h with create_speed_lookuptable.py
 # if you are setting this to something other than 16MHz
-# Do not put the UL suffix, it's done later on.
 # Set to 16Mhz if not yet set.
 F_CPU ?= 16000000

@@ -732,8 +498,7 @@ IS_MCU ?= 1
 ifeq ($(IS_MCU),1)
  # Set to arduino, ATmega2560 if not yet set.
  HARDWARE_VARIANT ?= arduino
-  MCU              ?= atmega2560
-  PROG_MCU         ?= m2560
+  MCU ?= atmega2560

  TOOL_PREFIX = avr
  MCU_FLAGS   = -mmcu=$(MCU)
@@ -764,36 +529,27 @@ VPATH += $(BUILD_DIR)
 VPATH += $(HARDWARE_SRC)

 ifeq ($(HARDWARE_VARIANT), $(filter $(HARDWARE_VARIANT),arduino Teensy Sanguino))
-  # Old libraries (avr-core 1.6.21 < / Arduino < 1.6.8)
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SPI
-  # New libraries (avr-core >= 1.6.21 / Arduino >= 1.6.8)
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SPI/src
+VPATH += $(ARDUINO_INSTALL_DIR)/hardware/marlin/avr/libraries/LiquidCrystal/src
+VPATH += $(ARDUINO_INSTALL_DIR)/hardware/marlin/avr/libraries/SPI
 endif

 ifeq ($(IS_MCU),1)
  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/cores/arduino

-  # Old libraries (avr-core 1.6.21 < / Arduino < 1.6.8)
  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SPI
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SoftwareSerial
-  # New libraries (avr-core >= 1.6.21 / Arduino >= 1.6.8)
  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SPI/src
  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/SoftwareSerial/src
 endif

 VPATH += $(ARDUINO_INSTALL_DIR)/libraries/LiquidCrystal/src
-
 ifeq ($(LIQUID_TWI2), 1)
-  WIRE   = 1
-  VPATH += $(ARDUINO_INSTALL_DIR)/libraries/LiquidTWI2
+VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Wire
+VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Wire/utility
+VPATH += $(ARDUINO_INSTALL_DIR)/libraries/LiquidTWI2
 endif
 ifeq ($(WIRE), 1)
-  # Old libraries (avr-core 1.6.21 / Arduino < 1.6.8)
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/Wire
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/Wire/utility
-  # New libraries (avr-core >= 1.6.21 / Arduino >= 1.6.8)
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/Wire/src
-  VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/avr/libraries/Wire/src/utility
+VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Wire
+VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Wire/utility
 endif
 ifeq ($(NEOPIXEL), 1)
 VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Adafruit_NeoPixel
@@ -865,23 +621,13 @@ ifeq ($(WIRE), 1)
  LIB_CXXSRC += Wire.cpp
 endif

-ifeq ($(TONE), 1)
-  LIB_CXXSRC += Tone.cpp
-endif
-
 ifeq ($(U8GLIB), 1)
  LIB_CXXSRC += U8glib.cpp
-  LIB_SRC += u8g_ll_api.c u8g_bitmap.c u8g_clip.c u8g_com_null.c u8g_delay.c \
-    u8g_page.c u8g_pb.c u8g_pb16h1.c u8g_rect.c u8g_state.c u8g_font.c \
-    u8g_font_6x13.c u8g_font_04b_03.c u8g_font_5x8.c
+  LIB_SRC += u8g_ll_api.c u8g_bitmap.c u8g_clip.c u8g_com_null.c u8g_delay.c u8g_page.c u8g_pb.c u8g_pb16h1.c u8g_rect.c u8g_state.c u8g_font.c u8g_font_6x13.c u8g_font_04b_03.c u8g_font_5x8.c
 endif

 ifeq ($(TMC), 1)
-  LIB_CXXSRC += TMCStepper.cpp COOLCONF.cpp DRV_STATUS.cpp IHOLD_IRUN.cpp \
-    CHOPCONF.cpp GCONF.cpp PWMCONF.cpp DRV_CONF.cpp DRVCONF.cpp DRVCTRL.cpp \
-    DRVSTATUS.cpp ENCMODE.cpp RAMP_STAT.cpp SGCSCONF.cpp SHORT_CONF.cpp \
-    SMARTEN.cpp SW_MODE.cpp SW_SPI.cpp TMC2130Stepper.cpp TMC2208Stepper.cpp \
-    TMC2209Stepper.cpp TMC2660Stepper.cpp TMC5130Stepper.cpp TMC5160Stepper.cpp
+  LIB_CXXSRC += TMCStepper.cpp COOLCONF.cpp DRV_STATUS.cpp IHOLD_IRUN.cpp CHOPCONF.cpp GCONF.cpp PWMCONF.cpp DRV_CONF.cpp DRVCONF.cpp DRVCTRL.cpp DRVSTATUS.cpp ENCMODE.cpp RAMP_STAT.cpp SGCSCONF.cpp SHORT_CONF.cpp SMARTEN.cpp SW_MODE.cpp SW_SPI.cpp TMC2130Stepper.cpp TMC2208Stepper.cpp TMC2209Stepper.cpp TMC2660Stepper.cpp TMC5130Stepper.cpp TMC5160Stepper.cpp
 endif

 ifeq ($(RELOC_WORKAROUND), 1)
@@ -923,23 +669,17 @@ REMOVE = rm -f
 MV = mv -f

 # Place -D or -U options here
-CDEFS    = -DF_CPU=$(F_CPU)UL ${addprefix -D , $(DEFINES)} -DARDUINO=$(ARDUINO_VERSION)
+CDEFS    = -DF_CPU=$(F_CPU) ${addprefix -D , $(DEFINES)} -DARDUINO=$(ARDUINO_VERSION)
 CXXDEFS  = $(CDEFS)

 ifeq ($(HARDWARE_VARIANT), Teensy)
-  CDEFS      += -DUSB_SERIAL
+  CDEFS  += -DUSB_SERIAL
  LIB_SRC    += usb.c pins_teensy.c
  LIB_CXXSRC += usb_api.cpp

 else ifeq ($(HARDWARE_VARIANT), archim)
-  CDEFS      += -DARDUINO_SAM_ARCHIM -DARDUINO_ARCH_SAM -D__SAM3X8E__
-  CDEFS      += -DUSB_VID=0x27B1 -DUSB_PID=0x0001 -DUSBCON
-  CDEFS      += '-DUSB_MANUFACTURER="UltiMachine"' '-DUSB_PRODUCT_STRING="Archim"'
-
-  LIB_CXXSRC += variant.cpp IPAddress.cpp Reset.cpp RingBuffer.cpp Stream.cpp \
-    UARTClass.cpp  USARTClass.cpp abi.cpp new.cpp watchdog.cpp CDC.cpp \
-    PluggableUSB.cpp USBCore.cpp
-
+  CDEFS      += -DARDUINO_SAM_ARCHIM -DARDUINO_ARCH_SAM -D__SAM3X8E__ -DUSB_VID=0x27b1 -DUSB_PID=0x0001 -DUSBCON '-DUSB_MANUFACTURER="UltiMachine"' '-DUSB_PRODUCT="Archim"'
+  LIB_CXXSRC += variant.cpp IPAddress.cpp Reset.cpp RingBuffer.cpp Stream.cpp UARTClass.cpp  USARTClass.cpp abi.cpp new.cpp watchdog.cpp CDC.cpp PluggableUSB.cpp  USBCore.cpp
  LIB_SRC    += cortex_handlers.c iar_calls_sam3.c syscalls_sam3.c dtostrf.c itoa.c

  ifeq ($(U8GLIB), 1)
@@ -965,20 +705,16 @@ CTUNING = -fsigned-char -funsigned-bitfields -fno-exceptions \
 ifneq ($(HARDWARE_MOTHERBOARD),)
  CTUNING += -DMOTHERBOARD=${HARDWARE_MOTHERBOARD}
 endif
-
 #CEXTRA = -Wa,-adhlns=$(<:.c=.lst)
 CXXEXTRA = -fno-use-cxa-atexit -fno-threadsafe-statics -fno-rtti
 CFLAGS := $(CDEBUG) $(CDEFS) $(CINCS) -O$(OPT) $(CEXTRA)   $(CTUNING) $(CSTANDARD)
 CXXFLAGS :=         $(CDEFS) $(CINCS) -O$(OPT) $(CXXEXTRA) $(CTUNING) $(CXXSTANDARD)
 ASFLAGS :=          $(CDEFS)
 #ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs
-
 ifeq ($(HARDWARE_VARIANT), archim)
  LD_PREFIX = -Wl,--gc-sections,-Map,Marlin.ino.map,--cref,--check-sections,--entry=Reset_Handler,--unresolved-symbols=report-all,--warn-common,--warn-section-align
  LD_SUFFIX = $(LDLIBS)
-
-  LDFLAGS   = -lm -T$(LDSCRIPT) -u _sbrk -u link -u _close -u _fstat -u _isatty
-  LDFLAGS  += -u _lseek -u _read -u _write -u _exit -u kill -u _getpid
+  LDFLAGS   = -lm -T$(LDSCRIPT) -u _sbrk -u link -u _close -u _fstat -u _isatty -u _lseek -u _read -u _write -u _exit -u kill -u _getpid
 else
  LD_PREFIX = -Wl,--gc-sections,--relax
  LDFLAGS   = -lm
@@ -994,7 +730,7 @@ else
  AVRDUDE_CONF = $(ARDUINO_INSTALL_DIR)/hardware/tools/avr/etc/avrdude.conf
 endif
 AVRDUDE_FLAGS = -D -C$(AVRDUDE_CONF) \
-  -p$(PROG_MCU) -P$(AVRDUDE_PORT) -c$(AVRDUDE_PROGRAMMER) \
+  -p$(MCU) -P$(AVRDUDE_PORT) -c$(AVRDUDE_PROGRAMMER) \
  -b$(UPLOAD_RATE)

 # Since Marlin 2.0, the source files may be distributed into several
@@ -1095,7 +831,7 @@ extcoff: $(TARGET).elf

 .elf.eep:
 	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
-	  --change-section-lma .eeprom=0 -O $(FORMAT) $< $@
+    --change-section-lma .eeprom=0 -O $(FORMAT) $< $@

 # Create extended listing file from ELF output file.
 .elf.lss:
@@ -1109,7 +845,7 @@ extcoff: $(TARGET).elf

 $(BUILD_DIR)/$(TARGET).elf: $(OBJ) Configuration.h
 	$(Pecho) "  CXX   $@"
-	$P $(CXX) $(LD_PREFIX) $(ALL_CXXFLAGS) -o $@ -L. $(OBJ) $(LDFLAGS) $(LD_SUFFIX)
+	$P $(CC) $(LD_PREFIX) $(ALL_CXXFLAGS) -o $@ -L. $(OBJ) $(LDFLAGS) $(LD_SUFFIX)

 # Object files that were found in "src" will be stored in $(BUILD_DIR)
 # in directories that mirror the structure of "src"
@@ -1144,5 +880,5 @@ clean:

 .PHONY: all build elf hex eep lss sym program coff extcoff clean depend sizebefore sizeafter

-# Automatically include the dependency files created by gcc
+# Automaticaly include the dependency files created by gcc
 -include ${patsubst %.o, %.d, ${OBJ}}
--- a/Marlin/Marlin.ino
+++ b/Marlin/Marlin.ino
@@ -1,8 +1,9 @@
-/*==============================================================================
+/*
+================================================================================

  Marlin Firmware

-  (c) 2011-2020 MarlinFirmware
+  (c) 2011-2019 MarlinFirmware
  Portions of Marlin are (c) by their respective authors.
  All code complies with GPLv2 and/or GPLv3

@@ -11,33 +12,30 @@
 Greetings! Thank you for choosing Marlin 2 as your 3D printer firmware.

 To configure Marlin you must edit Configuration.h and Configuration_adv.h
-located in the root 'Marlin' folder. Check our Configurations repository to
-see if there's a more suitable starting-point for your specific hardware.
+located in the root 'Marlin' folder. Check the config/examples folder to see if
+there's a more suitable starting-point for your specific hardware.

 Before diving in, we recommend the following essential links:

 Marlin Firmware Official Website

-  - https://marlinfw.org/
+  - http://marlinfw.org/
    The official Marlin Firmware website contains the most up-to-date
    documentation. Contributions are always welcome!

 Configuration

-  - https://github.com/MarlinFirmware/Configurations
-    Example configurations for several printer models.
-
  - https://www.youtube.com/watch?v=3gwWVFtdg-4
    A good 20-minute overview of Marlin configuration by Tom Sanladerer.
    (Applies to Marlin 1.0.x, so Jerk and Acceleration should be halved.)
    Also... https://www.google.com/search?tbs=vid%3A1&q=configure+marlin

-  - https://marlinfw.org/docs/configuration/configuration.html
+  - http://marlinfw.org/docs/configuration/configuration.html
    Marlin's configuration options are explained in more detail here.

 Getting Help

-  - https://reprap.org/forum/list.php?415
+  - http://forums.reprap.org/list.php?415
    The Marlin Discussion Forum is a great place to get help from other Marlin
    users who may have experienced similar issues to your own.

@@ -47,11 +45,9 @@ Getting Help

 Contributing

-  - https://marlinfw.org/docs/development/contributing.html
+  - http://marlinfw.org/docs/development/contributing.html
    If you'd like to contribute to Marlin, read this first!

-  - https://marlinfw.org/docs/development/coding_standards.html
+  - http://marlinfw.org/docs/development/coding_standards.html
    Before submitting code get to know the Coding Standards.
-
-
------------------------------------------------------------------------------*/
+*/
--- a/Marlin/Version.h
+++ b/Marlin/Version.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -28,20 +28,20 @@
 /**
 * Marlin release version identifier
 */
-//#define SHORT_BUILD_VERSION "2.1.0.1"
+//#define SHORT_BUILD_VERSION "2.0.3"

 /**
 * Verbose version identifier which should contain a reference to the location
 * from where the binary was downloaded or the source code was compiled.
 */
-//#define DETAILED_BUILD_VERSION SHORT_BUILD_VERSION
+//#define DETAILED_BUILD_VERSION SHORT_BUILD_VERSION " (Github)"

 /**
 * The STRING_DISTRIBUTION_DATE represents when the binary file was built,
 * here we define this default string as the date where the latest release
 * version was tagged.
 */
-//#define STRING_DISTRIBUTION_DATE "2023-07-19"
+//#define STRING_DISTRIBUTION_DATE "2020-01-31"

 /**
 * Defines a generic printer name to be output to the LCD after booting Marlin.
@@ -54,7 +54,7 @@
 * has a distinct Github fork— the Source Code URL should just be the main
 * Marlin repository.
 */
-//#define SOURCE_CODE_URL "github.com/MarlinFirmware/Marlin"
+//#define SOURCE_CODE_URL "https://github.com/MarlinFirmware/Marlin"

 /**
 * Default generic printer UUID.
@@ -65,12 +65,12 @@
 * The WEBSITE_URL is the location where users can get more information such as
 * documentation about a specific Marlin release.
 */
-//#define WEBSITE_URL "marlinfw.org"
+//#define WEBSITE_URL "http://marlinfw.org"

 /**
 * Set the vendor info the serial USB interface, if changable
 * Currently only supported by DUE platform
 */
-//#define USB_DEVICE_VENDOR_ID           0x0000
-//#define USB_DEVICE_PRODUCT_ID          0x0000
-//#define USB_DEVICE_MANUFACTURE_NAME    WEBSITE_URL
+//#define  USB_DEVICE_VENDOR_ID           0x0000
+//#define  USB_DEVICE_PRODUCT_ID          0x0000
+//#define  USB_DEVICE_MANUFACTURE_NAME    WEBSITE_URL
--- a/Marlin/lib/readme.txt
+++ b/Marlin/lib/readme.txt
@@ -33,4 +33,4 @@ PlatformIO will find your libraries automatically, configure preprocessor's
 include paths and build them.

 More information about PlatformIO Library Dependency Finder
- https://docs.platformio.org/page/librarymanager/ldf.html
+- http://docs.platformio.org/page/librarymanager/ldf.html
--- a/Marlin/src/HAL/AVR/HAL.cpp
+++ b/Marlin/src/HAL/AVR/HAL.cpp
@@ -1,172 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#ifdef __AVR__
-
-#include "../../inc/MarlinConfig.h"
-#include "HAL.h"
-#include <avr/wdt.h>
-
-#ifdef USBCON
-  DefaultSerial1 MSerial0(false, Serial);
-  #ifdef BLUETOOTH
-    BTSerial btSerial(false, bluetoothSerial);
-  #endif
-#endif
-
-// ------------------------
-// Public Variables
-// ------------------------
-
-// Don't initialize/override variable (which would happen in .init4)
-uint8_t MarlinHAL::reset_reason __attribute__((section(".noinit")));
-
-// ------------------------
-// Public functions
-// ------------------------
-
-__attribute__((naked))             // Don't output function pro- and epilogue
-__attribute__((used))              // Output the function, even if "not used"
-__attribute__((section(".init3"))) // Put in an early user definable section
-void save_reset_reason() {
-  #if ENABLED(OPTIBOOT_RESET_REASON)
-    __asm__ __volatile__(
-      A("STS %0, r2")
-      : "=m"(hal.reset_reason)
-    );
-  #else
-    hal.reset_reason = MCUSR;
-  #endif
-
-  // Clear within 16ms since WDRF bit enables a 16ms watchdog timer -> Boot loop
-  hal.clear_reset_source();
-  wdt_disable();
-}
-
-void MarlinHAL::init() {
-  // Init Servo Pins
-  #define INIT_SERVO(N) OUT_WRITE(SERVO##N##_PIN, LOW)
-  #if HAS_SERVO_0
-    INIT_SERVO(0);
-  #endif
-  #if HAS_SERVO_1
-    INIT_SERVO(1);
-  #endif
-  #if HAS_SERVO_2
-    INIT_SERVO(2);
-  #endif
-  #if HAS_SERVO_3
-    INIT_SERVO(3);
-  #endif
-
-  init_pwm_timers();   // Init user timers to default frequency - 1000HZ
-}
-
-void MarlinHAL::reboot() {
-  #if ENABLED(USE_WATCHDOG)
-    while (1) { /* run out the watchdog */ }
-  #else
-    void (*resetFunc)() = 0;  // Declare resetFunc() at address 0
-    resetFunc();              // Jump to address 0
-  #endif
-}
-
-// ------------------------
-// Watchdog Timer
-// ------------------------
-
-#if ENABLED(USE_WATCHDOG)
-
-  #include <avr/wdt.h>
-  #include "../../MarlinCore.h"
-
-  // Initialize watchdog with 8s timeout, if possible. Otherwise, make it 4s.
-  void MarlinHAL::watchdog_init() {
-    #if ENABLED(WATCHDOG_DURATION_8S) && defined(WDTO_8S)
-      #define WDTO_NS WDTO_8S
-    #else
-      #define WDTO_NS WDTO_4S
-    #endif
-    #if ENABLED(WATCHDOG_RESET_MANUAL)
-      // Enable the watchdog timer, but only for the interrupt.
-      // Take care, as this requires the correct order of operation, with interrupts disabled.
-      // See the datasheet of any AVR chip for details.
-      wdt_reset();
-      cli();
-      _WD_CONTROL_REG = _BV(_WD_CHANGE_BIT) | _BV(WDE);
-      _WD_CONTROL_REG = _BV(WDIE) | (WDTO_NS & 0x07) | ((WDTO_NS & 0x08) << 2); // WDTO_NS directly does not work. bit 0-2 are consecutive in the register but the highest value bit is at bit 5
-                                                                                // So worked for up to WDTO_2S
-      sei();
-      wdt_reset();
-    #else
-      wdt_enable(WDTO_NS); // The function handles the upper bit correct.
-    #endif
-    //delay(10000); // test it!
-  }
-
-  //===========================================================================
-  //=================================== ISR ===================================
-  //===========================================================================
-
-  // Watchdog timer interrupt, called if main program blocks >4sec and manual reset is enabled.
-  #if ENABLED(WATCHDOG_RESET_MANUAL)
-    ISR(WDT_vect) {
-      sei();  // With the interrupt driven serial we need to allow interrupts.
-      SERIAL_ERROR_MSG(STR_WATCHDOG_FIRED);
-      minkill();  // interrupt-safe final kill and infinite loop
-    }
-  #endif
-
-  // Reset watchdog. MUST be called at least every 4 seconds after the
-  // first watchdog_init or AVR will go into emergency procedures.
-  void MarlinHAL::watchdog_refresh() { wdt_reset(); }
-
-#endif // USE_WATCHDOG
-
-// ------------------------
-// Free Memory Accessor
-// ------------------------
-
-#if ENABLED(SDSUPPORT)
-
-  #include "../../sd/SdFatUtil.h"
-  int freeMemory() { return SdFatUtil::FreeRam(); }
-
-#else // !SDSUPPORT
-
-  extern "C" {
-    extern char __bss_end;
-    extern char __heap_start;
-    extern void* __brkval;
-
-    int freeMemory() {
-      int free_memory;
-      if ((int)__brkval == 0)
-        free_memory = ((int)&free_memory) - ((int)&__bss_end);
-      else
-        free_memory = ((int)&free_memory) - ((int)__brkval);
-      return free_memory;
-    }
-  }
-
-#endif // !SDSUPPORT
-
-#endif // __AVR__
--- a/Marlin/src/HAL/AVR/HAL.h
+++ b/Marlin/src/HAL/AVR/HAL.h
@@ -1,277 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#pragma once
-
-/**
- * HAL for Arduino AVR
- */
-
-#include "../shared/Marduino.h"
-#include "../shared/HAL_SPI.h"
-#include "fastio.h"
-#include "math.h"
-
-#ifdef USBCON
-  #include <HardwareSerial.h>
-#else
-  #include "MarlinSerial.h"
-#endif
-
-#include <stdint.h>
-#include <util/delay.h>
-#include <avr/eeprom.h>
-#include <avr/pgmspace.h>
-#include <avr/interrupt.h>
-#include <avr/io.h>
-
-//
-// Default graphical display delays
-//
-#if F_CPU >= 20000000
-  #define CPU_ST7920_DELAY_1 150
-  #define CPU_ST7920_DELAY_2   0
-  #define CPU_ST7920_DELAY_3 150
-#elif F_CPU == 16000000
-  #define CPU_ST7920_DELAY_1 125
-  #define CPU_ST7920_DELAY_2   0
-  #define CPU_ST7920_DELAY_3 188
-#endif
-
-#ifndef pgm_read_ptr
-  // Compatibility for avr-libc 1.8.0-4.1 included with Ubuntu for
-  // Windows Subsystem for Linux on Windows 10 as of 10/18/2019
-  #define pgm_read_ptr_far(address_long) (void*)__ELPM_word((uint32_t)(address_long))
-  #define pgm_read_ptr_near(address_short) (void*)__LPM_word((uint16_t)(address_short))
-  #define pgm_read_ptr(address_short) pgm_read_ptr_near(address_short)
-#endif
-
-// ------------------------
-// Defines
-// ------------------------
-
-// AVR PROGMEM extension for sprintf_P
-#define S_FMT "%S"
-
-// AVR PROGMEM extension for string define
-#define PGMSTR(NAM,STR) const char NAM[] PROGMEM = STR
-
-#ifndef CRITICAL_SECTION_START
-  #define CRITICAL_SECTION_START()  unsigned char _sreg = SREG; cli()
-  #define CRITICAL_SECTION_END()    SREG = _sreg
-#endif
-
-#define HAL_CAN_SET_PWM_FREQ   // This HAL supports PWM Frequency adjustment
-#define PWM_FREQUENCY 1000     // Default PWM frequency when set_pwm_duty() is called without set_pwm_frequency()
-
-// ------------------------
-// Types
-// ------------------------
-
-typedef int8_t pin_t;
-
-#define SHARED_SERVOS HAS_SERVOS  // Use shared/servos.cpp
-
-class Servo;
-typedef Servo hal_servo_t;
-
-// ------------------------
-// Serial ports
-// ------------------------
-
-#ifdef USBCON
-  #include "../../core/serial_hook.h"
-  typedef ForwardSerial1Class< decltype(Serial) > DefaultSerial1;
-  extern DefaultSerial1 MSerial0;
-  #ifdef BLUETOOTH
-    typedef ForwardSerial1Class< decltype(bluetoothSerial) > BTSerial;
-    extern BTSerial btSerial;
-  #endif
-
-  #define MYSERIAL1 TERN(BLUETOOTH, btSerial, MSerial0)
-#else
-  #if !WITHIN(SERIAL_PORT, -1, 3)
-    #error "SERIAL_PORT must be from 0 to 3, or -1 for USB Serial."
-  #endif
-  #define MYSERIAL1 customizedSerial1
-
-  #ifdef SERIAL_PORT_2
-    #if !WITHIN(SERIAL_PORT_2, -1, 3)
-      #error "SERIAL_PORT_2 must be from 0 to 3, or -1 for USB Serial."
-    #endif
-    #define MYSERIAL2 customizedSerial2
-  #endif
-
-  #ifdef SERIAL_PORT_3
-    #if !WITHIN(SERIAL_PORT_3, -1, 3)
-      #error "SERIAL_PORT_3 must be from 0 to 3, or -1 for USB Serial."
-    #endif
-    #define MYSERIAL3 customizedSerial3
-  #endif
-#endif
-
-#ifdef MMU2_SERIAL_PORT
-  #if !WITHIN(MMU2_SERIAL_PORT, -1, 3)
-    #error "MMU2_SERIAL_PORT must be from 0 to 3, or -1 for USB Serial."
-  #endif
-  #define MMU2_SERIAL mmuSerial
-#endif
-
-#ifdef LCD_SERIAL_PORT
-  #if !WITHIN(LCD_SERIAL_PORT, -1, 3)
-    #error "LCD_SERIAL_PORT must be from 0 to 3, or -1 for USB Serial."
-  #endif
-  #define LCD_SERIAL lcdSerial
-  #if HAS_DGUS_LCD
-    #define SERIAL_GET_TX_BUFFER_FREE() LCD_SERIAL.get_tx_buffer_free()
-  #endif
-#endif
-
-//
-// ADC
-//
-#define HAL_ADC_VREF        5.0
-#define HAL_ADC_RESOLUTION 10
-
-//
-// Pin Mapping for M42, M43, M226
-//
-#define GET_PIN_MAP_PIN(index) index
-#define GET_PIN_MAP_INDEX(pin) pin
-#define PARSED_PIN_INDEX(code, dval) parser.intval(code, dval)
-
-#define HAL_SENSITIVE_PINS 0, 1,
-
-#ifdef __AVR_AT90USB1286__
-  #define JTAG_DISABLE() do{ MCUCR = 0x80; MCUCR = 0x80; }while(0)
-#endif
-
-// AVR compatibility
-#define strtof strtod
-
-// ------------------------
-// Free Memory Accessor
-// ------------------------
-
-#pragma GCC diagnostic push
-#if GCC_VERSION <= 50000
-  #pragma GCC diagnostic ignored "-Wunused-function"
-#endif
-
-extern "C" int freeMemory();
-
-#pragma GCC diagnostic pop
-
-// ------------------------
-// MarlinHAL Class
-// ------------------------
-
-class MarlinHAL {
-public:
-
-  // Earliest possible init, before setup()
-  MarlinHAL() {}
-
-  // Watchdog
-  static void watchdog_init()    IF_DISABLED(USE_WATCHDOG, {});
-  static void watchdog_refresh() IF_DISABLED(USE_WATCHDOG, {});
-
-  static void init();          // Called early in setup()
-  static void init_board() {}  // Called less early in setup()
-  static void reboot();        // Restart the firmware from 0x0
-
-  // Interrupts
-  static bool isr_state() { return TEST(SREG, SREG_I); }
-  static void isr_on()  { sei(); }
-  static void isr_off() { cli(); }
-
-  static void delay_ms(const int ms) { _delay_ms(ms); }
-
-  // Tasks, called from idle()
-  static void idletask() {}
-
-  // Reset
-  static uint8_t reset_reason;
-  static uint8_t get_reset_source() { return reset_reason; }
-  static void clear_reset_source() { MCUSR = 0; }
-
-  // Free SRAM
-  static int freeMemory() { return ::freeMemory(); }
-
-  //
-  // ADC Methods
-  //
-
-  // Called by Temperature::init once at startup
-  static void adc_init() {
-    ADCSRA = _BV(ADEN) | _BV(ADSC) | _BV(ADIF) | 0x07;
-    DIDR0 = 0;
-    #ifdef DIDR2
-      DIDR2 = 0;
-    #endif
-  }
-
-  // Called by Temperature::init for each sensor at startup
-  static void adc_enable(const uint8_t ch) {
-    #ifdef DIDR2
-      if (ch > 7) { SBI(DIDR2, ch & 0x07); return; }
-    #endif
-    SBI(DIDR0, ch);
-  }
-
-  // Begin ADC sampling on the given channel. Called from Temperature::isr!
-  static void adc_start(const uint8_t ch) {
-    #ifdef MUX5
-      ADCSRB = ch > 7 ? _BV(MUX5) : 0;
-    #else
-      ADCSRB = 0;
-    #endif
-    ADMUX = _BV(REFS0) | (ch & 0x07);
-    SBI(ADCSRA, ADSC);
-  }
-
-  // Is the ADC ready for reading?
-  static bool adc_ready() { return !TEST(ADCSRA, ADSC); }
-
-  // The current value of the ADC register
-  static __typeof__(ADC) adc_value() { return ADC; }
-
-  /**
-   * init_pwm_timers
-   * Set the default frequency for timers 2-5 to 1000HZ
-   */
-  static void init_pwm_timers();
-
-  /**
-   * Set the PWM duty cycle for the pin to the given value.
-   * Optionally invert the duty cycle [default = false]
-   * Optionally change the scale of the provided value to enable finer PWM duty control [default = 255]
-   */
-  static void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size=255, const bool invert=false);
-
-  /**
-   * Set the frequency of the timer for the given pin as close as
-   * possible to the provided desired frequency. Internally calculate
-   * the required waveform generation mode, prescaler, and resolution
-   * values and set timer registers accordingly.
-   * NOTE that the frequency is applied to all pins on the timer (Ex OC3A, OC3B and OC3B)
-   * NOTE that there are limitations, particularly if using TIMER2. (see Configuration_adv.h -> FAST_PWM_FAN Settings)
-   */
-  static void set_pwm_frequency(const pin_t pin, const uint16_t f_desired);
-};
--- a/Marlin/src/HAL/AVR/MarlinSerial.cpp
+++ b/Marlin/src/HAL/AVR/MarlinSerial.cpp
@@ -1,652 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-
-/**
- * MarlinSerial.cpp - Hardware serial library for Wiring
- * Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
- *
- * Modified 23 November 2006 by David A. Mellis
- * Modified 28 September 2010 by Mark Sproul
- * Modified 14 February 2016 by Andreas Hardtung (added tx buffer)
- * Modified 01 October 2017 by Eduardo José Tagle (added XON/XOFF)
- * Modified 10 June 2018 by Eduardo José Tagle (See #10991)
- * Templatized 01 October 2018 by Eduardo José Tagle to allow multiple instances
- */
-
-#ifdef __AVR__
-
-// Disable HardwareSerial.cpp to support chips without a UART (Attiny, etc.)
-
-#include "../../inc/MarlinConfig.h"
-
-#if !defined(USBCON) && (defined(UBRRH) || defined(UBRR0H) || defined(UBRR1H) || defined(UBRR2H) || defined(UBRR3H))
-
-#include "MarlinSerial.h"
-#include "../../MarlinCore.h"
-
-#if ENABLED(DIRECT_STEPPING)
-  #include "../../feature/direct_stepping.h"
-#endif
-
-template<typename Cfg> typename MarlinSerial<Cfg>::ring_buffer_r MarlinSerial<Cfg>::rx_buffer = { 0, 0, { 0 } };
-template<typename Cfg> typename MarlinSerial<Cfg>::ring_buffer_t MarlinSerial<Cfg>::tx_buffer = { 0 };
-template<typename Cfg> bool     MarlinSerial<Cfg>::_written = false;
-template<typename Cfg> uint8_t  MarlinSerial<Cfg>::xon_xoff_state = MarlinSerial<Cfg>::XON_XOFF_CHAR_SENT | MarlinSerial<Cfg>::XON_CHAR;
-template<typename Cfg> uint8_t  MarlinSerial<Cfg>::rx_dropped_bytes = 0;
-template<typename Cfg> uint8_t  MarlinSerial<Cfg>::rx_buffer_overruns = 0;
-template<typename Cfg> uint8_t  MarlinSerial<Cfg>::rx_framing_errors = 0;
-template<typename Cfg> typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::rx_max_enqueued = 0;
-
-// A SW memory barrier, to ensure GCC does not overoptimize loops
-#define sw_barrier() asm volatile("": : :"memory");
-
-#include "../../feature/e_parser.h"
-
-// "Atomically" read the RX head index value without disabling interrupts:
-// This MUST be called with RX interrupts enabled, and CAN'T be called
-// from the RX ISR itself!
-template<typename Cfg>
-FORCE_INLINE typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::atomic_read_rx_head() {
-  if (Cfg::RX_SIZE > 256) {
-    // Keep reading until 2 consecutive reads return the same value,
-    // meaning there was no update in-between caused by an interrupt.
-    // This works because serial RX interrupts happen at a slower rate
-    // than successive reads of a variable, so 2 consecutive reads with
-    // the same value means no interrupt updated it.
-    ring_buffer_pos_t vold, vnew = rx_buffer.head;
-    sw_barrier();
-    do {
-      vold = vnew;
-      vnew = rx_buffer.head;
-      sw_barrier();
-    } while (vold != vnew);
-    return vnew;
-  }
-  else {
-    // With an 8bit index, reads are always atomic. No need for special handling
-    return rx_buffer.head;
-  }
-}
-
-template<typename Cfg>
-volatile bool MarlinSerial<Cfg>::rx_tail_value_not_stable = false;
-template<typename Cfg>
-volatile uint16_t MarlinSerial<Cfg>::rx_tail_value_backup = 0;
-
-// Set RX tail index, taking into account the RX ISR could interrupt
-//  the write to this variable in the middle - So a backup strategy
-//  is used to ensure reads of the correct values.
-//    -Must NOT be called from the RX ISR -
-template<typename Cfg>
-FORCE_INLINE void MarlinSerial<Cfg>::atomic_set_rx_tail(typename MarlinSerial<Cfg>::ring_buffer_pos_t value) {
-  if (Cfg::RX_SIZE > 256) {
-    // Store the new value in the backup
-    rx_tail_value_backup = value;
-    sw_barrier();
-    // Flag we are about to change the true value
-    rx_tail_value_not_stable = true;
-    sw_barrier();
-    // Store the new value
-    rx_buffer.tail = value;
-    sw_barrier();
-    // Signal the new value is completely stored into the value
-    rx_tail_value_not_stable = false;
-    sw_barrier();
-  }
-  else
-    rx_buffer.tail = value;
-}
-
-// Get the RX tail index, taking into account the read could be
-//  interrupting in the middle of the update of that index value
-//    -Called from the RX ISR -
-template<typename Cfg>
-FORCE_INLINE typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::atomic_read_rx_tail() {
-  if (Cfg::RX_SIZE > 256) {
-    // If the true index is being modified, return the backup value
-    if (rx_tail_value_not_stable) return rx_tail_value_backup;
-  }
-  // The true index is stable, return it
-  return rx_buffer.tail;
-}
-
-// (called with RX interrupts disabled)
-template<typename Cfg>
-FORCE_INLINE void MarlinSerial<Cfg>::store_rxd_char() {
-
-  static EmergencyParser::State emergency_state; // = EP_RESET
-
-  // This must read the R_UCSRA register before reading the received byte to detect error causes
-  if (Cfg::DROPPED_RX && B_DOR && !++rx_dropped_bytes) --rx_dropped_bytes;
-  if (Cfg::RX_OVERRUNS && B_DOR && !++rx_buffer_overruns) --rx_buffer_overruns;
-  if (Cfg::RX_FRAMING_ERRORS && B_FE && !++rx_framing_errors) --rx_framing_errors;
-
-  // Read the character from the USART
-  uint8_t c = R_UDR;
-
-  #if ENABLED(DIRECT_STEPPING)
-    if (page_manager.maybe_store_rxd_char(c)) return;
-  #endif
-
-  // Get the tail - Nothing can alter its value while this ISR is executing, but there's
-  // a chance that this ISR interrupted the main process while it was updating the index.
-  // The backup mechanism ensures the correct value is always returned.
-  const ring_buffer_pos_t t = atomic_read_rx_tail();
-
-  // Get the head pointer - This ISR is the only one that modifies its value, so it's safe to read here
-  ring_buffer_pos_t h = rx_buffer.head;
-
-  // Get the next element
-  ring_buffer_pos_t i = (ring_buffer_pos_t)(h + 1) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
-
-  if (Cfg::EMERGENCYPARSER) emergency_parser.update(emergency_state, c);
-
-  // If the character is to be stored at the index just before the tail
-  // (such that the head would advance to the current tail), the RX FIFO is
-  // full, so don't write the character or advance the head.
-  if (i != t) {
-    rx_buffer.buffer[h] = c;
-    h = i;
-  }
-  else if (Cfg::DROPPED_RX && !++rx_dropped_bytes)
-    --rx_dropped_bytes;
-
-  if (Cfg::MAX_RX_QUEUED) {
-    // Calculate count of bytes stored into the RX buffer
-    const ring_buffer_pos_t rx_count = (ring_buffer_pos_t)(h - t) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
-
-    // Keep track of the maximum count of enqueued bytes
-    NOLESS(rx_max_enqueued, rx_count);
-  }
-
-  if (Cfg::XONOFF) {
-    // If the last char that was sent was an XON
-    if ((xon_xoff_state & XON_XOFF_CHAR_MASK) == XON_CHAR) {
-
-      // Bytes stored into the RX buffer
-      const ring_buffer_pos_t rx_count = (ring_buffer_pos_t)(h - t) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
-
-      // If over 12.5% of RX buffer capacity, send XOFF before running out of
-      // RX buffer space .. 325 bytes @ 250kbits/s needed to let the host react
-      // and stop sending bytes. This translates to 13mS propagation time.
-      if (rx_count >= (Cfg::RX_SIZE) / 8) {
-
-        // At this point, definitely no TX interrupt was executing, since the TX ISR can't be preempted.
-        // Don't enable the TX interrupt here as a means to trigger the XOFF char, because if it happens
-        // to be in the middle of trying to disable the RX interrupt in the main program, eventually the
-        // enabling of the TX interrupt could be undone. The ONLY reliable thing this can do to ensure
-        // the sending of the XOFF char is to send it HERE AND NOW.
-
-        // About to send the XOFF char
-        xon_xoff_state = XOFF_CHAR | XON_XOFF_CHAR_SENT;
-
-        // Wait until the TX register becomes empty and send it - Here there could be a problem
-        // - While waiting for the TX register to empty, the RX register could receive a new
-        //   character. This must also handle that situation!
-        while (!B_UDRE) {
-
-          if (B_RXC) {
-            // A char arrived while waiting for the TX buffer to be empty - Receive and process it!
-
-            i = (ring_buffer_pos_t)(h + 1) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
-
-            // Read the character from the USART
-            c = R_UDR;
-
-            if (Cfg::EMERGENCYPARSER) emergency_parser.update(emergency_state, c);
-
-            // If the character is to be stored at the index just before the tail
-            // (such that the head would advance to the current tail), the FIFO is
-            // full, so don't write the character or advance the head.
-            if (i != t) {
-              rx_buffer.buffer[h] = c;
-              h = i;
-            }
-            else if (Cfg::DROPPED_RX && !++rx_dropped_bytes)
-              --rx_dropped_bytes;
-          }
-          sw_barrier();
-        }
-
-        R_UDR = XOFF_CHAR;
-
-        // Clear the TXC bit -- "can be cleared by writing a one to its bit
-        // location". This makes sure flush() won't return until the bytes
-        // actually got written
-        B_TXC = 1;
-
-        // At this point there could be a race condition between the write() function
-        // and this sending of the XOFF char. This interrupt could happen between the
-        // wait to be empty TX buffer loop and the actual write of the character. Since
-        // the TX buffer is full because it's sending the XOFF char, the only way to be
-        // sure the write() function will succeed is to wait for the XOFF char to be
-        // completely sent. Since an extra character could be received during the wait
-        // it must also be handled!
-        while (!B_UDRE) {
-
-          if (B_RXC) {
-            // A char arrived while waiting for the TX buffer to be empty - Receive and process it!
-
-            i = (ring_buffer_pos_t)(h + 1) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
-
-            // Read the character from the USART
-            c = R_UDR;
-
-            if (Cfg::EMERGENCYPARSER)
-              emergency_parser.update(emergency_state, c);
-
-            // If the character is to be stored at the index just before the tail
-            // (such that the head would advance to the current tail), the FIFO is
-            // full, so don't write the character or advance the head.
-            if (i != t) {
-              rx_buffer.buffer[h] = c;
-              h = i;
-            }
-            else if (Cfg::DROPPED_RX && !++rx_dropped_bytes)
-              --rx_dropped_bytes;
-          }
-          sw_barrier();
-        }
-
-        // At this point everything is ready. The write() function won't
-        // have any issues writing to the UART TX register if it needs to!
-      }
-    }
-  }
-
-  // Store the new head value - The main loop will retry until the value is stable
-  rx_buffer.head = h;
-}
-
-// (called with TX irqs disabled)
-template<typename Cfg>
-FORCE_INLINE void MarlinSerial<Cfg>::_tx_udr_empty_irq() {
-  if (Cfg::TX_SIZE > 0) {
-    // Read positions
-    uint8_t t = tx_buffer.tail;
-    const uint8_t h = tx_buffer.head;
-
-    if (Cfg::XONOFF) {
-      // If an XON char is pending to be sent, do it now
-      if (xon_xoff_state == XON_CHAR) {
-
-        // Send the character
-        R_UDR = XON_CHAR;
-
-        // clear the TXC bit -- "can be cleared by writing a one to its bit
-        // location". This makes sure flush() won't return until the bytes
-        // actually got written
-        B_TXC = 1;
-
-        // Remember we sent it.
-        xon_xoff_state = XON_CHAR | XON_XOFF_CHAR_SENT;
-
-        // If nothing else to transmit, just disable TX interrupts.
-        if (h == t) B_UDRIE = 0; // (Non-atomic, could be reenabled by the main program, but eventually this will succeed)
-
-        return;
-      }
-    }
-
-    // If nothing to transmit, just disable TX interrupts. This could
-    // happen as the result of the non atomicity of the disabling of RX
-    // interrupts that could end reenabling TX interrupts as a side effect.
-    if (h == t) {
-      B_UDRIE = 0; // (Non-atomic, could be reenabled by the main program, but eventually this will succeed)
-      return;
-    }
-
-    // There is something to TX, Send the next byte
-    const uint8_t c = tx_buffer.buffer[t];
-    t = (t + 1) & (Cfg::TX_SIZE - 1);
-    R_UDR = c;
-    tx_buffer.tail = t;
-
-    // Clear the TXC bit (by writing a one to its bit location).
-    // Ensures flush() won't return until the bytes are actually written/
-    B_TXC = 1;
-
-    // Disable interrupts if there is nothing to transmit following this byte
-    if (h == t) B_UDRIE = 0; // (Non-atomic, could be reenabled by the main program, but eventually this will succeed)
-  }
-}
-
-// Public Methods
-template<typename Cfg>
-void MarlinSerial<Cfg>::begin(const long baud) {
-  uint16_t baud_setting;
-  bool useU2X = true;
-
-  #if F_CPU == 16000000UL && SERIAL_PORT == 0
-    // Hard-coded exception for compatibility with the bootloader shipped
-    // with the Duemilanove and previous boards, and the firmware on the
-    // 8U2 on the Uno and Mega 2560.
-    if (baud == 57600) useU2X = false;
-  #endif
-
-  R_UCSRA = 0;
-  if (useU2X) {
-    B_U2X = 1;
-    baud_setting = (F_CPU / 4 / baud - 1) / 2;
-  }
-  else
-    baud_setting = (F_CPU / 8 / baud - 1) / 2;
-
-  // assign the baud_setting, a.k.a. ubbr (USART Baud Rate Register)
-  R_UBRRH = baud_setting >> 8;
-  R_UBRRL = baud_setting;
-
-  B_RXEN = 1;
-  B_TXEN = 1;
-  B_RXCIE = 1;
-  if (Cfg::TX_SIZE > 0) B_UDRIE = 0;
-  _written = false;
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::end() {
-  B_RXEN = 0;
-  B_TXEN = 0;
-  B_RXCIE = 0;
-  B_UDRIE = 0;
-}
-
-template<typename Cfg>
-int MarlinSerial<Cfg>::peek() {
-  const ring_buffer_pos_t h = atomic_read_rx_head(), t = rx_buffer.tail;
-  return h == t ? -1 : rx_buffer.buffer[t];
-}
-
-template<typename Cfg>
-int MarlinSerial<Cfg>::read() {
-  const ring_buffer_pos_t h = atomic_read_rx_head();
-
-  // Read the tail. Main thread owns it, so it is safe to directly read it
-  ring_buffer_pos_t t = rx_buffer.tail;
-
-  // If nothing to read, return now
-  if (h == t) return -1;
-
-  // Get the next char
-  const int v = rx_buffer.buffer[t];
-  t = (ring_buffer_pos_t)(t + 1) & (Cfg::RX_SIZE - 1);
-
-  // Advance tail - Making sure the RX ISR will always get an stable value, even
-  // if it interrupts the writing of the value of that variable in the middle.
-  atomic_set_rx_tail(t);
-
-  if (Cfg::XONOFF) {
-    // If the XOFF char was sent, or about to be sent...
-    if ((xon_xoff_state & XON_XOFF_CHAR_MASK) == XOFF_CHAR) {
-      // Get count of bytes in the RX buffer
-      const ring_buffer_pos_t rx_count = (ring_buffer_pos_t)(h - t) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
-      if (rx_count < (Cfg::RX_SIZE) / 10) {
-        if (Cfg::TX_SIZE > 0) {
-          // Signal we want an XON character to be sent.
-          xon_xoff_state = XON_CHAR;
-          // Enable TX ISR. Non atomic, but it will eventually enable them
-          B_UDRIE = 1;
-        }
-        else {
-          // If not using TX interrupts, we must send the XON char now
-          xon_xoff_state = XON_CHAR | XON_XOFF_CHAR_SENT;
-          while (!B_UDRE) sw_barrier();
-          R_UDR = XON_CHAR;
-        }
-      }
-    }
-  }
-
-  return v;
-}
-
-template<typename Cfg>
-typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::available() {
-  const ring_buffer_pos_t h = atomic_read_rx_head(), t = rx_buffer.tail;
-  return (ring_buffer_pos_t)(Cfg::RX_SIZE + h - t) & (Cfg::RX_SIZE - 1);
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::flush() {
-
-  // Set the tail to the head:
-  //  - Read the RX head index in a safe way. (See atomic_read_rx_head.)
-  //  - Set the tail, making sure the RX ISR will always get a stable value, even
-  //    if it interrupts the writing of the value of that variable in the middle.
-  atomic_set_rx_tail(atomic_read_rx_head());
-
-  if (Cfg::XONOFF) {
-    // If the XOFF char was sent, or about to be sent...
-    if ((xon_xoff_state & XON_XOFF_CHAR_MASK) == XOFF_CHAR) {
-      if (Cfg::TX_SIZE > 0) {
-        // Signal we want an XON character to be sent.
-        xon_xoff_state = XON_CHAR;
-        // Enable TX ISR. Non atomic, but it will eventually enable it.
-        B_UDRIE = 1;
-      }
-      else {
-        // If not using TX interrupts, we must send the XON char now
-        xon_xoff_state = XON_CHAR | XON_XOFF_CHAR_SENT;
-        while (!B_UDRE) sw_barrier();
-        R_UDR = XON_CHAR;
-      }
-    }
-  }
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::write(const uint8_t c) {
-  if (Cfg::TX_SIZE == 0) {
-
-    _written = true;
-    while (!B_UDRE) sw_barrier();
-    R_UDR = c;
-
-  }
-  else {
-
-    _written = true;
-
-    // If the TX interrupts are disabled and the data register
-    // is empty, just write the byte to the data register and
-    // be done. This shortcut helps significantly improve the
-    // effective datarate at high (>500kbit/s) bitrates, where
-    // interrupt overhead becomes a slowdown.
-    // Yes, there is a race condition between the sending of the
-    // XOFF char at the RX ISR, but it is properly handled there
-    if (!B_UDRIE && B_UDRE) {
-      R_UDR = c;
-
-      // clear the TXC bit -- "can be cleared by writing a one to its bit
-      // location". This makes sure flush() won't return until the bytes
-      // actually got written
-      B_TXC = 1;
-      return;
-    }
-
-    const uint8_t i = (tx_buffer.head + 1) & (Cfg::TX_SIZE - 1);
-
-    // If global interrupts are disabled (as the result of being called from an ISR)...
-    if (!hal.isr_state()) {
-
-      // Make room by polling if it is possible to transmit, and do so!
-      while (i == tx_buffer.tail) {
-
-        // If we can transmit another byte, do it.
-        if (B_UDRE) _tx_udr_empty_irq();
-
-        // Make sure compiler rereads tx_buffer.tail
-        sw_barrier();
-      }
-    }
-    else {
-      // Interrupts are enabled, just wait until there is space
-      while (i == tx_buffer.tail) sw_barrier();
-    }
-
-    // Store new char. head is always safe to move
-    tx_buffer.buffer[tx_buffer.head] = c;
-    tx_buffer.head = i;
-
-    // Enable TX ISR - Non atomic, but it will eventually enable TX ISR
-    B_UDRIE = 1;
-  }
-}
-
-template<typename Cfg>
-void MarlinSerial<Cfg>::flushTX() {
-
-  if (Cfg::TX_SIZE == 0) {
-    // No bytes written, no need to flush. This special case is needed since there's
-    // no way to force the TXC (transmit complete) bit to 1 during initialization.
-    if (!_written) return;
-
-    // Wait until everything was transmitted
-    while (!B_TXC) sw_barrier();
-
-    // At this point nothing is queued anymore (DRIE is disabled) and
-    // the hardware finished transmission (TXC is set).
-
-  }
-  else {
-
-    // No bytes written, no need to flush. This special case is needed since there's
-    // no way to force the TXC (transmit complete) bit to 1 during initialization.
-    if (!_written) return;
-
-    // If global interrupts are disabled (as the result of being called from an ISR)...
-    if (!hal.isr_state()) {
-
-      // Wait until everything was transmitted - We must do polling, as interrupts are disabled
-      while (tx_buffer.head != tx_buffer.tail || !B_TXC) {
-
-        // If there is more space, send an extra character
-        if (B_UDRE) _tx_udr_empty_irq();
-
-        sw_barrier();
-      }
-
-    }
-    else {
-      // Wait until everything was transmitted
-      while (tx_buffer.head != tx_buffer.tail || !B_TXC) sw_barrier();
-    }
-
-    // At this point nothing is queued anymore (DRIE is disabled) and
-    // the hardware finished transmission (TXC is set).
-  }
-}
-
-// Hookup ISR handlers
-ISR(SERIAL_REGNAME(USART, SERIAL_PORT, _RX_vect)) {
-  MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>::store_rxd_char();
-}
-
-ISR(SERIAL_REGNAME(USART, SERIAL_PORT, _UDRE_vect)) {
-  MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>::_tx_udr_empty_irq();
-}
-
-// Because of the template definition above, it's required to instantiate the template to have all methods generated
-template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT> >;
-MSerialT1 customizedSerial1(MSerialT1::HasEmergencyParser);
-
-#ifdef SERIAL_PORT_2
-
-  // Hookup ISR handlers
-  ISR(SERIAL_REGNAME(USART, SERIAL_PORT_2, _RX_vect)) {
-    MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>::store_rxd_char();
-  }
-
-  ISR(SERIAL_REGNAME(USART, SERIAL_PORT_2, _UDRE_vect)) {
-    MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>::_tx_udr_empty_irq();
-  }
-
-  template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT_2> >;
-  MSerialT2 customizedSerial2(MSerialT2::HasEmergencyParser);
-
-#endif // SERIAL_PORT_2
-
-#ifdef SERIAL_PORT_3
-
-  // Hookup ISR handlers
-  ISR(SERIAL_REGNAME(USART, SERIAL_PORT_3, _RX_vect)) {
-    MarlinSerial<MarlinSerialCfg<SERIAL_PORT_3>>::store_rxd_char();
-  }
-
-  ISR(SERIAL_REGNAME(USART, SERIAL_PORT_3, _UDRE_vect)) {
-    MarlinSerial<MarlinSerialCfg<SERIAL_PORT_3>>::_tx_udr_empty_irq();
-  }
-
-  template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT_3> >;
-  MSerialT3 customizedSerial3(MSerialT3::HasEmergencyParser);
-
-#endif // SERIAL_PORT_3
-
-#ifdef MMU2_SERIAL_PORT
-
-  ISR(SERIAL_REGNAME(USART, MMU2_SERIAL_PORT, _RX_vect)) {
-    MarlinSerial<MMU2SerialCfg<MMU2_SERIAL_PORT>>::store_rxd_char();
-  }
-
-  ISR(SERIAL_REGNAME(USART, MMU2_SERIAL_PORT, _UDRE_vect)) {
-    MarlinSerial<MMU2SerialCfg<MMU2_SERIAL_PORT>>::_tx_udr_empty_irq();
-  }
-
-  template class MarlinSerial< MMU2SerialCfg<MMU2_SERIAL_PORT> >;
-  MSerialMMU2 mmuSerial(MSerialMMU2::HasEmergencyParser);
-
-#endif // MMU2_SERIAL_PORT
-
-#ifdef LCD_SERIAL_PORT
-
-  ISR(SERIAL_REGNAME(USART, LCD_SERIAL_PORT, _RX_vect)) {
-    MarlinSerial<LCDSerialCfg<LCD_SERIAL_PORT>>::store_rxd_char();
-  }
-
-  ISR(SERIAL_REGNAME(USART, LCD_SERIAL_PORT, _UDRE_vect)) {
-    MarlinSerial<LCDSerialCfg<LCD_SERIAL_PORT>>::_tx_udr_empty_irq();
-  }
-
-  template class MarlinSerial< LCDSerialCfg<LCD_SERIAL_PORT> >;
-  MSerialLCD lcdSerial(MSerialLCD::HasEmergencyParser);
-
-  #if HAS_DGUS_LCD
-    template<typename Cfg>
-    typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::get_tx_buffer_free() {
-      const ring_buffer_pos_t t = tx_buffer.tail,  // next byte to send.
-                              h = tx_buffer.head;  // next pos for queue.
-      int ret = t - h - 1;
-      if (ret < 0) ret += Cfg::TX_SIZE + 1;
-      return ret;
-    }
-  #endif
-
-#endif // LCD_SERIAL_PORT
-
-#endif // !USBCON && (UBRRH || UBRR0H || UBRR1H || UBRR2H || UBRR3H)
-
-// For AT90USB targets use the UART for BT interfacing
-#if defined(USBCON) && ENABLED(BLUETOOTH)
-  MSerialBT bluetoothSerial(false);
-#endif
-
-#endif // __AVR__
--- a/Marlin/src/HAL/AVR/fast_pwm.cpp
+++ b/Marlin/src/HAL/AVR/fast_pwm.cpp
@@ -1,222 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#ifdef __AVR__
-
-#include "../../inc/MarlinConfig.h"
-
-struct Timer {
-  volatile uint8_t* TCCRnQ[3];  // max 3 TCCR registers per timer
-  volatile uint16_t* OCRnQ[3];  // max 3 OCR registers per timer
-  volatile uint16_t* ICRn;      // max 1 ICR register per timer
-  uint8_t n;                    // the timer number [0->5]
-  uint8_t q;                    // the timer output [0->2] (A->C)
-  bool isPWM;                   // True if pin is a "hardware timer"
-  bool isProtected;             // True if timer is protected
-};
-
-// Macros for the Timer structure
-#define _SET_WGMnQ(T, V) do{ \
-    *(T.TCCRnQ)[0] = (*(T.TCCRnQ)[0] & ~(0x3 << 0)) | (( int(V)       & 0x3) << 0); \
-    *(T.TCCRnQ)[1] = (*(T.TCCRnQ)[1] & ~(0x3 << 3)) | (((int(V) >> 2) & 0x3) << 3); \
-  }while(0)
-
-// Set TCCR CS bits
-#define _SET_CSn(T, V) (*(T.TCCRnQ)[1] = (*(T.TCCRnQ[1]) & ~(0x7 << 0)) | ((int(V) & 0x7) << 0))
-
-// Set TCCR COM bits
-#define _SET_COMnQ(T, Q, V) (*(T.TCCRnQ)[0] = (*(T.TCCRnQ)[0] & ~(0x3 << (6-2*(Q)))) | (int(V) << (6-2*(Q))))
-
-// Set OCRnQ register
-#define _SET_OCRnQ(T, Q, V) (*(T.OCRnQ)[Q] = int(V) & 0xFFFF)
-
-// Set ICRn register (one per timer)
-#define _SET_ICRn(T, V) (*(T.ICRn) = int(V) & 0xFFFF)
-
-/**
- * Return a Timer struct describing a pin's timer.
- */
-const Timer get_pwm_timer(const pin_t pin) {
-
-  uint8_t q = 0;
-
-  switch (digitalPinToTimer(pin)) {
-    #ifdef TCCR0A
-      IF_DISABLED(AVR_AT90USB1286_FAMILY, case TIMER0A:)
-    #endif
-    #ifdef TCCR1A
-      case TIMER1A: case TIMER1B:
-    #endif
-
-    break;    // Protect reserved timers (TIMER0 & TIMER1)
-
-    #ifdef TCCR0A
-      case TIMER0B:   // Protected timer, but allow setting the duty cycle on OCR0B for pin D4 only
-        return Timer({ { &TCCR0A, nullptr, nullptr }, { (uint16_t*)&OCR0A, (uint16_t*)&OCR0B, nullptr }, nullptr, 0, 1, true, true });
-    #endif
-
-    #if HAS_TCCR2
-      case TIMER2:
-        return Timer({ { &TCCR2, nullptr, nullptr }, { (uint16_t*)&OCR2, nullptr, nullptr }, nullptr, 2, 0, true, false });
-    #elif ENABLED(USE_OCR2A_AS_TOP)
-      case TIMER2A: break; // Protect TIMER2A since its OCR is used by TIMER2B
-      case TIMER2B:
-        return Timer({ { &TCCR2A, &TCCR2B, nullptr }, { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, nullptr }, nullptr, 2, 1, true, false });
-    #elif defined(TCCR2A)
-      case TIMER2B: ++q; case TIMER2A:
-        return Timer({ { &TCCR2A, &TCCR2B, nullptr }, { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, nullptr }, nullptr, 2, q, true, false });
-    #endif
-
-    #ifdef OCR3C
-      case TIMER3C: ++q; case TIMER3B: ++q; case TIMER3A:
-        return Timer({ { &TCCR3A, &TCCR3B, &TCCR3C }, { &OCR3A, &OCR3B, &OCR3C  }, &ICR3, 3, q, true, false });
-    #elif defined(OCR3B)
-      case TIMER3B: ++q; case TIMER3A:
-        return Timer({ { &TCCR3A, &TCCR3B, nullptr }, { &OCR3A, &OCR3B, nullptr }, &ICR3, 3, q, true, false });
-    #endif
-
-    #ifdef TCCR4A
-      case TIMER4C: ++q; case TIMER4B: ++q; case TIMER4A:
-        return Timer({ { &TCCR4A, &TCCR4B, &TCCR4C }, { &OCR4A, &OCR4B, &OCR4C }, &ICR4, 4, q, true, false });
-    #endif
-
-    #ifdef TCCR5A
-      case TIMER5C: ++q; case TIMER5B: ++q; case TIMER5A:
-        return Timer({ { &TCCR5A, &TCCR5B, &TCCR5C }, { &OCR5A, &OCR5B, &OCR5C }, &ICR5, 5, q, true, false });
-    #endif
-  }
-
-  return Timer();
-}
-
-void MarlinHAL::set_pwm_frequency(const pin_t pin, const uint16_t f_desired) {
-  const Timer timer = get_pwm_timer(pin);
-  if (timer.isProtected || !timer.isPWM) return; // Don't proceed if protected timer or not recognized
-
-  const bool is_timer2 = timer.n == 2;
-  const uint16_t maxtop = is_timer2 ? 0xFF : 0xFFFF;
-
-  uint16_t res = 0xFF;        // resolution (TOP value)
-  uint8_t j = CS_NONE;        // prescaler index
-  uint8_t wgm = WGM_PWM_PC_8; // waveform generation mode
-
-  // Calculating the prescaler and resolution to use to achieve closest frequency
-  if (f_desired != 0) {
-    constexpr uint16_t prescaler[] = { 1, 8, (32), 64, (128), 256, 1024 };  // (*) are Timer 2 only
-    uint16_t f = (F_CPU) / (2 * 1024 * maxtop) + 1;           // Start with the lowest non-zero frequency achievable (1 or 31)
-
-    LOOP_L_N(i, COUNT(prescaler)) {                           // Loop through all prescaler values
-      const uint16_t p = prescaler[i];
-      uint16_t res_fast_temp, res_pc_temp;
-      if (is_timer2) {
-        #if ENABLED(USE_OCR2A_AS_TOP)                         // No resolution calculation for TIMER2 unless enabled USE_OCR2A_AS_TOP
-          const uint16_t rft = (F_CPU) / (p * f_desired);
-          res_fast_temp = rft - 1;
-          res_pc_temp = rft / 2;
-        #else
-          res_fast_temp = res_pc_temp = maxtop;
-        #endif
-      }
-      else {
-        if (p == 32 || p == 128) continue;                    // Skip TIMER2 specific prescalers when not TIMER2
-        const uint16_t rft = (F_CPU) / (p * f_desired);
-        res_fast_temp = rft - 1;
-        res_pc_temp = rft / 2;
-      }
-
-      LIMIT(res_fast_temp, 1U, maxtop);
-      LIMIT(res_pc_temp, 1U, maxtop);
-
-      // Calculate frequencies of test prescaler and resolution values
-      const uint32_t f_diff      = _MAX(f, f_desired) - _MIN(f, f_desired),
-                     f_fast_temp = (F_CPU) / (p * (1 + res_fast_temp)),
-                     f_fast_diff = _MAX(f_fast_temp, f_desired) - _MIN(f_fast_temp, f_desired),
-                     f_pc_temp   = (F_CPU) / (2 * p * res_pc_temp),
-                     f_pc_diff   = _MAX(f_pc_temp, f_desired) - _MIN(f_pc_temp, f_desired);
-
-      if (f_fast_diff < f_diff && f_fast_diff <= f_pc_diff) { // FAST values are closest to desired f
-        // Set the Wave Generation Mode to FAST PWM
-        wgm = is_timer2 ? uint8_t(TERN(USE_OCR2A_AS_TOP, WGM2_FAST_PWM_OCR2A, WGM2_FAST_PWM)) : uint8_t(WGM_FAST_PWM_ICRn);
-        // Remember this combination
-        f = f_fast_temp; res = res_fast_temp; j = i + 1;
-      }
-      else if (f_pc_diff < f_diff) {                          // PHASE CORRECT values are closes to desired f
-        // Set the Wave Generation Mode to PWM PHASE CORRECT
-        wgm = is_timer2 ? uint8_t(TERN(USE_OCR2A_AS_TOP, WGM2_PWM_PC_OCR2A, WGM2_PWM_PC)) : uint8_t(WGM_PWM_PC_ICRn);
-        f = f_pc_temp; res = res_pc_temp; j = i + 1;
-      }
-    }
-  }
-
-  _SET_WGMnQ(timer, wgm);
-  _SET_CSn(timer, j);
-
-  if (is_timer2) {
-    TERN_(USE_OCR2A_AS_TOP, _SET_OCRnQ(timer, 0, res)); // Set OCR2A value (TOP) = res
-  }
-  else
-    _SET_ICRn(timer, res);                              // Set ICRn value (TOP) = res
-}
-
-void MarlinHAL::set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255*/, const bool invert/*=false*/) {
-  // If v is 0 or v_size (max), digitalWrite to LOW or HIGH.
-  // Note that digitalWrite also disables PWM output for us (sets COM bit to 0)
-  if (v == 0)
-    digitalWrite(pin, invert);
-  else if (v == v_size)
-    digitalWrite(pin, !invert);
-  else {
-    const Timer timer = get_pwm_timer(pin);
-    if (timer.isPWM) {
-      if (timer.n == 0) {
-        _SET_COMnQ(timer, timer.q, COM_CLEAR_SET);  // Only allow a TIMER0B select...
-        _SET_OCRnQ(timer, timer.q, v);              // ...and OCR0B duty update. For output pin D4 no frequency changes are permitted.
-      }
-      else if (!timer.isProtected) {
-        const uint16_t top = timer.n == 2 ? TERN(USE_OCR2A_AS_TOP, *timer.OCRnQ[0], 255) : *timer.ICRn;
-        _SET_COMnQ(timer, SUM_TERN(HAS_TCCR2, timer.q, timer.q == 2), COM_CLEAR_SET + invert);   // COM20 is on bit 4 of TCCR2, so +1 for q==2
-        _SET_OCRnQ(timer, timer.q, uint16_t(uint32_t(v) * top / v_size)); // Scale 8/16-bit v to top value
-      }
-    }
-    else
-      digitalWrite(pin, v < v_size / 2 ? LOW : HIGH);
-  }
-}
-
-void MarlinHAL::init_pwm_timers() {
-  // Init some timer frequencies to a default 1KHz
-  const pin_t pwm_pin[] = {
-    #ifdef __AVR_ATmega2560__
-      10, 5, 6, 46
-    #elif defined(__AVR_ATmega1280__)
-      12, 31
-    #elif defined(__AVR_ATmega644__) || defined(__AVR_ATmega1284__)
-      15, 6
-    #elif defined(__AVR_AT90USB1286__) || defined(__AVR_mega64) || defined(__AVR_mega128)
-      16, 24
-    #endif
-  };
-
-  LOOP_L_N(i, COUNT(pwm_pin))
-    set_pwm_frequency(pwm_pin[i], 1000);
-}
-
-#endif // __AVR__
--- a/Marlin/src/HAL/AVR/inc/SanityCheck.h
+++ b/Marlin/src/HAL/AVR/inc/SanityCheck.h
@@ -1,101 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#pragma once
-
-/**
- * Test AVR-specific configuration values for errors at compile-time.
- */
-
-/**
- * Check for common serial pin conflicts
- */
-#define CHECK_SERIAL_PIN(N) ( \
-     X_STOP_PIN == N || Y_STOP_PIN == N || Z_STOP_PIN == N \
-  || X_MIN_PIN  == N || Y_MIN_PIN  == N || Z_MIN_PIN  == N \
-  || X_MAX_PIN  == N || Y_MAX_PIN  == N || Z_MAX_PIN  == N \
-  || X_STEP_PIN == N || Y_STEP_PIN == N || Z_STEP_PIN == N \
-  || X_DIR_PIN  == N || Y_DIR_PIN  == N || Z_DIR_PIN  == N \
-  || X_ENA_PIN  == N || Y_ENA_PIN  == N || Z_ENA_PIN  == N \
-)
-#if CONF_SERIAL_IS(0) // D0-D1. No known conflicts.
-#endif
-#if CONF_SERIAL_IS(1) && (CHECK_SERIAL_PIN(18) || CHECK_SERIAL_PIN(19))
-  #error "Serial Port 1 pin D18 and/or D19 conflicts with another pin on the board."
-#endif
-#if CONF_SERIAL_IS(2) && (CHECK_SERIAL_PIN(16) || CHECK_SERIAL_PIN(17))
-  #error "Serial Port 2 pin D16 and/or D17 conflicts with another pin on the board."
-#endif
-#if CONF_SERIAL_IS(3) && (CHECK_SERIAL_PIN(14) || CHECK_SERIAL_PIN(15))
-  #error "Serial Port 3 pin D14 and/or D15 conflicts with another pin on the board."
-#endif
-#undef CHECK_SERIAL_PIN
-
-/**
- * Checks for FAST PWM
- */
-#if ALL(FAST_PWM_FAN, USE_OCR2A_AS_TOP, HAS_TCCR2)
-  #error "USE_OCR2A_AS_TOP does not apply to devices with a single output TIMER2."
-#endif
-
-/**
- * Checks for SOFT PWM
- */
-#if HAS_FAN0 && FAN_PIN == 9 && DISABLED(FAN_SOFT_PWM) && ENABLED(SPEAKER)
-  #error "FAN_PIN 9 Hardware PWM uses Timer 2 which conflicts with Arduino AVR Tone Timer (for SPEAKER)."
-  #error "Disable SPEAKER or enable FAN_SOFT_PWM."
-#endif
-
-/**
- * Sanity checks for Spindle / Laser PWM
- */
-#if ENABLED(SPINDLE_LASER_USE_PWM)
-  #include "../ServoTimers.h"   // Needed to check timer availability (_useTimer3)
-  #if SPINDLE_LASER_PWM_PIN == 4 || WITHIN(SPINDLE_LASER_PWM_PIN, 11, 13)
-    #error "Counter/Timer for SPINDLE_LASER_PWM_PIN is used by a system interrupt."
-  #elif NUM_SERVOS > 0 && defined(_useTimer3) && (WITHIN(SPINDLE_LASER_PWM_PIN, 2, 3) || SPINDLE_LASER_PWM_PIN == 5)
-    #error "Counter/Timer for SPINDLE_LASER_PWM_PIN is used by the servo system."
-  #endif
-#elif SPINDLE_LASER_FREQUENCY
-  #error "SPINDLE_LASER_FREQUENCY requires SPINDLE_LASER_USE_PWM."
-#endif
-
-/**
- * The Trinamic library includes SoftwareSerial.h, leading to a compile error.
- */
-#if BOTH(HAS_TRINAMIC_CONFIG, ENDSTOP_INTERRUPTS_FEATURE)
-  #error "TMCStepper includes SoftwareSerial.h which is incompatible with ENDSTOP_INTERRUPTS_FEATURE. Disable ENDSTOP_INTERRUPTS_FEATURE to continue."
-#endif
-
-#if BOTH(HAS_TMC_SW_SERIAL, MONITOR_DRIVER_STATUS)
-  #error "MONITOR_DRIVER_STATUS causes performance issues when used with SoftwareSerial-connected drivers. Disable MONITOR_DRIVER_STATUS or use hardware serial to continue."
-#endif
-
-/**
- * Postmortem debugging
- */
-#if ENABLED(POSTMORTEM_DEBUGGING)
-  #error "POSTMORTEM_DEBUGGING is not supported on AVR boards."
-#endif
-
-#if USING_PULLDOWNS
-  #error "PULLDOWN pin mode is not available on AVR boards."
-#endif
--- a/Marlin/src/HAL/DUE/HAL.h
+++ b/Marlin/src/HAL/DUE/HAL.h
@@ -1,233 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- *
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#pragma once
-
-/**
- * HAL for Arduino Due and compatible (SAM3X8E)
- */
-
-#define CPU_32_BIT
-
-#include "../shared/Marduino.h"
-#include "../shared/eeprom_if.h"
-#include "../shared/math_32bit.h"
-#include "../shared/HAL_SPI.h"
-#include "fastio.h"
-
-#include <stdint.h>
-
-#include "../../core/serial_hook.h"
-
-// ------------------------
-// Serial ports
-// ------------------------
-
-typedef ForwardSerial1Class< decltype(Serial) > DefaultSerial1;
-typedef ForwardSerial1Class< decltype(Serial1) > DefaultSerial2;
-typedef ForwardSerial1Class< decltype(Serial2) > DefaultSerial3;
-typedef ForwardSerial1Class< decltype(Serial3) > DefaultSerial4;
-extern DefaultSerial1 MSerial0;
-extern DefaultSerial2 MSerial1;
-extern DefaultSerial3 MSerial2;
-extern DefaultSerial4 MSerial3;
-
-#define _MSERIAL(X) MSerial##X
-#define MSERIAL(X) _MSERIAL(X)
-
-#if SERIAL_PORT == -1 || ENABLED(EMERGENCY_PARSER)
-  #define MYSERIAL1 customizedSerial1
-#elif WITHIN(SERIAL_PORT, 0, 3)
-  #define MYSERIAL1 MSERIAL(SERIAL_PORT)
-#else
-  #error "The required SERIAL_PORT must be from 0 to 3, or -1 for USB Serial."
-#endif
-
-#ifdef SERIAL_PORT_2
-  #if SERIAL_PORT_2 == -1 || ENABLED(EMERGENCY_PARSER)
-    #define MYSERIAL2 customizedSerial2
-  #elif WITHIN(SERIAL_PORT_2, 0, 3)
-    #define MYSERIAL2 MSERIAL(SERIAL_PORT_2)
-  #else
-    #error "SERIAL_PORT_2 must be from 0 to 3, or -1 for USB Serial."
-  #endif
-#endif
-
-#ifdef SERIAL_PORT_3
-  #if SERIAL_PORT_3 == -1 || ENABLED(EMERGENCY_PARSER)
-    #define MYSERIAL3 customizedSerial3
-  #elif WITHIN(SERIAL_PORT_3, 0, 3)
-    #define MYSERIAL3 MSERIAL(SERIAL_PORT_3)
-  #else
-    #error "SERIAL_PORT_3 must be from 0 to 3, or -1 for USB Serial."
-  #endif
-#endif
-
-#ifdef MMU2_SERIAL_PORT
-  #if WITHIN(MMU2_SERIAL_PORT, 0, 3)
-    #define MMU2_SERIAL MSERIAL(MMU2_SERIAL_PORT)
-  #else
-    #error "MMU2_SERIAL_PORT must be from 0 to 3."
-  #endif
-#endif
-
-#ifdef LCD_SERIAL_PORT
-  #if WITHIN(LCD_SERIAL_PORT, 0, 3)
-    #define LCD_SERIAL MSERIAL(LCD_SERIAL_PORT)
-  #else
-    #error "LCD_SERIAL_PORT must be from 0 to 3."
-  #endif
-#endif
-
-#include "MarlinSerial.h"
-#include "MarlinSerialUSB.h"
-
-// ------------------------
-// Types
-// ------------------------
-
-typedef int8_t pin_t;
-
-#define SHARED_SERVOS HAS_SERVOS  // Use shared/servos.cpp
-
-class Servo;
-typedef Servo hal_servo_t;
-
-//
-// Interrupts
-//
-#define sei() interrupts()
-#define cli() noInterrupts()
-
-#define CRITICAL_SECTION_START()  const bool _irqon = hal.isr_state(); hal.isr_off()
-#define CRITICAL_SECTION_END()    if (_irqon) hal.isr_on()
-
-//
-// ADC
-//
-#define HAL_ADC_VREF         3.3
-#define HAL_ADC_RESOLUTION  10
-
-#ifndef analogInputToDigitalPin
-  #define analogInputToDigitalPin(p) ((p < 12U) ? (p) + 54U : -1)
-#endif
-
-//
-// Pin Mapping for M42, M43, M226
-//
-#define GET_PIN_MAP_PIN(index) index
-#define GET_PIN_MAP_INDEX(pin) pin
-#define PARSED_PIN_INDEX(code, dval) parser.intval(code, dval)
-
-//
-// Tone
-//
-void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration=0);
-void noTone(const pin_t _pin);
-
-// ------------------------
-// Class Utilities
-// ------------------------
-
-#pragma GCC diagnostic push
-#if GCC_VERSION <= 50000
-  #pragma GCC diagnostic ignored "-Wunused-function"
-#endif
-
-#pragma GCC diagnostic pop
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-char *dtostrf(double __val, signed char __width, unsigned char __prec, char *__s);
-#ifdef __cplusplus
-  }
-#endif
-
-// Return free RAM between end of heap (or end bss) and whatever is current
-int freeMemory();
-
-// ------------------------
-// MarlinHAL Class
-// ------------------------
-
-class MarlinHAL {
-public:
-
-  // Earliest possible init, before setup()
-  MarlinHAL() {}
-
-  // Watchdog
-  static void watchdog_init()    IF_DISABLED(USE_WATCHDOG, {});
-  static void watchdog_refresh() IF_DISABLED(USE_WATCHDOG, {});
-
-  static void init();          // Called early in setup()
-  static void init_board();    // Called less early in setup()
-  static void reboot();        // Restart the firmware
-
-  // Interrupts
-  static bool isr_state() { return !__get_PRIMASK(); }
-  static void isr_on()  { __enable_irq(); }
-  static void isr_off() { __disable_irq(); }
-
-  static void delay_ms(const int ms) { delay(ms); }
-
-  // Tasks, called from idle()
-  static void idletask();
-
-  // Reset
-  static uint8_t get_reset_source();
-  static void clear_reset_source() {}
-
-  // Free SRAM
-  static int freeMemory() { return ::freeMemory(); }
-
-  //
-  // ADC Methods
-  //
-
-  static uint16_t adc_result;
-
-  // Called by Temperature::init once at startup
-  static void adc_init() {}
-
-  // Called by Temperature::init for each sensor at startup
-  static void adc_enable(const uint8_t ch) {}
-
-  // Begin ADC sampling on the given channel. Called from Temperature::isr!
-  static void adc_start(const uint8_t ch) { adc_result = analogRead(ch); }
-
-  // Is the ADC ready for reading?
-  static bool adc_ready() { return true; }
-
-  // The current value of the ADC register
-  static uint16_t adc_value() { return adc_result; }
-
-  /**
-   * Set the PWM duty cycle for the pin to the given value.
-   * No inverting the duty cycle in this HAL.
-   * No changing the maximum size of the provided value to enable finer PWM duty control in this HAL.
-   */
-  static void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t=255, const bool=false) {
-    analogWrite(pin, v);
-  }
-
-};
--- a/Marlin/src/HAL/DUE/MarlinSerialUSB.cpp
+++ b/Marlin/src/HAL/DUE/MarlinSerialUSB.cpp
@@ -1,142 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#ifdef ARDUINO_ARCH_SAM
-
-/**
- * MarlinSerial_Due.cpp - Hardware serial library for Arduino DUE
- * Copyright (c) 2017 Eduardo José Tagle. All right reserved
- * Based on MarlinSerial for AVR, copyright (c) 2006 Nicholas Zambetti.  All right reserved.
- */
-
-#include "../../inc/MarlinConfig.h"
-
-#if HAS_USB_SERIAL
-
-#include "MarlinSerialUSB.h"
-
-// Imports from Atmel USB Stack/CDC implementation
-extern "C" {
-  bool usb_task_cdc_isenabled();
-  bool usb_task_cdc_dtr_active();
-  bool udi_cdc_is_rx_ready();
-  int udi_cdc_getc();
-  bool udi_cdc_is_tx_ready();
-  int udi_cdc_putc(int value);
-}
-
-// Pending character
-static int pending_char = -1;
-
-// Public Methods
-void MarlinSerialUSB::begin(const long) {}
-
-void MarlinSerialUSB::end() {}
-
-int MarlinSerialUSB::peek() {
-  if (pending_char >= 0)
-    return pending_char;
-
-  // If USB CDC not enumerated or not configured on the PC side
-  if (!usb_task_cdc_isenabled())
-    return -1;
-
-  // If no bytes sent from the PC
-  if (!udi_cdc_is_rx_ready())
-    return -1;
-
-  pending_char = udi_cdc_getc();
-
-  TERN_(EMERGENCY_PARSER, emergency_parser.update(static_cast<MSerialT1*>(this)->emergency_state, (char)pending_char));
-
-  return pending_char;
-}
-
-int MarlinSerialUSB::read() {
-  if (pending_char >= 0) {
-    int ret = pending_char;
-    pending_char = -1;
-    return ret;
-  }
-
-  // If USB CDC not enumerated or not configured on the PC side
-  if (!usb_task_cdc_isenabled())
-    return -1;
-
-  // If no bytes sent from the PC
-  if (!udi_cdc_is_rx_ready())
-    return -1;
-
-  int c = udi_cdc_getc();
-
-  TERN_(EMERGENCY_PARSER, emergency_parser.update(static_cast<MSerialT1*>(this)->emergency_state, (char)c));
-
-  return c;
-}
-
-int MarlinSerialUSB::available() {
-  if (pending_char > 0) return pending_char;
-  return pending_char == 0 ||
-    // or USB CDC enumerated and configured on the PC side and some bytes where sent to us */
-    (usb_task_cdc_isenabled() && udi_cdc_is_rx_ready());
-}
-
-void MarlinSerialUSB::flush() { }
-
-size_t MarlinSerialUSB::write(const uint8_t c) {
-
-  /* Do not even bother sending anything if USB CDC is not enumerated
-     or not configured on the PC side or there is no program on the PC
-     listening to our messages */
-  if (!usb_task_cdc_isenabled() || !usb_task_cdc_dtr_active())
-    return 0;
-
-  /* Wait until the PC has read the pending to be sent data */
-  while (usb_task_cdc_isenabled() &&
-         usb_task_cdc_dtr_active() &&
-        !udi_cdc_is_tx_ready()) {
-  };
-
-  /* Do not even bother sending anything if USB CDC is not enumerated
-     or not configured on the PC side or there is no program on the PC
-     listening to our messages at this point */
-  if (!usb_task_cdc_isenabled() || !usb_task_cdc_dtr_active())
-    return 0;
-
-  // Fifo full
-  //  udi_cdc_signal_overrun();
-  udi_cdc_putc(c);
-  return 1;
-}
-
-// Preinstantiate
-#if SERIAL_PORT == -1
-  MSerialT1 customizedSerial1(TERN0(EMERGENCY_PARSER, true));
-#endif
-#if SERIAL_PORT_2 == -1
-  MSerialT2 customizedSerial2(TERN0(EMERGENCY_PARSER, true));
-#endif
-#if SERIAL_PORT_3 == -1
-  MSerialT3 customizedSerial3(TERN0(EMERGENCY_PARSER, true));
-#endif
-
-#endif // HAS_USB_SERIAL
-#endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/DUE/MarlinSerialUSB.h
+++ b/Marlin/src/HAL/DUE/MarlinSerialUSB.h
@@ -1,65 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#pragma once
-
-/**
- * MarlinSerialUSB_Due.h - Hardware Serial over USB (CDC) library for Arduino DUE
- * Copyright (c) 2017 Eduardo José Tagle. All right reserved
- */
-
-#include "../../inc/MarlinConfig.h"
-#include "../../core/serial_hook.h"
-
-#include <WString.h>
-
-struct MarlinSerialUSB {
-  void begin(const long);
-  void end();
-  int peek();
-  int read();
-  void flush();
-  int available();
-  size_t write(const uint8_t c);
-
-  #if ENABLED(SERIAL_STATS_DROPPED_RX)
-    FORCE_INLINE uint32_t dropped() { return 0; }
-  #endif
-
-  #if ENABLED(SERIAL_STATS_MAX_RX_QUEUED)
-    FORCE_INLINE int rxMaxEnqueued() { return 0; }
-  #endif
-};
-
-#if SERIAL_PORT == -1
-  typedef Serial1Class<MarlinSerialUSB> MSerialT1;
-  extern MSerialT1 customizedSerial1;
-#endif
-
-#if SERIAL_PORT_2 == -1
-  typedef Serial1Class<MarlinSerialUSB> MSerialT2;
-  extern MSerialT2 customizedSerial2;
-#endif
-
-#if SERIAL_PORT_3 == -1
-  typedef Serial1Class<MarlinSerialUSB> MSerialT3;
-  extern MSerialT3 customizedSerial3;
-#endif
--- a/Marlin/src/HAL/DUE/MinSerial.cpp
+++ b/Marlin/src/HAL/DUE/MinSerial.cpp
@@ -1,91 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#ifdef ARDUINO_ARCH_SAM
-
-#include "../../inc/MarlinConfigPre.h"
-
-#if ENABLED(POSTMORTEM_DEBUGGING)
-
-#include "../shared/MinSerial.h"
-
-#include <stdarg.h>
-
-static void TXBegin() {
-  // Disable UART interrupt in NVIC
-  NVIC_DisableIRQ( UART_IRQn );
-
-  // We NEED memory barriers to ensure Interrupts are actually disabled!
-  // ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
-  __DSB();
-  __ISB();
-
-  // Disable clock
-  pmc_disable_periph_clk( ID_UART );
-
-  // Configure PMC
-  pmc_enable_periph_clk( ID_UART );
-
-  // Disable PDC channel
-  UART->UART_PTCR = UART_PTCR_RXTDIS | UART_PTCR_TXTDIS;
-
-  // Reset and disable receiver and transmitter
-  UART->UART_CR = UART_CR_RSTRX | UART_CR_RSTTX | UART_CR_RXDIS | UART_CR_TXDIS;
-
-  // Configure mode: 8bit, No parity, 1 bit stop
-  UART->UART_MR = UART_MR_CHMODE_NORMAL | US_MR_CHRL_8_BIT | US_MR_NBSTOP_1_BIT | UART_MR_PAR_NO;
-
-  // Configure baudrate (asynchronous, no oversampling) to BAUDRATE bauds
-  UART->UART_BRGR = (SystemCoreClock / (BAUDRATE << 4));
-
-  // Enable receiver and transmitter
-  UART->UART_CR = UART_CR_RXEN | UART_CR_TXEN;
-}
-
-// A SW memory barrier, to ensure GCC does not overoptimize loops
-#define sw_barrier() __asm__ volatile("": : :"memory");
-static void TX(char c) {
-  while (!(UART->UART_SR & UART_SR_TXRDY)) { WDT_Restart(WDT); sw_barrier(); };
-  UART->UART_THR = c;
-}
-
-void install_min_serial() {
-  HAL_min_serial_init = &TXBegin;
-  HAL_min_serial_out = &TX;
-}
-
-#if DISABLED(DYNAMIC_VECTORTABLE)
-extern "C" {
-  __attribute__((naked)) void JumpHandler_ASM() {
-    __asm__ __volatile__ (
-      "b CommonHandler_ASM\n"
-    );
-  }
-  void __attribute__((naked, alias("JumpHandler_ASM"))) HardFault_Handler();
-  void __attribute__((naked, alias("JumpHandler_ASM"))) BusFault_Handler();
-  void __attribute__((naked, alias("JumpHandler_ASM"))) UsageFault_Handler();
-  void __attribute__((naked, alias("JumpHandler_ASM"))) MemManage_Handler();
-  void __attribute__((naked, alias("JumpHandler_ASM"))) NMI_Handler();
-}
-#endif
-
-#endif // POSTMORTEM_DEBUGGING
-#endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/DUE/fastio/G2_PWM.cpp
+++ b/Marlin/src/HAL/DUE/fastio/G2_PWM.cpp
@@ -1,206 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-
-/**
- * The PWM module is only used to generate interrupts at specified times. It
- * is NOT used to directly toggle pins. The ISR writes to the pin assigned to
- * that interrupt.
- *
- * All PWMs use the same repetition rate.  The G2 needs about 10kHz min in order to
- * not have obvious ripple on the Vref signals.
- *
- * The data structures are setup to minimize the computation done by the ISR which
- * minimizes ISR execution time.  Execution times are 0.8 to 1.1 microseconds.
- *
- * FIve PWM interrupt sources are used.  Channel 0 sets the base period.  All Vref
- * signals are set active when this counter overflows and resets to zero.  The compare
- * values in channels 1-4 are set to give the desired duty cycle for that Vref pin.
- * When counter 0 matches the compare value then that channel generates an interrupt.
- * The ISR checks the source of the interrupt and sets the corresponding pin inactive.
- *
- * Some jitter in the Vref signal is OK so the interrupt priority is left at its default value.
- */
-
-#include "../../../inc/MarlinConfig.h"
-
-#if MB(PRINTRBOARD_G2)
-
-#include "G2_PWM.h"
-
-#if PIN_EXISTS(MOTOR_CURRENT_PWM_X)
-  #define G2_PWM_X 1
-#else
-  #define G2_PWM_X 0
-#endif
-#if PIN_EXISTS(MOTOR_CURRENT_PWM_Y)
-  #define G2_PWM_Y 1
-#else
-  #define G2_PWM_Y 0
-#endif
-#if PIN_EXISTS(MOTOR_CURRENT_PWM_Z)
-  #define G2_PWM_Z 1
-#else
-  #define G2_PWM_Z 0
-#endif
-#if PIN_EXISTS(MOTOR_CURRENT_PWM_E)
-  #define G2_PWM_E 1
-#else
-  #define G2_PWM_E 0
-#endif
-#define G2_MASK_X(V) (G2_PWM_X * (V))
-#define G2_MASK_Y(V) (G2_PWM_Y * (V))
-#define G2_MASK_Z(V) (G2_PWM_Z * (V))
-#define G2_MASK_E(V) (G2_PWM_E * (V))
-
-volatile uint32_t *SODR_A = &PIOA->PIO_SODR,
-                  *SODR_B = &PIOB->PIO_SODR,
-                  *CODR_A = &PIOA->PIO_CODR,
-                  *CODR_B = &PIOB->PIO_CODR;
-
-PWM_map ISR_table[NUM_PWMS] = PWM_MAP_INIT;
-
-void Stepper::digipot_init() {
-
-  #if PIN_EXISTS(MOTOR_CURRENT_PWM_X)
-    OUT_WRITE(MOTOR_CURRENT_PWM_X_PIN, 0);  // init pins
-  #endif
-  #if PIN_EXISTS(MOTOR_CURRENT_PWM_Y)
-    OUT_WRITE(MOTOR_CURRENT_PWM_Y_PIN, 0);
-  #endif
-  #if G2_PWM_Z
-    OUT_WRITE(MOTOR_CURRENT_PWM_Z_PIN, 0);
-  #endif
-  #if G2_PWM_E
-    OUT_WRITE(MOTOR_CURRENT_PWM_E_PIN, 0);
-  #endif
-
-  #define WPKEY          (0x50574D << 8) // “PWM” in ASCII
-  #define WPCMD_DIS_SW   0  // command to disable Write Protect SW
-  #define WPRG_ALL       (PWM_WPCR_WPRG0 | PWM_WPCR_WPRG1 | PWM_WPCR_WPRG2 | PWM_WPCR_WPRG3 | PWM_WPCR_WPRG4 | PWM_WPCR_WPRG5)  // all Write Protect Groups
-
-  #define PWM_CLOCK_F    F_CPU / 1000000UL   // set clock to 1MHz
-
-  PMC->PMC_PCER1 = PMC_PCER1_PID36;                       // enable PWM controller clock (disabled on power up)
-
-  PWM->PWM_WPCR = WPKEY | WPRG_ALL | WPCMD_DIS_SW;        // enable setting of all PWM registers
-  PWM->PWM_CLK = PWM_CLOCK_F;                             // enable CLK_A and set it to 1MHz, leave CLK_B disabled
-  PWM->PWM_CH_NUM[0].PWM_CMR = 0b1011;                    // set channel 0 to Clock A input & to left aligned
-  if (G2_PWM_X) PWM->PWM_CH_NUM[1].PWM_CMR = 0b1011;      // set channel 1 to Clock A input & to left aligned
-  if (G2_PWM_Y) PWM->PWM_CH_NUM[2].PWM_CMR = 0b1011;      // set channel 2 to Clock A input & to left aligned
-  if (G2_PWM_Z) PWM->PWM_CH_NUM[3].PWM_CMR = 0b1011;      // set channel 3 to Clock A input & to left aligned
-  if (G2_PWM_E) PWM->PWM_CH_NUM[4].PWM_CMR = 0b1011;      // set channel 4 to Clock A input & to left aligned
-
-  PWM->PWM_CH_NUM[0].PWM_CPRD = PWM_PERIOD_US;            // set channel 0 Period
-
-  PWM->PWM_IER2 = PWM_IER1_CHID0;                         // generate interrupt when counter0 overflows
-  PWM->PWM_IER2 = PWM_IER2_CMPM0
-    | G2_MASK_X(PWM_IER2_CMPM1)
-    | G2_MASK_Y(PWM_IER2_CMPM2)
-    | G2_MASK_Z(PWM_IER2_CMPM3)
-    | G2_MASK_E(PWM_IER2_CMPM4)
-  ; // generate interrupt on compare event
-
-  if (G2_PWM_X) PWM->PWM_CMP[1].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[0])); // interrupt when counter0 == CMPV - used to set Motor 1 PWM inactive
-  if (G2_PWM_Y) PWM->PWM_CMP[2].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[0])); // interrupt when counter0 == CMPV - used to set Motor 2 PWM inactive
-  if (G2_PWM_Z) PWM->PWM_CMP[3].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[1])); // interrupt when counter0 == CMPV - used to set Motor 3 PWM inactive
-  if (G2_PWM_E) PWM->PWM_CMP[4].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[2])); // interrupt when counter0 == CMPV - used to set Motor 4 PWM inactive
-
-  if (G2_PWM_X) PWM->PWM_CMP[1].PWM_CMPM = 0x0001;  // enable compare event
-  if (G2_PWM_Y) PWM->PWM_CMP[2].PWM_CMPM = 0x0001;  // enable compare event
-  if (G2_PWM_Z) PWM->PWM_CMP[3].PWM_CMPM = 0x0001;  // enable compare event
-  if (G2_PWM_E) PWM->PWM_CMP[4].PWM_CMPM = 0x0001;  // enable compare event
-
-  PWM->PWM_SCM = PWM_SCM_UPDM_MODE0 | PWM_SCM_SYNC0
-    | G2_MASK_X(PWM_SCM_SYNC1)
-    | G2_MASK_Y(PWM_SCM_SYNC2)
-    | G2_MASK_Z(PWM_SCM_SYNC3)
-    | G2_MASK_E(PWM_SCM_SYNC4)
-  ; // sync 1-4 with 0, use mode 0 for updates
-
-  PWM->PWM_ENA = PWM_ENA_CHID0
-    | G2_MASK_X(PWM_ENA_CHID1)
-    | G2_MASK_Y(PWM_ENA_CHID2)
-    | G2_MASK_Z(PWM_ENA_CHID3)
-    | G2_MASK_E(PWM_ENA_CHID4)
-  ; // enable channels used by G2
-
-  PWM->PWM_IER1 = PWM_IER1_CHID0
-    | G2_MASK_X(PWM_IER1_CHID1)
-    | G2_MASK_Y(PWM_IER1_CHID2)
-    | G2_MASK_Z(PWM_IER1_CHID3)
-    | G2_MASK_E(PWM_IER1_CHID4)
-  ; // enable interrupts for channels used by G2
-
-  NVIC_EnableIRQ(PWM_IRQn);     // Enable interrupt handler
-  NVIC_SetPriority(PWM_IRQn, NVIC_EncodePriority(0, 10, 0));  // normal priority for PWM module (can stand some jitter on the Vref signals)
-}
-
-void Stepper::set_digipot_current(const uint8_t driver, const int16_t current) {
-
-  if (!(PWM->PWM_CH_NUM[0].PWM_CPRD == PWM_PERIOD_US)) digipot_init();  // Init PWM system if needed
-
-  switch (driver) {
-    case 0:
-      if (G2_PWM_X) PWM->PWM_CMP[1].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update X & Y
-      if (G2_PWM_Y) PWM->PWM_CMP[2].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));
-      if (G2_PWM_X) PWM->PWM_CMP[1].PWM_CMPMUPD = 0x0001;  // enable compare event
-      if (G2_PWM_Y) PWM->PWM_CMP[2].PWM_CMPMUPD = 0x0001;  // enable compare event
-      if (G2_PWM_X || G2_PWM_Y) PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
-      break;
-    case 1:
-      if (G2_PWM_Z) {
-        PWM->PWM_CMP[3].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update Z
-        PWM->PWM_CMP[3].PWM_CMPMUPD = 0x0001;  // enable compare event
-        PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
-      }
-      break;
-    default:
-      if (G2_PWM_E) {
-        PWM->PWM_CMP[4].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update E
-        PWM->PWM_CMP[4].PWM_CMPMUPD = 0x0001;  // enable compare event
-        PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
-      }
-      break;
-  }
-}
-
-volatile uint32_t PWM_ISR1_STATUS, PWM_ISR2_STATUS;
-
-void PWM_Handler() {
-  PWM_ISR1_STATUS = PWM->PWM_ISR1;
-  PWM_ISR2_STATUS = PWM->PWM_ISR2;
-  if (PWM_ISR1_STATUS & PWM_IER1_CHID0) {                                                         // CHAN_0 interrupt
-    if (G2_PWM_X) *ISR_table[0].set_register = ISR_table[0].write_mask;                           // set X to active
-    if (G2_PWM_Y) *ISR_table[1].set_register = ISR_table[1].write_mask;                           // set Y to active
-    if (G2_PWM_Z) *ISR_table[2].set_register = ISR_table[2].write_mask;                           // set Z to active
-    if (G2_PWM_E) *ISR_table[3].set_register = ISR_table[3].write_mask;                           // set E to active
-  }
-  else {
-    if (G2_PWM_X && (PWM_ISR2_STATUS & PWM_IER2_CMPM1)) *ISR_table[0].clr_register = ISR_table[0].write_mask; // set X to inactive
-    if (G2_PWM_Y && (PWM_ISR2_STATUS & PWM_IER2_CMPM2)) *ISR_table[1].clr_register = ISR_table[1].write_mask; // set Y to inactive
-    if (G2_PWM_Z && (PWM_ISR2_STATUS & PWM_IER2_CMPM3)) *ISR_table[2].clr_register = ISR_table[2].write_mask; // set Z to inactive
-    if (G2_PWM_E && (PWM_ISR2_STATUS & PWM_IER2_CMPM4)) *ISR_table[3].clr_register = ISR_table[3].write_mask; // set E to inactive
-  }
-  return;
-}
-
-#endif // PRINTRBOARD_G2
--- a/Marlin/src/HAL/DUE/inc/Conditionals_LCD.h
+++ b/Marlin/src/HAL/DUE/inc/Conditionals_LCD.h
@@ -1,26 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#pragma once
-
-#if HAS_SPI_TFT || HAS_FSMC_TFT
-  #error "Sorry! TFT displays are not available for HAL/DUE."
-#endif
--- a/Marlin/src/HAL/DUE/upload_extra_script.py
+++ b/Marlin/src/HAL/DUE/upload_extra_script.py
@@ -1,19 +0,0 @@
-#
-# Set upload_command
-#
-#  Windows: bossac.exe
-#  Other: leave unchanged
-#
-import pioutil
-if pioutil.is_pio_build():
-	import platform
-	current_OS = platform.system()
-
-	if current_OS == 'Windows':
-
-		Import("env")
-
-		# Use bossac.exe on Windows
-		env.Replace(
-			UPLOADCMD="bossac --info --unlock --write --verify --reset --erase -U false --boot $SOURCE"
-		)
--- a/Marlin/src/HAL/ESP32/HAL.cpp
+++ b/Marlin/src/HAL/ESP32/HAL.cpp
@@ -1,403 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#ifdef ARDUINO_ARCH_ESP32
-
-#include "../../inc/MarlinConfig.h"
-
-#include <rom/rtc.h>
-#include <driver/adc.h>
-#include <esp_adc_cal.h>
-#include <HardwareSerial.h>
-
-#if ENABLED(USE_ESP32_TASK_WDT)
-  #include <esp_task_wdt.h>
-#endif
-
-#if ENABLED(WIFISUPPORT)
-  #include <ESPAsyncWebServer.h>
-  #include "wifi.h"
-  #if ENABLED(OTASUPPORT)
-    #include "ota.h"
-  #endif
-  #if ENABLED(WEBSUPPORT)
-    #include "spiffs.h"
-    #include "web.h"
-  #endif
-#endif
-
-#if ENABLED(ESP3D_WIFISUPPORT)
-  DefaultSerial1 MSerial0(false, Serial2Socket);
-#endif
-
-// ------------------------
-// Externs
-// ------------------------
-
-portMUX_TYPE MarlinHAL::spinlock = portMUX_INITIALIZER_UNLOCKED;
-
-// ------------------------
-// Local defines
-// ------------------------
-
-#define V_REF 1100
-
-// ------------------------
-// Public Variables
-// ------------------------
-
-uint16_t MarlinHAL::adc_result;
-
-// ------------------------
-// Private Variables
-// ------------------------
-
-esp_adc_cal_characteristics_t characteristics[ADC_ATTEN_MAX];
-adc_atten_t attenuations[ADC1_CHANNEL_MAX] = {};
-uint32_t thresholds[ADC_ATTEN_MAX];
-
-volatile int numPWMUsed = 0;
-volatile struct { pin_t pin; int value; } pwmState[MAX_PWM_PINS];
-
-pin_t chan_pin[CHANNEL_MAX_NUM + 1] = { 0 }; // PWM capable IOpins - not 0 or >33 on ESP32
-
-struct {
-  uint32_t freq; // ledcReadFreq doesn't work if a duty hasn't been set yet!
-  uint16_t res;
-} pwmInfo[(CHANNEL_MAX_NUM + 1) / 2];
-
-// ------------------------
-// Public functions
-// ------------------------
-
-#if ENABLED(WIFI_CUSTOM_COMMAND)
-
-  bool wifi_custom_command(char * const command_ptr) {
-    #if ENABLED(ESP3D_WIFISUPPORT)
-      return esp3dlib.parse(command_ptr);
-    #else
-      UNUSED(command_ptr);
-      return false;
-    #endif
-  }
-
-#endif
-
-#if ENABLED(USE_ESP32_EXIO)
-
-  HardwareSerial YSerial2(2);
-
-  void Write_EXIO(uint8_t IO, uint8_t v) {
-    if (hal.isr_state()) {
-      hal.isr_off();
-      YSerial2.write(0x80 | (((char)v) << 5) | (IO - 100));
-      hal.isr_on();
-    }
-    else
-      YSerial2.write(0x80 | (((char)v) << 5) | (IO - 100));
-  }
-
-#endif
-
-void MarlinHAL::init_board() {
-  #if ENABLED(USE_ESP32_TASK_WDT)
-    esp_task_wdt_init(10, true);
-  #endif
-  #if ENABLED(ESP3D_WIFISUPPORT)
-    esp3dlib.init();
-  #elif ENABLED(WIFISUPPORT)
-    wifi_init();
-    TERN_(OTASUPPORT, OTA_init());
-    #if ENABLED(WEBSUPPORT)
-      spiffs_init();
-      web_init();
-    #endif
-    server.begin();
-  #endif
-
-  // ESP32 uses a GPIO matrix that allows pins to be assigned to hardware serial ports.
-  // The following code initializes hardware Serial1 and Serial2 to use user-defined pins
-  // if they have been defined.
-  #if defined(HARDWARE_SERIAL1_RX) && defined(HARDWARE_SERIAL1_TX)
-    HardwareSerial Serial1(1);
-    #ifdef TMC_BAUD_RATE  // use TMC_BAUD_RATE for Serial1 if defined
-      Serial1.begin(TMC_BAUD_RATE, SERIAL_8N1, HARDWARE_SERIAL1_RX, HARDWARE_SERIAL1_TX);
-    #else  // use default BAUDRATE if TMC_BAUD_RATE not defined
-      Serial1.begin(BAUDRATE, SERIAL_8N1, HARDWARE_SERIAL1_RX, HARDWARE_SERIAL1_TX);
-    #endif
-  #endif
-  #if defined(HARDWARE_SERIAL2_RX) && defined(HARDWARE_SERIAL2_TX)
-    HardwareSerial Serial2(2);
-    #ifdef TMC_BAUD_RATE  // use TMC_BAUD_RATE for Serial1 if defined
-      Serial2.begin(TMC_BAUD_RATE, SERIAL_8N1, HARDWARE_SERIAL2_RX, HARDWARE_SERIAL2_TX);
-    #else  // use default BAUDRATE if TMC_BAUD_RATE not defined
-      Serial2.begin(BAUDRATE, SERIAL_8N1, HARDWARE_SERIAL2_RX, HARDWARE_SERIAL2_TX);
-    #endif
-  #endif
-
-  // Initialize the i2s peripheral only if the I2S stepper stream is enabled.
-  // The following initialization is performed after Serial1 and Serial2 are defined as
-  // their native pins might conflict with the i2s stream even when they are remapped.
-  #if ENABLED(USE_ESP32_EXIO)
-    YSerial2.begin(460800 * 3, SERIAL_8N1, 16, 17);
-  #elif ENABLED(I2S_STEPPER_STREAM)
-    i2s_init();
-  #endif
-}
-
-void MarlinHAL::idletask() {
-  #if BOTH(WIFISUPPORT, OTASUPPORT)
-    OTA_handle();
-  #endif
-  TERN_(ESP3D_WIFISUPPORT, esp3dlib.idletask());
-}
-
-uint8_t MarlinHAL::get_reset_source() { return rtc_get_reset_reason(1); }
-
-void MarlinHAL::reboot() { ESP.restart(); }
-
-void _delay_ms(int delay_ms) { delay(delay_ms); }
-
-// return free memory between end of heap (or end bss) and whatever is current
-int MarlinHAL::freeMemory() { return ESP.getFreeHeap(); }
-
-// ------------------------
-// Watchdog Timer
-// ------------------------
-
-#if ENABLED(USE_WATCHDOG)
-
-  #define WDT_TIMEOUT_US TERN(WATCHDOG_DURATION_8S, 8000000, 4000000) // 4 or 8 second timeout
-
-  extern "C" {
-    esp_err_t esp_task_wdt_reset();
-  }
-
-  void watchdogSetup() {
-    // do whatever. don't remove this function.
-  }
-
-  void MarlinHAL::watchdog_init() {
-    // TODO
-  }
-
-  // Reset watchdog.
-  void MarlinHAL::watchdog_refresh() { esp_task_wdt_reset(); }
-
-#endif
-
-// ------------------------
-// ADC
-// ------------------------
-
-#define ADC1_CHANNEL(pin) ADC1_GPIO ## pin ## _CHANNEL
-
-adc1_channel_t get_channel(int pin) {
-  switch (pin) {
-    case 39: return ADC1_CHANNEL(39);
-    case 36: return ADC1_CHANNEL(36);
-    case 35: return ADC1_CHANNEL(35);
-    case 34: return ADC1_CHANNEL(34);
-    case 33: return ADC1_CHANNEL(33);
-    case 32: return ADC1_CHANNEL(32);
-  }
-  return ADC1_CHANNEL_MAX;
-}
-
-void adc1_set_attenuation(adc1_channel_t chan, adc_atten_t atten) {
-  if (attenuations[chan] != atten) {
-    adc1_config_channel_atten(chan, atten);
-    attenuations[chan] = atten;
-  }
-}
-
-void MarlinHAL::adc_init() {
-  // Configure ADC
-  adc1_config_width(ADC_WIDTH_12Bit);
-
-  // Configure channels only if used as (re-)configuring a pin for ADC that is used elsewhere might have adverse effects
-  TERN_(HAS_TEMP_ADC_0,        adc1_set_attenuation(get_channel(TEMP_0_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_ADC_1,        adc1_set_attenuation(get_channel(TEMP_1_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_ADC_2,        adc1_set_attenuation(get_channel(TEMP_2_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_ADC_3,        adc1_set_attenuation(get_channel(TEMP_3_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_ADC_4,        adc1_set_attenuation(get_channel(TEMP_4_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_ADC_5,        adc1_set_attenuation(get_channel(TEMP_5_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_ADC_6,        adc2_set_attenuation(get_channel(TEMP_6_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_ADC_7,        adc3_set_attenuation(get_channel(TEMP_7_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_HEATED_BED,        adc1_set_attenuation(get_channel(TEMP_BED_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_CHAMBER,      adc1_set_attenuation(get_channel(TEMP_CHAMBER_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_PROBE,        adc1_set_attenuation(get_channel(TEMP_PROBE_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_COOLER,       adc1_set_attenuation(get_channel(TEMP_COOLER_PIN), ADC_ATTEN_11db));
-  TERN_(HAS_TEMP_BOARD,        adc1_set_attenuation(get_channel(TEMP_BOARD_PIN), ADC_ATTEN_11db));
-  TERN_(FILAMENT_WIDTH_SENSOR, adc1_set_attenuation(get_channel(FILWIDTH_PIN), ADC_ATTEN_11db));
-
-  // Note that adc2 is shared with the WiFi module, which has higher priority, so the conversion may fail.
-  // That's why we're not setting it up here.
-
-  // Calculate ADC characteristics (i.e., gain and offset factors for each attenuation level)
-  for (int i = 0; i < ADC_ATTEN_MAX; i++) {
-    esp_adc_cal_characterize(ADC_UNIT_1, (adc_atten_t)i, ADC_WIDTH_BIT_12, V_REF, &characteristics[i]);
-
-    // Change attenuation 100mV below the calibrated threshold
-    thresholds[i] = esp_adc_cal_raw_to_voltage(4095, &characteristics[i]);
-  }
-}
-
-#ifndef ADC_REFERENCE_VOLTAGE
-  #define ADC_REFERENCE_VOLTAGE 3.3
-#endif
-
-void MarlinHAL::adc_start(const pin_t pin) {
-  const adc1_channel_t chan = get_channel(pin);
-  uint32_t mv;
-  esp_adc_cal_get_voltage((adc_channel_t)chan, &characteristics[attenuations[chan]], &mv);
-
-  adc_result = mv * isr_float_t(1023) / isr_float_t(ADC_REFERENCE_VOLTAGE) / isr_float_t(1000);
-
-  // Change the attenuation level based on the new reading
-  adc_atten_t atten;
-  if (mv < thresholds[ADC_ATTEN_DB_0] - 100)
-    atten = ADC_ATTEN_DB_0;
-  else if (mv > thresholds[ADC_ATTEN_DB_0] - 50 && mv < thresholds[ADC_ATTEN_DB_2_5] - 100)
-    atten = ADC_ATTEN_DB_2_5;
-  else if (mv > thresholds[ADC_ATTEN_DB_2_5] - 50 && mv < thresholds[ADC_ATTEN_DB_6] - 100)
-    atten = ADC_ATTEN_DB_6;
-  else if (mv > thresholds[ADC_ATTEN_DB_6] - 50)
-    atten = ADC_ATTEN_DB_11;
-  else return;
-
-  adc1_set_attenuation(chan, atten);
-}
-
-// ------------------------
-// PWM
-// ------------------------
-
-int8_t channel_for_pin(const uint8_t pin) {
-  for (int i = 0; i <= CHANNEL_MAX_NUM; i++)
-    if (chan_pin[i] == pin) return i;
-  return -1;
-}
-
-// get PWM channel for pin - if none then attach a new one
-// return -1 if fail or invalid pin#, channel # (0-15) if success
-int8_t get_pwm_channel(const pin_t pin, const uint32_t freq, const uint16_t res) {
-  if (!WITHIN(pin, 1, MAX_PWM_IOPIN)) return -1; // Not a hardware PWM pin!
-  int8_t cid = channel_for_pin(pin);
-  if (cid >= 0) return cid;
-
-  // Find an empty adjacent channel (same timer & freq/res)
-  for (int i = 0; i <= CHANNEL_MAX_NUM; i++) {
-    if (chan_pin[i] == 0) {
-      if (chan_pin[i ^ 0x1] != 0) {
-        if (pwmInfo[i / 2].freq == freq && pwmInfo[i / 2].res == res) {
-          chan_pin[i] = pin; // Allocate PWM to this channel
-          ledcAttachPin(pin, i);
-          return i;
-        }
-      }
-      else if (cid == -1)    // Pair of empty channels?
-        cid = i & 0xFE;      // Save lower channel number
-    }
-  }
-  // not attached, is an empty timer slot avail?
-  if (cid >= 0) {
-    chan_pin[cid] = pin;
-    pwmInfo[cid / 2].freq = freq;
-    pwmInfo[cid / 2].res = res;
-    ledcSetup(cid, freq, res);
-    ledcAttachPin(pin, cid);
-  }
-  return cid; // -1 if no channel avail
-}
-
-void MarlinHAL::set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=_BV(PWM_RESOLUTION)-1*/, const bool invert/*=false*/) {
-  const int8_t cid = get_pwm_channel(pin, PWM_FREQUENCY, PWM_RESOLUTION);
-  if (cid >= 0) {
-    uint32_t duty = map(invert ? v_size - v : v, 0, v_size, 0, _BV(PWM_RESOLUTION)-1);
-    ledcWrite(cid, duty);
-  }
-}
-
-int8_t MarlinHAL::set_pwm_frequency(const pin_t pin, const uint32_t f_desired) {
-  const int8_t cid = channel_for_pin(pin);
-  if (cid >= 0) {
-    if (f_desired == ledcReadFreq(cid)) return cid; // no freq change
-    ledcDetachPin(chan_pin[cid]);
-    chan_pin[cid] = 0;              // remove old freq channel
-  }
-  return get_pwm_channel(pin, f_desired, PWM_RESOLUTION); // try for new one
-}
-
-// use hardware PWM if avail, if not then ISR
-void analogWrite(const pin_t pin, const uint16_t value, const uint32_t freq/*=PWM_FREQUENCY*/, const uint16_t res/*=8*/) { // always 8 bit resolution!
-  // Use ledc hardware for internal pins
-  const int8_t cid = get_pwm_channel(pin, freq, res);
-  if (cid >= 0) {
-    ledcWrite(cid, value); // set duty value
-    return;
-  }
-
-  // not a hardware PWM pin OR no PWM channels available
-  int idx = -1;
-
-  // Search Pin
-  for (int i = 0; i < numPWMUsed; ++i)
-    if (pwmState[i].pin == pin) { idx = i; break; }
-
-  // not found ?
-  if (idx < 0) {
-    // No slots remaining
-    if (numPWMUsed >= MAX_PWM_PINS) return;
-
-    // Take new slot for pin
-    idx = numPWMUsed;
-    pwmState[idx].pin = pin;
-    // Start timer on first use
-    if (idx == 0) HAL_timer_start(MF_TIMER_PWM, PWM_TIMER_FREQUENCY);
-
-    ++numPWMUsed;
-  }
-
-  // Use 7bit internal value - add 1 to have 100% high at 255
-  pwmState[idx].value = (value + 1) / 2;
-}
-
-// Handle PWM timer interrupt
-HAL_PWM_TIMER_ISR() {
-  HAL_timer_isr_prologue(MF_TIMER_PWM);
-
-  static uint8_t count = 0;
-
-  for (int i = 0; i < numPWMUsed; ++i) {
-    if (count == 0)                   // Start of interval
-      digitalWrite(pwmState[i].pin, pwmState[i].value ? HIGH : LOW);
-    else if (pwmState[i].value == count)   // End of duration
-      digitalWrite(pwmState[i].pin, LOW);
-  }
-
-  // 128 for 7 Bit resolution
-  count = (count + 1) & 0x7F;
-
-  HAL_timer_isr_epilogue(MF_TIMER_PWM);
-}
-
-#endif // ARDUINO_ARCH_ESP32
--- a/Marlin/src/HAL/ESP32/HAL.h
+++ b/Marlin/src/HAL/ESP32/HAL.h
@@ -1,235 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#pragma once
-
-/**
- * HAL for Espressif ESP32 WiFi
- */
-
-#define CPU_32_BIT
-
-#include <stdint.h>
-
-#include "../shared/Marduino.h"
-#include "../shared/math_32bit.h"
-#include "../shared/HAL_SPI.h"
-
-#include "fastio.h"
-#include "i2s.h"
-
-#if ENABLED(WIFISUPPORT)
-  #include "WebSocketSerial.h"
-#endif
-
-#if ENABLED(ESP3D_WIFISUPPORT)
-  #include "esp3dlib.h"
-#endif
-
-#include "FlushableHardwareSerial.h"
-
-// ------------------------
-// Defines
-// ------------------------
-
-#define MYSERIAL1 flushableSerial
-
-#if EITHER(WIFISUPPORT, ESP3D_WIFISUPPORT)
-  #if ENABLED(ESP3D_WIFISUPPORT)
-    typedef ForwardSerial1Class< decltype(Serial2Socket) > DefaultSerial1;
-    extern DefaultSerial1 MSerial0;
-    #define MYSERIAL2 MSerial0
-  #else
-    #define MYSERIAL2 webSocketSerial
-  #endif
-#endif
-
-#define CRITICAL_SECTION_START() portENTER_CRITICAL(&spinlock)
-#define CRITICAL_SECTION_END()   portEXIT_CRITICAL(&spinlock)
-
-#define HAL_CAN_SET_PWM_FREQ   // This HAL supports PWM Frequency adjustment
-#define PWM_FREQUENCY  1000u   // Default PWM frequency when set_pwm_duty() is called without set_pwm_frequency()
-#define PWM_RESOLUTION   10u   // Default PWM bit resolution
-#define CHANNEL_MAX_NUM  15u   // max PWM channel # to allocate (7 to only use low speed, 15 to use low & high)
-#define MAX_PWM_IOPIN    33u   // hardware pwm pins < 34
-
-// ------------------------
-// Types
-// ------------------------
-
-typedef double isr_float_t;   // FPU ops are used for single-precision, so use double for ISRs.
-typedef int16_t pin_t;
-
-class Servo;
-typedef Servo hal_servo_t;
-
-// ------------------------
-// Public functions
-// ------------------------
-
-//
-// Tone
-//
-void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration=0);
-void noTone(const pin_t _pin);
-int8_t get_pwm_channel(const pin_t pin, const uint32_t freq, const uint16_t res);
-void analogWrite(const pin_t pin, const uint16_t value, const uint32_t freq=PWM_FREQUENCY, const uint16_t res=8);
-
-//
-// Pin Mapping for M42, M43, M226
-//
-#define GET_PIN_MAP_PIN(index) index
-#define GET_PIN_MAP_INDEX(pin) pin
-#define PARSED_PIN_INDEX(code, dval) parser.intval(code, dval)
-
-#if ENABLED(USE_ESP32_EXIO)
-  void Write_EXIO(uint8_t IO, uint8_t v);
-#endif
-
-//
-// Delay in cycles (used by DELAY_NS / DELAY_US)
-//
-FORCE_INLINE static void DELAY_CYCLES(uint32_t x) {
-  unsigned long start, ccount, stop;
-
-  /**
-   * It's important to care for race conditions (and overflows) here.
-   * Race condition example: If `stop` calculates to being close to the upper boundary of
-   * `uint32_t` and if at the same time a longer loop interruption kicks in (e.g. due to other
-   * FreeRTOS tasks or interrupts), `ccount` might overflow (and therefore be below `stop` again)
-   * without the loop ever being able to notice that `ccount` had already been above `stop` once
-   * (and that therefore the number of cycles to delay has already passed).
-   * As DELAY_CYCLES (through DELAY_NS / DELAY_US) is used by software SPI bit banging to drive
-   * LCDs and therefore might be called very, very often, this seemingly improbable situation did
-   * actually happen in reality. It resulted in apparently random print pauses of ~17.9 seconds
-   * (0x100000000 / 240 MHz) or multiples thereof, essentially ruining the current print by causing
-   * large blobs of filament.
-   */
-
-  __asm__ __volatile__ ( "rsr     %0, ccount" : "=a" (start) );
-  stop = start + x;
-  ccount = start;
-
-  if (stop >= start) {
-    // no overflow, so only loop while in between start and stop:
-    // 0x00000000 -----------------start****stop-- 0xFFFFFFFF
-    while (ccount >= start && ccount < stop) {
-      __asm__ __volatile__ ( "rsr     %0, ccount" : "=a" (ccount) );
-    }
-  }
-  else {
-    // stop did overflow, so only loop while outside of stop and start:
-    // 0x00000000 **stop-------------------start** 0xFFFFFFFF
-    while (ccount >= start || ccount < stop) {
-      __asm__ __volatile__ ( "rsr     %0, ccount" : "=a" (ccount) );
-    }
-  }
-
-}
-
-// ------------------------
-// Class Utilities
-// ------------------------
-
-#pragma GCC diagnostic push
-#if GCC_VERSION <= 50000
-  #pragma GCC diagnostic ignored "-Wunused-function"
-#endif
-
-int freeMemory();
-
-#pragma GCC diagnostic pop
-
-void _delay_ms(const int ms);
-
-// ------------------------
-// MarlinHAL Class
-// ------------------------
-
-#define HAL_ADC_VREF         3.3
-#define HAL_ADC_RESOLUTION  10
-
-class MarlinHAL {
-public:
-
-  // Earliest possible init, before setup()
-  MarlinHAL() {}
-
-  // Watchdog
-  static void watchdog_init()    IF_DISABLED(USE_WATCHDOG, {});
-  static void watchdog_refresh() IF_DISABLED(USE_WATCHDOG, {});
-
-  static void init() {}        // Called early in setup()
-  static void init_board();    // Called less early in setup()
-  static void reboot();        // Restart the firmware
-
-  // Interrupts
-  static portMUX_TYPE spinlock;
-  static bool isr_state() { return spinlock.owner == portMUX_FREE_VAL; }
-  static void isr_on()  { if (spinlock.owner != portMUX_FREE_VAL) portEXIT_CRITICAL(&spinlock); }
-  static void isr_off() { portENTER_CRITICAL(&spinlock); }
-
-  static void delay_ms(const int ms) { _delay_ms(ms); }
-
-  // Tasks, called from idle()
-  static void idletask();
-
-  // Reset
-  static uint8_t get_reset_source();
-  static void clear_reset_source() {}
-
-  // Free SRAM
-  static int freeMemory();
-
-  //
-  // ADC Methods
-  //
-
-  static uint16_t adc_result;
-
-  // Called by Temperature::init once at startup
-  static void adc_init();
-
-  // Called by Temperature::init for each sensor at startup
-  static void adc_enable(const pin_t pin) {}
-
-  // Begin ADC sampling on the given pin. Called from Temperature::isr!
-  static void adc_start(const pin_t pin);
-
-  // Is the ADC ready for reading?
-  static bool adc_ready() { return true; }
-
-  // The current value of the ADC register
-  static uint16_t adc_value() { return adc_result; }
-
-  /**
-   * If not already allocated, allocate a hardware PWM channel
-   * to the pin and set the duty cycle..
-   * Optionally invert the duty cycle [default = false]
-   * Optionally change the scale of the provided value to enable finer PWM duty control [default = 255]
-   */
-  static void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size=255, const bool invert=false);
-
-  /**
-   * Allocate and set the frequency of a hardware PWM pin
-   * Returns -1 if no pin available.
-   */
-  static int8_t set_pwm_frequency(const pin_t pin, const uint32_t f_desired);
-
-};
--- a/Marlin/src/HAL/ESP32/Tone.cpp
+++ b/Marlin/src/HAL/ESP32/Tone.cpp
@@ -1,59 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * Copypaste of SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-
-/**
- * Description: Tone function for ESP32
- * Derived from https://forum.arduino.cc/index.php?topic=136500.msg2903012#msg2903012
- */
-
-#ifdef ARDUINO_ARCH_ESP32
-
-#include "../../inc/MarlinConfig.h"
-#include "HAL.h"
-
-static pin_t tone_pin;
-volatile static int32_t toggles;
-
-void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration/*=0*/) {
-  tone_pin = _pin;
-  toggles = 2 * frequency * duration / 1000;
-  HAL_timer_start(MF_TIMER_TONE, 2 * frequency);
-}
-
-void noTone(const pin_t _pin) {
-  HAL_timer_disable_interrupt(MF_TIMER_TONE);
-  WRITE(_pin, LOW);
-}
-
-HAL_TONE_TIMER_ISR() {
-  HAL_timer_isr_prologue(MF_TIMER_TONE);
-
-  if (toggles) {
-    toggles--;
-    TOGGLE(tone_pin);
-  }
-  else noTone(tone_pin);                         // turn off interrupt
-}
-
-#endif // ARDUINO_ARCH_ESP32
--- a/Marlin/src/HAL/ESP32/esp32.csv
+++ b/Marlin/src/HAL/ESP32/esp32.csv
@@ -1,6 +0,0 @@
-# Name,   Type, SubType, Offset,  Size, Flags
-nvs,      data, nvs,     0x9000,   0x5000,
-otadata,  data, ota,     0xe000,   0x2000,
-app0,     app,  ota_0,   0x10000,  0x180000,
-app1,     app,  ota_1,   0x190000, 0x180000,
-spiffs,   data, spiffs,  0x310000, 0xF0000,
--- a/Marlin/src/HAL/ESP32/u8g_esp32_spi.cpp
+++ b/Marlin/src/HAL/ESP32/u8g_esp32_spi.cpp
@@ -1,94 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2022 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * Copypaste of SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#ifdef ARDUINO_ARCH_ESP32
-
-#include "../../inc/MarlinConfig.h"
-
-#if EITHER(MKS_MINI_12864, FYSETC_MINI_12864_2_1)
-
-#include <U8glib-HAL.h>
-#include "../shared/HAL_SPI.h"
-#include "HAL.h"
-#include "SPI.h"
-
-static SPISettings spiConfig;
-
-
-#ifndef LCD_SPI_SPEED
-  #ifdef SD_SPI_SPEED
-    #define LCD_SPI_SPEED SD_SPI_SPEED    // Assume SPI speed shared with SD
-  #else
-    #define LCD_SPI_SPEED SPI_FULL_SPEED  // Use full speed if SD speed is not supplied
-  #endif
-#endif
-
-uint8_t u8g_eps_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr) {
-  static uint8_t msgInitCount = 2; // Ignore all messages until 2nd U8G_COM_MSG_INIT
-  if (msgInitCount) {
-    if (msg == U8G_COM_MSG_INIT) msgInitCount--;
-    if (msgInitCount) return -1;
-  }
-
-  switch (msg) {
-    case U8G_COM_MSG_STOP: break;
-
-    case U8G_COM_MSG_INIT:
-      OUT_WRITE(DOGLCD_CS, HIGH);
-      OUT_WRITE(DOGLCD_A0, HIGH);
-      OUT_WRITE(LCD_RESET_PIN, HIGH);
-      u8g_Delay(5);
-      spiBegin();
-      spiInit(LCD_SPI_SPEED);
-      break;
-
-    case U8G_COM_MSG_ADDRESS:           /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
-      WRITE(DOGLCD_A0, arg_val ? HIGH : LOW);
-      break;
-
-    case U8G_COM_MSG_CHIP_SELECT:       /* arg_val == 0 means HIGH level of U8G_PI_CS */
-      WRITE(DOGLCD_CS, arg_val ? LOW : HIGH);
-      break;
-
-    case U8G_COM_MSG_RESET:
-      WRITE(LCD_RESET_PIN, arg_val);
-      break;
-
-    case U8G_COM_MSG_WRITE_BYTE:
-      spiSend((uint8_t)arg_val);
-      break;
-
-    case U8G_COM_MSG_WRITE_SEQ:
-      uint8_t *ptr = (uint8_t*) arg_ptr;
-      while (arg_val > 0) {
-        spiSend(*ptr++);
-        arg_val--;
-      }
-      break;
-  }
-  return 1;
-}
-
-#endif // EITHER(MKS_MINI_12864, FYSETC_MINI_12864_2_1)
-
-#endif // ARDUINO_ARCH_ESP32
--- a/Marlin/src/HAL/HAL.h
+++ b/Marlin/src/HAL/HAL.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,32 +16,19 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once

 #include "platforms.h"

-#ifndef GCC_VERSION
-  #define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
-#endif
-
 #include HAL_PATH(.,HAL.h)
-extern MarlinHAL hal;

 #define HAL_ADC_RANGE _BV(HAL_ADC_RESOLUTION)

-#ifndef I2C_ADDRESS
-  #define I2C_ADDRESS(A) uint8_t(A)
-#endif
-
-// Needed for AVR sprintf_P PROGMEM extension
-#ifndef S_FMT
-  #define S_FMT "%s"
-#endif
-
-// String helper
-#ifndef PGMSTR
-  #define PGMSTR(NAM,STR) const char NAM[] = STR
-#endif
+inline void watchdog_refresh() {
+  #if ENABLED(USE_WATCHDOG)
+    HAL_watchdog_refresh();
+  #endif
+}
--- a/Marlin/src/HAL/HAL_AVR/HAL.cpp
+++ b/Marlin/src/HAL/HAL_AVR/HAL.cpp
@@ -0,0 +1,79 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef __AVR__
+
+#include "../../inc/MarlinConfig.h"
+#include "HAL.h"
+
+// ------------------------
+// Public Variables
+// ------------------------
+
+//uint8_t MCUSR;
+
+// ------------------------
+// Public functions
+// ------------------------
+
+void HAL_init() {
+  // Init Servo Pins
+  #define INIT_SERVO(N) OUT_WRITE(SERVO##N##_PIN, LOW)
+  #if HAS_SERVO_0
+    INIT_SERVO(0);
+  #endif
+  #if HAS_SERVO_1
+    INIT_SERVO(1);
+  #endif
+  #if HAS_SERVO_2
+    INIT_SERVO(2);
+  #endif
+  #if HAS_SERVO_3
+    INIT_SERVO(3);
+  #endif
+}
+
+#if ENABLED(SDSUPPORT)
+
+  #include "../../sd/SdFatUtil.h"
+  int freeMemory() { return SdFatUtil::FreeRam(); }
+
+#else // !SDSUPPORT
+
+extern "C" {
+  extern char __bss_end;
+  extern char __heap_start;
+  extern void* __brkval;
+
+  int freeMemory() {
+    int free_memory;
+    if ((int)__brkval == 0)
+      free_memory = ((int)&free_memory) - ((int)&__bss_end);
+    else
+      free_memory = ((int)&free_memory) - ((int)__brkval);
+    return free_memory;
+  }
+}
+
+#endif // !SDSUPPORT
+
+#endif // __AVR__
--- a/Marlin/src/HAL/HAL_AVR/HAL.h
+++ b/Marlin/src/HAL/HAL_AVR/HAL.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
 *
 * This program is free software: you can redistribute it and/or modify
@@ -14,12 +14,54 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 #pragma once

+#include "../shared/Marduino.h"
+#include "../shared/HAL_SPI.h"
+#include "fastio.h"
+#include "watchdog.h"
+#include "math.h"
+
+#ifdef USBCON
+  #include <HardwareSerial.h>
+#else
+  #define HardwareSerial_h // Hack to prevent HardwareSerial.h header inclusion
+  #include "MarlinSerial.h"
+#endif
+
 #include <stdint.h>
+#include <util/delay.h>
+#include <avr/eeprom.h>
+#include <avr/pgmspace.h>
+#include <avr/interrupt.h>
+#include <avr/io.h>
+
+#ifndef pgm_read_ptr
+  // Compatibility for avr-libc 1.8.0-4.1 included with Ubuntu for
+  // Windows Subsystem for Linux on Windows 10 as of 10/18/2019
+  #define pgm_read_ptr_far(address_long) (void*)__ELPM_word((uint32_t)(address_long))
+  #define pgm_read_ptr_near(address_short) (void*)__LPM_word((uint16_t)(address_short))
+  #define pgm_read_ptr(address_short) pgm_read_ptr_near(address_short)
+#endif
+
+// ------------------------
+// Defines
+// ------------------------
+
+//#define analogInputToDigitalPin(IO) IO
+
+#ifndef CRITICAL_SECTION_START
+  #define CRITICAL_SECTION_START  unsigned char _sreg = SREG; cli()
+  #define CRITICAL_SECTION_END    SREG = _sreg
+#endif
+#define ISRS_ENABLED() TEST(SREG, SREG_I)
+#define ENABLE_ISRS()  sei()
+#define DISABLE_ISRS() cli()
+
+// On AVR this is in math.h?
+//#define square(x) ((x)*(x))

 // ------------------------
 // Types
@@ -28,21 +70,84 @@
 typedef uint16_t hal_timer_t;
 #define HAL_TIMER_TYPE_MAX 0xFFFF

+typedef int8_t pin_t;
+
+#define SHARED_SERVOS HAS_SERVOS
+#define HAL_SERVO_LIB Servo
+
 // ------------------------
-// Defines
+// Public Variables
 // ------------------------

+//extern uint8_t MCUSR;
+
+// Serial ports
+#ifdef USBCON
+  #if ENABLED(BLUETOOTH)
+    #define MYSERIAL0 bluetoothSerial
+  #else
+    #define MYSERIAL0 Serial
+  #endif
+  #define NUM_SERIAL 1
+#else
+  #if !WITHIN(SERIAL_PORT, -1, 3)
+    #error "SERIAL_PORT must be from -1 to 3. Please update your configuration."
+  #endif
+
+  #define MYSERIAL0 customizedSerial1
+
+  #ifdef SERIAL_PORT_2
+    #if !WITHIN(SERIAL_PORT_2, -1, 3)
+      #error "SERIAL_PORT_2 must be from -1 to 3. Please update your configuration."
+    #elif SERIAL_PORT_2 == SERIAL_PORT
+      #error "SERIAL_PORT_2 must be different than SERIAL_PORT. Please update your configuration."
+    #endif
+    #define MYSERIAL1 customizedSerial2
+    #define NUM_SERIAL 2
+  #else
+    #define NUM_SERIAL 1
+  #endif
+#endif
+
+#ifdef DGUS_SERIAL_PORT
+  #if !WITHIN(DGUS_SERIAL_PORT, -1, 3)
+    #error "DGUS_SERIAL_PORT must be from -1 to 3. Please update your configuration."
+  #elif DGUS_SERIAL_PORT == SERIAL_PORT
+    #error "DGUS_SERIAL_PORT must be different than SERIAL_PORT. Please update your configuration."
+  #elif defined(SERIAL_PORT_2) && DGUS_SERIAL_PORT == SERIAL_PORT_2
+    #error "DGUS_SERIAL_PORT must be different than SERIAL_PORT_2. Please update your configuration."
+  #endif
+  #define DGUS_SERIAL internalDgusSerial
+
+  #define DGUS_SERIAL_GET_TX_BUFFER_FREE DGUS_SERIAL.get_tx_buffer_free
+#endif
+
+// ------------------------
+// Public functions
+// ------------------------
+
+void HAL_init();
+
+//void cli();
+
+//void _delay_ms(const int delay);
+
+inline void HAL_clear_reset_source() { MCUSR = 0; }
+inline uint8_t HAL_get_reset_source() { return MCUSR; }
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+extern "C" {
+  int freeMemory();
+}
+#pragma GCC diagnostic pop
+
+// timers
 #define HAL_TIMER_RATE          ((F_CPU) / 8)    // i.e., 2MHz or 2.5MHz

-#ifndef MF_TIMER_STEP
-  #define MF_TIMER_STEP         1
-#endif
-#ifndef MF_TIMER_PULSE
-  #define MF_TIMER_PULSE        MF_TIMER_STEP
-#endif
-#ifndef MF_TIMER_TEMP
-  #define MF_TIMER_TEMP         0
-#endif
+#define STEP_TIMER_NUM          1
+#define TEMP_TIMER_NUM          0
+#define PULSE_TIMER_NUM         STEP_TIMER_NUM

 #define TEMP_TIMER_FREQUENCY    ((F_CPU) / 64.0 / 256.0)

@@ -58,13 +163,13 @@ typedef uint16_t hal_timer_t;
 #define DISABLE_STEPPER_DRIVER_INTERRUPT() CBI(TIMSK1, OCIE1A)
 #define STEPPER_ISR_ENABLED()             TEST(TIMSK1, OCIE1A)

-#define ENABLE_TEMPERATURE_INTERRUPT()     SBI(TIMSK0, OCIE0A)
-#define DISABLE_TEMPERATURE_INTERRUPT()    CBI(TIMSK0, OCIE0A)
-#define TEMPERATURE_ISR_ENABLED()         TEST(TIMSK0, OCIE0A)
+#define ENABLE_TEMPERATURE_INTERRUPT()     SBI(TIMSK0, OCIE0B)
+#define DISABLE_TEMPERATURE_INTERRUPT()    CBI(TIMSK0, OCIE0B)
+#define TEMPERATURE_ISR_ENABLED()         TEST(TIMSK0, OCIE0B)

 FORCE_INLINE void HAL_timer_start(const uint8_t timer_num, const uint32_t) {
  switch (timer_num) {
-    case MF_TIMER_STEP:
+    case STEP_TIMER_NUM:
      // waveform generation = 0100 = CTC
      SET_WGM(1, CTC_OCRnA);

@@ -84,10 +189,10 @@ FORCE_INLINE void HAL_timer_start(const uint8_t timer_num, const uint32_t) {
      TCNT1 = 0;
      break;

-    case MF_TIMER_TEMP:
+    case TEMP_TIMER_NUM:
      // Use timer0 for temperature measurement
      // Interleave temperature interrupt with millies interrupt
-      OCR0A = 128;
+      OCR0B = 128;
      break;
  }
 }
@@ -109,10 +214,8 @@ FORCE_INLINE void HAL_timer_start(const uint8_t timer_num, const uint32_t) {
 * (otherwise, characters will be lost due to UART overflow).
 * Then: Stepper, Endstops, Temperature, and -finally- all others.
 */
-#define HAL_timer_isr_prologue(T) NOOP
-#define HAL_timer_isr_epilogue(T) NOOP
-
-#ifndef HAL_STEP_TIMER_ISR
+#define HAL_timer_isr_prologue(TIMER_NUM)
+#define HAL_timer_isr_epilogue(TIMER_NUM)

 /* 18 cycles maximum latency */
 #define HAL_STEP_TIMER_ISR() \
@@ -180,22 +283,18 @@ void TIMER1_COMPA_vect() { \
    :                                   \
    : [timsk0] "i" ((uint16_t)&TIMSK0), \
      [timsk1] "i" ((uint16_t)&TIMSK1), \
-      [msk0] "M" ((uint8_t)(1<<OCIE0A)),\
+      [msk0] "M" ((uint8_t)(1<<OCIE0B)),\
      [msk1] "M" ((uint8_t)(1<<OCIE1A)) \
    : \
  ); \
 } \
 void TIMER1_COMPA_vect_bottom()

-#endif // HAL_STEP_TIMER_ISR
-
-#ifndef HAL_TEMP_TIMER_ISR
-
 /* 14 cycles maximum latency */
 #define HAL_TEMP_TIMER_ISR() \
-extern "C" void TIMER0_COMPA_vect() __attribute__ ((signal, naked, used, externally_visible)); \
-extern "C" void TIMER0_COMPA_vect_bottom()  asm ("TIMER0_COMPA_vect_bottom") __attribute__ ((used, externally_visible, noinline)); \
-void TIMER0_COMPA_vect() { \
+extern "C" void TIMER0_COMPB_vect() __attribute__ ((signal, naked, used, externally_visible)); \
+extern "C" void TIMER0_COMPB_vect_bottom()  asm ("TIMER0_COMPB_vect_bottom") __attribute__ ((used, externally_visible, noinline)); \
+void TIMER0_COMPB_vect() { \
  __asm__ __volatile__ ( \
    A("push r16")                       /* 2 Save R16 */ \
    A("in r16, __SREG__")               /* 1 Get SREG */ \
@@ -223,7 +322,7 @@ void TIMER0_COMPA_vect() { \
    A("push r30")                       \
    A("push r31")                       \
    A("clr r1")                         /* C runtime expects this register to be 0 */ \
-    A("call TIMER0_COMPA_vect_bottom")  /* Call the bottom handler - No inlining allowed, otherwise registers used are not saved */   \
+    A("call TIMER0_COMPB_vect_bottom")  /* Call the bottom handler - No inlining allowed, otherwise registers used are not saved */   \
    A("pop r31")                        \
    A("pop r30")                        \
    A("pop r27")                        \
@@ -251,10 +350,66 @@ void TIMER0_COMPA_vect() { \
    A("reti")                           /* 4 Return from interrupt */ \
    :                                   \
    : [timsk0] "i"((uint16_t)&TIMSK0),  \
-      [msk0] "M" ((uint8_t)(1<<OCIE0A)) \
+      [msk0] "M" ((uint8_t)(1<<OCIE0B)) \
    : \
  ); \
 } \
-void TIMER0_COMPA_vect_bottom()
+void TIMER0_COMPB_vect_bottom()

-#endif // HAL_TEMP_TIMER_ISR
+// ADC
+#ifdef DIDR2
+  #define HAL_ANALOG_SELECT(ind) do{ if (ind < 8) SBI(DIDR0, ind); else SBI(DIDR2, ind & 0x07); }while(0)
+#else
+  #define HAL_ANALOG_SELECT(ind) SBI(DIDR0, ind);
+#endif
+
+inline void HAL_adc_init() {
+  ADCSRA = _BV(ADEN) | _BV(ADSC) | _BV(ADIF) | 0x07;
+  DIDR0 = 0;
+  #ifdef DIDR2
+    DIDR2 = 0;
+  #endif
+}
+
+#define SET_ADMUX_ADCSRA(ch) ADMUX = _BV(REFS0) | (ch & 0x07); SBI(ADCSRA, ADSC)
+#ifdef MUX5
+  #define HAL_START_ADC(ch) if (ch > 7) ADCSRB = _BV(MUX5); else ADCSRB = 0; SET_ADMUX_ADCSRA(ch)
+#else
+  #define HAL_START_ADC(ch) ADCSRB = 0; SET_ADMUX_ADCSRA(ch)
+#endif
+
+#define HAL_ADC_RESOLUTION 10
+#define HAL_READ_ADC()  ADC
+#define HAL_ADC_READY() !TEST(ADCSRA, ADSC)
+
+#define GET_PIN_MAP_PIN(index) index
+#define GET_PIN_MAP_INDEX(pin) pin
+#define PARSED_PIN_INDEX(code, dval) parser.intval(code, dval)
+
+#define HAL_SENSITIVE_PINS 0, 1
+
+#ifdef __AVR_AT90USB1286__
+  #define JTAG_DISABLE() do{ MCUCR = 0x80; MCUCR = 0x80; }while(0)
+#endif
+
+// AVR compatibility
+#define strtof strtod
+
+/**
+ *  set_pwm_frequency
+ *  Sets the frequency of the timer corresponding to the provided pin
+ *  as close as possible to the provided desired frequency. Internally
+ *  calculates the required waveform generation mode, prescaler and
+ *  resolution values required and sets the timer registers accordingly.
+ *  NOTE that the frequency is applied to all pins on the timer (Ex OC3A, OC3B and OC3B)
+ *  NOTE that there are limitations, particularly if using TIMER2. (see Configuration_adv.h -> FAST FAN PWM Settings)
+ */
+void set_pwm_frequency(const pin_t pin, int f_desired);
+
+/**
+ * set_pwm_duty
+ *  Sets the PWM duty cycle of the provided pin to the provided value
+ *  Optionally allows inverting the duty cycle [default = false]
+ *  Optionally allows changing the maximum size of the provided value to enable finer PWM duty control [default = 255]
+ */
+void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size=255, const bool invert=false);
--- a/Marlin/src/HAL/HAL_AVR/HAL_SPI.cpp
+++ b/Marlin/src/HAL/HAL_AVR/HAL_SPI.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -34,21 +34,21 @@
 #include "../../inc/MarlinConfig.h"

 void spiBegin() {
-  #if PIN_EXISTS(SD_SS)
-    // Do not init HIGH for boards with pin 4 used as Fans or Heaters or otherwise, not likely to have multiple SPI devices anyway.
-    #if defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644PA__) || defined(__AVR_ATmega1284P__)
-      // SS must be in output mode even it is not chip select
-      SET_OUTPUT(SD_SS_PIN);
-    #else
-      // set SS high - may be chip select for another SPI device
-      OUT_WRITE(SD_SS_PIN, HIGH);
-    #endif
-  #endif
-  SET_OUTPUT(SD_SCK_PIN);
-  SET_INPUT(SD_MISO_PIN);
-  SET_OUTPUT(SD_MOSI_PIN);
+  OUT_WRITE(SS_PIN, HIGH);
+  SET_OUTPUT(SCK_PIN);
+  SET_INPUT(MISO_PIN);
+  SET_OUTPUT(MOSI_PIN);

-  IF_DISABLED(SOFTWARE_SPI, spiInit(SPI_HALF_SPEED));
+  #if DISABLED(SOFTWARE_SPI)
+    // SS must be in output mode even it is not chip select
+    //SET_OUTPUT(SS_PIN);
+    // set SS high - may be chip select for another SPI device
+    //#if SET_SPI_SS_HIGH
+      //WRITE(SS_PIN, HIGH);
+    //#endif
+    // set a default rate
+    spiInit(1);
+  #endif
 }

 #if NONE(SOFTWARE_SPI, FORCE_SOFT_SPI)
@@ -74,8 +74,7 @@ void spiBegin() {
      #elif defined(PRR0)
        PRR0
      #endif
-      , PRSPI
-    );
+        , PRSPI);

    SPCR = _BV(SPE) | _BV(MSTR) | (spiRate >> 1);
    SPSR = spiRate & 1 || spiRate == 6 ? 0 : _BV(SPI2X);
@@ -89,7 +88,7 @@ void spiBegin() {
  }

  /** SPI read data  */
-  void spiRead(uint8_t *buf, uint16_t nbyte) {
+  void spiRead(uint8_t* buf, uint16_t nbyte) {
    if (nbyte-- == 0) return;
    SPDR = 0xFF;
    for (uint16_t i = 0; i < nbyte; i++) {
@@ -108,7 +107,7 @@ void spiBegin() {
  }

  /** SPI send block  */
-  void spiSendBlock(uint8_t token, const uint8_t *buf) {
+  void spiSendBlock(uint8_t token, const uint8_t* buf) {
    SPDR = token;
    for (uint16_t i = 0; i < 512; i += 2) {
      while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
@@ -196,19 +195,19 @@ void spiBegin() {
    // no interrupts during byte receive - about 8µs
    cli();
    // output pin high - like sending 0xFF
-    WRITE(SD_MOSI_PIN, HIGH);
+    WRITE(MOSI_PIN, HIGH);

-    LOOP_L_N(i, 8) {
-      WRITE(SD_SCK_PIN, HIGH);
+    for (uint8_t i = 0; i < 8; i++) {
+      WRITE(SCK_PIN, HIGH);

      nop; // adjust so SCK is nice
      nop;

      data <<= 1;

-      if (READ(SD_MISO_PIN)) data |= 1;
+      if (READ(MISO_PIN)) data |= 1;

-      WRITE(SD_SCK_PIN, LOW);
+      WRITE(SCK_PIN, LOW);
    }

    sei();
@@ -216,7 +215,7 @@ void spiBegin() {
  }

  // Soft SPI read data
-  void spiRead(uint8_t *buf, uint16_t nbyte) {
+  void spiRead(uint8_t* buf, uint16_t nbyte) {
    for (uint16_t i = 0; i < nbyte; i++)
      buf[i] = spiRec();
  }
@@ -225,11 +224,11 @@ void spiBegin() {
  void spiSend(uint8_t data) {
    // no interrupts during byte send - about 8µs
    cli();
-    LOOP_L_N(i, 8) {
-      WRITE(SD_SCK_PIN, LOW);
-      WRITE(SD_MOSI_PIN, data & 0x80);
+    for (uint8_t i = 0; i < 8; i++) {
+      WRITE(SCK_PIN, LOW);
+      WRITE(MOSI_PIN, data & 0x80);
      data <<= 1;
-      WRITE(SD_SCK_PIN, HIGH);
+      WRITE(SCK_PIN, HIGH);
    }

    nop; // hold SCK high for a few ns
@@ -237,13 +236,13 @@ void spiBegin() {
    nop;
    nop;

-    WRITE(SD_SCK_PIN, LOW);
+    WRITE(SCK_PIN, LOW);

    sei();
  }

  // Soft SPI send block
-  void spiSendBlock(uint8_t token, const uint8_t *buf) {
+  void spiSendBlock(uint8_t token, const uint8_t* buf) {
    spiSend(token);
    for (uint16_t i = 0; i < 512; i++)
      spiSend(buf[i]);
--- a/Marlin/src/HAL/HAL_AVR/MarlinSerial.cpp
+++ b/Marlin/src/HAL/HAL_AVR/MarlinSerial.cpp
@@ -0,0 +1,792 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * MarlinSerial.cpp - Hardware serial library for Wiring
+ * Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+ *
+ * Modified 23 November 2006 by David A. Mellis
+ * Modified 28 September 2010 by Mark Sproul
+ * Modified 14 February 2016 by Andreas Hardtung (added tx buffer)
+ * Modified 01 October 2017 by Eduardo José Tagle (added XON/XOFF)
+ * Modified 10 June 2018 by Eduardo José Tagle (See #10991)
+ * Templatized 01 October 2018 by Eduardo José Tagle to allow multiple instances
+ */
+
+#ifdef __AVR__
+
+// Disable HardwareSerial.cpp to support chips without a UART (Attiny, etc.)
+
+#include "../../inc/MarlinConfig.h"
+
+#if !defined(USBCON) && (defined(UBRRH) || defined(UBRR0H) || defined(UBRR1H) || defined(UBRR2H) || defined(UBRR3H))
+
+  #include "MarlinSerial.h"
+  #include "../../MarlinCore.h"
+
+  template<typename Cfg> typename MarlinSerial<Cfg>::ring_buffer_r MarlinSerial<Cfg>::rx_buffer = { 0, 0, { 0 } };
+  template<typename Cfg> typename MarlinSerial<Cfg>::ring_buffer_t MarlinSerial<Cfg>::tx_buffer = { 0 };
+  template<typename Cfg> bool     MarlinSerial<Cfg>::_written = false;
+  template<typename Cfg> uint8_t  MarlinSerial<Cfg>::xon_xoff_state = MarlinSerial<Cfg>::XON_XOFF_CHAR_SENT | MarlinSerial<Cfg>::XON_CHAR;
+  template<typename Cfg> uint8_t  MarlinSerial<Cfg>::rx_dropped_bytes = 0;
+  template<typename Cfg> uint8_t  MarlinSerial<Cfg>::rx_buffer_overruns = 0;
+  template<typename Cfg> uint8_t  MarlinSerial<Cfg>::rx_framing_errors = 0;
+  template<typename Cfg> typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::rx_max_enqueued = 0;
+
+  // A SW memory barrier, to ensure GCC does not overoptimize loops
+  #define sw_barrier() asm volatile("": : :"memory");
+
+  #include "../../feature/emergency_parser.h"
+
+  // "Atomically" read the RX head index value without disabling interrupts:
+  // This MUST be called with RX interrupts enabled, and CAN'T be called
+  // from the RX ISR itself!
+  template<typename Cfg>
+  FORCE_INLINE typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::atomic_read_rx_head() {
+    if (Cfg::RX_SIZE > 256) {
+      // Keep reading until 2 consecutive reads return the same value,
+      // meaning there was no update in-between caused by an interrupt.
+      // This works because serial RX interrupts happen at a slower rate
+      // than successive reads of a variable, so 2 consecutive reads with
+      // the same value means no interrupt updated it.
+      ring_buffer_pos_t vold, vnew = rx_buffer.head;
+      sw_barrier();
+      do {
+        vold = vnew;
+        vnew = rx_buffer.head;
+        sw_barrier();
+      } while (vold != vnew);
+      return vnew;
+    }
+    else {
+      // With an 8bit index, reads are always atomic. No need for special handling
+      return rx_buffer.head;
+    }
+  }
+
+  template<typename Cfg>
+  volatile bool MarlinSerial<Cfg>::rx_tail_value_not_stable = false;
+  template<typename Cfg>
+  volatile uint16_t MarlinSerial<Cfg>::rx_tail_value_backup = 0;
+
+  // Set RX tail index, taking into account the RX ISR could interrupt
+  //  the write to this variable in the middle - So a backup strategy
+  //  is used to ensure reads of the correct values.
+  //    -Must NOT be called from the RX ISR -
+  template<typename Cfg>
+  FORCE_INLINE void MarlinSerial<Cfg>::atomic_set_rx_tail(typename MarlinSerial<Cfg>::ring_buffer_pos_t value) {
+    if (Cfg::RX_SIZE > 256) {
+      // Store the new value in the backup
+      rx_tail_value_backup = value;
+      sw_barrier();
+      // Flag we are about to change the true value
+      rx_tail_value_not_stable = true;
+      sw_barrier();
+      // Store the new value
+      rx_buffer.tail = value;
+      sw_barrier();
+      // Signal the new value is completely stored into the value
+      rx_tail_value_not_stable = false;
+      sw_barrier();
+    }
+    else
+      rx_buffer.tail = value;
+  }
+
+  // Get the RX tail index, taking into account the read could be
+  //  interrupting in the middle of the update of that index value
+  //    -Called from the RX ISR -
+  template<typename Cfg>
+  FORCE_INLINE typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::atomic_read_rx_tail() {
+    if (Cfg::RX_SIZE > 256) {
+      // If the true index is being modified, return the backup value
+      if (rx_tail_value_not_stable) return rx_tail_value_backup;
+    }
+    // The true index is stable, return it
+    return rx_buffer.tail;
+  }
+
+  // (called with RX interrupts disabled)
+  template<typename Cfg>
+  FORCE_INLINE void MarlinSerial<Cfg>::store_rxd_char() {
+
+    static EmergencyParser::State emergency_state; // = EP_RESET
+
+    // Get the tail - Nothing can alter its value while this ISR is executing, but there's
+    // a chance that this ISR interrupted the main process while it was updating the index.
+    // The backup mechanism ensures the correct value is always returned.
+    const ring_buffer_pos_t t = atomic_read_rx_tail();
+
+    // Get the head pointer - This ISR is the only one that modifies its value, so it's safe to read here
+    ring_buffer_pos_t h = rx_buffer.head;
+
+    // Get the next element
+    ring_buffer_pos_t i = (ring_buffer_pos_t)(h + 1) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
+
+    // This must read the R_UCSRA register before reading the received byte to detect error causes
+    if (Cfg::DROPPED_RX && B_DOR && !++rx_dropped_bytes) --rx_dropped_bytes;
+    if (Cfg::RX_OVERRUNS && B_DOR && !++rx_buffer_overruns) --rx_buffer_overruns;
+    if (Cfg::RX_FRAMING_ERRORS && B_FE && !++rx_framing_errors) --rx_framing_errors;
+
+    // Read the character from the USART
+    uint8_t c = R_UDR;
+
+    if (Cfg::EMERGENCYPARSER) emergency_parser.update(emergency_state, c);
+
+    // If the character is to be stored at the index just before the tail
+    // (such that the head would advance to the current tail), the RX FIFO is
+    // full, so don't write the character or advance the head.
+    if (i != t) {
+      rx_buffer.buffer[h] = c;
+      h = i;
+    }
+    else if (Cfg::DROPPED_RX && !++rx_dropped_bytes)
+      --rx_dropped_bytes;
+
+    if (Cfg::MAX_RX_QUEUED) {
+      // Calculate count of bytes stored into the RX buffer
+      const ring_buffer_pos_t rx_count = (ring_buffer_pos_t)(h - t) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
+
+      // Keep track of the maximum count of enqueued bytes
+      NOLESS(rx_max_enqueued, rx_count);
+    }
+
+    if (Cfg::XONOFF) {
+      // If the last char that was sent was an XON
+      if ((xon_xoff_state & XON_XOFF_CHAR_MASK) == XON_CHAR) {
+
+        // Bytes stored into the RX buffer
+        const ring_buffer_pos_t rx_count = (ring_buffer_pos_t)(h - t) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
+
+        // If over 12.5% of RX buffer capacity, send XOFF before running out of
+        // RX buffer space .. 325 bytes @ 250kbits/s needed to let the host react
+        // and stop sending bytes. This translates to 13mS propagation time.
+        if (rx_count >= (Cfg::RX_SIZE) / 8) {
+
+          // At this point, definitely no TX interrupt was executing, since the TX ISR can't be preempted.
+          // Don't enable the TX interrupt here as a means to trigger the XOFF char, because if it happens
+          // to be in the middle of trying to disable the RX interrupt in the main program, eventually the
+          // enabling of the TX interrupt could be undone. The ONLY reliable thing this can do to ensure
+          // the sending of the XOFF char is to send it HERE AND NOW.
+
+          // About to send the XOFF char
+          xon_xoff_state = XOFF_CHAR | XON_XOFF_CHAR_SENT;
+
+          // Wait until the TX register becomes empty and send it - Here there could be a problem
+          // - While waiting for the TX register to empty, the RX register could receive a new
+          //   character. This must also handle that situation!
+          while (!B_UDRE) {
+
+            if (B_RXC) {
+              // A char arrived while waiting for the TX buffer to be empty - Receive and process it!
+
+              i = (ring_buffer_pos_t)(h + 1) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
+
+              // Read the character from the USART
+              c = R_UDR;
+
+              if (Cfg::EMERGENCYPARSER) emergency_parser.update(emergency_state, c);
+
+              // If the character is to be stored at the index just before the tail
+              // (such that the head would advance to the current tail), the FIFO is
+              // full, so don't write the character or advance the head.
+              if (i != t) {
+                rx_buffer.buffer[h] = c;
+                h = i;
+              }
+              else if (Cfg::DROPPED_RX && !++rx_dropped_bytes)
+                --rx_dropped_bytes;
+            }
+            sw_barrier();
+          }
+
+          R_UDR = XOFF_CHAR;
+
+          // Clear the TXC bit -- "can be cleared by writing a one to its bit
+          // location". This makes sure flush() won't return until the bytes
+          // actually got written
+          B_TXC = 1;
+
+          // At this point there could be a race condition between the write() function
+          // and this sending of the XOFF char. This interrupt could happen between the
+          // wait to be empty TX buffer loop and the actual write of the character. Since
+          // the TX buffer is full because it's sending the XOFF char, the only way to be
+          // sure the write() function will succeed is to wait for the XOFF char to be
+          // completely sent. Since an extra character could be received during the wait
+          // it must also be handled!
+          while (!B_UDRE) {
+
+            if (B_RXC) {
+              // A char arrived while waiting for the TX buffer to be empty - Receive and process it!
+
+              i = (ring_buffer_pos_t)(h + 1) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
+
+              // Read the character from the USART
+              c = R_UDR;
+
+              if (Cfg::EMERGENCYPARSER)
+                emergency_parser.update(emergency_state, c);
+
+              // If the character is to be stored at the index just before the tail
+              // (such that the head would advance to the current tail), the FIFO is
+              // full, so don't write the character or advance the head.
+              if (i != t) {
+                rx_buffer.buffer[h] = c;
+                h = i;
+              }
+              else if (Cfg::DROPPED_RX && !++rx_dropped_bytes)
+                --rx_dropped_bytes;
+            }
+            sw_barrier();
+          }
+
+          // At this point everything is ready. The write() function won't
+          // have any issues writing to the UART TX register if it needs to!
+        }
+      }
+    }
+
+    // Store the new head value - The main loop will retry until the value is stable
+    rx_buffer.head = h;
+  }
+
+  // (called with TX irqs disabled)
+  template<typename Cfg>
+  FORCE_INLINE void MarlinSerial<Cfg>::_tx_udr_empty_irq() {
+    if (Cfg::TX_SIZE > 0) {
+      // Read positions
+      uint8_t t = tx_buffer.tail;
+      const uint8_t h = tx_buffer.head;
+
+      if (Cfg::XONOFF) {
+        // If an XON char is pending to be sent, do it now
+        if (xon_xoff_state == XON_CHAR) {
+
+          // Send the character
+          R_UDR = XON_CHAR;
+
+          // clear the TXC bit -- "can be cleared by writing a one to its bit
+          // location". This makes sure flush() won't return until the bytes
+          // actually got written
+          B_TXC = 1;
+
+          // Remember we sent it.
+          xon_xoff_state = XON_CHAR | XON_XOFF_CHAR_SENT;
+
+          // If nothing else to transmit, just disable TX interrupts.
+          if (h == t) B_UDRIE = 0; // (Non-atomic, could be reenabled by the main program, but eventually this will succeed)
+
+          return;
+        }
+      }
+
+      // If nothing to transmit, just disable TX interrupts. This could
+      // happen as the result of the non atomicity of the disabling of RX
+      // interrupts that could end reenabling TX interrupts as a side effect.
+      if (h == t) {
+        B_UDRIE = 0; // (Non-atomic, could be reenabled by the main program, but eventually this will succeed)
+        return;
+      }
+
+      // There is something to TX, Send the next byte
+      const uint8_t c = tx_buffer.buffer[t];
+      t = (t + 1) & (Cfg::TX_SIZE - 1);
+      R_UDR = c;
+      tx_buffer.tail = t;
+
+      // Clear the TXC bit (by writing a one to its bit location).
+      // Ensures flush() won't return until the bytes are actually written/
+      B_TXC = 1;
+
+      // Disable interrupts if there is nothing to transmit following this byte
+      if (h == t) B_UDRIE = 0; // (Non-atomic, could be reenabled by the main program, but eventually this will succeed)
+    }
+  }
+
+  // Public Methods
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::begin(const long baud) {
+    uint16_t baud_setting;
+    bool useU2X = true;
+
+    #if F_CPU == 16000000UL && SERIAL_PORT == 0
+      // Hard-coded exception for compatibility with the bootloader shipped
+      // with the Duemilanove and previous boards, and the firmware on the
+      // 8U2 on the Uno and Mega 2560.
+      if (baud == 57600) useU2X = false;
+    #endif
+
+    R_UCSRA = 0;
+    if (useU2X) {
+      B_U2X = 1;
+      baud_setting = (F_CPU / 4 / baud - 1) / 2;
+    }
+    else
+      baud_setting = (F_CPU / 8 / baud - 1) / 2;
+
+    // assign the baud_setting, a.k.a. ubbr (USART Baud Rate Register)
+    R_UBRRH = baud_setting >> 8;
+    R_UBRRL = baud_setting;
+
+    B_RXEN = 1;
+    B_TXEN = 1;
+    B_RXCIE = 1;
+    if (Cfg::TX_SIZE > 0) B_UDRIE = 0;
+    _written = false;
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::end() {
+    B_RXEN = 0;
+    B_TXEN = 0;
+    B_RXCIE = 0;
+    B_UDRIE = 0;
+  }
+
+  template<typename Cfg>
+  int MarlinSerial<Cfg>::peek() {
+    const ring_buffer_pos_t h = atomic_read_rx_head(), t = rx_buffer.tail;
+    return h == t ? -1 : rx_buffer.buffer[t];
+  }
+
+  template<typename Cfg>
+  int MarlinSerial<Cfg>::read() {
+    const ring_buffer_pos_t h = atomic_read_rx_head();
+
+    // Read the tail. Main thread owns it, so it is safe to directly read it
+    ring_buffer_pos_t t = rx_buffer.tail;
+
+    // If nothing to read, return now
+    if (h == t) return -1;
+
+    // Get the next char
+    const int v = rx_buffer.buffer[t];
+    t = (ring_buffer_pos_t)(t + 1) & (Cfg::RX_SIZE - 1);
+
+    // Advance tail - Making sure the RX ISR will always get an stable value, even
+    // if it interrupts the writing of the value of that variable in the middle.
+    atomic_set_rx_tail(t);
+
+    if (Cfg::XONOFF) {
+      // If the XOFF char was sent, or about to be sent...
+      if ((xon_xoff_state & XON_XOFF_CHAR_MASK) == XOFF_CHAR) {
+        // Get count of bytes in the RX buffer
+        const ring_buffer_pos_t rx_count = (ring_buffer_pos_t)(h - t) & (ring_buffer_pos_t)(Cfg::RX_SIZE - 1);
+        if (rx_count < (Cfg::RX_SIZE) / 10) {
+          if (Cfg::TX_SIZE > 0) {
+            // Signal we want an XON character to be sent.
+            xon_xoff_state = XON_CHAR;
+            // Enable TX ISR. Non atomic, but it will eventually enable them
+            B_UDRIE = 1;
+          }
+          else {
+            // If not using TX interrupts, we must send the XON char now
+            xon_xoff_state = XON_CHAR | XON_XOFF_CHAR_SENT;
+            while (!B_UDRE) sw_barrier();
+            R_UDR = XON_CHAR;
+          }
+        }
+      }
+    }
+
+    return v;
+  }
+
+  template<typename Cfg>
+  typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::available() {
+    const ring_buffer_pos_t h = atomic_read_rx_head(), t = rx_buffer.tail;
+    return (ring_buffer_pos_t)(Cfg::RX_SIZE + h - t) & (Cfg::RX_SIZE - 1);
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::flush() {
+
+    // Set the tail to the head:
+    //  - Read the RX head index in a safe way. (See atomic_read_rx_head.)
+    //  - Set the tail, making sure the RX ISR will always get a stable value, even
+    //    if it interrupts the writing of the value of that variable in the middle.
+    atomic_set_rx_tail(atomic_read_rx_head());
+
+    if (Cfg::XONOFF) {
+      // If the XOFF char was sent, or about to be sent...
+      if ((xon_xoff_state & XON_XOFF_CHAR_MASK) == XOFF_CHAR) {
+        if (Cfg::TX_SIZE > 0) {
+          // Signal we want an XON character to be sent.
+          xon_xoff_state = XON_CHAR;
+          // Enable TX ISR. Non atomic, but it will eventually enable it.
+          B_UDRIE = 1;
+        }
+        else {
+          // If not using TX interrupts, we must send the XON char now
+          xon_xoff_state = XON_CHAR | XON_XOFF_CHAR_SENT;
+          while (!B_UDRE) sw_barrier();
+          R_UDR = XON_CHAR;
+        }
+      }
+    }
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::write(const uint8_t c) {
+    if (Cfg::TX_SIZE == 0) {
+
+      _written = true;
+      while (!B_UDRE) sw_barrier();
+      R_UDR = c;
+
+    }
+    else {
+
+      _written = true;
+
+      // If the TX interrupts are disabled and the data register
+      // is empty, just write the byte to the data register and
+      // be done. This shortcut helps significantly improve the
+      // effective datarate at high (>500kbit/s) bitrates, where
+      // interrupt overhead becomes a slowdown.
+      // Yes, there is a race condition between the sending of the
+      // XOFF char at the RX ISR, but it is properly handled there
+      if (!B_UDRIE && B_UDRE) {
+        R_UDR = c;
+
+        // clear the TXC bit -- "can be cleared by writing a one to its bit
+        // location". This makes sure flush() won't return until the bytes
+        // actually got written
+        B_TXC = 1;
+        return;
+      }
+
+      const uint8_t i = (tx_buffer.head + 1) & (Cfg::TX_SIZE - 1);
+
+      // If global interrupts are disabled (as the result of being called from an ISR)...
+      if (!ISRS_ENABLED()) {
+
+        // Make room by polling if it is possible to transmit, and do so!
+        while (i == tx_buffer.tail) {
+
+          // If we can transmit another byte, do it.
+          if (B_UDRE) _tx_udr_empty_irq();
+
+          // Make sure compiler rereads tx_buffer.tail
+          sw_barrier();
+        }
+      }
+      else {
+        // Interrupts are enabled, just wait until there is space
+        while (i == tx_buffer.tail) sw_barrier();
+      }
+
+      // Store new char. head is always safe to move
+      tx_buffer.buffer[tx_buffer.head] = c;
+      tx_buffer.head = i;
+
+      // Enable TX ISR - Non atomic, but it will eventually enable TX ISR
+      B_UDRIE = 1;
+    }
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::flushTX() {
+
+    if (Cfg::TX_SIZE == 0) {
+      // No bytes written, no need to flush. This special case is needed since there's
+      // no way to force the TXC (transmit complete) bit to 1 during initialization.
+      if (!_written) return;
+
+      // Wait until everything was transmitted
+      while (!B_TXC) sw_barrier();
+
+      // At this point nothing is queued anymore (DRIE is disabled) and
+      // the hardware finished transmission (TXC is set).
+
+    }
+    else {
+
+      // No bytes written, no need to flush. This special case is needed since there's
+      // no way to force the TXC (transmit complete) bit to 1 during initialization.
+      if (!_written) return;
+
+      // If global interrupts are disabled (as the result of being called from an ISR)...
+      if (!ISRS_ENABLED()) {
+
+        // Wait until everything was transmitted - We must do polling, as interrupts are disabled
+        while (tx_buffer.head != tx_buffer.tail || !B_TXC) {
+
+          // If there is more space, send an extra character
+          if (B_UDRE) _tx_udr_empty_irq();
+
+          sw_barrier();
+        }
+
+      }
+      else {
+        // Wait until everything was transmitted
+        while (tx_buffer.head != tx_buffer.tail || !B_TXC) sw_barrier();
+      }
+
+      // At this point nothing is queued anymore (DRIE is disabled) and
+      // the hardware finished transmission (TXC is set).
+    }
+  }
+
+  /**
+   * Imports from print.h
+   */
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::print(char c, int base) {
+    print((long)c, base);
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::print(unsigned char b, int base) {
+    print((unsigned long)b, base);
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::print(int n, int base) {
+    print((long)n, base);
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::print(unsigned int n, int base) {
+    print((unsigned long)n, base);
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::print(long n, int base) {
+    if (base == 0) write(n);
+    else if (base == 10) {
+      if (n < 0) { print('-'); n = -n; }
+      printNumber(n, 10);
+    }
+    else
+      printNumber(n, base);
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::print(unsigned long n, int base) {
+    if (base == 0) write(n);
+    else printNumber(n, base);
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::print(double n, int digits) {
+    printFloat(n, digits);
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::println() {
+    print('\r');
+    print('\n');
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::println(const String& s) {
+    print(s);
+    println();
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::println(const char c[]) {
+    print(c);
+    println();
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::println(char c, int base) {
+    print(c, base);
+    println();
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::println(unsigned char b, int base) {
+    print(b, base);
+    println();
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::println(int n, int base) {
+    print(n, base);
+    println();
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::println(unsigned int n, int base) {
+    print(n, base);
+    println();
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::println(long n, int base) {
+    print(n, base);
+    println();
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::println(unsigned long n, int base) {
+    print(n, base);
+    println();
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::println(double n, int digits) {
+    print(n, digits);
+    println();
+  }
+
+  // Private Methods
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::printNumber(unsigned long n, uint8_t base) {
+    if (n) {
+      unsigned char buf[8 * sizeof(long)]; // Enough space for base 2
+      int8_t i = 0;
+      while (n) {
+        buf[i++] = n % base;
+        n /= base;
+      }
+      while (i--)
+        print((char)(buf[i] + (buf[i] < 10 ? '0' : 'A' - 10)));
+    }
+    else
+      print('0');
+  }
+
+  template<typename Cfg>
+  void MarlinSerial<Cfg>::printFloat(double number, uint8_t digits) {
+    // Handle negative numbers
+    if (number < 0.0) {
+      print('-');
+      number = -number;
+    }
+
+    // Round correctly so that print(1.999, 2) prints as "2.00"
+    double rounding = 0.5;
+    for (uint8_t i = 0; i < digits; ++i) rounding *= 0.1;
+    number += rounding;
+
+    // Extract the integer part of the number and print it
+    unsigned long int_part = (unsigned long)number;
+    double remainder = number - (double)int_part;
+    print(int_part);
+
+    // Print the decimal point, but only if there are digits beyond
+    if (digits) {
+      print('.');
+      // Extract digits from the remainder one at a time
+      while (digits--) {
+        remainder *= 10.0;
+        int toPrint = int(remainder);
+        print(toPrint);
+        remainder -= toPrint;
+      }
+    }
+  }
+
+  // Hookup ISR handlers
+  ISR(SERIAL_REGNAME(USART,SERIAL_PORT,_RX_vect)) {
+    MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>::store_rxd_char();
+  }
+
+  ISR(SERIAL_REGNAME(USART,SERIAL_PORT,_UDRE_vect)) {
+    MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>::_tx_udr_empty_irq();
+  }
+
+  // Preinstantiate
+  template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>;
+
+  // Instantiate
+  MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
+
+  #ifdef SERIAL_PORT_2
+
+    // Hookup ISR handlers
+    ISR(SERIAL_REGNAME(USART,SERIAL_PORT_2,_RX_vect)) {
+      MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>::store_rxd_char();
+    }
+
+    ISR(SERIAL_REGNAME(USART,SERIAL_PORT_2,_UDRE_vect)) {
+      MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>::_tx_udr_empty_irq();
+    }
+
+    // Preinstantiate
+    template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>;
+
+    // Instantiate
+    MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2;
+
+  #endif
+
+#endif // !USBCON && (UBRRH || UBRR0H || UBRR1H || UBRR2H || UBRR3H)
+
+#ifdef INTERNAL_SERIAL_PORT
+
+  ISR(SERIAL_REGNAME(USART,INTERNAL_SERIAL_PORT,_RX_vect)) {
+    MarlinSerial<MarlinInternalSerialCfg<INTERNAL_SERIAL_PORT>>::store_rxd_char();
+  }
+
+  ISR(SERIAL_REGNAME(USART,INTERNAL_SERIAL_PORT,_UDRE_vect)) {
+    MarlinSerial<MarlinInternalSerialCfg<INTERNAL_SERIAL_PORT>>::_tx_udr_empty_irq();
+  }
+
+  // Preinstantiate
+  template class MarlinSerial<MarlinInternalSerialCfg<INTERNAL_SERIAL_PORT>>;
+
+  // Instantiate
+  MarlinSerial<MarlinInternalSerialCfg<INTERNAL_SERIAL_PORT>> internalSerial;
+
+#endif
+
+#ifdef DGUS_SERIAL_PORT
+
+  template<typename Cfg>
+  typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::get_tx_buffer_free() {
+    const ring_buffer_pos_t t = tx_buffer.tail,  // next byte to send.
+                            h = tx_buffer.head;  // next pos for queue.
+    int ret = t - h - 1;
+    if (ret < 0) ret += Cfg::TX_SIZE + 1;
+    return ret;
+  }
+
+  ISR(SERIAL_REGNAME(USART,DGUS_SERIAL_PORT,_RX_vect)) {
+    MarlinSerial<MarlinInternalSerialCfg<DGUS_SERIAL_PORT>>::store_rxd_char();
+  }
+
+  ISR(SERIAL_REGNAME(USART,DGUS_SERIAL_PORT,_UDRE_vect)) {
+    MarlinSerial<MarlinInternalSerialCfg<DGUS_SERIAL_PORT>>::_tx_udr_empty_irq();
+  }
+
+  // Preinstantiate
+  template class MarlinSerial<MarlinInternalSerialCfg<DGUS_SERIAL_PORT>>;
+
+  // Instantiate
+  MarlinSerial<MarlinInternalSerialCfg<DGUS_SERIAL_PORT>> internalDgusSerial;
+
+#endif
+
+// For AT90USB targets use the UART for BT interfacing
+#if defined(USBCON) && ENABLED(BLUETOOTH)
+  HardwareSerial bluetoothSerial;
+#endif
+
+#endif // __AVR__
--- a/Marlin/src/HAL/HAL_AVR/MarlinSerial.h
+++ b/Marlin/src/HAL/HAL_AVR/MarlinSerial.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -31,10 +31,9 @@
 * Templatized 01 October 2018 by Eduardo José Tagle to allow multiple instances
 */

-#include <WString.h>
+#include "../shared/MarlinSerial.h"

-#include "../../inc/MarlinConfigPre.h"
-#include "../../core/serial_hook.h"
+#include <WString.h>

 #ifndef SERIAL_PORT
  #define SERIAL_PORT 0
@@ -49,11 +48,11 @@

  // These are macros to build serial port register names for the selected SERIAL_PORT (C preprocessor
  // requires two levels of indirection to expand macro values properly)
-  #define SERIAL_REGNAME(registerbase,number,suffix) _SERIAL_REGNAME(registerbase,number,suffix)
+  #define SERIAL_REGNAME(registerbase,number,suffix) SERIAL_REGNAME_INTERNAL(registerbase,number,suffix)
  #if SERIAL_PORT == 0 && (!defined(UBRR0H) || !defined(UDR0)) // use un-numbered registers if necessary
-    #define _SERIAL_REGNAME(registerbase,number,suffix) registerbase##suffix
+    #define SERIAL_REGNAME_INTERNAL(registerbase,number,suffix) registerbase##suffix
  #else
-    #define _SERIAL_REGNAME(registerbase,number,suffix) registerbase##number##suffix
+    #define SERIAL_REGNAME_INTERNAL(registerbase,number,suffix) registerbase##number##suffix
  #endif

  // Registers used by MarlinSerial class (expanded depending on selected serial port)
@@ -136,6 +135,10 @@
    UART_DECL(3);
  #endif

+  #define DEC 10
+  #define HEX 16
+  #define OCT 8
+  #define BIN 2
  #define BYTE 0

  // Templated type selector
@@ -191,38 +194,66 @@
                   rx_framing_errors;
    static ring_buffer_pos_t rx_max_enqueued;

-    FORCE_INLINE static ring_buffer_pos_t atomic_read_rx_head();
+    static FORCE_INLINE ring_buffer_pos_t atomic_read_rx_head();

    static volatile bool rx_tail_value_not_stable;
    static volatile uint16_t rx_tail_value_backup;

-    FORCE_INLINE static void atomic_set_rx_tail(ring_buffer_pos_t value);
-    FORCE_INLINE static ring_buffer_pos_t atomic_read_rx_tail();
+    static FORCE_INLINE void atomic_set_rx_tail(ring_buffer_pos_t value);
+    static FORCE_INLINE ring_buffer_pos_t atomic_read_rx_tail();
+
+    public:

-  public:
    FORCE_INLINE static void store_rxd_char();
    FORCE_INLINE static void _tx_udr_empty_irq();

-  public:
-    static void begin(const long);
-    static void end();
-    static int peek();
-    static int read();
-    static void flush();
-    static ring_buffer_pos_t available();
-    static void write(const uint8_t c);
-    static void flushTX();
-    #if HAS_DGUS_LCD
-      static ring_buffer_pos_t get_tx_buffer_free();
-    #endif
+    public:
+      MarlinSerial() {};
+      static void begin(const long);
+      static void end();
+      static int peek();
+      static int read();
+      static void flush();
+      static ring_buffer_pos_t available();
+      static void write(const uint8_t c);
+      static void flushTX();
+      #ifdef DGUS_SERIAL_PORT
+        static ring_buffer_pos_t get_tx_buffer_free();
+      #endif

-    enum { HasEmergencyParser = Cfg::EMERGENCYPARSER };
-    static bool emergency_parser_enabled() { return Cfg::EMERGENCYPARSER; }
+      FORCE_INLINE static uint8_t dropped() { return Cfg::DROPPED_RX ? rx_dropped_bytes : 0; }
+      FORCE_INLINE static uint8_t buffer_overruns() { return Cfg::RX_OVERRUNS ? rx_buffer_overruns : 0; }
+      FORCE_INLINE static uint8_t framing_errors() { return Cfg::RX_FRAMING_ERRORS ? rx_framing_errors : 0; }
+      FORCE_INLINE static ring_buffer_pos_t rxMaxEnqueued() { return Cfg::MAX_RX_QUEUED ? rx_max_enqueued : 0; }

-    FORCE_INLINE static uint8_t dropped() { return Cfg::DROPPED_RX ? rx_dropped_bytes : 0; }
-    FORCE_INLINE static uint8_t buffer_overruns() { return Cfg::RX_OVERRUNS ? rx_buffer_overruns : 0; }
-    FORCE_INLINE static uint8_t framing_errors() { return Cfg::RX_FRAMING_ERRORS ? rx_framing_errors : 0; }
-    FORCE_INLINE static ring_buffer_pos_t rxMaxEnqueued() { return Cfg::MAX_RX_QUEUED ? rx_max_enqueued : 0; }
+      FORCE_INLINE static void write(const char* str) { while (*str) write(*str++); }
+      FORCE_INLINE static void write(const uint8_t* buffer, size_t size) { while (size--) write(*buffer++); }
+      FORCE_INLINE static void print(const String& s) { for (int i = 0; i < (int)s.length(); i++) write(s[i]); }
+      FORCE_INLINE static void print(const char* str) { write(str); }
+
+      static void print(char, int = BYTE);
+      static void print(unsigned char, int = BYTE);
+      static void print(int, int = DEC);
+      static void print(unsigned int, int = DEC);
+      static void print(long, int = DEC);
+      static void print(unsigned long, int = DEC);
+      static void print(double, int = 2);
+
+      static void println(const String& s);
+      static void println(const char[]);
+      static void println(char, int = BYTE);
+      static void println(unsigned char, int = BYTE);
+      static void println(int, int = DEC);
+      static void println(unsigned int, int = DEC);
+      static void println(long, int = DEC);
+      static void println(unsigned long, int = DEC);
+      static void println(double, int = 2);
+      static void println();
+      operator bool() { return true; }
+
+    private:
+      static void printNumber(unsigned long, const uint8_t);
+      static void printFloat(double, uint8_t);
  };

  template <uint8_t serial>
@@ -230,68 +261,58 @@
    static constexpr int PORT               = serial;
    static constexpr unsigned int RX_SIZE   = RX_BUFFER_SIZE;
    static constexpr unsigned int TX_SIZE   = TX_BUFFER_SIZE;
-    static constexpr bool XONOFF            = ENABLED(SERIAL_XON_XOFF);
-    static constexpr bool EMERGENCYPARSER   = ENABLED(EMERGENCY_PARSER);
-    static constexpr bool DROPPED_RX        = ENABLED(SERIAL_STATS_DROPPED_RX);
-    static constexpr bool RX_OVERRUNS       = ENABLED(SERIAL_STATS_RX_BUFFER_OVERRUNS);
-    static constexpr bool RX_FRAMING_ERRORS = ENABLED(SERIAL_STATS_RX_FRAMING_ERRORS);
-    static constexpr bool MAX_RX_QUEUED     = ENABLED(SERIAL_STATS_MAX_RX_QUEUED);
+    static constexpr bool XONOFF            = bSERIAL_XON_XOFF;
+    static constexpr bool EMERGENCYPARSER   = bEMERGENCY_PARSER;
+    static constexpr bool DROPPED_RX        = bSERIAL_STATS_DROPPED_RX;
+    static constexpr bool RX_OVERRUNS       = bSERIAL_STATS_RX_BUFFER_OVERRUNS;
+    static constexpr bool RX_FRAMING_ERRORS = bSERIAL_STATS_RX_FRAMING_ERRORS;
+    static constexpr bool MAX_RX_QUEUED     = bSERIAL_STATS_MAX_RX_QUEUED;
  };
-
-  typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT> > > MSerialT1;
-  extern MSerialT1 customizedSerial1;
+  extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;

  #ifdef SERIAL_PORT_2
-    typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT_2> > > MSerialT2;
-    extern MSerialT2 customizedSerial2;
-  #endif

-  #ifdef SERIAL_PORT_3
-    typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT_3> > > MSerialT3;
-    extern MSerialT3 customizedSerial3;
+    extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2;
+
  #endif

 #endif // !USBCON

-#ifdef MMU2_SERIAL_PORT
+#ifdef INTERNAL_SERIAL_PORT
  template <uint8_t serial>
-  struct MMU2SerialCfg {
+  struct MarlinInternalSerialCfg {
    static constexpr int PORT               = serial;
    static constexpr unsigned int RX_SIZE   = 32;
    static constexpr unsigned int TX_SIZE   = 32;
    static constexpr bool XONOFF            = false;
    static constexpr bool EMERGENCYPARSER   = false;
    static constexpr bool DROPPED_RX        = false;
+    static constexpr bool RX_OVERRUNS       = false;
    static constexpr bool RX_FRAMING_ERRORS = false;
    static constexpr bool MAX_RX_QUEUED     = false;
-    static constexpr bool RX_OVERRUNS       = false;
  };

-  typedef Serial1Class< MarlinSerial< MMU2SerialCfg<MMU2_SERIAL_PORT> > > MSerialMMU2;
-  extern MSerialMMU2 mmuSerial;
+  extern MarlinSerial<MarlinInternalSerialCfg<INTERNAL_SERIAL_PORT>> internalSerial;
 #endif

-#ifdef LCD_SERIAL_PORT
-
+#ifdef DGUS_SERIAL_PORT
  template <uint8_t serial>
-  struct LCDSerialCfg {
+  struct MarlinInternalSerialCfg {
    static constexpr int PORT               = serial;
-    static constexpr unsigned int RX_SIZE   = TERN(HAS_DGUS_LCD, DGUS_RX_BUFFER_SIZE,  64);
-    static constexpr unsigned int TX_SIZE   = TERN(HAS_DGUS_LCD, DGUS_TX_BUFFER_SIZE, 128);
+    static constexpr unsigned int RX_SIZE   = 128;
+    static constexpr unsigned int TX_SIZE   = 48;
    static constexpr bool XONOFF            = false;
-    static constexpr bool EMERGENCYPARSER   = ENABLED(EMERGENCY_PARSER);
+    static constexpr bool EMERGENCYPARSER   = false;
    static constexpr bool DROPPED_RX        = false;
+    static constexpr bool RX_OVERRUNS       = bDGUS_SERIAL_STATS_RX_BUFFER_OVERRUNS;
    static constexpr bool RX_FRAMING_ERRORS = false;
    static constexpr bool MAX_RX_QUEUED     = false;
-    static constexpr bool RX_OVERRUNS       = BOTH(HAS_DGUS_LCD, SERIAL_STATS_RX_BUFFER_OVERRUNS);
  };

-  typedef Serial1Class< MarlinSerial< LCDSerialCfg<LCD_SERIAL_PORT> > > MSerialLCD;
-  extern MSerialLCD lcdSerial;
+  extern MarlinSerial<MarlinInternalSerialCfg<DGUS_SERIAL_PORT>> internalDgusSerial;
 #endif

 // Use the UART for Bluetooth in AT90USB configurations
 #if defined(USBCON) && ENABLED(BLUETOOTH)
-  typedef Serial1Class<HardwareSerial> MSerialBT;
-  extern MSerialBT bluetoothSerial;
+  extern HardwareSerial bluetoothSerial;
 #endif
--- a/Marlin/src/HAL/HAL_AVR/Servo.cpp
+++ b/Marlin/src/HAL/HAL_AVR/Servo.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -48,6 +48,7 @@
 * readMicroseconds()    - Get the last-written servo pulse width in microseconds.
 * attached()            - Return true if a servo is attached.
 * detach()              - Stop an attached servo from pulsing its i/o pin.
+ *
 */

 #ifdef __AVR__
@@ -58,6 +59,7 @@

 #include <avr/interrupt.h>

+#include "../shared/Marduino.h"
 #include "../shared/servo.h"
 #include "../shared/servo_private.h"

--- a/Marlin/src/HAL/HAL_AVR/ServoTimers.h
+++ b/Marlin/src/HAL/HAL_AVR/ServoTimers.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -59,12 +59,10 @@
 // Say which 16 bit timers can be used and in what order
 #if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
  //#define _useTimer1
+  #define _useTimer3
  #define _useTimer4
-  #if NUM_SERVOS > SERVOS_PER_TIMER
-    #define _useTimer3
-    #if !HAS_MOTOR_CURRENT_PWM && SERVOS > 2 * SERVOS_PER_TIMER
-      #define _useTimer5 // Timer 5 is used for motor current PWM and can't be used for servos.
-    #endif
+  #if !HAS_MOTOR_CURRENT_PWM
+    #define _useTimer5 // Timer 5 is used for motor current PWM and can't be used for servos.
  #endif
 #elif defined(__AVR_ATmega32U4__)
  #define _useTimer3
--- a/Marlin/src/HAL/HAL_AVR/endstop_interrupts.h
+++ b/Marlin/src/HAL/HAL_AVR/endstop_interrupts.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -124,7 +124,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(X_MAX_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(X_MAX_PIN);
    #else
-      static_assert(digitalPinHasPCICR(X_MAX_PIN), "X_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(X_MAX_PIN), "X_MAX_PIN is not interrupt-capable");
      pciSetup(X_MAX_PIN);
    #endif
  #endif
@@ -132,7 +132,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(X_MIN_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(X_MIN_PIN);
    #else
-      static_assert(digitalPinHasPCICR(X_MIN_PIN), "X_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(X_MIN_PIN), "X_MIN_PIN is not interrupt-capable");
      pciSetup(X_MIN_PIN);
    #endif
  #endif
@@ -140,7 +140,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Y_MAX_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Y_MAX_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Y_MAX_PIN), "Y_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Y_MAX_PIN), "Y_MAX_PIN is not interrupt-capable");
      pciSetup(Y_MAX_PIN);
    #endif
  #endif
@@ -148,7 +148,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Y_MIN_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Y_MIN_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Y_MIN_PIN), "Y_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Y_MIN_PIN), "Y_MIN_PIN is not interrupt-capable");
      pciSetup(Y_MIN_PIN);
    #endif
  #endif
@@ -156,7 +156,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Z_MAX_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Z_MAX_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Z_MAX_PIN), "Z_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Z_MAX_PIN), "Z_MAX_PIN is not interrupt-capable");
      pciSetup(Z_MAX_PIN);
    #endif
  #endif
@@ -164,105 +164,15 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Z_MIN_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Z_MIN_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Z_MIN_PIN), "Z_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Z_MIN_PIN), "Z_MIN_PIN is not interrupt-capable");
      pciSetup(Z_MIN_PIN);
    #endif
  #endif
-  #if HAS_I_MAX
-    #if (digitalPinToInterrupt(I_MAX_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(I_MAX_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(I_MAX_PIN), "I_MAX_PIN is not interrupt-capable");
-      pciSetup(I_MAX_PIN);
-    #endif
-  #elif HAS_I_MIN
-    #if (digitalPinToInterrupt(I_MIN_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(I_MIN_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(I_MIN_PIN), "I_MIN_PIN is not interrupt-capable");
-      pciSetup(I_MIN_PIN);
-    #endif
-  #endif
-  #if HAS_J_MAX
-    #if (digitalPinToInterrupt(J_MAX_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(J_MAX_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(J_MAX_PIN), "J_MAX_PIN is not interrupt-capable");
-      pciSetup(J_MAX_PIN);
-    #endif
-  #elif HAS_J_MIN
-    #if (digitalPinToInterrupt(J_MIN_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(J_MIN_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(J_MIN_PIN), "J_MIN_PIN is not interrupt-capable");
-      pciSetup(J_MIN_PIN);
-    #endif
-  #endif
-  #if HAS_K_MAX
-    #if (digitalPinToInterrupt(K_MAX_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(K_MAX_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(K_MAX_PIN), "K_MAX_PIN is not interrupt-capable");
-      pciSetup(K_MAX_PIN);
-    #endif
-  #elif HAS_K_MIN
-    #if (digitalPinToInterrupt(K_MIN_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(K_MIN_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(K_MIN_PIN), "K_MIN_PIN is not interrupt-capable");
-      pciSetup(K_MIN_PIN);
-    #endif
-  #endif
-  #if HAS_U_MAX
-    #if (digitalPinToInterrupt(U_MAX_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(U_MAX_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(U_MAX_PIN), "U_MAX_PIN is not interrupt-capable");
-      pciSetup(U_MAX_PIN);
-    #endif
-  #elif HAS_U_MIN
-    #if (digitalPinToInterrupt(U_MIN_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(U_MIN_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(U_MIN_PIN), "U_MIN_PIN is not interrupt-capable");
-      pciSetup(U_MIN_PIN);
-    #endif
-  #endif
-  #if HAS_V_MAX
-    #if (digitalPinToInterrupt(V_MAX_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(V_MAX_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(V_MAX_PIN), "V_MAX_PIN is not interrupt-capable");
-      pciSetup(V_MAX_PIN);
-    #endif
-  #elif HAS_V_MIN
-    #if (digitalPinToInterrupt(V_MIN_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(V_MIN_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(V_MIN_PIN), "V_MIN_PIN is not interrupt-capable");
-      pciSetup(V_MIN_PIN);
-    #endif
-  #endif
-  #if HAS_W_MAX
-    #if (digitalPinToInterrupt(W_MAX_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(W_MAX_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(W_MAX_PIN), "W_MAX_PIN is not interrupt-capable");
-      pciSetup(W_MAX_PIN);
-    #endif
-  #elif HAS_W_MIN
-    #if (digitalPinToInterrupt(W_MIN_PIN) != NOT_AN_INTERRUPT)
-      _ATTACH(W_MIN_PIN);
-    #else
-      static_assert(digitalPinHasPCICR(W_MIN_PIN), "W_MIN_PIN is not interrupt-capable");
-      pciSetup(W_MIN_PIN);
-    #endif
-  #endif
  #if HAS_X2_MAX
    #if (digitalPinToInterrupt(X2_MAX_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(X2_MAX_PIN);
    #else
-      static_assert(digitalPinHasPCICR(X2_MAX_PIN), "X2_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(X2_MAX_PIN), "X2_MAX_PIN is not interrupt-capable");
      pciSetup(X2_MAX_PIN);
    #endif
  #endif
@@ -270,7 +180,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(X2_MIN_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(X2_MIN_PIN);
    #else
-      static_assert(digitalPinHasPCICR(X2_MIN_PIN), "X2_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(X2_MIN_PIN), "X2_MIN_PIN is not interrupt-capable");
      pciSetup(X2_MIN_PIN);
    #endif
  #endif
@@ -278,7 +188,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Y2_MAX_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Y2_MAX_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Y2_MAX_PIN), "Y2_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Y2_MAX_PIN), "Y2_MAX_PIN is not interrupt-capable");
      pciSetup(Y2_MAX_PIN);
    #endif
  #endif
@@ -286,7 +196,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Y2_MIN_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Y2_MIN_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Y2_MIN_PIN), "Y2_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Y2_MIN_PIN), "Y2_MIN_PIN is not interrupt-capable");
      pciSetup(Y2_MIN_PIN);
    #endif
  #endif
@@ -294,7 +204,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Z2_MAX_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Z2_MAX_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Z2_MAX_PIN), "Z2_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Z2_MAX_PIN), "Z2_MAX_PIN is not interrupt-capable");
      pciSetup(Z2_MAX_PIN);
    #endif
  #endif
@@ -302,7 +212,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Z2_MIN_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Z2_MIN_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Z2_MIN_PIN), "Z2_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Z2_MIN_PIN), "Z2_MIN_PIN is not interrupt-capable");
      pciSetup(Z2_MIN_PIN);
    #endif
  #endif
@@ -310,7 +220,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Z3_MAX_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Z3_MAX_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Z3_MAX_PIN), "Z3_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Z3_MAX_PIN), "Z3_MAX_PIN is not interrupt-capable");
      pciSetup(Z3_MAX_PIN);
    #endif
  #endif
@@ -318,7 +228,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Z3_MIN_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Z3_MIN_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Z3_MIN_PIN), "Z3_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Z3_MIN_PIN), "Z3_MIN_PIN is not interrupt-capable");
      pciSetup(Z3_MIN_PIN);
    #endif
  #endif
@@ -326,7 +236,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Z4_MAX_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Z4_MAX_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Z4_MAX_PIN), "Z4_MAX_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Z4_MAX_PIN), "Z4_MAX_PIN is not interrupt-capable");
      pciSetup(Z4_MAX_PIN);
    #endif
  #endif
@@ -334,7 +244,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Z4_MIN_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Z4_MIN_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Z4_MIN_PIN), "Z4_MIN_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Z4_MIN_PIN), "Z4_MIN_PIN is not interrupt-capable");
      pciSetup(Z4_MIN_PIN);
    #endif
  #endif
@@ -342,7 +252,7 @@ void setup_endstop_interrupts() {
    #if (digitalPinToInterrupt(Z_MIN_PROBE_PIN) != NOT_AN_INTERRUPT)
      _ATTACH(Z_MIN_PROBE_PIN);
    #else
-      static_assert(digitalPinHasPCICR(Z_MIN_PROBE_PIN), "Z_MIN_PROBE_PIN is not interrupt-capable. Disable ENDSTOP_INTERRUPTS_FEATURE to continue.");
+      static_assert(digitalPinHasPCICR(Z_MIN_PROBE_PIN), "Z_MIN_PROBE_PIN is not interrupt-capable");
      pciSetup(Z_MIN_PROBE_PIN);
    #endif
  #endif
--- a/Marlin/src/HAL/HAL_AVR/fast_pwm.cpp
+++ b/Marlin/src/HAL/HAL_AVR/fast_pwm.cpp
@@ -0,0 +1,282 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#ifdef __AVR__
+
+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(FAST_PWM_FAN) || SPINDLE_LASER_PWM
+
+#include "HAL.h"
+
+struct Timer {
+  volatile uint8_t* TCCRnQ[3];  // max 3 TCCR registers per timer
+  volatile uint16_t* OCRnQ[3];  // max 3 OCR registers per timer
+  volatile uint16_t* ICRn;      // max 1 ICR register per timer
+  uint8_t n;                    // the timer number [0->5]
+  uint8_t q;                    // the timer output [0->2] (A->C)
+};
+
+/**
+ * get_pwm_timer
+ *  Get the timer information and register of the provided pin.
+ *  Return a Timer struct containing this information.
+ *  Used by set_pwm_frequency, set_pwm_duty
+ */
+Timer get_pwm_timer(const pin_t pin) {
+  uint8_t q = 0;
+  switch (digitalPinToTimer(pin)) {
+    // Protect reserved timers (TIMER0 & TIMER1)
+    #ifdef TCCR0A
+      #if !AVR_AT90USB1286_FAMILY
+        case TIMER0A:
+      #endif
+      case TIMER0B:
+    #endif
+    #ifdef TCCR1A
+      case TIMER1A: case TIMER1B:
+    #endif
+                                        break;
+    #if defined(TCCR2) || defined(TCCR2A)
+      #ifdef TCCR2
+        case TIMER2: {
+          Timer timer = {
+            /*TCCRnQ*/  { &TCCR2, nullptr, nullptr },
+            /*OCRnQ*/   { (uint16_t*)&OCR2, nullptr, nullptr },
+            /*ICRn*/      nullptr,
+            /*n, q*/      2, 0
+          };
+        }
+      #elif defined(TCCR2A)
+        #if ENABLED(USE_OCR2A_AS_TOP)
+          case TIMER2A:   break; // protect TIMER2A
+          case TIMER2B: {
+            Timer timer = {
+              /*TCCRnQ*/  { &TCCR2A,  &TCCR2B,  nullptr },
+              /*OCRnQ*/   { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, nullptr },
+              /*ICRn*/      nullptr,
+              /*n, q*/      2, 1
+            };
+            return timer;
+          }
+        #else
+          case TIMER2B:   ++q;
+          case TIMER2A: {
+            Timer timer = {
+              /*TCCRnQ*/  { &TCCR2A,  &TCCR2B,  nullptr },
+              /*OCRnQ*/   { (uint16_t*)&OCR2A, (uint16_t*)&OCR2B, nullptr },
+              /*ICRn*/      nullptr,
+                            2, q
+            };
+            return timer;
+          }
+        #endif
+      #endif
+    #endif
+    #ifdef OCR3C
+      case TIMER3C:   ++q;
+      case TIMER3B:   ++q;
+      case TIMER3A: {
+        Timer timer = {
+          /*TCCRnQ*/  { &TCCR3A,  &TCCR3B,  &TCCR3C },
+          /*OCRnQ*/   { &OCR3A,   &OCR3B,   &OCR3C },
+          /*ICRn*/      &ICR3,
+          /*n, q*/      3, q
+        };
+        return timer;
+      }
+    #elif defined(OCR3B)
+      case TIMER3B:   ++q;
+      case TIMER3A: {
+        Timer timer = {
+          /*TCCRnQ*/  { &TCCR3A,  &TCCR3B,  nullptr },
+          /*OCRnQ*/   { &OCR3A,   &OCR3B,  nullptr },
+          /*ICRn*/      &ICR3,
+          /*n, q*/      3, q
+        };
+        return timer;
+      }
+    #endif
+    #ifdef TCCR4A
+      case TIMER4C:   ++q;
+      case TIMER4B:   ++q;
+      case TIMER4A: {
+        Timer timer = {
+          /*TCCRnQ*/  { &TCCR4A,  &TCCR4B,  &TCCR4C },
+          /*OCRnQ*/   { &OCR4A,   &OCR4B,   &OCR4C },
+          /*ICRn*/      &ICR4,
+          /*n, q*/      4, q
+        };
+        return timer;
+      }
+    #endif
+    #ifdef TCCR5A
+      case TIMER5C:   ++q;
+      case TIMER5B:   ++q;
+      case TIMER5A: {
+        Timer timer = {
+          /*TCCRnQ*/  { &TCCR5A,  &TCCR5B,  &TCCR5C },
+          /*OCRnQ*/   { &OCR5A,   &OCR5B,   &OCR5C },
+          /*ICRn*/      &ICR5,
+          /*n, q*/      5, q
+        };
+        return timer;
+      }
+    #endif
+  }
+  Timer timer = {
+      /*TCCRnQ*/  { nullptr, nullptr, nullptr },
+      /*OCRnQ*/   { nullptr, nullptr, nullptr },
+      /*ICRn*/      nullptr,
+                    0, 0
+  };
+  return timer;
+}
+
+void set_pwm_frequency(const pin_t pin, int f_desired) {
+  Timer timer = get_pwm_timer(pin);
+  if (timer.n == 0) return; // Don't proceed if protected timer or not recognised
+  uint16_t size;
+  if (timer.n == 2) size = 255; else size = 65535;
+
+  uint16_t res = 255;   // resolution (TOP value)
+  uint8_t j = 0;        // prescaler index
+  uint8_t wgm = 1;      // waveform generation mode
+
+  // Calculating the prescaler and resolution to use to achieve closest frequency
+  if (f_desired != 0) {
+    int f = (F_CPU) / (2 * 1024 * size) + 1; // Initialize frequency as lowest (non-zero) achievable
+    uint16_t prescaler[] = { 0, 1, 8, /*TIMER2 ONLY*/32, 64, /*TIMER2 ONLY*/128, 256, 1024 };
+
+    // loop over prescaler values
+    for (uint8_t i = 1; i < 8; i++) {
+      uint16_t res_temp_fast = 255, res_temp_phase_correct = 255;
+      if (timer.n == 2) {
+        // No resolution calculation for TIMER2 unless enabled USE_OCR2A_AS_TOP
+        #if ENABLED(USE_OCR2A_AS_TOP)
+          const uint16_t rtf = (F_CPU) / (prescaler[i] * f_desired);
+          res_temp_fast = rtf - 1;
+          res_temp_phase_correct = rtf / 2;
+        #endif
+      }
+      else {
+        // Skip TIMER2 specific prescalers when not TIMER2
+        if (i == 3 || i == 5) continue;
+        const uint16_t rtf = (F_CPU) / (prescaler[i] * f_desired);
+        res_temp_fast = rtf - 1;
+        res_temp_phase_correct = rtf / 2;
+      }
+
+      LIMIT(res_temp_fast, 1u, size);
+      LIMIT(res_temp_phase_correct, 1u, size);
+      // Calculate frequencies of test prescaler and resolution values
+      const int f_temp_fast = (F_CPU) / (prescaler[i] * (1 + res_temp_fast)),
+                f_temp_phase_correct = (F_CPU) / (2 * prescaler[i] * res_temp_phase_correct),
+                f_diff = ABS(f - f_desired),
+                f_fast_diff = ABS(f_temp_fast - f_desired),
+                f_phase_diff = ABS(f_temp_phase_correct - f_desired);
+
+      // If FAST values are closest to desired f
+      if (f_fast_diff < f_diff && f_fast_diff <= f_phase_diff) {
+        // Remember this combination
+        f = f_temp_fast;
+        res = res_temp_fast;
+        j = i;
+        // Set the Wave Generation Mode to FAST PWM
+        if (timer.n == 2) {
+          wgm = (
+            #if ENABLED(USE_OCR2A_AS_TOP)
+              WGM2_FAST_PWM_OCR2A
+            #else
+              WGM2_FAST_PWM
+            #endif
+          );
+        }
+        else wgm = WGM_FAST_PWM_ICRn;
+      }
+      // If PHASE CORRECT values are closes to desired f
+      else if (f_phase_diff < f_diff) {
+        f = f_temp_phase_correct;
+        res = res_temp_phase_correct;
+        j = i;
+        // Set the Wave Generation Mode to PWM PHASE CORRECT
+        if (timer.n == 2) {
+          wgm = (
+            #if ENABLED(USE_OCR2A_AS_TOP)
+              WGM2_PWM_PC_OCR2A
+            #else
+              WGM2_PWM_PC
+            #endif
+          );
+        }
+        else wgm = WGM_PWM_PC_ICRn;
+      }
+    }
+  }
+  _SET_WGMnQ(timer.TCCRnQ, wgm);
+  _SET_CSn(timer.TCCRnQ, j);
+
+  if (timer.n == 2) {
+    #if ENABLED(USE_OCR2A_AS_TOP)
+      _SET_OCRnQ(timer.OCRnQ, 0, res);  // Set OCR2A value (TOP) = res
+    #endif
+  }
+  else
+    _SET_ICRn(timer.ICRn, res);         // Set ICRn value (TOP) = res
+}
+
+void set_pwm_duty(const pin_t pin, const uint16_t v, const uint16_t v_size/*=255*/, const bool invert/*=false*/) {
+  // If v is 0 or v_size (max), digitalWrite to LOW or HIGH.
+  // Note that digitalWrite also disables pwm output for us (sets COM bit to 0)
+  if (v == 0)
+    digitalWrite(pin, invert);
+  else if (v == v_size)
+    digitalWrite(pin, !invert);
+  else {
+    Timer timer = get_pwm_timer(pin);
+    if (timer.n == 0) return; // Don't proceed if protected timer or not recognised
+    // Set compare output mode to CLEAR -> SET or SET -> CLEAR (if inverted)
+    _SET_COMnQ(timer.TCCRnQ, (timer.q
+        #ifdef TCCR2
+          + (timer.q == 2) // COM20 is on bit 4 of TCCR2, thus requires q + 1 in the macro
+        #endif
+      ), COM_CLEAR_SET + invert
+    );
+
+    uint16_t top;
+    if (timer.n == 2) { // if TIMER2
+      top = (
+        #if ENABLED(USE_OCR2A_AS_TOP)
+          *timer.OCRnQ[0] // top = OCR2A
+        #else
+          255 // top = 0xFF (max)
+        #endif
+      );
+    }
+    else
+      top = *timer.ICRn; // top = ICRn
+
+    _SET_OCRnQ(timer.OCRnQ, timer.q, v * float(top / v_size)); // Scale 8/16-bit v to top value
+  }
+}
+
+#endif // FAST_PWM_FAN || SPINDLE_LASER_PWM
+#endif // __AVR__
--- a/Marlin/src/HAL/HAL_AVR/fastio.cpp
+++ b/Marlin/src/HAL/HAL_AVR/fastio.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -234,55 +234,5 @@ uint8_t extDigitalRead(const int8_t pin) {
  }
 }

-#if 0
-/**
- * Set Timer 5 PWM frequency in Hz, from 3.8Hz up to ~16MHz
- * with a minimum resolution of 100 steps.
- *
- * DC values -1.0 to 1.0. Negative duty cycle inverts the pulse.
- */
-uint16_t set_pwm_frequency_hz(const_float_t hz, const float dca, const float dcb, const float dcc) {
-  float count = 0;
-  if (hz > 0 && (dca || dcb || dcc)) {
-    count = float(F_CPU) / hz;            // 1x prescaler, TOP for 16MHz base freq.
-    uint16_t prescaler;                   // Range of 30.5Hz (65535) 64.5kHz (>31)
-
-         if (count >= 255. * 256.) { prescaler = 1024; SET_CS(5, PRESCALER_1024); }
-    else if (count >= 255. * 64.)  { prescaler = 256;  SET_CS(5,  PRESCALER_256); }
-    else if (count >= 255. * 8.)   { prescaler = 64;   SET_CS(5,   PRESCALER_64); }
-    else if (count >= 255.)        { prescaler = 8;    SET_CS(5,    PRESCALER_8); }
-    else                           { prescaler = 1;    SET_CS(5,    PRESCALER_1); }
-
-    count /= float(prescaler);
-    const float pwm_top = round(count);   // Get the rounded count
-
-    ICR5 = (uint16_t)pwm_top - 1;         // Subtract 1 for TOP
-    OCR5A = pwm_top * ABS(dca);           // Update and scale DCs
-    OCR5B = pwm_top * ABS(dcb);
-    OCR5C = pwm_top * ABS(dcc);
-    _SET_COM(5, A, dca ? (dca < 0 ? COM_SET_CLEAR : COM_CLEAR_SET) : COM_NORMAL); // Set compare modes
-    _SET_COM(5, B, dcb ? (dcb < 0 ? COM_SET_CLEAR : COM_CLEAR_SET) : COM_NORMAL);
-    _SET_COM(5, C, dcc ? (dcc < 0 ? COM_SET_CLEAR : COM_CLEAR_SET) : COM_NORMAL);
-
-    SET_WGM(5, FAST_PWM_ICRn);            // Fast PWM with ICR5 as TOP
-
-    //SERIAL_ECHOLNPGM("Timer 5 Settings:");
-    //SERIAL_ECHOLNPGM("  Prescaler=", prescaler);
-    //SERIAL_ECHOLNPGM("        TOP=", ICR5);
-    //SERIAL_ECHOLNPGM("      OCR5A=", OCR5A);
-    //SERIAL_ECHOLNPGM("      OCR5B=", OCR5B);
-    //SERIAL_ECHOLNPGM("      OCR5C=", OCR5C);
-  }
-  else {
-    // Restore the default for Timer 5
-    SET_WGM(5, PWM_PC_8);                 // PWM 8-bit (Phase Correct)
-    SET_COMS(5, NORMAL, NORMAL, NORMAL);  // Do nothing
-    SET_CS(5, PRESCALER_64);              // 16MHz / 64 = 250kHz
-    OCR5A = OCR5B = OCR5C = 0;
-  }
-  return round(count);
-}
-#endif
-
 #endif // FASTIO_EXT_START
 #endif // __AVR__
--- a/Marlin/src/HAL/HAL_AVR/fastio.h
+++ b/Marlin/src/HAL/HAL_AVR/fastio.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -29,17 +29,11 @@

 #include <avr/io.h>

-#if defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1286P__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB646P__) || defined(__AVR_AT90USB647__)
-  #define AVR_AT90USB1286_FAMILY 1
-#elif defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644PA__) || defined(__AVR_ATmega1284P__)
-  #define AVR_ATmega1284_FAMILY 1
-#elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
-  #define AVR_ATmega2560_FAMILY 1
-#elif defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
-  #define AVR_ATmega2561_FAMILY 1
-#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328__) || defined(__AVR_ATmega328P__)
-  #define AVR_ATmega328_FAMILY 1
-#endif
+#define AVR_AT90USB1286_FAMILY (defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1286P__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB646P__) || defined(__AVR_AT90USB647__))
+#define AVR_ATmega1284_FAMILY (defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644PA__) || defined(__AVR_ATmega1284P__))
+#define AVR_ATmega2560_FAMILY (defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__))
+#define AVR_ATmega2561_FAMILY (defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__))
+#define AVR_ATmega328_FAMILY (defined(__AVR_ATmega168__) || defined(__AVR_ATmega328__) || defined(__AVR_ATmega328P__))

 /**
 * Include Ports and Functions
@@ -63,7 +57,7 @@
 *
 * Now you can simply SET_OUTPUT(PIN); WRITE(PIN, HIGH); WRITE(PIN, LOW);
 *
- * Why double up on these macros? see https://gcc.gnu.org/onlinedocs/cpp/Stringification.html
+ * Why double up on these macros? see http://gcc.gnu.org/onlinedocs/cpp/Stringification.html
 */

 #define _READ(IO)             TEST(DIO ## IO ## _RPORT, DIO ## IO ## _PIN)
@@ -104,9 +98,9 @@

 #define SET_INPUT(IO)         _SET_INPUT(IO)
 #define SET_INPUT_PULLUP(IO)  do{ _SET_INPUT(IO); _WRITE(IO, HIGH); }while(0)
-#define SET_INPUT_PULLDOWN    SET_INPUT
 #define SET_OUTPUT(IO)        _SET_OUTPUT(IO)
-#define SET_PWM               SET_OUTPUT
+
+#define SET_PWM(IO)           SET_OUTPUT(IO)

 #define IS_INPUT(IO)          _IS_INPUT(IO)
 #define IS_OUTPUT(IO)         _IS_OUTPUT(IO)
@@ -118,7 +112,7 @@
 */

 // Waveform Generation Modes
-enum WaveGenMode : uint8_t {
+enum WaveGenMode : char {
  WGM_NORMAL,          //  0
  WGM_PWM_PC_8,        //  1
  WGM_PWM_PC_9,        //  2
@@ -138,19 +132,19 @@ enum WaveGenMode : uint8_t {
 };

 // Wavefore Generation Modes (Timer 2 only)
-enum WaveGenMode2 : uint8_t {
-  WGM2_NORMAL,         // 0
-  WGM2_PWM_PC,         // 1
-  WGM2_CTC_OCR2A,      // 2
-  WGM2_FAST_PWM,       // 3
-  WGM2_reserved_1,     // 4
-  WGM2_PWM_PC_OCR2A,   // 5
-  WGM2_reserved_2,     // 6
-  WGM2_FAST_PWM_OCR2A, // 7
+enum WaveGenMode2 : char {
+  WGM2_NORMAL,          // 0
+  WGM2_PWM_PC,          // 1
+  WGM2_CTC_OCR2A,       // 2
+  WGM2_FAST_PWM,        // 3
+  WGM2_reserved_1,      // 4
+  WGM2_PWM_PC_OCR2A,    // 5
+  WGM2_reserved_2,      // 6
+  WGM2_FAST_PWM_OCR2A,  // 7
 };

 // Compare Modes
-enum CompareMode : uint8_t {
+enum CompareMode : char {
  COM_NORMAL,          //  0
  COM_TOGGLE,          //  1  Non-PWM: OCnx ... Both PWM (WGM 9,11,14,15): OCnA only ... else NORMAL
  COM_CLEAR_SET,       //  2  Non-PWM: OCnx ... Fast PWM: OCnx/Bottom ... PF-FC: OCnx Up/Down
@@ -158,7 +152,7 @@ enum CompareMode : uint8_t {
 };

 // Clock Sources
-enum ClockSource : uint8_t {
+enum ClockSource : char {
  CS_NONE,             //  0
  CS_PRESCALER_1,      //  1
  CS_PRESCALER_8,      //  2
@@ -170,7 +164,7 @@ enum ClockSource : uint8_t {
 };

 // Clock Sources (Timer 2 only)
-enum ClockSource2 : uint8_t {
+enum ClockSource2 : char {
  CS2_NONE,            //  0
  CS2_PRESCALER_1,     //  1
  CS2_PRESCALER_8,     //  2
@@ -203,33 +197,40 @@ enum ClockSource2 : uint8_t {
    TCCR##T##B = (TCCR##T##B & ~(0x3 << WGM##T##2)) | (((int(V) >> 2) & 0x3) << WGM##T##2); \
  }while(0)
 #define SET_WGM(T,V) _SET_WGM(T,WGM_##V)
+// Runtime (see set_pwm_frequency):
+#define _SET_WGMnQ(TCCRnQ, V) do{ \
+    *(TCCRnQ)[0] = (*(TCCRnQ)[0] & ~(0x3 << 0)) | (( int(V)       & 0x3) << 0); \
+    *(TCCRnQ)[1] = (*(TCCRnQ)[1] & ~(0x3 << 3)) | (((int(V) >> 2) & 0x3) << 3); \
+  }while(0)

 // Set Clock Select bits
 // Ex: SET_CS3(PRESCALER_64);
-#ifdef TCCR2
-  #define HAS_TCCR2 1
-#endif
 #define _SET_CS(T,V) (TCCR##T##B = (TCCR##T##B & ~(0x7 << CS##T##0)) | ((int(V) & 0x7) << CS##T##0))
 #define _SET_CS0(V) _SET_CS(0,V)
 #define _SET_CS1(V) _SET_CS(1,V)
+#ifdef TCCR2
+  #define _SET_CS2(V) (TCCR2 = (TCCR2 & ~(0x7 << CS20)) | (int(V) << CS20))
+#else
+  #define _SET_CS2(V) _SET_CS(2,V)
+#endif
 #define _SET_CS3(V) _SET_CS(3,V)
 #define _SET_CS4(V) _SET_CS(4,V)
 #define _SET_CS5(V) _SET_CS(5,V)
 #define SET_CS0(V) _SET_CS0(CS_##V)
 #define SET_CS1(V) _SET_CS1(CS_##V)
-
-#if HAS_TCCR2
-  #define _SET_CS2(V) (TCCR2 = (TCCR2 & ~(0x7 << CS20)) | (int(V) << CS20))
+#ifdef TCCR2
  #define SET_CS2(V) _SET_CS2(CS2_##V)
 #else
-  #define _SET_CS2(V) _SET_CS(2,V)
  #define SET_CS2(V) _SET_CS2(CS_##V)
 #endif
-
 #define SET_CS3(V) _SET_CS3(CS_##V)
 #define SET_CS4(V) _SET_CS4(CS_##V)
 #define SET_CS5(V) _SET_CS5(CS_##V)
 #define SET_CS(T,V) SET_CS##T(V)
+// Runtime (see set_pwm_frequency)
+#define _SET_CSn(TCCRnQ, V) do{ \
+    (*(TCCRnQ)[1] = (*(TCCRnQ[1]) & ~(0x7 << 0)) | ((int(V) & 0x7) << 0)); \
+  }while(0)

 // Set Compare Mode bits
 // Ex: SET_COMS(4,CLEAR_SET,CLEAR_SET,CLEAR_SET);
@@ -239,6 +240,22 @@ enum ClockSource2 : uint8_t {
 #define SET_COMB(T,V) SET_COM(T,B,V)
 #define SET_COMC(T,V) SET_COM(T,C,V)
 #define SET_COMS(T,V1,V2,V3) do{ SET_COMA(T,V1); SET_COMB(T,V2); SET_COMC(T,V3); }while(0)
+// Runtime (see set_pwm_duty)
+#define _SET_COMnQ(TCCRnQ, Q, V) do{ \
+    (*(TCCRnQ)[0] = (*(TCCRnQ)[0] & ~(0x3 << (6-2*(Q)))) | (int(V) << (6-2*(Q)))); \
+  }while(0)
+
+// Set OCRnQ register
+// Runtime (see set_pwm_duty):
+#define _SET_OCRnQ(OCRnQ, Q, V) do{ \
+    (*(OCRnQ)[(Q)] = (0x0000) | (int(V) & 0xFFFF)); \
+  }while(0)
+
+// Set ICRn register (one per timer)
+// Runtime (see set_pwm_frequency)
+#define _SET_ICRn(ICRn, V) do{ \
+    (*(ICRn) = (0x0000) | (int(V) & 0xFFFF)); \
+  }while(0)

 // Set Noise Canceler bit
 // Ex: SET_ICNC(2,1)
@@ -261,8 +278,8 @@ enum ClockSource2 : uint8_t {
 * PWM availability macros
 */

-// Determine which hardware PWMs are already in use
-#define _PWM_CHK_FAN_B(P) (P == E0_AUTO_FAN_PIN || P == E1_AUTO_FAN_PIN || P == E2_AUTO_FAN_PIN || P == E3_AUTO_FAN_PIN || P == E4_AUTO_FAN_PIN || P == E5_AUTO_FAN_PIN || P == E6_AUTO_FAN_PIN || P == E7_AUTO_FAN_PIN || P == CHAMBER_AUTO_FAN_PIN || P == COOLER_AUTO_FAN_PIN)
+// Determine which harware PWMs are already in use
+#define _PWM_CHK_FAN_B(P) (P == E0_AUTO_FAN_PIN || P == E1_AUTO_FAN_PIN || P == E2_AUTO_FAN_PIN || P == E3_AUTO_FAN_PIN || P == E4_AUTO_FAN_PIN || P == E5_AUTO_FAN_PIN || P == E6_AUTO_FAN_PIN || P == E7_AUTO_FAN_PIN || P == CHAMBER_AUTO_FAN_PIN)
 #if PIN_EXISTS(CONTROLLER_FAN)
  #define PWM_CHK_FAN_B(P) (_PWM_CHK_FAN_B(P) || P == CONTROLLER_FAN_PIN)
 #else
--- a/Marlin/src/HAL/HAL_AVR/fastio/fastio_1280.h
+++ b/Marlin/src/HAL/HAL_AVR/fastio/fastio_1280.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -26,7 +26,7 @@
 *
 *   Hardware Pin  : 02 03 06 07 01 05 15 16 17 18 23 24 25 26 64 63 13 12 46 45 44 43 78 77 76 75 74 73 72 71 60 59 58 57 56 55 54 53 50 70 52 51 42 41 40 39 38 37 36 35 22 21 20 19 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 | 04 08 09 10 11 14 27 28 29 30 31 32 33 34 47 48 49 61 62 65 66 67 68 69 79 80 81 98 99 100
 *   Port          : E0 E1 E4 E5 G5 E3 H3 H4 H5 H6 B4 B5 B6 B7 J1 J0 H1 H0 D3 D2 D1 D0 A0 A1 A2 A3 A4 A5 A6 A7 C7 C6 C5 C4 C3 C2 C1 C0 D7 G2 G1 G0 L7 L6 L5 L4 L3 L2 L1 L0 B3 B2 B1 B0 F0 F1 F2 F3 F4 F5 F6 F7 K0 K1 K2 K3 K4 K5 K6 K7 | E2 E6 E7 xx xx H2 H7 G3 G4 xx xx xx xx xx D4 D5 D6 xx xx J2 J3 J4 J5 J6 J7 xx xx xx xx xx
- *   Logical Pin   : 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | 78 79 80 xx xx 84 85 71 70 xx xx xx xx xx 81 82 83 xx xx 72 73 75 76 77 74 xx xx xx xx xx
+ *   Logical Pin   : 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | 78 79 80 xx xx 84 85 71 70 xx xx xx xx xx 81 82 83 xx xx 72 72 75 76 77 74 xx xx xx xx xx
 */

 #include "../fastio.h"
--- a/Marlin/src/HAL/HAL_AVR/fastio/fastio_1281.h
+++ b/Marlin/src/HAL/HAL_AVR/fastio/fastio_1281.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_AVR/fastio/fastio_168.h
+++ b/Marlin/src/HAL/HAL_AVR/fastio/fastio_168.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_AVR/fastio/fastio_644.h
+++ b/Marlin/src/HAL/HAL_AVR/fastio/fastio_644.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_AVR/fastio/fastio_AT90USB.h
+++ b/Marlin/src/HAL/HAL_AVR/fastio/fastio_AT90USB.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/NATIVE_SIM/inc/Conditionals_LCD.h
+++ b/Marlin/src/HAL/NATIVE_SIM/inc/Conditionals_LCD.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_AVR/inc/Conditionals_adv.h
+++ b/Marlin/src/HAL/HAL_AVR/inc/Conditionals_adv.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_AVR/inc/Conditionals_post.h
+++ b/Marlin/src/HAL/HAL_AVR/inc/Conditionals_post.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_AVR/inc/SanityCheck.h
+++ b/Marlin/src/HAL/HAL_AVR/inc/SanityCheck.h
@@ -0,0 +1,65 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * Test AVR-specific configuration values for errors at compile-time.
+ */
+
+/**
+ * Digipot requirement
+ */
+ #if ENABLED(DIGIPOT_MCP4018)
+  #if !defined(DIGIPOTS_I2C_SDA_X) || !defined(DIGIPOTS_I2C_SDA_Y) || !defined(DIGIPOTS_I2C_SDA_Z) \
+    || !defined(DIGIPOTS_I2C_SDA_E0) || !defined(DIGIPOTS_I2C_SDA_E1)
+      #error "DIGIPOT_MCP4018 requires DIGIPOTS_I2C_SDA_* pins to be defined."
+  #endif
+#endif
+
+/**
+ * Checks for FAST PWM
+ */
+#if ENABLED(FAST_PWM_FAN) && (ENABLED(USE_OCR2A_AS_TOP) && defined(TCCR2))
+  #error "USE_OCR2A_AS_TOP does not apply to devices with a single output TIMER2"
+#endif
+
+/**
+ * Sanity checks for Spindle / Laser PWM
+ */
+#if ENABLED(SPINDLE_LASER_PWM)
+  #if SPINDLE_LASER_PWM_PIN == 4 || WITHIN(SPINDLE_LASER_PWM_PIN, 11, 13)
+    #error "Counter/Timer for SPINDLE_LASER_PWM_PIN is used by a system interrupt."
+  #elif NUM_SERVOS > 0 && (WITHIN(SPINDLE_LASER_PWM_PIN, 2, 3) || SPINDLE_LASER_PWM_PIN == 5)
+    #error "Counter/Timer for SPINDLE_LASER_PWM_PIN is used by the servo system."
+  #endif
+#endif
+
+/**
+ * The Trinamic library includes SoftwareSerial.h, leading to a compile error.
+ */
+#if HAS_TRINAMIC && ENABLED(ENDSTOP_INTERRUPTS_FEATURE)
+  #error "TMCStepper includes SoftwareSerial.h which is incompatible with ENDSTOP_INTERRUPTS_FEATURE. Disable ENDSTOP_INTERRUPTS_FEATURE to continue."
+#endif
+
+#if TMC_HAS_SW_SERIAL && ENABLED(MONITOR_DRIVER_STATUS)
+  #error "MONITOR_DRIVER_STATUS causes performance issues when used with SoftwareSerial-connected drivers. Disable MONITOR_DRIVER_STATUS or use hardware serial to continue."
+#endif
--- a/Marlin/src/HAL/HAL_AVR/math.h
+++ b/Marlin/src/HAL/HAL_AVR/math.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -35,7 +35,7 @@
 // C B A is longIn1
 // D C B A is longIn2
 //
-FORCE_INLINE static uint16_t MultiU24X32toH16(uint32_t longIn1, uint32_t longIn2) {
+static FORCE_INLINE uint16_t MultiU24X32toH16(uint32_t longIn1, uint32_t longIn2) {
  uint8_t tmp1;
  uint8_t tmp2;
  uint16_t intRes;
@@ -89,7 +89,7 @@ FORCE_INLINE static uint16_t MultiU24X32toH16(uint32_t longIn1, uint32_t longIn2
 // uses:
 // r26 to store 0
 // r27 to store the byte 1 of the 24 bit result
-FORCE_INLINE static uint16_t MultiU16X8toH16(uint8_t charIn1, uint16_t intIn2) {
+static FORCE_INLINE uint16_t MultiU16X8toH16(uint8_t charIn1, uint16_t intIn2) {
  uint8_t tmp;
  uint16_t intRes;
  __asm__ __volatile__ (
--- a/Marlin/src/HAL/HAL_AVR/persistent_store_eeprom.cpp
+++ b/Marlin/src/HAL/HAL_AVR/persistent_store_eeprom.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #ifdef __AVR__
@@ -25,41 +25,32 @@

 #if EITHER(EEPROM_SETTINGS, SD_FIRMWARE_UPDATE)

-/**
- * PersistentStore for Arduino-style EEPROM interface
- * with implementations supplied by the framework.
- */
+#include "../shared/persistent_store_api.h"

-#include "../shared/eeprom_api.h"
-
-#ifndef MARLIN_EEPROM_SIZE
-  #define MARLIN_EEPROM_SIZE size_t(E2END + 1)
-#endif
-size_t PersistentStore::capacity()    { return MARLIN_EEPROM_SIZE; }
-bool PersistentStore::access_start()  { return true; }
+bool PersistentStore::access_start() { return true; }
 bool PersistentStore::access_finish() { return true; }

 bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
-  uint16_t written = 0;
  while (size--) {
    uint8_t * const p = (uint8_t * const)pos;
    uint8_t v = *value;
-    if (v != eeprom_read_byte(p)) { // EEPROM has only ~100,000 write cycles, so only write bytes that have changed!
+    // EEPROM has only ~100,000 write cycles,
+    // so only write bytes that have changed!
+    if (v != eeprom_read_byte(p)) {
      eeprom_write_byte(p, v);
-      if (++written & 0x7F) delay(2); else safe_delay(2); // Avoid triggering watchdog during long EEPROM writes
      if (eeprom_read_byte(p) != v) {
-        SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
+        SERIAL_ECHO_MSG(MSG_ERR_EEPROM_WRITE);
        return true;
      }
    }
    crc16(crc, &v, 1);
    pos++;
    value++;
-  }
+  };
  return false;
 }

-bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
  do {
    uint8_t c = eeprom_read_byte((uint8_t*)pos);
    if (writing) *value = c;
@@ -70,5 +61,7 @@ bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t
  return false;  // always assume success for AVR's
 }

+size_t PersistentStore::capacity() { return E2END + 1; }
+
 #endif // EEPROM_SETTINGS || SD_FIRMWARE_UPDATE
 #endif // __AVR__
--- a/Marlin/src/HAL/HAL_AVR/pinsDebug.h
+++ b/Marlin/src/HAL/HAL_AVR/pinsDebug.h
@@ -1,9 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
@@ -16,7 +13,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -29,9 +26,7 @@

 #define NUMBER_PINS_TOTAL NUM_DIGITAL_PINS

-#if MB(BQ_ZUM_MEGA_3D, MIGHTYBOARD_REVE, MINIRAMBO, SCOOVO_X9H, TRIGORILLA_14)
-  #define AVR_ATmega2560_FAMILY_PLUS_70 1
-#endif
+#define AVR_ATmega2560_FAMILY_PLUS_70 MB(BQ_ZUM_MEGA_3D, MIGHTYBOARD_REVE, MINIRAMBO, SCOOVO_X9H)

 #if AVR_AT90USB1286_FAMILY

@@ -41,7 +36,7 @@
  // portModeRegister takes a different argument
  #define digitalPinToTimer_DEBUG(p) digitalPinToTimer(p)
  #define digitalPinToBitMask_DEBUG(p) digitalPinToBitMask(p)
-  #define digitalPinToPort_DEBUG(p) digitalPinToPort(p)
+  #define digitalPinToPort_DEBUG(p) digitalPinToPort_Teensy(p)
  #define GET_PINMODE(pin) (*portModeRegister(pin) & digitalPinToBitMask_DEBUG(pin))

 #elif AVR_ATmega2560_FAMILY_PLUS_70   // So we can access/display all the pins on boards using more than 70
@@ -74,13 +69,13 @@
 #define MULTI_NAME_PAD 26 // space needed to be pretty if not first name assigned to a pin

 void PRINT_ARRAY_NAME(uint8_t x) {
-  PGM_P const name_mem_pointer = (PGM_P)pgm_read_ptr(&pin_array[x].name);
-  LOOP_L_N(y, MAX_NAME_LENGTH) {
+  char *name_mem_pointer = (char*)pgm_read_ptr(&pin_array[x].name);
+  for (uint8_t y = 0; y < MAX_NAME_LENGTH; y++) {
    char temp_char = pgm_read_byte(name_mem_pointer + y);
    if (temp_char != 0)
      SERIAL_CHAR(temp_char);
    else {
-      LOOP_L_N(i, MAX_NAME_LENGTH - y) SERIAL_CHAR(' ');
+      for (uint8_t i = 0; i < MAX_NAME_LENGTH - y; i++) SERIAL_CHAR(' ');
      break;
    }
  }
@@ -102,7 +97,7 @@ void PRINT_ARRAY_NAME(uint8_t x) {
      return true;                                              \
    } else return false

-#define ABTEST(N) defined(TCCR##N##A) && defined(COM##N##A1)
+

 /**
 * Print a pin's PWM status.
@@ -113,7 +108,7 @@ static bool pwm_status(uint8_t pin) {

  switch (digitalPinToTimer_DEBUG(pin)) {

-    #if ABTEST(0)
+    #if defined(TCCR0A) && defined(COM0A1)
      #ifdef TIMER0A
        #if !AVR_AT90USB1286_FAMILY  // not available in Teensyduino type IDEs
          PWM_CASE(0, A);
@@ -122,20 +117,20 @@ static bool pwm_status(uint8_t pin) {
      PWM_CASE(0, B);
    #endif

-    #if ABTEST(1)
+    #if defined(TCCR1A) && defined(COM1A1)
      PWM_CASE(1, A);
      PWM_CASE(1, B);
-      #if defined(COM1C1) && defined(TIMER1C)
-        PWM_CASE(1, C);
-      #endif
+     #if defined(COM1C1) && defined(TIMER1C)
+      PWM_CASE(1, C);
+     #endif
    #endif

-    #if ABTEST(2)
+    #if defined(TCCR2A) && defined(COM2A1)
      PWM_CASE(2, A);
      PWM_CASE(2, B);
    #endif

-    #if ABTEST(3)
+    #if defined(TCCR3A) && defined(COM3A1)
      PWM_CASE(3, A);
      PWM_CASE(3, B);
      #ifdef COM3C1
@@ -149,7 +144,7 @@ static bool pwm_status(uint8_t pin) {
      PWM_CASE(4, C);
    #endif

-    #if ABTEST(5)
+    #if defined(TCCR5A) && defined(COM5A1)
      PWM_CASE(5, A);
      PWM_CASE(5, B);
      PWM_CASE(5, C);
@@ -166,16 +161,16 @@ static bool pwm_status(uint8_t pin) {
 const volatile uint8_t* const PWM_other[][3] PROGMEM = {
    { &TCCR0A, &TCCR0B, &TIMSK0 },
    { &TCCR1A, &TCCR1B, &TIMSK1 },
-  #if ABTEST(2)
+  #if defined(TCCR2A) && defined(COM2A1)
    { &TCCR2A, &TCCR2B, &TIMSK2 },
  #endif
-  #if ABTEST(3)
+  #if defined(TCCR3A) && defined(COM3A1)
    { &TCCR3A, &TCCR3B, &TIMSK3 },
  #endif
  #ifdef TCCR4A
    { &TCCR4A, &TCCR4B, &TIMSK4 },
  #endif
-  #if ABTEST(5)
+  #if defined(TCCR5A) && defined(COM5A1)
    { &TCCR5A, &TCCR5B, &TIMSK5 },
  #endif
 };
@@ -195,11 +190,11 @@ const volatile uint8_t* const PWM_OCR[][3] PROGMEM = {
   { (const uint8_t*)&OCR1A, (const uint8_t*)&OCR1B, 0 },
  #endif

-  #if ABTEST(2)
+  #if defined(TCCR2A) && defined(COM2A1)
    { &OCR2A, &OCR2B, 0 },
  #endif

-  #if ABTEST(3)
+  #if defined(TCCR3A) && defined(COM3A1)
    #ifdef COM3C1
      { (const uint8_t*)&OCR3A, (const uint8_t*)&OCR3B, (const uint8_t*)&OCR3C },
    #else
@@ -211,7 +206,7 @@ const volatile uint8_t* const PWM_OCR[][3] PROGMEM = {
    { (const uint8_t*)&OCR4A, (const uint8_t*)&OCR4B, (const uint8_t*)&OCR4C },
  #endif

-  #if ABTEST(5)
+  #if defined(TCCR5A) && defined(COM5A1)
    { (const uint8_t*)&OCR5A, (const uint8_t*)&OCR5B, (const uint8_t*)&OCR5C },
  #endif
 };
@@ -238,9 +233,9 @@ static void print_is_also_tied() { SERIAL_ECHOPGM(" is also tied to this pin");

 inline void com_print(const uint8_t N, const uint8_t Z) {
  const uint8_t *TCCRA = (uint8_t*)TCCR_A(N);
-  SERIAL_ECHOPGM("    COM", AS_DIGIT(N));
-  SERIAL_CHAR(Z);
-  SERIAL_ECHOPGM(": ", int((*TCCRA >> (6 - Z * 2)) & 0x03));
+  SERIAL_ECHOPGM("    COM");
+  SERIAL_CHAR('0' + N, Z);
+  SERIAL_ECHOPAIR(": ", int((*TCCRA >> (6 - Z * 2)) & 0x03));
 }

 void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N - WGM bit layout
@@ -250,8 +245,8 @@ void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N -
  uint8_t WGM = (((*TCCRB & _BV(WGM_2)) >> 1) | (*TCCRA & (_BV(WGM_0) | _BV(WGM_1))));
  if (N == 4) WGM |= ((*TCCRB & _BV(WGM_3)) >> 1);

-  SERIAL_ECHOPGM("    TIMER", AS_DIGIT(T));
-  SERIAL_CHAR(L);
+  SERIAL_ECHOPGM("    TIMER");
+  SERIAL_CHAR(T + '0', L);
  SERIAL_ECHO_SP(3);

  if (N == 3) {
@@ -262,14 +257,22 @@ void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N -
    const uint16_t *OCRVAL16 = (uint16_t*)OCR_VAL(T, L - 'A');
    PWM_PRINT(*OCRVAL16);
  }
-  SERIAL_ECHOPGM("    WGM: ", WGM);
+  SERIAL_ECHOPAIR("    WGM: ", WGM);
  com_print(T,L);
-  SERIAL_ECHOPGM("    CS: ", (*TCCRB & (_BV(CS_0) | _BV(CS_1) | _BV(CS_2)) ));
-  SERIAL_ECHOPGM("    TCCR", AS_DIGIT(T), "A: ", *TCCRA);
-  SERIAL_ECHOPGM("    TCCR", AS_DIGIT(T), "B: ", *TCCRB);
+  SERIAL_ECHOPAIR("    CS: ", (*TCCRB & (_BV(CS_0) | _BV(CS_1) | _BV(CS_2)) ));
+
+  SERIAL_ECHOPGM("    TCCR");
+  SERIAL_CHAR(T + '0');
+  SERIAL_ECHOPAIR("A: ", *TCCRA);
+
+  SERIAL_ECHOPGM("    TCCR");
+  SERIAL_CHAR(T + '0');
+  SERIAL_ECHOPAIR("B: ", *TCCRB);

  const uint8_t *TMSK = (uint8_t*)TIMSK(T);
-  SERIAL_ECHOPGM("    TIMSK", AS_DIGIT(T), ": ", *TMSK);
+  SERIAL_ECHOPGM("    TIMSK");
+  SERIAL_CHAR(T + '0');
+  SERIAL_ECHOPAIR(": ", *TMSK);

  const uint8_t OCIE = L - 'A' + 1;
  if (N == 3) { if (WGM == 0 || WGM == 2 || WGM ==  4 || WGM ==  6) err_is_counter(); }
@@ -281,7 +284,7 @@ void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N -
 static void pwm_details(uint8_t pin) {
  switch (digitalPinToTimer_DEBUG(pin)) {

-    #if ABTEST(0)
+    #if defined(TCCR0A) && defined(COM0A1)
      #ifdef TIMER0A
        #if !AVR_AT90USB1286_FAMILY  // not available in Teensyduino type IDEs
          case TIMER0A: timer_prefix(0, 'A', 3); break;
@@ -290,7 +293,7 @@ static void pwm_details(uint8_t pin) {
      case TIMER0B: timer_prefix(0, 'B', 3); break;
    #endif

-    #if ABTEST(1)
+    #if defined(TCCR1A) && defined(COM1A1)
      case TIMER1A: timer_prefix(1, 'A', 4); break;
      case TIMER1B: timer_prefix(1, 'B', 4); break;
      #if defined(COM1C1) && defined(TIMER1C)
@@ -298,12 +301,12 @@ static void pwm_details(uint8_t pin) {
      #endif
    #endif

-    #if ABTEST(2)
+    #if defined(TCCR2A) && defined(COM2A1)
      case TIMER2A: timer_prefix(2, 'A', 3); break;
      case TIMER2B: timer_prefix(2, 'B', 3); break;
    #endif

-    #if ABTEST(3)
+    #if defined(TCCR3A) && defined(COM3A1)
      case TIMER3A: timer_prefix(3, 'A', 4); break;
      case TIMER3B: timer_prefix(3, 'B', 4); break;
      #ifdef COM3C1
@@ -317,7 +320,7 @@ static void pwm_details(uint8_t pin) {
      case TIMER4C: timer_prefix(4, 'C', 4); break;
    #endif

-    #if ABTEST(5)
+    #if defined(TCCR5A) && defined(COM5A1)
      case TIMER5A: timer_prefix(5, 'A', 4); break;
      case TIMER5B: timer_prefix(5, 'B', 4); break;
      case TIMER5C: timer_prefix(5, 'C', 4); break;
@@ -351,6 +354,7 @@ static void pwm_details(uint8_t pin) {
  #endif
 } // pwm_details

+
 #ifndef digitalRead_mod                   // Use Teensyduino's version of digitalRead - it doesn't disable the PWMs
  int digitalRead_mod(const int8_t pin) { // same as digitalRead except the PWM stop section has been removed
    const uint8_t port = digitalPinToPort_DEBUG(pin);
@@ -395,6 +399,3 @@ static void pwm_details(uint8_t pin) {
 #endif

 #define PRINT_PIN(p) do{ sprintf_P(buffer, PSTR("%3d "), p); SERIAL_ECHO(buffer); }while(0)
-#define PRINT_PIN_ANALOG(p) do{ sprintf_P(buffer, PSTR(" (A%2d)  "), DIGITAL_PIN_TO_ANALOG_PIN(pin)); SERIAL_ECHO(buffer); }while(0)
-
-#undef ABTEST
--- a/Marlin/src/HAL/HAL_AVR/pinsDebug_Teensyduino.h
+++ b/Marlin/src/HAL/HAL_AVR/pinsDebug_Teensyduino.h
@@ -1,9 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
@@ -16,7 +13,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_AVR/pinsDebug_plus_70.h
+++ b/Marlin/src/HAL/HAL_AVR/pinsDebug_plus_70.h
@@ -1,9 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
@@ -16,7 +13,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -25,12 +22,15 @@
 * Structures for 2560 family boards that use more than 70 pins
 */

-#if MB(BQ_ZUM_MEGA_3D, MINIRAMBO, SCOOVO_X9H, TRIGORILLA_14)
-  #undef NUM_DIGITAL_PINS
+#undef NUM_DIGITAL_PINS
+#if MB(BQ_ZUM_MEGA_3D)
  #define NUM_DIGITAL_PINS            85
 #elif MB(MIGHTYBOARD_REVE)
-  #undef NUM_DIGITAL_PINS
  #define NUM_DIGITAL_PINS            80
+#elif MB(MINIRAMBO)
+  #define NUM_DIGITAL_PINS            85
+#elif MB(SCOOVO_X9H)
+  #define NUM_DIGITAL_PINS            85
 #endif

 #define PA 1
--- a/Marlin/src/HAL/HAL_AVR/spi_pins.h
+++ b/Marlin/src/HAL/HAL_AVR/spi_pins.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -51,15 +51,15 @@
  #define AVR_SS_PIN   16
 #endif

-#ifndef SD_SCK_PIN
-  #define SD_SCK_PIN  AVR_SCK_PIN
+#ifndef SCK_PIN
+  #define SCK_PIN  AVR_SCK_PIN
 #endif
-#ifndef SD_MISO_PIN
-  #define SD_MISO_PIN AVR_MISO_PIN
+#ifndef MISO_PIN
+  #define MISO_PIN AVR_MISO_PIN
 #endif
-#ifndef SD_MOSI_PIN
-  #define SD_MOSI_PIN AVR_MOSI_PIN
+#ifndef MOSI_PIN
+  #define MOSI_PIN AVR_MOSI_PIN
 #endif
-#ifndef SD_SS_PIN
-  #define SD_SS_PIN   AVR_SS_PIN
+#ifndef SS_PIN
+  #define SS_PIN   AVR_SS_PIN
 #endif
--- a/Marlin/src/HAL/HAL_AVR/u8g_com_HAL_AVR_sw_spi.cpp
+++ b/Marlin/src/HAL/HAL_AVR/u8g_com_HAL_AVR_sw_spi.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -57,15 +57,15 @@

 #include "../../inc/MarlinConfigPre.h"

-#if HAS_MARLINUI_U8GLIB
+#if HAS_GRAPHICAL_LCD

 #include "../shared/Marduino.h"
 #include "../shared/Delay.h"

-#include <U8glib-HAL.h>
+#include <U8glib.h>

-static uint8_t u8g_bitData, u8g_bitNotData, u8g_bitClock, u8g_bitNotClock;
-static volatile uint8_t *u8g_outData, *u8g_outClock;
+uint8_t u8g_bitData, u8g_bitNotData, u8g_bitClock, u8g_bitNotClock;
+volatile uint8_t *u8g_outData, *u8g_outClock;

 static void u8g_com_arduino_init_shift_out(uint8_t dataPin, uint8_t clockPin) {
  u8g_outData = portOutputRegister(digitalPinToPort(dataPin));
@@ -88,7 +88,7 @@ void u8g_spiSend_sw_AVR_mode_0(uint8_t val) {
  volatile uint8_t *outData = u8g_outData,
                   *outClock = u8g_outClock;
  U8G_ATOMIC_START();
-  LOOP_L_N(i, 8) {
+  for (uint8_t i = 0; i < 8; i++) {
    if (val & 0x80)
      *outData |= bitData;
    else
@@ -108,7 +108,7 @@ void u8g_spiSend_sw_AVR_mode_3(uint8_t val) {
  volatile uint8_t *outData = u8g_outData,
                   *outClock = u8g_outClock;
  U8G_ATOMIC_START();
-  LOOP_L_N(i, 8) {
+  for (uint8_t i = 0; i < 8; i++) {
    *outClock &= bitNotClock;
    if (val & 0x80)
      *outData |= bitData;
@@ -189,5 +189,5 @@ uint8_t u8g_com_HAL_AVR_sw_sp_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void
  return 1;
 }

-#endif // HAS_MARLINUI_U8GLIB
+#endif // HAS_GRAPHICAL_LCD
 #endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/HAL_AVR/watchdog.cpp
+++ b/Marlin/src/HAL/HAL_AVR/watchdog.cpp
@@ -0,0 +1,71 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef __AVR__
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(USE_WATCHDOG)
+
+#include "watchdog.h"
+
+#include "../../MarlinCore.h"
+
+// Initialize watchdog with 8s timeout, if possible. Otherwise, make it 4s.
+void watchdog_init() {
+  #if ENABLED(WATCHDOG_DURATION_8S) && defined(WDTO_8S)
+    #define WDTO_NS WDTO_8S
+  #else
+    #define WDTO_NS WDTO_4S
+  #endif
+  #if ENABLED(WATCHDOG_RESET_MANUAL)
+    // Enable the watchdog timer, but only for the interrupt.
+    // Take care, as this requires the correct order of operation, with interrupts disabled.
+    // See the datasheet of any AVR chip for details.
+    wdt_reset();
+    cli();
+    _WD_CONTROL_REG = _BV(_WD_CHANGE_BIT) | _BV(WDE);
+    _WD_CONTROL_REG = _BV(WDIE) | (WDTO_NS & 0x07) | ((WDTO_NS & 0x08) << 2); // WDTO_NS directly does not work. bit 0-2 are consecutive in the register but the highest value bit is at bit 5
+                                                                              // So worked for up to WDTO_2S
+    sei();
+    wdt_reset();
+  #else
+    wdt_enable(WDTO_NS); // The function handles the upper bit correct.
+  #endif
+  //delay(10000); // test it!
+}
+
+//===========================================================================
+//=================================== ISR ===================================
+//===========================================================================
+
+// Watchdog timer interrupt, called if main program blocks >4sec and manual reset is enabled.
+#if ENABLED(WATCHDOG_RESET_MANUAL)
+  ISR(WDT_vect) {
+    sei();  // With the interrupt driven serial we need to allow interrupts.
+    SERIAL_ERROR_MSG(MSG_WATCHDOG_FIRED);
+    minkill();  // interrupt-safe final kill and infinite loop
+  }
+#endif
+
+#endif // USE_WATCHDOG
+#endif // __AVR__
--- a/Marlin/src/HAL/NATIVE_SIM/u8g/LCD_I2C_routines.h
+++ b/Marlin/src/HAL/NATIVE_SIM/u8g/LCD_I2C_routines.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,22 +16,16 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once

-#ifdef __cplusplus
-  extern "C" {
-#endif
+#include <avr/wdt.h>

-void u8g_i2c_init(const uint8_t clock_options);
-//uint8_t u8g_i2c_wait(uint8_t mask, uint8_t pos);
-uint8_t u8g_i2c_start(uint8_t sla);
-uint8_t u8g_i2c_send_byte(uint8_t data);
-void u8g_i2c_stop();
-
-#ifdef __cplusplus
-  }
-#endif
+// Initialize watchdog with a 4 second interrupt time
+void watchdog_init();

+// Reset watchdog. MUST be called at least every 4 seconds after the
+// first watchdog_init or AVR will go into emergency procedures.
+inline void HAL_watchdog_refresh() { wdt_reset(); }
--- a/Marlin/src/HAL/HAL_DUE/DebugMonitor.cpp
+++ b/Marlin/src/HAL/HAL_DUE/DebugMonitor.cpp
@@ -0,0 +1,343 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef ARDUINO_ARCH_SAM
+
+#include "../../core/macros.h"
+#include "../../core/serial.h"
+
+#include "../shared/backtrace/unwinder.h"
+#include "../shared/backtrace/unwmemaccess.h"
+
+#include <stdarg.h>
+
+// Debug monitor that dumps to the Programming port all status when
+// an exception or WDT timeout happens - And then resets the board
+
+// All the Monitor routines must run with interrupts disabled and
+// under an ISR execution context. That is why we cannot reuse the
+// Serial interrupt routines or any C runtime, as we don't know the
+// state we are when running them
+
+// A SW memory barrier, to ensure GCC does not overoptimize loops
+#define sw_barrier() __asm__ volatile("": : :"memory");
+
+// (re)initialize UART0 as a monitor output to 250000,n,8,1
+static void TXBegin() {
+
+  // Disable UART interrupt in NVIC
+  NVIC_DisableIRQ( UART_IRQn );
+
+  // We NEED memory barriers to ensure Interrupts are actually disabled!
+  // ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
+  __DSB();
+  __ISB();
+
+  // Disable clock
+  pmc_disable_periph_clk( ID_UART );
+
+  // Configure PMC
+  pmc_enable_periph_clk( ID_UART );
+
+  // Disable PDC channel
+  UART->UART_PTCR = UART_PTCR_RXTDIS | UART_PTCR_TXTDIS;
+
+  // Reset and disable receiver and transmitter
+  UART->UART_CR = UART_CR_RSTRX | UART_CR_RSTTX | UART_CR_RXDIS | UART_CR_TXDIS;
+
+  // Configure mode: 8bit, No parity, 1 bit stop
+  UART->UART_MR = UART_MR_CHMODE_NORMAL | US_MR_CHRL_8_BIT | US_MR_NBSTOP_1_BIT | UART_MR_PAR_NO;
+
+  // Configure baudrate (asynchronous, no oversampling) to BAUDRATE bauds
+  UART->UART_BRGR = (SystemCoreClock / (BAUDRATE << 4));
+
+  // Enable receiver and transmitter
+  UART->UART_CR = UART_CR_RXEN | UART_CR_TXEN;
+}
+
+// Send character through UART with no interrupts
+static void TX(char c) {
+  while (!(UART->UART_SR & UART_SR_TXRDY)) { WDT_Restart(WDT); sw_barrier(); };
+  UART->UART_THR = c;
+}
+
+// Send String through UART
+static void TX(const char* s) {
+  while (*s) TX(*s++);
+}
+
+static void TXDigit(uint32_t d) {
+  if (d < 10) TX((char)(d+'0'));
+  else if (d < 16) TX((char)(d+'A'-10));
+  else TX('?');
+}
+
+// Send Hex number thru UART
+static void TXHex(uint32_t v) {
+  TX("0x");
+  for (uint8_t i = 0; i < 8; i++, v <<= 4)
+    TXDigit((v >> 28) & 0xF);
+}
+
+// Send Decimal number thru UART
+static void TXDec(uint32_t v) {
+  if (!v) {
+    TX('0');
+    return;
+  }
+
+  char nbrs[14];
+  char *p = &nbrs[0];
+  while (v != 0) {
+    *p++ = '0' + (v % 10);
+    v /= 10;
+  }
+  do {
+    p--;
+    TX(*p);
+  } while (p != &nbrs[0]);
+}
+
+// Dump a backtrace entry
+static bool UnwReportOut(void* ctx, const UnwReport* bte) {
+  int* p = (int*)ctx;
+
+  (*p)++;
+  TX('#'); TXDec(*p); TX(" : ");
+  TX(bte->name?bte->name:"unknown"); TX('@'); TXHex(bte->function);
+  TX('+'); TXDec(bte->address - bte->function);
+  TX(" PC:");TXHex(bte->address); TX('\n');
+  return true;
+}
+
+#ifdef UNW_DEBUG
+  void UnwPrintf(const char* format, ...) {
+    char dest[256];
+    va_list argptr;
+    va_start(argptr, format);
+    vsprintf(dest, format, argptr);
+    va_end(argptr);
+    TX(&dest[0]);
+  }
+#endif
+
+/* Table of function pointers for passing to the unwinder */
+static const UnwindCallbacks UnwCallbacks = {
+  UnwReportOut,
+  UnwReadW,
+  UnwReadH,
+  UnwReadB
+  #ifdef UNW_DEBUG
+   , UnwPrintf
+  #endif
+};
+
+/**
+ * HardFaultHandler_C:
+ * This is called from the HardFault_HandlerAsm with a pointer the Fault stack
+ * as the parameter. We can then read the values from the stack and place them
+ * into local variables for ease of reading.
+ * We then read the various Fault Status and Address Registers to help decode
+ * cause of the fault.
+ * The function ends with a BKPT instruction to force control back into the debugger
+ */
+extern "C"
+void HardFault_HandlerC(unsigned long *sp, unsigned long lr, unsigned long cause) {
+
+  static const char* causestr[] = {
+    "NMI","Hard","Mem","Bus","Usage","Debug","WDT","RSTC"
+  };
+
+  UnwindFrame btf;
+
+  // Dump report to the Programming port (interrupts are DISABLED)
+  TXBegin();
+  TX("\n\n## Software Fault detected ##\n");
+  TX("Cause: "); TX(causestr[cause]); TX('\n');
+
+  TX("R0   : "); TXHex(((unsigned long)sp[0])); TX('\n');
+  TX("R1   : "); TXHex(((unsigned long)sp[1])); TX('\n');
+  TX("R2   : "); TXHex(((unsigned long)sp[2])); TX('\n');
+  TX("R3   : "); TXHex(((unsigned long)sp[3])); TX('\n');
+  TX("R12  : "); TXHex(((unsigned long)sp[4])); TX('\n');
+  TX("LR   : "); TXHex(((unsigned long)sp[5])); TX('\n');
+  TX("PC   : "); TXHex(((unsigned long)sp[6])); TX('\n');
+  TX("PSR  : "); TXHex(((unsigned long)sp[7])); TX('\n');
+
+  // Configurable Fault Status Register
+  // Consists of MMSR, BFSR and UFSR
+  TX("CFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED28)))); TX('\n');
+
+  // Hard Fault Status Register
+  TX("HFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED2C)))); TX('\n');
+
+  // Debug Fault Status Register
+  TX("DFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED30)))); TX('\n');
+
+  // Auxiliary Fault Status Register
+  TX("AFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED3C)))); TX('\n');
+
+  // Read the Fault Address Registers. These may not contain valid values.
+  // Check BFARVALID/MMARVALID to see if they are valid values
+  // MemManage Fault Address Register
+  TX("MMAR : "); TXHex((*((volatile unsigned long *)(0xE000ED34)))); TX('\n');
+
+  // Bus Fault Address Register
+  TX("BFAR : "); TXHex((*((volatile unsigned long *)(0xE000ED38)))); TX('\n');
+
+  TX("ExcLR: "); TXHex(lr); TX('\n');
+  TX("ExcSP: "); TXHex((unsigned long)sp); TX('\n');
+
+  btf.sp = ((unsigned long)sp) + 8*4; // The original stack pointer
+  btf.fp = btf.sp;
+  btf.lr = ((unsigned long)sp[5]);
+  btf.pc = ((unsigned long)sp[6]) | 1; // Force Thumb, as CORTEX only support it
+
+  // Perform a backtrace
+  TX("\nBacktrace:\n\n");
+  int ctr = 0;
+  UnwindStart(&btf, &UnwCallbacks, &ctr);
+
+  // Disable all NVIC interrupts
+  NVIC->ICER[0] = 0xFFFFFFFF;
+  NVIC->ICER[1] = 0xFFFFFFFF;
+
+  // Relocate VTOR table to default position
+  SCB->VTOR = 0;
+
+  // Disable USB
+  otg_disable();
+
+  // Restart watchdog
+  WDT_Restart(WDT);
+
+  // Reset controller
+  NVIC_SystemReset();
+  for (;;) WDT_Restart(WDT);
+}
+
+__attribute__((naked)) void NMI_Handler() {
+  __asm__ __volatile__ (
+    ".syntax unified" "\n\t"
+    A("tst lr, #4")
+    A("ite eq")
+    A("mrseq r0, msp")
+    A("mrsne r0, psp")
+    A("mov r1,lr")
+    A("mov r2,#0")
+    A("b HardFault_HandlerC")
+  );
+}
+
+__attribute__((naked)) void HardFault_Handler() {
+  __asm__ __volatile__ (
+    ".syntax unified" "\n\t"
+    A("tst lr, #4")
+    A("ite eq")
+    A("mrseq r0, msp")
+    A("mrsne r0, psp")
+    A("mov r1,lr")
+    A("mov r2,#1")
+    A("b HardFault_HandlerC")
+  );
+}
+
+__attribute__((naked)) void MemManage_Handler() {
+  __asm__ __volatile__ (
+    ".syntax unified" "\n\t"
+    A("tst lr, #4")
+    A("ite eq")
+    A("mrseq r0, msp")
+    A("mrsne r0, psp")
+    A("mov r1,lr")
+    A("mov r2,#2")
+    A("b HardFault_HandlerC")
+  );
+}
+
+__attribute__((naked)) void BusFault_Handler() {
+  __asm__ __volatile__ (
+    ".syntax unified" "\n\t"
+    A("tst lr, #4")
+    A("ite eq")
+    A("mrseq r0, msp")
+    A("mrsne r0, psp")
+    A("mov r1,lr")
+    A("mov r2,#3")
+    A("b HardFault_HandlerC")
+  );
+}
+
+__attribute__((naked)) void UsageFault_Handler() {
+  __asm__ __volatile__ (
+    ".syntax unified" "\n\t"
+    A("tst lr, #4")
+    A("ite eq")
+    A("mrseq r0, msp")
+    A("mrsne r0, psp")
+    A("mov r1,lr")
+    A("mov r2,#4")
+    A("b HardFault_HandlerC")
+  );
+}
+
+__attribute__((naked)) void DebugMon_Handler() {
+  __asm__ __volatile__ (
+    ".syntax unified" "\n\t"
+    A("tst lr, #4")
+    A("ite eq")
+    A("mrseq r0, msp")
+    A("mrsne r0, psp")
+    A("mov r1,lr")
+    A("mov r2,#5")
+    A("b HardFault_HandlerC")
+  );
+}
+
+/* This is NOT an exception, it is an interrupt handler - Nevertheless, the framing is the same */
+__attribute__((naked)) void WDT_Handler() {
+  __asm__ __volatile__ (
+    ".syntax unified" "\n\t"
+    A("tst lr, #4")
+    A("ite eq")
+    A("mrseq r0, msp")
+    A("mrsne r0, psp")
+    A("mov r1,lr")
+    A("mov r2,#6")
+    A("b HardFault_HandlerC")
+  );
+}
+
+__attribute__((naked)) void RSTC_Handler() {
+  __asm__ __volatile__ (
+    ".syntax unified" "\n\t"
+    A("tst lr, #4")
+    A("ite eq")
+    A("mrseq r0, msp")
+    A("mrsne r0, psp")
+    A("mov r1,lr")
+    A("mov r2,#7")
+    A("b HardFault_HandlerC")
+  );
+}
+
+#endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/HAL_DUE/EepromEmulation.cpp
+++ b/Marlin/src/HAL/HAL_DUE/EepromEmulation.cpp
@@ -1,30 +1,3 @@
-/**
- * Marlin 3D Printer Firmware
- *
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
- * Copyright (c) 2016 Victor Perez victor_pv@hotmail.com
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- */
-#ifdef ARDUINO_ARCH_SAM
-
-#include "../../inc/MarlinConfig.h"
-
-#if ENABLED(FLASH_EEPROM_EMULATION)

 /* EEPROM emulation over flash with reduced wear
 *
@@ -53,14 +26,22 @@
 * per page. We can't emulate EE endurance with FLASH for all
 * bytes, but we can emulate endurance for a given percent of
 * bytes.
+ *
 */

-//#define EE_EMU_DEBUG
+#ifdef ARDUINO_ARCH_SAM
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(EEPROM_SETTINGS) && NONE(I2C_EEPROM, SPI_EEPROM)
+
+#include "../shared/Marduino.h"
+#include "../shared/persistent_store_api.h"

 #define EEPROMSize     4096
 #define PagesPerGroup   128
 #define GroupCount        2
-#define PageSize        256U
+#define PageSize        256u

 /* Flash storage */
 typedef struct FLASH_SECTOR {
@@ -132,18 +113,15 @@ static uint8_t buffer[256] = {0},   // The RAM buffer to accumulate writes
               curPage = 0,         // Current FLASH page inside the group
               curGroup = 0xFF;     // Current FLASH group

-#define DEBUG_OUT ENABLED(EE_EMU_DEBUG)
-#include "../../core/debug_out.h"
+//#define EE_EMU_DEBUG
+#ifdef EE_EMU_DEBUG
+  static void ee_Dump(int page,const void* data) {

-static void ee_Dump(const int page, const void *data) {
-
-  #ifdef EE_EMU_DEBUG
-
-    const uint8_t *c = (const uint8_t*) data;
+    const uint8_t* c = (const uint8_t*) data;
    char buffer[80];

    sprintf_P(buffer, PSTR("Page: %d (0x%04x)\n"), page, page);
-    DEBUG_ECHO(buffer);
+    SERIAL_ECHO(buffer);

    char* p = &buffer[0];
    for (int i = 0; i< PageSize; ++i) {
@@ -153,16 +131,12 @@ static void ee_Dump(const int page, const void *data) {
      if ((i & 0xF) == 0xF) {
        *p++ = '\n';
        *p = 0;
-        DEBUG_ECHO(buffer);
+        SERIAL_ECHO(buffer);
        p = &buffer[0];
      }
    }
-
-  #else
-    UNUSED(page);
-    UNUSED(data);
-  #endif
-}
+  }
+#endif

 /* Flash Writing Protection Key */
 #define FWP_KEY    0x5Au
@@ -175,16 +149,17 @@ static void ee_Dump(const int page, const void *data) {
  #define EEFC_ERROR_FLAGS  (EEFC_FSR_FLOCKE | EEFC_FSR_FCMDE)
 #endif

+
 /**
 * Writes the contents of the specified page (no previous erase)
 * @param page    (page #)
 * @param data    (pointer to the data buffer)
 */
 __attribute__ ((long_call, section (".ramfunc")))
-static bool ee_PageWrite(uint16_t page, const void *data) {
+static bool ee_PageWrite(uint16_t page,const void* data) {

  uint16_t i;
-  uint32_t addrflash = uint32_t(getFlashStorage(page));
+  uint32_t addrflash = ((uint32_t)getFlashStorage(page));

  // Read the flash contents
  uint32_t pageContents[PageSize>>2];
@@ -199,10 +174,13 @@ static bool ee_PageWrite(uint16_t page, const void *data) {
  for (i = 0; i <PageSize >> 2; i++)
    pageContents[i] = (((uint32_t*)data)[i]) | (~(pageContents[i] ^ ((uint32_t*)data)[i]));

-  DEBUG_ECHO_MSG("EEPROM PageWrite   ", page);
-  DEBUG_ECHOLNPGM(" in FLASH address ", (uint32_t)addrflash);
-  DEBUG_ECHOLNPGM(" base address     ", (uint32_t)getFlashStorage(0));
-  DEBUG_FLUSH();
+  #ifdef EE_EMU_DEBUG
+    SERIAL_ECHO_START();
+    SERIAL_ECHOLNPAIR("EEPROM PageWrite   ", page);
+    SERIAL_ECHOLNPAIR(" in FLASH address ", (uint32_t)addrflash);
+    SERIAL_ECHOLNPAIR(" base address     ", (uint32_t)getFlashStorage(0));
+    SERIAL_FLUSH();
+  #endif

  // Get the page relative to the start of the EFC controller, and the EFC controller to use
  Efc *efc;
@@ -244,7 +222,10 @@ static bool ee_PageWrite(uint16_t page, const void *data) {
    // Reenable interrupts
    __enable_irq();

-    DEBUG_ECHO_MSG("EEPROM Unlock failure for page ", page);
+    #ifdef EE_EMU_DEBUG
+      SERIAL_ECHO_START();
+      SERIAL_ECHOLNPAIR("EEPROM Unlock failure for page ", page);
+    #endif
    return false;
  }

@@ -268,8 +249,10 @@ static bool ee_PageWrite(uint16_t page, const void *data) {
    // Reenable interrupts
    __enable_irq();

-    DEBUG_ECHO_MSG("EEPROM Write failure for page ", page);
-
+    #ifdef EE_EMU_DEBUG
+      SERIAL_ECHO_START();
+      SERIAL_ECHOLNPAIR("EEPROM Write failure for page ", page);
+    #endif
    return false;
  }

@@ -283,14 +266,15 @@ static bool ee_PageWrite(uint16_t page, const void *data) {
  if (memcmp(getFlashStorage(page),data,PageSize)) {

    #ifdef EE_EMU_DEBUG
-      DEBUG_ECHO_MSG("EEPROM Verify Write failure for page ", page);
+      SERIAL_ECHO_START();
+      SERIAL_ECHOLNPAIR("EEPROM Verify Write failure for page ", page);

-      ee_Dump( page, (uint32_t *)addrflash);
-      ee_Dump(-page, data);
+      ee_Dump( page,(uint32_t *) addrflash);
+      ee_Dump(-page,data);

      // Calculate count of changed bits
-      uint32_t *p1 = (uint32_t*)addrflash;
-      uint32_t *p2 = (uint32_t*)data;
+      uint32_t* p1 = (uint32_t*)addrflash;
+      uint32_t* p2 = (uint32_t*)data;
      int count = 0;
      for (i =0; i<PageSize >> 2; i++) {
        if (p1[i] != p2[i]) {
@@ -302,7 +286,7 @@ static bool ee_PageWrite(uint16_t page, const void *data) {
          }
        }
      }
-      DEBUG_ECHOLNPGM("--> Differing bits: ", count);
+      SERIAL_ECHOLNPAIR("--> Differing bits: ", count);
    #endif

    return false;
@@ -319,12 +303,15 @@ __attribute__ ((long_call, section (".ramfunc")))
 static bool ee_PageErase(uint16_t page) {

  uint16_t i;
-  uint32_t addrflash = uint32_t(getFlashStorage(page));
+  uint32_t addrflash = ((uint32_t)getFlashStorage(page));

-  DEBUG_ECHO_MSG("EEPROM PageErase  ", page);
-  DEBUG_ECHOLNPGM(" in FLASH address ", (uint32_t)addrflash);
-  DEBUG_ECHOLNPGM(" base address     ", (uint32_t)getFlashStorage(0));
-  DEBUG_FLUSH();
+  #ifdef EE_EMU_DEBUG
+    SERIAL_ECHO_START();
+    SERIAL_ECHOLNPAIR("EEPROM PageErase  ", page);
+    SERIAL_ECHOLNPAIR(" in FLASH address ", (uint32_t)addrflash);
+    SERIAL_ECHOLNPAIR(" base address     ", (uint32_t)getFlashStorage(0));
+    SERIAL_FLUSH();
+  #endif

  // Get the page relative to the start of the EFC controller, and the EFC controller to use
  Efc *efc;
@@ -365,8 +352,10 @@ static bool ee_PageErase(uint16_t page) {
    // Reenable interrupts
    __enable_irq();

-    DEBUG_ECHO_MSG("EEPROM Unlock failure for page ",page);
-
+    #ifdef EE_EMU_DEBUG
+      SERIAL_ECHO_START();
+      SERIAL_ECHOLNPAIR("EEPROM Unlock failure for page ",page);
+    #endif
    return false;
  }

@@ -388,8 +377,10 @@ static bool ee_PageErase(uint16_t page) {
    // Reenable interrupts
    __enable_irq();

-    DEBUG_ECHO_MSG("EEPROM Erase failure for page ",page);
-
+    #ifdef EE_EMU_DEBUG
+      SERIAL_ECHO_START();
+      SERIAL_ECHOLNPAIR("EEPROM Erase failure for page ",page);
+    #endif
    return false;
  }

@@ -403,16 +394,20 @@ static bool ee_PageErase(uint16_t page) {
  uint32_t * aligned_src = (uint32_t *) addrflash;
  for (i = 0; i < PageSize >> 2; i++) {
    if (*aligned_src++ != 0xFFFFFFFF) {
-      DEBUG_ECHO_MSG("EEPROM Verify Erase failure for page ",page);
-      ee_Dump(page, (uint32_t *)addrflash);
+
+      #ifdef EE_EMU_DEBUG
+        SERIAL_ECHO_START();
+        SERIAL_ECHOLNPAIR("EEPROM Verify Erase failure for page ",page);
+
+        ee_Dump( page,(uint32_t *) addrflash);
+      #endif
      return false;
    }
  }

  return true;
 }
-
-static uint8_t ee_Read(uint32_t address, bool excludeRAMBuffer=false) {
+static uint8_t ee_Read(uint32_t address, bool excludeRAMBuffer = false) {

  uint32_t baddr;
  uint32_t blen;
@@ -462,7 +457,7 @@ static uint8_t ee_Read(uint32_t address, bool excludeRAMBuffer=false) {
  for (int page = curPage - 1; page >= 0; --page) {

    // Get a pointer to the flash page
-    uint8_t *pflash = (uint8_t*)getFlashStorage(page + curGroup * PagesPerGroup);
+    uint8_t* pflash = (uint8_t*)getFlashStorage(page + curGroup * PagesPerGroup);

    uint16_t i = 0;
    while (i <= (PageSize - 4)) { /* (PageSize - 4) because otherwise, there is not enough room for data and headers */
@@ -495,7 +490,7 @@ static uint8_t ee_Read(uint32_t address, bool excludeRAMBuffer=false) {
  return 0xFF;
 }

-static uint32_t ee_GetAddrRange(uint32_t address, bool excludeRAMBuffer=false) {
+static uint32_t ee_GetAddrRange(uint32_t address, bool excludeRAMBuffer = false) {
  uint32_t baddr,
           blen,
           nextAddr = 0xFFFF,
@@ -542,7 +537,7 @@ static uint32_t ee_GetAddrRange(uint32_t address, bool excludeRAMBuffer=false) {
  for (int page = curPage - 1; page >= 0; --page) {

    // Get a pointer to the flash page
-    uint8_t *pflash = (uint8_t*)getFlashStorage(page + curGroup * PagesPerGroup);
+    uint8_t* pflash = (uint8_t*)getFlashStorage(page + curGroup * PagesPerGroup);

    uint16_t i = 0;
    while (i <= (PageSize - 4)) { /* (PageSize - 4) because otherwise, there is not enough room for data and headers */
@@ -581,17 +576,17 @@ static uint32_t ee_GetAddrRange(uint32_t address, bool excludeRAMBuffer=false) {
 }

 static bool ee_IsPageClean(int page) {
-  uint32_t *pflash = (uint32_t*) getFlashStorage(page);
+  uint32_t* pflash = (uint32_t*) getFlashStorage(page);
  for (uint16_t i = 0; i < (PageSize >> 2); ++i)
    if (*pflash++ != 0xFFFFFFFF) return false;
  return true;
 }

-static bool ee_Flush(uint32_t overrideAddress = 0xFFFFFFFF, uint8_t overrideData=0xFF) {
+static bool ee_Flush(uint32_t overrideAddress = 0xFFFFFFFF, uint8_t overrideData = 0xFF) {

  // Check if RAM buffer has something to be written
  bool isEmpty = true;
-  uint32_t *p = (uint32_t*) &buffer[0];
+  uint32_t* p = (uint32_t*) &buffer[0];
  for (uint16_t j = 0; j < (PageSize >> 2); j++) {
    if (*p++ != 0xFFFFFFFF) {
      isEmpty = false;
@@ -913,8 +908,11 @@ static void ee_Init() {
  // If all groups seem to be used, default to first group
  if (curGroup >= GroupCount) curGroup = 0;

-  DEBUG_ECHO_MSG("EEPROM Current Group: ",curGroup);
-  DEBUG_FLUSH();
+  #ifdef EE_EMU_DEBUG
+    SERIAL_ECHO_START();
+    SERIAL_ECHOLNPAIR("EEPROM Current Group: ",curGroup);
+    SERIAL_FLUSH();
+  #endif

  // Now, validate that all the other group pages are empty
  for (int grp = 0; grp < GroupCount; grp++) {
@@ -922,8 +920,11 @@ static void ee_Init() {

    for (int page = 0; page < PagesPerGroup; page++) {
      if (!ee_IsPageClean(grp * PagesPerGroup + page)) {
-        DEBUG_ECHO_MSG("EEPROM Page ", page, " not clean on group ", grp);
-        DEBUG_FLUSH();
+        #ifdef EE_EMU_DEBUG
+          SERIAL_ECHO_START();
+          SERIAL_ECHOLNPAIR("EEPROM Page ", page, " not clean on group ", grp);
+          SERIAL_FLUSH();
+        #endif
        ee_PageErase(grp * PagesPerGroup + page);
      }
    }
@@ -933,66 +934,66 @@ static void ee_Init() {
  // and also validate that all the other ones are clean
  for (curPage = 0; curPage < PagesPerGroup; curPage++) {
    if (ee_IsPageClean(curGroup * PagesPerGroup + curPage)) {
-      ee_Dump(curGroup * PagesPerGroup + curPage, getFlashStorage(curGroup * PagesPerGroup + curPage));
+      #ifdef EE_EMU_DEBUG
+        ee_Dump(curGroup * PagesPerGroup + curPage, getFlashStorage(curGroup * PagesPerGroup + curPage));
+      #endif
      break;
    }
  }

-  DEBUG_ECHO_MSG("EEPROM Active page: ", curPage);
-  DEBUG_FLUSH();
+  #ifdef EE_EMU_DEBUG
+    SERIAL_ECHO_START();
+    SERIAL_ECHOLNPAIR("EEPROM Active page: ", curPage);
+    SERIAL_FLUSH();
+  #endif

  // Make sure the pages following the first clean one are also clean
  for (int page = curPage + 1; page < PagesPerGroup; page++) {
    if (!ee_IsPageClean(curGroup * PagesPerGroup + page)) {
-      DEBUG_ECHO_MSG("EEPROM Page ", page, " not clean on active group ", curGroup);
-      DEBUG_FLUSH();
-      ee_Dump(curGroup * PagesPerGroup + page, getFlashStorage(curGroup * PagesPerGroup + page));
+      #ifdef EE_EMU_DEBUG
+        SERIAL_ECHO_START();
+        SERIAL_ECHOLNPAIR("EEPROM Page ", page, " not clean on active group ", curGroup);
+        SERIAL_FLUSH();
+        ee_Dump(curGroup * PagesPerGroup + page, getFlashStorage(curGroup * PagesPerGroup + page));
+      #endif
      ee_PageErase(curGroup * PagesPerGroup + page);
    }
  }
 }

-/* PersistentStore -----------------------------------------------------------*/
+uint8_t eeprom_read_byte(uint8_t* addr) {
+  ee_Init();
+  return ee_Read((uint32_t)addr);
+}

-#include "../shared/eeprom_api.h"
+void eeprom_write_byte(uint8_t* addr, uint8_t value) {
+  ee_Init();
+  ee_Write((uint32_t)addr, value);
+}

-#ifndef MARLIN_EEPROM_SIZE
-  #define MARLIN_EEPROM_SIZE 0x1000 // 4KB
-#endif
-size_t PersistentStore::capacity()    { return MARLIN_EEPROM_SIZE; }
-bool PersistentStore::access_start()  { ee_Init();  return true; }
-bool PersistentStore::access_finish() { ee_Flush(); return true; }
-
-bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
-  uint16_t written = 0;
-  while (size--) {
-    uint8_t * const p = (uint8_t * const)pos;
-    uint8_t v = *value;
-    if (v != ee_Read(uint32_t(p))) { // EEPROM has only ~100,000 write cycles, so only write bytes that have changed!
-      ee_Write(uint32_t(p), v);
-      if (++written & 0x7F) delay(2); else safe_delay(2); // Avoid triggering watchdog during long EEPROM writes
-      if (ee_Read(uint32_t(p)) != v) {
-        SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
-        return true;
-      }
-    }
-    crc16(crc, &v, 1);
-    pos++;
-    value++;
+void eeprom_update_block(const void* __src, void* __dst, size_t __n) {
+  uint8_t* dst = (uint8_t*)__dst;
+  const uint8_t* src = (const uint8_t*)__src;
+  while (__n--) {
+    eeprom_write_byte(dst, *src);
+    ++dst;
+    ++src;
  }
-  return false;
 }

-bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
-  do {
-    uint8_t c = ee_Read(uint32_t(pos));
-    if (writing) *value = c;
-    crc16(crc, &c, 1);
-    pos++;
-    value++;
-  } while (--size);
-  return false;
+void eeprom_read_block(void* __dst, const void* __src, size_t __n) {
+  uint8_t* dst = (uint8_t*)__dst;
+  uint8_t* src = (uint8_t*)__src;
+  while (__n--) {
+    *dst = eeprom_read_byte(src);
+    ++dst;
+    ++src;
+  }
 }

-#endif // FLASH_EEPROM_EMULATION
-#endif // ARDUINO_ARCH_SAM
+void eeprom_flush() {
+  ee_Flush();
+}
+
+#endif // EEPROM_SETTINGS && (!I2C_EEPROM && !SPI_EEPROM)
+#endif // ARDUINO_ARCH_AVR
--- a/Marlin/src/HAL/HAL_DUE/HAL.cpp
+++ b/Marlin/src/HAL/HAL_DUE/HAL.cpp
@@ -0,0 +1,106 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Description: HAL for Arduino Due and compatible (SAM3X8E)
+ *
+ * For ARDUINO_ARCH_SAM
+ */
+
+#ifdef ARDUINO_ARCH_SAM
+
+#include "../../inc/MarlinConfig.h"
+#include "HAL.h"
+
+#include <Wire.h>
+#include "usb/usb_task.h"
+
+// ------------------------
+// Public Variables
+// ------------------------
+
+uint16_t HAL_adc_result;
+
+// ------------------------
+// Public functions
+// ------------------------
+
+// HAL initialization task
+void HAL_init() {
+  // Initialize the USB stack
+  #if ENABLED(SDSUPPORT)
+    OUT_WRITE(SDSS, HIGH);  // Try to set SDSS inactive before any other SPI users start up
+  #endif
+  usb_task_init();
+}
+
+// HAL idle task
+void HAL_idletask() {
+  // Perform USB stack housekeeping
+  usb_task_idle();
+}
+
+// Disable interrupts
+void cli() { noInterrupts(); }
+
+// Enable interrupts
+void sei() { interrupts(); }
+
+void HAL_clear_reset_source() { }
+
+uint8_t HAL_get_reset_source() {
+  switch ((RSTC->RSTC_SR >> 8) & 0x07) {
+    case 0: return RST_POWER_ON;
+    case 1: return RST_BACKUP;
+    case 2: return RST_WATCHDOG;
+    case 3: return RST_SOFTWARE;
+    case 4: return RST_EXTERNAL;
+    default: return 0;
+  }
+}
+
+void _delay_ms(const int delay_ms) {
+  // Todo: port for Due?
+  delay(delay_ms);
+}
+
+extern "C" {
+  extern unsigned int _ebss; // end of bss section
+}
+
+// Return free memory between end of heap (or end bss) and whatever is current
+int freeMemory() {
+  int free_memory, heap_end = (int)_sbrk(0);
+  return (int)&free_memory - (heap_end ?: (int)&_ebss);
+}
+
+// ------------------------
+// ADC
+// ------------------------
+
+void HAL_adc_start_conversion(const uint8_t ch) {
+  HAL_adc_result = analogRead(ch);
+}
+
+uint16_t HAL_adc_get_result() {
+  // nop
+  return HAL_adc_result;
+}
+
+#endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/HAL_DUE/HAL.h
+++ b/Marlin/src/HAL/HAL_DUE/HAL.h
@@ -0,0 +1,198 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * Description: HAL for Arduino Due and compatible (SAM3X8E)
+ *
+ * For ARDUINO_ARCH_SAM
+ */
+
+#define CPU_32_BIT
+
+#include "../shared/Marduino.h"
+#include "../shared/math_32bit.h"
+#include "../shared/HAL_SPI.h"
+#include "fastio.h"
+#include "watchdog.h"
+#include "timers.h"
+
+#include <stdint.h>
+
+// Define MYSERIAL0/1 before MarlinSerial includes!
+#if SERIAL_PORT == -1
+  #define MYSERIAL0 customizedSerial1
+#elif SERIAL_PORT == 0
+  #define MYSERIAL0 Serial
+#elif SERIAL_PORT == 1
+  #define MYSERIAL0 Serial1
+#elif SERIAL_PORT == 2
+  #define MYSERIAL0 Serial2
+#elif SERIAL_PORT == 3
+  #define MYSERIAL0 Serial3
+#else
+  #error "The required SERIAL_PORT must be from -1 to 3. Please update your configuration."
+#endif
+
+#ifdef SERIAL_PORT_2
+  #if SERIAL_PORT_2 == SERIAL_PORT
+    #error "SERIAL_PORT_2 must be different from SERIAL_PORT. Please update your configuration."
+  #elif SERIAL_PORT_2 == -1
+    #define MYSERIAL1 customizedSerial2
+  #elif SERIAL_PORT_2 == 0
+    #define MYSERIAL1 Serial
+  #elif SERIAL_PORT_2 == 1
+    #define MYSERIAL1 Serial1
+  #elif SERIAL_PORT_2 == 2
+    #define MYSERIAL1 Serial2
+  #elif SERIAL_PORT_2 == 3
+    #define MYSERIAL1 Serial3
+  #else
+    #error "SERIAL_PORT_2 must be from -1 to 3. Please update your configuration."
+  #endif
+  #define NUM_SERIAL 2
+#else
+  #define NUM_SERIAL 1
+#endif
+
+#ifdef DGUS_SERIAL_PORT
+  #if DGUS_SERIAL_PORT == SERIAL_PORT
+    #error "DGUS_SERIAL_PORT must be different from SERIAL_PORT. Please update your configuration."
+  #elif defined(SERIAL_PORT_2) && DGUS_SERIAL_PORT == SERIAL_PORT_2
+    #error "DGUS_SERIAL_PORT must be different than SERIAL_PORT_2. Please update your configuration."
+  #elif DGUS_SERIAL_PORT == -1
+    #define DGUS_SERIAL internalDgusSerial
+  #elif DGUS_SERIAL_PORT == 0
+    #define DGUS_SERIAL Serial
+  #elif DGUS_SERIAL_PORT == 1
+    #define DGUS_SERIAL Serial1
+  #elif DGUS_SERIAL_PORT == 2
+    #define DGUS_SERIAL Serial2
+  #elif DGUS_SERIAL_PORT == 3
+    #define DGUS_SERIAL Serial3
+  #else
+    #error "DGUS_SERIAL_PORT must be from -1 to 3. Please update your configuration."
+  #endif
+#endif
+
+
+#include "MarlinSerial.h"
+#include "MarlinSerialUSB.h"
+
+// On AVR this is in math.h?
+#define square(x) ((x)*(x))
+
+#ifndef strncpy_P
+  #define strncpy_P(dest, src, num) strncpy((dest), (src), (num))
+#endif
+
+// Fix bug in pgm_read_ptr
+#undef pgm_read_ptr
+#define pgm_read_ptr(addr) (*((void**)(addr)))
+#undef pgm_read_word
+#define pgm_read_word(addr) (*((uint16_t*)(addr)))
+
+typedef int8_t pin_t;
+
+#define SHARED_SERVOS HAS_SERVOS
+#define HAL_SERVO_LIB Servo
+
+//
+// Interrupts
+//
+#define CRITICAL_SECTION_START  uint32_t primask = __get_PRIMASK(); __disable_irq()
+#define CRITICAL_SECTION_END    if (!primask) __enable_irq()
+#define ISRS_ENABLED() (!__get_PRIMASK())
+#define ENABLE_ISRS()  __enable_irq()
+#define DISABLE_ISRS() __disable_irq()
+
+void cli();                     // Disable interrupts
+void sei();                     // Enable interrupts
+
+void HAL_clear_reset_source();  // clear reset reason
+uint8_t HAL_get_reset_source(); // get reset reason
+
+//
+// EEPROM
+//
+void eeprom_write_byte(uint8_t *pos, unsigned char value);
+uint8_t eeprom_read_byte(uint8_t *pos);
+void eeprom_read_block (void *__dst, const void *__src, size_t __n);
+void eeprom_update_block (const void *__src, void *__dst, size_t __n);
+
+//
+// ADC
+//
+extern uint16_t HAL_adc_result;     // result of last ADC conversion
+
+#ifndef analogInputToDigitalPin
+  #define analogInputToDigitalPin(p) ((p < 12u) ? (p) + 54u : -1)
+#endif
+
+#define HAL_ANALOG_SELECT(ch)
+
+inline void HAL_adc_init() {}//todo
+
+#define HAL_START_ADC(ch)   HAL_adc_start_conversion(ch)
+#define HAL_ADC_RESOLUTION  10
+#define HAL_READ_ADC()      HAL_adc_result
+#define HAL_ADC_READY()     true
+
+void HAL_adc_start_conversion(const uint8_t ch);
+uint16_t HAL_adc_get_result();
+
+//
+// Pin Map
+//
+#define GET_PIN_MAP_PIN(index) index
+#define GET_PIN_MAP_INDEX(pin) pin
+#define PARSED_PIN_INDEX(code, dval) parser.intval(code, dval)
+
+//
+// Tone
+//
+void toneInit();
+void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration=0);
+void noTone(const pin_t _pin);
+
+// Enable hooks into idle and setup for HAL
+#define HAL_IDLETASK 1
+void HAL_idletask();
+void HAL_init();
+
+//
+// Utility functions
+//
+void _delay_ms(const int delay);
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-function"
+int freeMemory();
+#pragma GCC diagnostic pop
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+char *dtostrf(double __val, signed char __width, unsigned char __prec, char *__s);
+#ifdef __cplusplus
+  }
+#endif
--- a/Marlin/src/HAL/HAL_DUE/HAL_SPI.cpp
+++ b/Marlin/src/HAL/HAL_DUE/HAL_SPI.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -30,7 +30,9 @@
 */

 /**
- * HAL for Arduino Due and compatible (SAM3X8E)
+ * Description: HAL for Arduino Due and compatible (SAM3X8E)
+ *
+ * For ARDUINO_ARCH_SAM
 */

 #ifdef ARDUINO_ARCH_SAM
@@ -54,8 +56,8 @@
  #pragma GCC optimize (3)

  typedef uint8_t (*pfnSpiTransfer)(uint8_t b);
-  typedef void    (*pfnSpiRxBlock)(uint8_t *buf, uint32_t nbyte);
-  typedef void    (*pfnSpiTxBlock)(const uint8_t *buf, uint32_t nbyte);
+  typedef void    (*pfnSpiRxBlock)(uint8_t* buf, uint32_t nbyte);
+  typedef void    (*pfnSpiTxBlock)(const uint8_t* buf, uint32_t nbyte);

  /* ---------------- Macros to be able to access definitions from asm */
  #define _PORT(IO) DIO ##  IO ## _WPORT
@@ -67,10 +69,10 @@

  // run at ~8 .. ~10Mhz - Tx version (Rx data discarded)
  static uint8_t spiTransferTx0(uint8_t bout) { // using Mode 0
-    uint32_t MOSI_PORT_PLUS30 = ((uint32_t) PORT(SD_MOSI_PIN)) + 0x30;  /* SODR of port */
-    uint32_t MOSI_MASK = PIN_MASK(SD_MOSI_PIN);
-    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SD_SCK_PIN)) + 0x30;    /* SODR of port */
-    uint32_t SCK_MASK = PIN_MASK(SD_SCK_PIN);
+    uint32_t MOSI_PORT_PLUS30 = ((uint32_t) PORT(MOSI_PIN)) + 0x30;  /* SODR of port */
+    uint32_t MOSI_MASK = PIN_MASK(MOSI_PIN);
+    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SCK_PIN)) + 0x30;    /* SODR of port */
+    uint32_t SCK_MASK = PIN_MASK(SCK_PIN);
    uint32_t idx = 0;

    /* Negate bout, as the assembler requires a negated value */
@@ -152,9 +154,9 @@
  static uint8_t spiTransferRx0(uint8_t) { // using Mode 0
    uint32_t bin = 0;
    uint32_t work = 0;
-    uint32_t BITBAND_MISO_PORT = BITBAND_ADDRESS( ((uint32_t)PORT(SD_MISO_PIN))+0x3C, PIN_SHIFT(SD_MISO_PIN));  /* PDSR of port in bitband area */
-    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SD_SCK_PIN)) + 0x30;    /* SODR of port */
-    uint32_t SCK_MASK = PIN_MASK(SD_SCK_PIN);
+    uint32_t BITBAND_MISO_PORT = BITBAND_ADDRESS( ((uint32_t)PORT(MISO_PIN))+0x3C, PIN_SHIFT(MISO_PIN));  /* PDSR of port in bitband area */
+    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SCK_PIN)) + 0x30;    /* SODR of port */
+    uint32_t SCK_MASK = PIN_MASK(SCK_PIN);

    /* The software SPI routine */
    __asm__ __volatile__(
@@ -223,36 +225,36 @@
  static uint8_t spiTransfer1(uint8_t b) { // using Mode 0
    int bits = 8;
    do {
-      WRITE(SD_MOSI_PIN, b & 0x80);
+      WRITE(MOSI_PIN, b & 0x80);
      b <<= 1;        // little setup time

-      WRITE(SD_SCK_PIN, HIGH);
+      WRITE(SCK_PIN, HIGH);
      DELAY_NS(125);  // 10 cycles @ 84mhz

-      b |= (READ(SD_MISO_PIN) != 0);
+      b |= (READ(MISO_PIN) != 0);

-      WRITE(SD_SCK_PIN, LOW);
+      WRITE(SCK_PIN, LOW);
      DELAY_NS(125);  // 10 cycles @ 84mhz
    } while (--bits);
    return b;
  }

  // all the others
-  static uint16_t spiDelayNS = 4000; // 4000ns => 125khz
+  static uint32_t spiDelayCyclesX4 = (F_CPU) / 1000000; // 4µs => 125khz

  static uint8_t spiTransferX(uint8_t b) { // using Mode 0
    int bits = 8;
    do {
-      WRITE(SD_MOSI_PIN, b & 0x80);
+      WRITE(MOSI_PIN, b & 0x80);
      b <<= 1; // little setup time

-      WRITE(SD_SCK_PIN, HIGH);
-      DELAY_NS(spiDelayNS);
+      WRITE(SCK_PIN, HIGH);
+      __delay_4cycles(spiDelayCyclesX4);

-      b |= (READ(SD_MISO_PIN) != 0);
+      b |= (READ(MISO_PIN) != 0);

-      WRITE(SD_SCK_PIN, LOW);
-      DELAY_NS(spiDelayNS);
+      WRITE(SCK_PIN, LOW);
+      __delay_4cycles(spiDelayCyclesX4);
    } while (--bits);
    return b;
  }
@@ -268,11 +270,11 @@
  static pfnSpiTransfer spiTransferTx = (pfnSpiTransfer)spiTransferX;

  // Block transfers run at ~8 .. ~10Mhz - Tx version (Rx data discarded)
-  static void spiTxBlock0(const uint8_t *ptr, uint32_t todo) {
-    uint32_t MOSI_PORT_PLUS30 = ((uint32_t) PORT(SD_MOSI_PIN)) + 0x30;  /* SODR of port */
-    uint32_t MOSI_MASK = PIN_MASK(SD_MOSI_PIN);
-    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SD_SCK_PIN)) + 0x30;    /* SODR of port */
-    uint32_t SCK_MASK = PIN_MASK(SD_SCK_PIN);
+  static void spiTxBlock0(const uint8_t* ptr, uint32_t todo) {
+    uint32_t MOSI_PORT_PLUS30 = ((uint32_t) PORT(MOSI_PIN)) + 0x30;  /* SODR of port */
+    uint32_t MOSI_MASK = PIN_MASK(MOSI_PIN);
+    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SCK_PIN)) + 0x30;    /* SODR of port */
+    uint32_t SCK_MASK = PIN_MASK(SCK_PIN);
    uint32_t work = 0;
    uint32_t txval = 0;

@@ -347,12 +349,12 @@
    );
  }

-  static void spiRxBlock0(uint8_t *ptr, uint32_t todo) {
+  static void spiRxBlock0(uint8_t* ptr, uint32_t todo) {
    uint32_t bin = 0;
    uint32_t work = 0;
-    uint32_t BITBAND_MISO_PORT = BITBAND_ADDRESS( ((uint32_t)PORT(SD_MISO_PIN))+0x3C, PIN_SHIFT(SD_MISO_PIN));  /* PDSR of port in bitband area */
-    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SD_SCK_PIN)) + 0x30;    /* SODR of port */
-    uint32_t SCK_MASK = PIN_MASK(SD_SCK_PIN);
+    uint32_t BITBAND_MISO_PORT = BITBAND_ADDRESS( ((uint32_t)PORT(MISO_PIN))+0x3C, PIN_SHIFT(MISO_PIN));  /* PDSR of port in bitband area */
+    uint32_t SCK_PORT_PLUS30 = ((uint32_t) PORT(SCK_PIN)) + 0x30;    /* SODR of port */
+    uint32_t SCK_MASK = PIN_MASK(SCK_PIN);

    /* The software SPI routine */
    __asm__ __volatile__(
@@ -423,48 +425,48 @@
    );
  }

-  static void spiTxBlockX(const uint8_t *buf, uint32_t todo) {
+  static void spiTxBlockX(const uint8_t* buf, uint32_t todo) {
    do {
      (void)spiTransferTx(*buf++);
    } while (--todo);
  }

-  static void spiRxBlockX(uint8_t *buf, uint32_t todo) {
+  static void spiRxBlockX(uint8_t* buf, uint32_t todo) {
    do {
      *buf++ = spiTransferRx(0xFF);
    } while (--todo);
  }

-  // Pointers to generic functions for block transfers
+  // Pointers to generic functions for block tranfers
  static pfnSpiTxBlock spiTxBlock = (pfnSpiTxBlock)spiTxBlockX;
  static pfnSpiRxBlock spiRxBlock = (pfnSpiRxBlock)spiRxBlockX;

  #if MB(ALLIGATOR)
-    #define _SS_WRITE(S) WRITE(SD_SS_PIN, S)
+    #define _SS_WRITE(S) WRITE(SS_PIN, S)
  #else
    #define _SS_WRITE(S) NOOP
  #endif

  void spiBegin() {
-    SET_OUTPUT(SD_SS_PIN);
+    SET_OUTPUT(SS_PIN);
    _SS_WRITE(HIGH);
-    SET_OUTPUT(SD_SCK_PIN);
-    SET_INPUT(SD_MISO_PIN);
-    SET_OUTPUT(SD_MOSI_PIN);
+    SET_OUTPUT(SCK_PIN);
+    SET_INPUT(MISO_PIN);
+    SET_OUTPUT(MOSI_PIN);
  }

  uint8_t spiRec() {
    _SS_WRITE(LOW);
-    WRITE(SD_MOSI_PIN, HIGH); // Output 1s 1
+    WRITE(MOSI_PIN, HIGH); // Output 1s 1
    uint8_t b = spiTransferRx(0xFF);
    _SS_WRITE(HIGH);
    return b;
  }

-  void spiRead(uint8_t *buf, uint16_t nbyte) {
+  void spiRead(uint8_t* buf, uint16_t nbyte) {
    if (nbyte) {
      _SS_WRITE(LOW);
-      WRITE(SD_MOSI_PIN, HIGH); // Output 1s 1
+      WRITE(MOSI_PIN, HIGH); // Output 1s 1
      spiRxBlock(buf, nbyte);
      _SS_WRITE(HIGH);
    }
@@ -476,7 +478,7 @@
    _SS_WRITE(HIGH);
  }

-  void spiSendBlock(uint8_t token, const uint8_t *buf) {
+  void spiSendBlock(uint8_t token, const uint8_t* buf) {
    _SS_WRITE(LOW);
    (void)spiTransferTx(token);
    spiTxBlock(buf, 512);
@@ -508,7 +510,7 @@
        spiRxBlock = (pfnSpiRxBlock)spiRxBlockX;
        break;
      default:
-        spiDelayNS = 4000 >> (6 - spiRate); // spiRate of 2 gives the maximum error with current CPU
+        spiDelayCyclesX4 = ((F_CPU) / 1000000) >> (6 - spiRate);
        spiTransferTx = (pfnSpiTransfer)spiTransferX;
        spiTransferRx = (pfnSpiTransfer)spiTransferX;
        spiTxBlock = (pfnSpiTxBlock)spiTxBlockX;
@@ -517,8 +519,8 @@
    }

    _SS_WRITE(HIGH);
-    WRITE(SD_MOSI_PIN, HIGH);
-    WRITE(SD_SCK_PIN, LOW);
+    WRITE(MOSI_PIN, HIGH);
+    WRITE(SCK_PIN, LOW);
  }

  /** Begin SPI transaction, set clock, bit order, data mode */
@@ -573,34 +575,38 @@

      // Configure SPI pins
      PIO_Configure(
-         g_APinDescription[SD_SCK_PIN].pPort,
-         g_APinDescription[SD_SCK_PIN].ulPinType,
-         g_APinDescription[SD_SCK_PIN].ulPin,
-         g_APinDescription[SD_SCK_PIN].ulPinConfiguration);
+         g_APinDescription[SCK_PIN].pPort,
+         g_APinDescription[SCK_PIN].ulPinType,
+         g_APinDescription[SCK_PIN].ulPin,
+         g_APinDescription[SCK_PIN].ulPinConfiguration);
      PIO_Configure(
-         g_APinDescription[SD_MOSI_PIN].pPort,
-         g_APinDescription[SD_MOSI_PIN].ulPinType,
-         g_APinDescription[SD_MOSI_PIN].ulPin,
-         g_APinDescription[SD_MOSI_PIN].ulPinConfiguration);
+         g_APinDescription[MOSI_PIN].pPort,
+         g_APinDescription[MOSI_PIN].ulPinType,
+         g_APinDescription[MOSI_PIN].ulPin,
+         g_APinDescription[MOSI_PIN].ulPinConfiguration);
      PIO_Configure(
-         g_APinDescription[SD_MISO_PIN].pPort,
-         g_APinDescription[SD_MISO_PIN].ulPinType,
-         g_APinDescription[SD_MISO_PIN].ulPin,
-         g_APinDescription[SD_MISO_PIN].ulPinConfiguration);
+         g_APinDescription[MISO_PIN].pPort,
+         g_APinDescription[MISO_PIN].ulPinType,
+         g_APinDescription[MISO_PIN].ulPin,
+         g_APinDescription[MISO_PIN].ulPinConfiguration);

      // set master mode, peripheral select, fault detection
      SPI_Configure(SPI0, ID_SPI0, SPI_MR_MSTR | SPI_MR_MODFDIS | SPI_MR_PS);
      SPI_Enable(SPI0);

-      SET_OUTPUT(DAC0_SYNC_PIN);
-      #if HAS_MULTI_EXTRUDER
-        OUT_WRITE(DAC1_SYNC_PIN, HIGH);
+      SET_OUTPUT(DAC0_SYNC);
+      #if EXTRUDERS > 1
+        SET_OUTPUT(DAC1_SYNC);
+        WRITE(DAC1_SYNC, HIGH);
      #endif
-      WRITE(DAC0_SYNC_PIN, HIGH);
-      OUT_WRITE(SPI_EEPROM1_CS_PIN, HIGH);
-      OUT_WRITE(SPI_EEPROM2_CS_PIN, HIGH);
-      OUT_WRITE(SPI_FLASH_CS_PIN, HIGH);
-      WRITE(SD_SS_PIN, HIGH);
+      SET_OUTPUT(SPI_EEPROM1_CS);
+      SET_OUTPUT(SPI_EEPROM2_CS);
+      SET_OUTPUT(SPI_FLASH_CS);
+      WRITE(DAC0_SYNC, HIGH);
+      WRITE(SPI_EEPROM1_CS, HIGH);
+      WRITE(SPI_EEPROM2_CS, HIGH);
+      WRITE(SPI_FLASH_CS, HIGH);
+      WRITE(SS_PIN, HIGH);

      OUT_WRITE(SDSS, LOW);

@@ -639,7 +645,7 @@
    }

    // Read from SPI into buffer
-    void spiRead(uint8_t *buf, uint16_t nbyte) {
+    void spiRead(uint8_t* buf, uint16_t nbyte) {
      if (!nbyte) return;
      --nbyte;
      for (int i = 0; i < nbyte; i++) {
@@ -662,7 +668,7 @@
      //DELAY_US(1U);
    }

-    void spiSend(const uint8_t *buf, size_t nbyte) {
+    void spiSend(const uint8_t* buf, size_t nbyte) {
      if (!nbyte) return;
      --nbyte;
      for (size_t i = 0; i < nbyte; i++) {
@@ -683,7 +689,7 @@
      FLUSH_RX();
    }

-    void spiSend(uint32_t chan, const uint8_t *buf, size_t nbyte) {
+    void spiSend(uint32_t chan, const uint8_t* buf, size_t nbyte) {
      if (!nbyte) return;
      --nbyte;
      for (size_t i = 0; i < nbyte; i++) {
@@ -696,7 +702,7 @@
    }

    // Write from buffer to SPI
-    void spiSendBlock(uint8_t token, const uint8_t *buf) {
+    void spiSendBlock(uint8_t token, const uint8_t* buf) {
      SPI0->SPI_TDR = (uint32_t)token | SPI_PCS(SPI_CHAN);
      WHILE_TX(0);
      //WHILE_RX(0);
@@ -753,6 +759,7 @@
     *
     *  All of the above can be avoided by defining FORCE_SOFT_SPI to force the
     *  display to use software SPI.
+     *
     */

    void spiInit(uint8_t spiRate=6) {  // Default to slowest rate if not specified)
@@ -795,19 +802,19 @@

    uint8_t spiRec() { return (uint8_t)spiTransfer(0xFF); }

-    void spiRead(uint8_t *buf, uint16_t nbyte) {
+    void spiRead(uint8_t* buf, uint16_t nbyte) {
      for (int i = 0; i < nbyte; i++)
        buf[i] = spiTransfer(0xFF);
    }

    void spiSend(uint8_t data) { spiTransfer(data); }

-    void spiSend(const uint8_t *buf, size_t nbyte) {
+    void spiSend(const uint8_t* buf, size_t nbyte) {
      for (uint16_t i = 0; i < nbyte; i++)
        spiTransfer(buf[i]);
    }

-    void spiSendBlock(uint8_t token, const uint8_t *buf) {
+    void spiSendBlock(uint8_t token, const uint8_t* buf) {
      spiTransfer(token);
      for (uint16_t i = 0; i < 512; i++)
        spiTransfer(buf[i]);
--- a/Marlin/src/HAL/HAL_DUE/InterruptVectors.cpp
+++ b/Marlin/src/HAL/HAL_DUE/InterruptVectors.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -63,13 +63,13 @@ static pfnISR_Handler* get_relocated_table_addr() {
  memcpy(&ram_tab, romtab, sizeof(ram_tab));

  // Disable global interrupts
-  CRITICAL_SECTION_START();
+  CRITICAL_SECTION_START;

  // Set the vector table base address to the SRAM copy
  SCB->VTOR = (uint32_t)(&ram_tab);

  // Reenable interrupts
-  CRITICAL_SECTION_END();
+  CRITICAL_SECTION_END;

  // Return the address of the table
  return (pfnISR_Handler*)(&ram_tab);
@@ -80,7 +80,7 @@ pfnISR_Handler install_isr(IRQn_Type irq, pfnISR_Handler newHandler) {
  pfnISR_Handler *isrtab = get_relocated_table_addr();

  // Disable global interrupts
-  CRITICAL_SECTION_START();
+  CRITICAL_SECTION_START;

  // Get the original handler
  pfnISR_Handler oldHandler = isrtab[irq + 16];
@@ -89,7 +89,7 @@ pfnISR_Handler install_isr(IRQn_Type irq, pfnISR_Handler newHandler) {
  isrtab[irq + 16] = newHandler;

  // Reenable interrupts
-  CRITICAL_SECTION_END();
+  CRITICAL_SECTION_END;

  // Return the original one
  return oldHandler;
--- a/Marlin/src/HAL/HAL_DUE/InterruptVectors.h
+++ b/Marlin/src/HAL/HAL_DUE/InterruptVectors.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_DUE/MarlinSerial.cpp
+++ b/Marlin/src/HAL/HAL_DUE/MarlinSerial.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -45,7 +45,7 @@ template<typename Cfg> typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSeria
 // A SW memory barrier, to ensure GCC does not overoptimize loops
 #define sw_barrier() asm volatile("": : :"memory");

-#include "../../feature/e_parser.h"
+#include "../../feature/emergency_parser.h"

 // (called with RX interrupts disabled)
 template<typename Cfg>
@@ -382,7 +382,7 @@ void MarlinSerial<Cfg>::flush() {
 }

 template<typename Cfg>
-size_t MarlinSerial<Cfg>::write(const uint8_t c) {
+void MarlinSerial<Cfg>::write(const uint8_t c) {
  _written = true;

  if (Cfg::TX_SIZE == 0) {
@@ -400,13 +400,13 @@ size_t MarlinSerial<Cfg>::write(const uint8_t c) {
    // XOFF char at the RX isr, but it is properly handled there
    if (!(HWUART->UART_IMR & UART_IMR_TXRDY) && (HWUART->UART_SR & UART_SR_TXRDY)) {
      HWUART->UART_THR = c;
-      return 1;
+      return;
    }

    const uint8_t i = (tx_buffer.head + 1) & (Cfg::TX_SIZE - 1);

    // If global interrupts are disabled (as the result of being called from an ISR)...
-    if (!hal.isr_state()) {
+    if (!ISRS_ENABLED()) {

      // Make room by polling if it is possible to transmit, and do so!
      while (i == tx_buffer.tail) {
@@ -428,7 +428,6 @@ size_t MarlinSerial<Cfg>::write(const uint8_t c) {
    // Enable TX isr - Non atomic, but it will eventually enable TX isr
    HWUART->UART_IER = UART_IER_TXRDY;
  }
-  return 1;
 }

 template<typename Cfg>
@@ -454,7 +453,7 @@ void MarlinSerial<Cfg>::flushTX() {
    if (!_written) return;

    // If global interrupts are disabled (as the result of being called from an ISR)...
-    if (!hal.isr_state()) {
+    if (!ISRS_ENABLED()) {

      // Wait until everything was transmitted - We must do polling, as interrupts are disabled
      while (tx_buffer.head != tx_buffer.tail || !(HWUART->UART_SR & UART_SR_TXEMPTY)) {
@@ -474,21 +473,179 @@ void MarlinSerial<Cfg>::flushTX() {
  }
 }

+/**
+ * Imports from print.h
+ */
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::print(char c, int base) {
+  print((long)c, base);
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::print(unsigned char b, int base) {
+  print((unsigned long)b, base);
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::print(int n, int base) {
+  print((long)n, base);
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::print(unsigned int n, int base) {
+  print((unsigned long)n, base);
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::print(long n, int base) {
+  if (base == 0) write(n);
+  else if (base == 10) {
+    if (n < 0) { print('-'); n = -n; }
+    printNumber(n, 10);
+  }
+  else
+    printNumber(n, base);
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::print(unsigned long n, int base) {
+  if (base == 0) write(n);
+  else printNumber(n, base);
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::print(double n, int digits) {
+  printFloat(n, digits);
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::println() {
+  print('\r');
+  print('\n');
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::println(const String& s) {
+  print(s);
+  println();
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::println(const char c[]) {
+  print(c);
+  println();
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::println(char c, int base) {
+  print(c, base);
+  println();
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::println(unsigned char b, int base) {
+  print(b, base);
+  println();
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::println(int n, int base) {
+  print(n, base);
+  println();
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::println(unsigned int n, int base) {
+  print(n, base);
+  println();
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::println(long n, int base) {
+  print(n, base);
+  println();
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::println(unsigned long n, int base) {
+  print(n, base);
+  println();
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::println(double n, int digits) {
+  print(n, digits);
+  println();
+}
+
+// Private Methods
+template<typename Cfg>
+void MarlinSerial<Cfg>::printNumber(unsigned long n, uint8_t base) {
+  if (n) {
+    unsigned char buf[8 * sizeof(long)]; // Enough space for base 2
+    int8_t i = 0;
+    while (n) {
+      buf[i++] = n % base;
+      n /= base;
+    }
+    while (i--)
+      print((char)(buf[i] + (buf[i] < 10 ? '0' : 'A' - 10)));
+  }
+  else
+    print('0');
+}
+
+template<typename Cfg>
+void MarlinSerial<Cfg>::printFloat(double number, uint8_t digits) {
+  // Handle negative numbers
+  if (number < 0.0) {
+    print('-');
+    number = -number;
+  }
+
+  // Round correctly so that print(1.999, 2) prints as "2.00"
+  double rounding = 0.5;
+  for (uint8_t i = 0; i < digits; ++i) rounding *= 0.1;
+  number += rounding;
+
+  // Extract the integer part of the number and print it
+  unsigned long int_part = (unsigned long)number;
+  double remainder = number - (double)int_part;
+  print(int_part);
+
+  // Print the decimal point, but only if there are digits beyond
+  if (digits) {
+    print('.');
+    // Extract digits from the remainder one at a time
+    while (digits--) {
+      remainder *= 10.0;
+      int toPrint = int(remainder);
+      print(toPrint);
+      remainder -= toPrint;
+    }
+  }
+}

 // If not using the USB port as serial port
-#if defined(SERIAL_PORT) && SERIAL_PORT >= 0
-  template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT> >;
-  MSerialT1 customizedSerial1(MarlinSerialCfg<SERIAL_PORT>::EMERGENCYPARSER);
+#if SERIAL_PORT >= 0
+
+  // Preinstantiate
+  template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>;
+
+  // Instantiate
+  MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
+
 #endif

-#if defined(SERIAL_PORT_2) && SERIAL_PORT_2 >= 0
-  template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT_2> >;
-  MSerialT2 customizedSerial2(MarlinSerialCfg<SERIAL_PORT_2>::EMERGENCYPARSER);
-#endif
+#ifdef SERIAL_PORT_2
+
+  // Preinstantiate
+  template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>;
+
+  // Instantiate
+  MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2;

-#if defined(SERIAL_PORT_3) && SERIAL_PORT_3 >= 0
-  template class MarlinSerial< MarlinSerialCfg<SERIAL_PORT_3> >;
-  MSerialT3 customizedSerial3(MarlinSerialCfg<SERIAL_PORT_3>::EMERGENCYPARSER);
 #endif

 #endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/HAL_DUE/MarlinSerial.h
+++ b/Marlin/src/HAL/HAL_DUE/MarlinSerial.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -27,10 +27,14 @@
 * Based on MarlinSerial for AVR, copyright (c) 2006 Nicholas Zambetti.  All right reserved.
 */

+#include "../shared/MarlinSerial.h"
+
 #include <WString.h>

-#include "../../inc/MarlinConfigPre.h"
-#include "../../core/serial_hook.h"
+#define DEC 10
+#define HEX 16
+#define OCT 8
+#define BIN 2

 // Define constants and variables for buffering incoming serial data.  We're
 // using a ring buffer (I think), in which rx_buffer_head is the index of the
@@ -115,15 +119,42 @@ public:
  static int read();
  static void flush();
  static ring_buffer_pos_t available();
-  static size_t write(const uint8_t c);
+  static void write(const uint8_t c);
  static void flushTX();

-  static bool emergency_parser_enabled() { return Cfg::EMERGENCYPARSER; }
-
  FORCE_INLINE static uint8_t dropped() { return Cfg::DROPPED_RX ? rx_dropped_bytes : 0; }
  FORCE_INLINE static uint8_t buffer_overruns() { return Cfg::RX_OVERRUNS ? rx_buffer_overruns : 0; }
  FORCE_INLINE static uint8_t framing_errors() { return Cfg::RX_FRAMING_ERRORS ? rx_framing_errors : 0; }
  FORCE_INLINE static ring_buffer_pos_t rxMaxEnqueued() { return Cfg::MAX_RX_QUEUED ? rx_max_enqueued : 0; }
+
+  FORCE_INLINE static void write(const char* str) { while (*str) write(*str++); }
+  FORCE_INLINE static void write(const uint8_t* buffer, size_t size) { while (size--) write(*buffer++); }
+  FORCE_INLINE static void print(const String& s) { for (int i = 0; i < (int)s.length(); i++) write(s[i]); }
+  FORCE_INLINE static void print(const char* str) { write(str); }
+
+  static void print(char, int = 0);
+  static void print(unsigned char, int = 0);
+  static void print(int, int = DEC);
+  static void print(unsigned int, int = DEC);
+  static void print(long, int = DEC);
+  static void print(unsigned long, int = DEC);
+  static void print(double, int = 2);
+
+  static void println(const String& s);
+  static void println(const char[]);
+  static void println(char, int = 0);
+  static void println(unsigned char, int = 0);
+  static void println(int, int = DEC);
+  static void println(unsigned int, int = DEC);
+  static void println(long, int = DEC);
+  static void println(unsigned long, int = DEC);
+  static void println(double, int = 2);
+  static void println();
+  operator bool() { return true; }
+
+private:
+  static void printNumber(unsigned long, const uint8_t);
+  static void printFloat(double, uint8_t);
 };

 // Serial port configuration
@@ -132,25 +163,22 @@ struct MarlinSerialCfg {
  static constexpr int PORT               = serial;
  static constexpr unsigned int RX_SIZE   = RX_BUFFER_SIZE;
  static constexpr unsigned int TX_SIZE   = TX_BUFFER_SIZE;
-  static constexpr bool XONOFF            = ENABLED(SERIAL_XON_XOFF);
-  static constexpr bool EMERGENCYPARSER   = ENABLED(EMERGENCY_PARSER);
-  static constexpr bool DROPPED_RX        = ENABLED(SERIAL_STATS_DROPPED_RX);
-  static constexpr bool RX_OVERRUNS       = ENABLED(SERIAL_STATS_RX_BUFFER_OVERRUNS);
-  static constexpr bool RX_FRAMING_ERRORS = ENABLED(SERIAL_STATS_RX_FRAMING_ERRORS);
-  static constexpr bool MAX_RX_QUEUED     = ENABLED(SERIAL_STATS_MAX_RX_QUEUED);
+  static constexpr bool XONOFF            = bSERIAL_XON_XOFF;
+  static constexpr bool EMERGENCYPARSER   = bEMERGENCY_PARSER;
+  static constexpr bool DROPPED_RX        = bSERIAL_STATS_DROPPED_RX;
+  static constexpr bool RX_OVERRUNS       = bSERIAL_STATS_RX_BUFFER_OVERRUNS;
+  static constexpr bool RX_FRAMING_ERRORS = bSERIAL_STATS_RX_FRAMING_ERRORS;
+  static constexpr bool MAX_RX_QUEUED     = bSERIAL_STATS_MAX_RX_QUEUED;
 };

-#if defined(SERIAL_PORT) && SERIAL_PORT >= 0
-  typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT> > > MSerialT1;
-  extern MSerialT1 customizedSerial1;
-#endif
+#if SERIAL_PORT >= 0

-#if defined(SERIAL_PORT_2) && SERIAL_PORT_2 >= 0
-  typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT_2> > > MSerialT2;
-  extern MSerialT2 customizedSerial2;
-#endif
+  extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
+
+#endif // SERIAL_PORT >= 0
+
+#ifdef SERIAL_PORT_2
+
+  extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2;

-#if defined(SERIAL_PORT_3) && SERIAL_PORT_3 >= 0
-  typedef Serial1Class< MarlinSerial< MarlinSerialCfg<SERIAL_PORT_3> > > MSerialT3;
-  extern MSerialT3 customizedSerial3;
 #endif
--- a/Marlin/src/HAL/HAL_DUE/MarlinSerialUSB.cpp
+++ b/Marlin/src/HAL/HAL_DUE/MarlinSerialUSB.cpp
@@ -0,0 +1,290 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * MarlinSerial_Due.cpp - Hardware serial library for Arduino DUE
+ * Copyright (c) 2017 Eduardo José Tagle. All right reserved
+ * Based on MarlinSerial for AVR, copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+ */
+#ifdef ARDUINO_ARCH_SAM
+
+#include "../../inc/MarlinConfig.h"
+
+#if SERIAL_PORT == -1
+
+#include "MarlinSerialUSB.h"
+
+#if ENABLED(EMERGENCY_PARSER)
+  #include "../../feature/emergency_parser.h"
+#endif
+
+// Imports from Atmel USB Stack/CDC implementation
+extern "C" {
+  bool usb_task_cdc_isenabled();
+  bool usb_task_cdc_dtr_active();
+  bool udi_cdc_is_rx_ready();
+  int udi_cdc_getc();
+  bool udi_cdc_is_tx_ready();
+  int udi_cdc_putc(int value);
+};
+
+// Pending character
+static int pending_char = -1;
+
+#if ENABLED(EMERGENCY_PARSER)
+  static EmergencyParser::State emergency_state; // = EP_RESET
+#endif
+
+// Public Methods
+void MarlinSerialUSB::begin(const long) {}
+
+void MarlinSerialUSB::end() {}
+
+int MarlinSerialUSB::peek() {
+  if (pending_char >= 0)
+    return pending_char;
+
+  // If USB CDC not enumerated or not configured on the PC side
+  if (!usb_task_cdc_isenabled())
+    return -1;
+
+  // If no bytes sent from the PC
+  if (!udi_cdc_is_rx_ready())
+    return -1;
+
+  pending_char = udi_cdc_getc();
+
+  #if ENABLED(EMERGENCY_PARSER)
+    emergency_parser.update(emergency_state, (char)pending_char);
+  #endif
+
+  return pending_char;
+}
+
+int MarlinSerialUSB::read() {
+  if (pending_char >= 0) {
+    int ret = pending_char;
+    pending_char = -1;
+    return ret;
+  }
+
+  // If USB CDC not enumerated or not configured on the PC side
+  if (!usb_task_cdc_isenabled())
+    return -1;
+
+  // If no bytes sent from the PC
+  if (!udi_cdc_is_rx_ready())
+    return -1;
+
+  int c = udi_cdc_getc();
+
+  #if ENABLED(EMERGENCY_PARSER)
+    emergency_parser.update(emergency_state, (char)c);
+  #endif
+
+  return c;
+}
+
+bool MarlinSerialUSB::available() {
+    /* If Pending chars */
+  return pending_char >= 0 ||
+    /* or USB CDC enumerated and configured on the PC side and some
+       bytes where sent to us */
+      (usb_task_cdc_isenabled() && udi_cdc_is_rx_ready());
+}
+
+void MarlinSerialUSB::flush() { }
+void MarlinSerialUSB::flushTX() { }
+
+void MarlinSerialUSB::write(const uint8_t c) {
+
+  /* Do not even bother sending anything if USB CDC is not enumerated
+     or not configured on the PC side or there is no program on the PC
+     listening to our messages */
+  if (!usb_task_cdc_isenabled() || !usb_task_cdc_dtr_active())
+    return;
+
+  /* Wait until the PC has read the pending to be sent data */
+  while (usb_task_cdc_isenabled() &&
+         usb_task_cdc_dtr_active() &&
+        !udi_cdc_is_tx_ready()) {
+  };
+
+  /* Do not even bother sending anything if USB CDC is not enumerated
+     or not configured on the PC side or there is no program on the PC
+     listening to our messages at this point */
+  if (!usb_task_cdc_isenabled() || !usb_task_cdc_dtr_active())
+    return;
+
+  // Fifo full
+  //  udi_cdc_signal_overrun();
+  udi_cdc_putc(c);
+}
+
+/**
+ * Imports from print.h
+ */
+
+void MarlinSerialUSB::print(char c, int base) {
+  print((long)c, base);
+}
+
+void MarlinSerialUSB::print(unsigned char b, int base) {
+  print((unsigned long)b, base);
+}
+
+void MarlinSerialUSB::print(int n, int base) {
+  print((long)n, base);
+}
+
+void MarlinSerialUSB::print(unsigned int n, int base) {
+  print((unsigned long)n, base);
+}
+
+void MarlinSerialUSB::print(long n, int base) {
+  if (base == 0)
+    write(n);
+  else if (base == 10) {
+    if (n < 0) {
+      print('-');
+      n = -n;
+    }
+    printNumber(n, 10);
+  }
+  else
+    printNumber(n, base);
+}
+
+void MarlinSerialUSB::print(unsigned long n, int base) {
+  if (base == 0) write(n);
+  else printNumber(n, base);
+}
+
+void MarlinSerialUSB::print(double n, int digits) {
+  printFloat(n, digits);
+}
+
+void MarlinSerialUSB::println() {
+  print('\r');
+  print('\n');
+}
+
+void MarlinSerialUSB::println(const String& s) {
+  print(s);
+  println();
+}
+
+void MarlinSerialUSB::println(const char c[]) {
+  print(c);
+  println();
+}
+
+void MarlinSerialUSB::println(char c, int base) {
+  print(c, base);
+  println();
+}
+
+void MarlinSerialUSB::println(unsigned char b, int base) {
+  print(b, base);
+  println();
+}
+
+void MarlinSerialUSB::println(int n, int base) {
+  print(n, base);
+  println();
+}
+
+void MarlinSerialUSB::println(unsigned int n, int base) {
+  print(n, base);
+  println();
+}
+
+void MarlinSerialUSB::println(long n, int base) {
+  print(n, base);
+  println();
+}
+
+void MarlinSerialUSB::println(unsigned long n, int base) {
+  print(n, base);
+  println();
+}
+
+void MarlinSerialUSB::println(double n, int digits) {
+  print(n, digits);
+  println();
+}
+
+// Private Methods
+
+void MarlinSerialUSB::printNumber(unsigned long n, uint8_t base) {
+  if (n) {
+    unsigned char buf[8 * sizeof(long)]; // Enough space for base 2
+    int8_t i = 0;
+    while (n) {
+      buf[i++] = n % base;
+      n /= base;
+    }
+    while (i--)
+      print((char)(buf[i] + (buf[i] < 10 ? '0' : 'A' - 10)));
+  }
+  else
+    print('0');
+}
+
+void MarlinSerialUSB::printFloat(double number, uint8_t digits) {
+  // Handle negative numbers
+  if (number < 0.0) {
+    print('-');
+    number = -number;
+  }
+
+  // Round correctly so that print(1.999, 2) prints as "2.00"
+  double rounding = 0.5;
+  for (uint8_t i = 0; i < digits; ++i)
+    rounding *= 0.1;
+
+  number += rounding;
+
+  // Extract the integer part of the number and print it
+  unsigned long int_part = (unsigned long)number;
+  double remainder = number - (double)int_part;
+  print(int_part);
+
+  // Print the decimal point, but only if there are digits beyond
+  if (digits) {
+    print('.');
+    // Extract digits from the remainder one at a time
+    while (digits--) {
+      remainder *= 10.0;
+      int toPrint = int(remainder);
+      print(toPrint);
+      remainder -= toPrint;
+    }
+  }
+}
+
+// Preinstantiate
+MarlinSerialUSB customizedSerial1;
+
+#endif // SERIAL_PORT == -1
+
+#endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/HAL_DUE/MarlinSerialUSB.h
+++ b/Marlin/src/HAL/HAL_DUE/MarlinSerialUSB.h
@@ -0,0 +1,93 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * MarlinSerialUSB_Due.h - Hardware Serial over USB (CDC) library for Arduino DUE
+ * Copyright (c) 2017 Eduardo José Tagle. All right reserved
+ */
+
+#include "../../inc/MarlinConfig.h"
+
+#if SERIAL_PORT == -1
+
+#include <WString.h>
+
+#define DEC 10
+#define HEX 16
+#define OCT 8
+#define BIN 2
+
+class MarlinSerialUSB {
+
+public:
+  MarlinSerialUSB() {};
+  static void begin(const long);
+  static void end();
+  static int peek();
+  static int read();
+  static void flush();
+  static void flushTX();
+  static bool available();
+  static void write(const uint8_t c);
+
+  #if ENABLED(SERIAL_STATS_DROPPED_RX)
+    FORCE_INLINE static uint32_t dropped() { return 0; }
+  #endif
+
+  #if ENABLED(SERIAL_STATS_MAX_RX_QUEUED)
+    FORCE_INLINE static int rxMaxEnqueued() { return 0; }
+  #endif
+
+  FORCE_INLINE static void write(const char* str) { while (*str) write(*str++); }
+  FORCE_INLINE static void write(const uint8_t* buffer, size_t size) { while (size--) write(*buffer++); }
+  FORCE_INLINE static void print(const String& s) { for (int i = 0; i < (int)s.length(); i++) write(s[i]); }
+  FORCE_INLINE static void print(const char* str) { write(str); }
+
+  static void print(char, int = 0);
+  static void print(unsigned char, int = 0);
+  static void print(int, int = DEC);
+  static void print(unsigned int, int = DEC);
+  static void print(long, int = DEC);
+  static void print(unsigned long, int = DEC);
+  static void print(double, int = 2);
+
+  static void println(const String& s);
+  static void println(const char[]);
+  static void println(char, int = 0);
+  static void println(unsigned char, int = 0);
+  static void println(int, int = DEC);
+  static void println(unsigned int, int = DEC);
+  static void println(long, int = DEC);
+  static void println(unsigned long, int = DEC);
+  static void println(double, int = 2);
+  static void println();
+  operator bool() { return true; }
+
+private:
+  static void printNumber(unsigned long, const uint8_t);
+  static void printFloat(double, uint8_t);
+};
+
+extern MarlinSerialUSB customizedSerial1;
+
+#endif // SERIAL_PORT == -1
--- a/Marlin/src/HAL/HAL_DUE/Servo.cpp
+++ b/Marlin/src/HAL/HAL_DUE/Servo.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -44,6 +44,7 @@

 #if HAS_SERVOS

+#include "../shared/Marduino.h"
 #include "../shared/servo.h"
 #include "../shared/servo_private.h"

--- a/Marlin/src/HAL/HAL_DUE/ServoTimers.h
+++ b/Marlin/src/HAL/HAL_DUE/ServoTimers.h
--- a/Marlin/src/HAL/HAL_DUE/Tone.cpp
+++ b/Marlin/src/HAL/HAL_DUE/Tone.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -18,37 +18,38 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

 /**
 * Description: Tone function for Arduino Due and compatible (SAM3X8E)
- * Derived from https://forum.arduino.cc/index.php?topic=136500.msg2903012#msg2903012
+ * Derived from http://forum.arduino.cc/index.php?topic=136500.msg2903012#msg2903012
 */

 #ifdef ARDUINO_ARCH_SAM

 #include "../../inc/MarlinConfig.h"
 #include "HAL.h"
+#include "timers.h"

 static pin_t tone_pin;
 volatile static int32_t toggles;

-void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration/*=0*/) {
+void tone(const pin_t _pin, const unsigned int frequency, const unsigned long duration) {
  tone_pin = _pin;
  toggles = 2 * frequency * duration / 1000;
-  HAL_timer_start(MF_TIMER_TONE, 2 * frequency);
+  HAL_timer_start(TONE_TIMER_NUM, 2 * frequency);
 }

 void noTone(const pin_t _pin) {
-  HAL_timer_disable_interrupt(MF_TIMER_TONE);
+  HAL_timer_disable_interrupt(TONE_TIMER_NUM);
  extDigitalWrite(_pin, LOW);
 }

 HAL_TONE_TIMER_ISR() {
  static uint8_t pin_state = 0;
-  HAL_timer_isr_prologue(MF_TIMER_TONE);
+  HAL_timer_isr_prologue(TONE_TIMER_NUM);

  if (toggles) {
    toggles--;
--- a/Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_shared_hw_spi.cpp
+++ b/Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_shared_hw_spi.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,10 +16,11 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

+
 /**
 * Based on u8g_com_msp430_hw_spi.c
 *
@@ -51,23 +52,25 @@
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
 */

 #ifdef __SAM3X8E__

 #include "../../../inc/MarlinConfigPre.h"

-#if HAS_MARLINUI_U8GLIB
+#if HAS_GRAPHICAL_LCD

-#include <U8glib-HAL.h>
+#include <U8glib.h>

 #include "../../../MarlinCore.h"

-#ifndef LCD_SPI_SPEED
-  #define LCD_SPI_SPEED SPI_QUARTER_SPEED
-#endif
+void spiBegin();
+void spiInit(uint8_t spiRate);
+void spiSend(uint8_t b);
+void spiSend(const uint8_t* buf, size_t n);

-#include "../../shared/HAL_SPI.h"
+#include "../../shared/Marduino.h"
 #include "../fastio.h"

 void u8g_SetPIOutput_DUE_hw_spi(u8g_t *u8g, uint8_t pin_index) {
@@ -98,7 +101,11 @@ uint8_t u8g_com_HAL_DUE_shared_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_va

      spiBegin();

-      spiInit(LCD_SPI_SPEED);
+      #ifndef SPI_SPEED
+        #define SPI_SPEED SPI_FULL_SPEED  // use same SPI speed as SD card
+      #endif
+      spiInit(2);
+
      break;

    case U8G_COM_MSG_ADDRESS:                     /* define cmd (arg_val = 0) or data mode (arg_val = 1) */
@@ -138,6 +145,6 @@ uint8_t u8g_com_HAL_DUE_shared_hw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_va
  return 1;
 }

-#endif // HAS_MARLINUI_U8GLIB
+#endif // HAS_GRAPHICAL_LCD

-#endif // __SAM3X8E__
+#endif //__SAM3X8E__
--- a/Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_st7920_sw_spi.cpp
+++ b/Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_st7920_sw_spi.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -57,12 +57,11 @@

 #include "../../../inc/MarlinConfigPre.h"

-#if IS_U8GLIB_ST7920
+#if ENABLED(U8GLIB_ST7920)

-#include "../../../inc/MarlinConfig.h"
 #include "../../shared/Delay.h"

-#include <U8glib-HAL.h>
+#include <U8glib.h>

 #include "u8g_com_HAL_DUE_sw_spi_shared.h"

@@ -146,7 +145,7 @@ uint8_t u8g_com_HAL_DUE_ST7920_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_va
 }

 #if ENABLED(LIGHTWEIGHT_UI)
-  #include "../../../lcd/marlinui.h"
+  #include "../../../lcd/ultralcd.h"
  #include "../../shared/HAL_ST7920.h"

  #define ST7920_CS_PIN LCD_PINS_RS
@@ -182,5 +181,5 @@ uint8_t u8g_com_HAL_DUE_ST7920_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_va
  }
 #endif // LIGHTWEIGHT_UI

-#endif // IS_U8GLIB_ST7920
+#endif // U8GLIB_ST7920
 #endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_sw_spi.cpp
+++ b/Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_sw_spi.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -57,14 +57,17 @@

 #include "../../../inc/MarlinConfigPre.h"

-#if HAS_MARLINUI_U8GLIB && !IS_U8GLIB_ST7920
+#if HAS_GRAPHICAL_LCD && DISABLED(U8GLIB_ST7920)
+
+#undef SPI_SPEED
+#define SPI_SPEED 2  // About 2 MHz

 #include "u8g_com_HAL_DUE_sw_spi_shared.h"

 #include "../../shared/Marduino.h"
 #include "../../shared/Delay.h"

-#include <U8glib-HAL.h>
+#include <U8glib.h>

 #if ENABLED(FYSETC_MINI_12864)
  #define SPISEND_SW_DUE u8g_spiSend_sw_DUE_mode_3
@@ -141,5 +144,5 @@ uint8_t u8g_com_HAL_DUE_sw_spi_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void
  return 1;
 }

-#endif // HAS_MARLINUI_U8GLIB && !IS_U8GLIB_ST7920
+#endif // HAS_GRAPHICAL_LCD && !U8GLIB_ST7920
 #endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_sw_spi_shared.cpp
+++ b/Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_sw_spi_shared.cpp
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

@@ -57,12 +57,11 @@

 #include "../../../inc/MarlinConfigPre.h"

-#if HAS_MARLINUI_U8GLIB
+#if HAS_GRAPHICAL_LCD

-#include "../../../inc/MarlinConfig.h"
 #include "../../shared/Delay.h"

-#include <U8glib-HAL.h>
+#include <U8glib.h>

 #include "u8g_com_HAL_DUE_sw_spi_shared.h"

@@ -81,7 +80,7 @@ Pio *SCK_pPio, *MOSI_pPio;
 uint32_t SCK_dwMask, MOSI_dwMask;

 void u8g_spiSend_sw_DUE_mode_0(uint8_t val) { // 3MHz
-  LOOP_L_N(i, 8) {
+  for (uint8_t i = 0; i < 8; i++) {
    if (val & 0x80)
      MOSI_pPio->PIO_SODR = MOSI_dwMask;
    else
@@ -95,7 +94,7 @@ void u8g_spiSend_sw_DUE_mode_0(uint8_t val) { // 3MHz
 }

 void u8g_spiSend_sw_DUE_mode_3(uint8_t val) { // 3.5MHz
-  LOOP_L_N(i, 8) {
+  for (uint8_t i = 0; i < 8; i++) {
    SCK_pPio->PIO_CODR = SCK_dwMask;
    DELAY_NS(50);
    if (val & 0x80)
@@ -109,5 +108,5 @@ void u8g_spiSend_sw_DUE_mode_3(uint8_t val) { // 3.5MHz
  }
 }

-#endif // HAS_MARLINUI_U8GLIB
+#endif // HAS_GRAPHICAL_LCD
 #endif // ARDUINO_ARCH_SAM
--- a/Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_sw_spi_shared.h
+++ b/Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_sw_spi_shared.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,14 +16,14 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once

 #include "../../../inc/MarlinConfigPre.h"
 #include "../../shared/Marduino.h"
-#include <U8glib-HAL.h>
+#include <U8glib.h>

 void u8g_SetPIOutput_DUE(u8g_t *u8g, uint8_t pin_index);
 void u8g_SetPILevel_DUE(u8g_t *u8g, uint8_t pin_index, uint8_t level);
--- a/Marlin/src/HAL/HAL_DUE/endstop_interrupts.h
+++ b/Marlin/src/HAL/HAL_DUE/endstop_interrupts.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -47,33 +47,43 @@ void endstop_ISR() { endstops.update(); }

 void setup_endstop_interrupts() {
  #define _ATTACH(P) attachInterrupt(digitalPinToInterrupt(P), endstop_ISR, CHANGE)
-  TERN_(HAS_X_MAX, _ATTACH(X_MAX_PIN));
-  TERN_(HAS_X_MIN, _ATTACH(X_MIN_PIN));
-  TERN_(HAS_Y_MAX, _ATTACH(Y_MAX_PIN));
-  TERN_(HAS_Y_MIN, _ATTACH(Y_MIN_PIN));
-  TERN_(HAS_Z_MAX, _ATTACH(Z_MAX_PIN));
-  TERN_(HAS_Z_MIN, _ATTACH(Z_MIN_PIN));
-  TERN_(HAS_X2_MAX, _ATTACH(X2_MAX_PIN));
-  TERN_(HAS_X2_MIN, _ATTACH(X2_MIN_PIN));
-  TERN_(HAS_Y2_MAX, _ATTACH(Y2_MAX_PIN));
-  TERN_(HAS_Y2_MIN, _ATTACH(Y2_MIN_PIN));
-  TERN_(HAS_Z2_MAX, _ATTACH(Z2_MAX_PIN));
-  TERN_(HAS_Z2_MIN, _ATTACH(Z2_MIN_PIN));
-  TERN_(HAS_Z3_MAX, _ATTACH(Z3_MAX_PIN));
-  TERN_(HAS_Z3_MIN, _ATTACH(Z3_MIN_PIN));
-  TERN_(HAS_Z4_MAX, _ATTACH(Z4_MAX_PIN));
-  TERN_(HAS_Z4_MIN, _ATTACH(Z4_MIN_PIN));
-  TERN_(HAS_Z_MIN_PROBE_PIN, _ATTACH(Z_MIN_PROBE_PIN));
-  TERN_(HAS_I_MAX, _ATTACH(I_MAX_PIN));
-  TERN_(HAS_I_MIN, _ATTACH(I_MIN_PIN));
-  TERN_(HAS_J_MAX, _ATTACH(J_MAX_PIN));
-  TERN_(HAS_J_MIN, _ATTACH(J_MIN_PIN));
-  TERN_(HAS_K_MAX, _ATTACH(K_MAX_PIN));
-  TERN_(HAS_K_MIN, _ATTACH(K_MIN_PIN));
-  TERN_(HAS_U_MAX, _ATTACH(U_MAX_PIN));
-  TERN_(HAS_U_MIN, _ATTACH(U_MIN_PIN));
-  TERN_(HAS_V_MAX, _ATTACH(V_MAX_PIN));
-  TERN_(HAS_V_MIN, _ATTACH(V_MIN_PIN));
-  TERN_(HAS_W_MAX, _ATTACH(W_MAX_PIN));
-  TERN_(HAS_W_MIN, _ATTACH(W_MIN_PIN));
+  #if HAS_X_MAX
+    _ATTACH(X_MAX_PIN);
+  #endif
+  #if HAS_X_MIN
+    _ATTACH(X_MIN_PIN);
+  #endif
+  #if HAS_Y_MAX
+    _ATTACH(Y_MAX_PIN);
+  #endif
+  #if HAS_Y_MIN
+    _ATTACH(Y_MIN_PIN);
+  #endif
+  #if HAS_Z_MAX
+    _ATTACH(Z_MAX_PIN);
+  #endif
+  #if HAS_Z_MIN
+     _ATTACH(Z_MIN_PIN);
+  #endif
+  #if HAS_Z2_MAX
+    _ATTACH(Z2_MAX_PIN);
+  #endif
+  #if HAS_Z2_MIN
+    _ATTACH(Z2_MIN_PIN);
+  #endif
+  #if HAS_Z3_MAX
+    _ATTACH(Z3_MAX_PIN);
+  #endif
+  #if HAS_Z3_MIN
+    _ATTACH(Z3_MIN_PIN);
+  #endif
+  #if HAS_Z4_MAX
+    _ATTACH(Z4_MAX_PIN);
+  #endif
+  #if HAS_Z4_MIN
+    _ATTACH(Z4_MIN_PIN);
+  #endif
+  #if HAS_Z_MIN_PROBE_PIN
+    _ATTACH(Z_MIN_PROBE_PIN);
+  #endif
 }
--- a/Marlin/src/HAL/HAL_DUE/fastio.h
+++ b/Marlin/src/HAL/HAL_DUE/fastio.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -33,7 +33,7 @@
 * For ARDUINO_ARCH_SAM
 * Note the code here was specifically crafted by disassembling what GCC produces
 * out of it, so GCC is able to optimize it out as much as possible to the least
- * amount of instructions. Be very careful if you modify them, as "clean code"
+ * amount of instructions. Be very carefull if you modify them, as "clean code"
 * leads to less efficient compiled code!!
 */

@@ -50,7 +50,7 @@
 #define PWM_PIN(P)              WITHIN(P, 2, 13)

 #ifndef MASK
-  #define MASK(PIN) _BV(PIN)
+  #define MASK(PIN) (1 << PIN)
 #endif

 /**
@@ -58,7 +58,7 @@
 *
 * Now you can simply SET_OUTPUT(STEP); WRITE(STEP, HIGH); WRITE(STEP, LOW);
 *
- * Why double up on these macros? see https://gcc.gnu.org/onlinedocs/cpp/Stringification.html
+ * Why double up on these macros? see http://gcc.gnu.org/onlinedocs/cpp/Stringification.html
 */

 // Read a pin
@@ -163,13 +163,10 @@
 #define SET_INPUT(IO)        _SET_INPUT(IO)
 // Set pin as input with pullup (wrapper)
 #define SET_INPUT_PULLUP(IO) do{ _SET_INPUT(IO); _PULLUP(IO, HIGH); }while(0)
-// Set pin as input with pulldown (substitution)
-#define SET_INPUT_PULLDOWN   SET_INPUT
-
 // Set pin as output (wrapper) -  reads the pin and sets the output to that value
 #define SET_OUTPUT(IO)       _SET_OUTPUT(IO)
 // Set pin as PWM
-#define SET_PWM               SET_OUTPUT
+#define SET_PWM(IO)           SET_OUTPUT(IO)

 // Check if pin is an input
 #define IS_INPUT(IO)         ((digitalPinToPort(IO)->PIO_OSR & digitalPinToBitMask(IO)) == 0)
@@ -177,7 +174,7 @@
 #define IS_OUTPUT(IO)        ((digitalPinToPort(IO)->PIO_OSR & digitalPinToBitMask(IO)) != 0)

 // Shorthand
-#define OUT_WRITE(IO,V)      do{ SET_OUTPUT(IO); WRITE(IO,V); }while(0)
+#define OUT_WRITE(IO,V)       { SET_OUTPUT(IO); WRITE(IO,V); }

 // digitalRead/Write wrappers
 #define extDigitalRead(IO)    digitalRead(IO)
@@ -480,7 +477,7 @@
 #define DIO91_PIN 15
 #define DIO91_WPORT PIOB

-#ifdef ARDUINO_SAM_ARCHIM
+#if ARDUINO_SAM_ARCHIM

  #define DIO92_PIN 11
  #define DIO92_WPORT PIOC
--- a/Marlin/src/HAL/HAL_DUE/fastio/G2_PWM.cpp
+++ b/Marlin/src/HAL/HAL_DUE/fastio/G2_PWM.cpp
@@ -0,0 +1,145 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * The PWM module is only used to generate interrupts at specified times. It
+ * is NOT used to directly toggle pins. The ISR writes to the pin assigned to
+ * that interrupt.
+ *
+ * All PWMs use the same repetition rate.  The G2 needs about 10KHz min in order to
+ * not have obvious ripple on the Vref signals.
+ *
+ * The data structures are setup to minimize the computation done by the ISR which
+ * minimizes ISR execution time.  Execution times are 0.8 to 1.1 microseconds.
+ *
+ * FIve PWM interrupt sources are used.  Channel 0 sets the base period.  All Vref
+ * signals are set active when this counter overflows and resets to zero.  The compare
+ * values in channels 1-4 are set to give the desired duty cycle for that Vref pin.
+ * When counter 0 matches the compare value then that channel generates an interrupt.
+ * The ISR checks the source of the interrupt and sets the corresponding pin inactive.
+ *
+ * Some jitter in the Vref signal is OK so the interrupt priority is left at its default value.
+ */
+
+#include "../../../inc/MarlinConfig.h"
+
+#if MB(PRINTRBOARD_G2)
+
+#include "G2_PWM.h"
+
+volatile uint32_t *SODR_A = &PIOA->PIO_SODR,
+                  *SODR_B = &PIOB->PIO_SODR,
+                  *CODR_A = &PIOA->PIO_CODR,
+                  *CODR_B = &PIOB->PIO_CODR;
+
+PWM_map ISR_table[NUM_PWMS] = PWM_MAP_INIT;
+
+void Stepper::digipot_init() {
+
+  OUT_WRITE(MOTOR_CURRENT_PWM_X_PIN, 0);  // init pins
+  OUT_WRITE(MOTOR_CURRENT_PWM_Y_PIN, 0);
+  OUT_WRITE(MOTOR_CURRENT_PWM_Z_PIN, 0);
+  OUT_WRITE(MOTOR_CURRENT_PWM_E_PIN, 0);
+
+  #define WPKEY          (0x50574D << 8) // “PWM” in ASCII
+  #define WPCMD_DIS_SW   0  // command to disable Write Protect SW
+  #define WPRG_ALL       (PWM_WPCR_WPRG0 | PWM_WPCR_WPRG1 | PWM_WPCR_WPRG2 | PWM_WPCR_WPRG3 | PWM_WPCR_WPRG4 | PWM_WPCR_WPRG5)  // all Write Protect Groups
+
+  #define PWM_CLOCK_F    F_CPU / 1000000UL   // set clock to 1MHz
+
+  PMC->PMC_PCER1 = PMC_PCER1_PID36;                       // enable PWM controller clock (disabled on power up)
+
+  PWM->PWM_WPCR = WPKEY | WPRG_ALL | WPCMD_DIS_SW;        // enable setting of all PWM registers
+  PWM->PWM_CLK = PWM_CLOCK_F;                             // enable CLK_A and set it to 1MHz, leave CLK_B disabled
+  PWM->PWM_CH_NUM[0].PWM_CMR = 0b1011;                    // set channel 0 to Clock A input & to left aligned
+  PWM->PWM_CH_NUM[1].PWM_CMR = 0b1011;                    // set channel 1 to Clock A input & to left aligned
+  PWM->PWM_CH_NUM[2].PWM_CMR = 0b1011;                    // set channel 2 to Clock A input & to left aligned
+  PWM->PWM_CH_NUM[3].PWM_CMR = 0b1011;                    // set channel 3 to Clock A input & to left aligned
+  PWM->PWM_CH_NUM[4].PWM_CMR = 0b1011;                    // set channel 4 to Clock A input & to left aligned
+
+  PWM->PWM_CH_NUM[0].PWM_CPRD = PWM_PERIOD_US;            // set channel 0 Period
+
+  PWM->PWM_IER2 = PWM_IER1_CHID0;                         // generate interrupt when counter0 overflows
+  PWM->PWM_IER2 = PWM_IER2_CMPM0 | PWM_IER2_CMPM1 | PWM_IER2_CMPM2 | PWM_IER2_CMPM3 | PWM_IER2_CMPM4;        // generate interrupt on compare event
+
+  PWM->PWM_CMP[1].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[0]));   // interrupt when counter0 == CMPV - used to set Motor 1 PWM inactive
+  PWM->PWM_CMP[2].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[0]));   // interrupt when counter0 == CMPV - used to set Motor 2 PWM inactive
+  PWM->PWM_CMP[3].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[1]));   // interrupt when counter0 == CMPV - used to set Motor 3 PWM inactive
+  PWM->PWM_CMP[4].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[2]));   // interrupt when counter0 == CMPV - used to set Motor 4 PWM inactive
+
+  PWM->PWM_CMP[1].PWM_CMPM = 0x0001;  // enable compare event
+  PWM->PWM_CMP[2].PWM_CMPM = 0x0001;  // enable compare event
+  PWM->PWM_CMP[3].PWM_CMPM = 0x0001;  // enable compare event
+  PWM->PWM_CMP[4].PWM_CMPM = 0x0001;  // enable compare event
+
+  PWM->PWM_SCM = PWM_SCM_UPDM_MODE0 | PWM_SCM_SYNC0 | PWM_SCM_SYNC1 | PWM_SCM_SYNC2 | PWM_SCM_SYNC3 | PWM_SCM_SYNC4; // sync 1-4 with 0, use mode 0 for updates
+
+  PWM->PWM_ENA = PWM_ENA_CHID0 | PWM_ENA_CHID1 | PWM_ENA_CHID2 | PWM_ENA_CHID3 | PWM_ENA_CHID4;         // enable the channels used by G2
+  PWM->PWM_IER1 = PWM_IER1_CHID0 | PWM_IER1_CHID1 | PWM_IER1_CHID2 | PWM_IER1_CHID3 | PWM_IER1_CHID4;        // enable interrupts for the channels used by G2
+
+  NVIC_EnableIRQ(PWM_IRQn);     // Enable interrupt handler
+  NVIC_SetPriority(PWM_IRQn, NVIC_EncodePriority(0, 10, 0));  // normal priority for PWM module (can stand some jitter on the Vref signals)
+}
+
+void Stepper::digipot_current(const uint8_t driver, const int16_t current) {
+
+  if (!(PWM->PWM_CH_NUM[0].PWM_CPRD == PWM_PERIOD_US)) digipot_init();  // Init PWM system if needed
+
+  switch (driver) {
+    case 0: PWM->PWM_CMP[1].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update X & Y
+            PWM->PWM_CMP[2].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));
+            PWM->PWM_CMP[1].PWM_CMPMUPD = 0x0001;  // enable compare event
+            PWM->PWM_CMP[2].PWM_CMPMUPD = 0x0001;  // enable compare event
+            PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
+            break;
+    case 1: PWM->PWM_CMP[3].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update Z
+            PWM->PWM_CMP[3].PWM_CMPMUPD = 0x0001;  // enable compare event
+            PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
+            break;
+    default:PWM->PWM_CMP[4].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update E
+            PWM->PWM_CMP[4].PWM_CMPMUPD = 0x0001;  // enable compare event
+            PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
+            break;
+  }
+}
+
+volatile uint32_t PWM_ISR1_STATUS, PWM_ISR2_STATUS;
+
+void PWM_Handler() {
+  PWM_ISR1_STATUS = PWM->PWM_ISR1;
+  PWM_ISR2_STATUS = PWM->PWM_ISR2;
+  if (PWM_ISR1_STATUS & PWM_IER1_CHID0) {                           // CHAN_0 interrupt
+    *ISR_table[0].set_register = ISR_table[0].write_mask;                                          // set X to active
+    *ISR_table[1].set_register = ISR_table[1].write_mask;                                          // set Y to active
+    *ISR_table[2].set_register = ISR_table[2].write_mask;                                          // set Z to active
+    *ISR_table[3].set_register = ISR_table[3].write_mask;                                          // set E to active
+  }
+  else {
+    if (PWM_ISR2_STATUS & PWM_IER2_CMPM1)  *ISR_table[0].clr_register = ISR_table[0].write_mask;   // set X to inactive
+    if (PWM_ISR2_STATUS & PWM_IER2_CMPM2)  *ISR_table[1].clr_register = ISR_table[1].write_mask;   // set Y to inactive
+    if (PWM_ISR2_STATUS & PWM_IER2_CMPM3)  *ISR_table[2].clr_register = ISR_table[2].write_mask;   // set Z to inactive
+    if (PWM_ISR2_STATUS & PWM_IER2_CMPM4)  *ISR_table[3].clr_register = ISR_table[3].write_mask;   // set E to inactive
+  }
+  return;
+}
+
+#endif // PRINTRBOARD_G2
--- a/Marlin/src/HAL/HAL_DUE/fastio/G2_PWM.h
+++ b/Marlin/src/HAL/HAL_DUE/fastio/G2_PWM.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -63,7 +63,7 @@ extern PWM_map ISR_table[NUM_PWMS];
 extern uint32_t motor_current_setting[3];

 #define IR_BIT(p) (WITHIN(p, 0, 3) ? (p) : (p) + 4)
-#define COPY_ACTIVE_TABLE() do{ LOOP_L_N(i, 6) work_table[i] = active_table[i]; }while(0)
+#define COPY_ACTIVE_TABLE() do{ for (uint8_t i = 0; i < 6 ; i++) work_table[i] = active_table[i]; }while(0)

 #define PWM_MR0 19999         // base repetition rate minus one count - 20mS
 #define PWM_PR 24             // prescaler value - prescaler divide by 24 + 1  -  1 MHz output
--- a/Marlin/src/HAL/HAL_DUE/fastio/G2_pins.h
+++ b/Marlin/src/HAL/HAL_DUE/fastio/G2_pins.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_DUE/inc/Conditionals_LCD.h
+++ b/Marlin/src/HAL/HAL_DUE/inc/Conditionals_LCD.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_DUE/inc/Conditionals_adv.h
+++ b/Marlin/src/HAL/HAL_DUE/inc/Conditionals_adv.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_DUE/inc/Conditionals_post.h
+++ b/Marlin/src/HAL/HAL_DUE/inc/Conditionals_post.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
--- a/Marlin/src/HAL/HAL_DUE/inc/SanityCheck.h
+++ b/Marlin/src/HAL/HAL_DUE/inc/SanityCheck.h
@@ -1,6 +1,6 @@
 /**
 * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
@@ -16,7 +16,7 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #pragma once
@@ -25,30 +25,6 @@
 * Test Arduino Due specific configuration values for errors at compile-time.
 */

-/**
- * Check for common serial pin conflicts
- */
-#define CHECK_SERIAL_PIN(N) ( \
-     X_STOP_PIN == N || Y_STOP_PIN == N || Z_STOP_PIN == N \
-  || X_MIN_PIN  == N || Y_MIN_PIN  == N || Z_MIN_PIN  == N \
-  || X_MAX_PIN  == N || Y_MAX_PIN  == N || Z_MAX_PIN  == N \
-  || X_STEP_PIN == N || Y_STEP_PIN == N || Z_STEP_PIN == N \
-  || X_DIR_PIN  == N || Y_DIR_PIN  == N || Z_DIR_PIN  == N \
-  || X_ENA_PIN  == N || Y_ENA_PIN  == N || Z_ENA_PIN  == N \
-)
-#if CONF_SERIAL_IS(0) // D0-D1. No known conflicts.
-#endif
-#if CONF_SERIAL_IS(1) && (CHECK_SERIAL_PIN(18) || CHECK_SERIAL_PIN(19))
-  #error "Serial Port 1 pin D18 and/or D19 conflicts with another pin on the board."
-#endif
-#if CONF_SERIAL_IS(2) && (CHECK_SERIAL_PIN(16) || CHECK_SERIAL_PIN(17))
-  #error "Serial Port 2 pin D16 and/or D17 conflicts with another pin on the board."
-#endif
-#if CONF_SERIAL_IS(3) && (CHECK_SERIAL_PIN(14) || CHECK_SERIAL_PIN(15))
-  #error "Serial Port 3 pin D14 and/or D15 conflicts with another pin on the board."
-#endif
-#undef CHECK_SERIAL_PIN
-
 /**
 * HARDWARE VS. SOFTWARE SPI COMPATIBILITY
 *
@@ -64,7 +40,7 @@
 * Usually the hardware SPI pins are only available to the LCD. This makes the DUE hard SPI used at the same time
 * as the TMC2130 soft SPI the most common setup.
 */
-#define _IS_HW_SPI(P) (defined(TMC_SW_##P) && (TMC_SW_##P == SD_MOSI_PIN || TMC_SW_##P == SD_MISO_PIN || TMC_SW_##P == SD_SCK_PIN))
+#define _IS_HW_SPI(P) (defined(TMC_SW_##P) && (TMC_SW_##P == MOSI_PIN || TMC_SW_##P == MISO_PIN || TMC_SW_##P == SCK_PIN))

 #if ENABLED(SDSUPPORT) && HAS_DRIVER(TMC2130)
  #if ENABLED(TMC_USE_SW_SPI)
@@ -76,14 +52,10 @@
  #endif
 #endif

-#if ENABLED(FAST_PWM_FAN) || SPINDLE_LASER_FREQUENCY
-  #error "Features requiring Hardware PWM (FAST_PWM_FAN, SPINDLE_LASER_FREQUENCY) are not yet supported on DUE."
+#if ENABLED(FAST_PWM_FAN)
+  #error "FAST_PWM_FAN is not yet implemented for this platform."
 #endif

-#if HAS_TMC_SW_SERIAL
-  #error "TMC220x Software Serial is not supported on the DUE platform."
-#endif
-
-#if USING_PULLDOWNS
-  #error "PULLDOWN pin mode is not available on DUE boards."
+#if TMC_HAS_SW_SERIAL
+  #error "TMC220x Software Serial is not supported on this platform."
 #endif
--- a/Marlin/src/HAL/HAL_DUE/persistent_store_eeprom.cpp
+++ b/Marlin/src/HAL/HAL_DUE/persistent_store_eeprom.cpp
@@ -1,7 +1,7 @@
 /**
 * Marlin 3D Printer Firmware
 *
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
 * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
 * Copyright (c) 2016 Victor Perez victor_pv@hotmail.com
@@ -17,51 +17,55 @@
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #ifdef ARDUINO_ARCH_SAM

+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(EEPROM_SETTINGS)
+
 #include "../../inc/MarlinConfig.h"
+#include "../shared/persistent_store_api.h"

-#if USE_WIRED_EEPROM
-
-/**
- * PersistentStore for Arduino-style EEPROM interface
- * with simple implementations supplied by Marlin.
- */
-
-#include "../shared/eeprom_if.h"
-#include "../shared/eeprom_api.h"
-
-#ifndef MARLIN_EEPROM_SIZE
-  #error "MARLIN_EEPROM_SIZE is required for I2C / SPI EEPROM."
+#if !defined(E2END) && NONE(I2C_EEPROM, SPI_EEPROM)
+  #define E2END 0xFFF // Default to Flash emulated EEPROM size (EepromEmulation_Due.cpp)
 #endif
-size_t PersistentStore::capacity()    { return MARLIN_EEPROM_SIZE; }
-bool PersistentStore::access_start()  { eeprom_init(); return true; }
-bool PersistentStore::access_finish() { return true; }
+
+extern void eeprom_flush();
+
+bool PersistentStore::access_start() { return true; }
+
+bool PersistentStore::access_finish() {
+  #if NONE(I2C_EEPROM, SPI_EEPROM)
+    eeprom_flush();
+  #endif
+  return true;
+}

 bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
-  uint16_t written = 0;
  while (size--) {
    uint8_t * const p = (uint8_t * const)pos;
    uint8_t v = *value;
-    if (v != eeprom_read_byte(p)) { // EEPROM has only ~100,000 write cycles, so only write bytes that have changed!
+    // EEPROM has only ~100,000 write cycles,
+    // so only write bytes that have changed!
+    if (v != eeprom_read_byte(p)) {
      eeprom_write_byte(p, v);
-      if (++written & 0x7F) delay(2); else safe_delay(2); // Avoid triggering watchdog during long EEPROM writes
+      delay(2);
      if (eeprom_read_byte(p) != v) {
-        SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
+        SERIAL_ECHO_MSG(MSG_ERR_EEPROM_WRITE);
        return true;
      }
    }
    crc16(crc, &v, 1);
    pos++;
    value++;
-  }
+  };
  return false;
 }

-bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
  do {
    uint8_t c = eeprom_read_byte((uint8_t*)pos);
    if (writing) *value = c;
@@ -72,5 +76,7 @@ bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t
  return false;
 }

-#endif // USE_WIRED_EEPROM
+size_t PersistentStore::capacity() { return E2END + 1; }
+
+#endif // EEPROM_SETTINGS
 #endif // ARDUINO_ARCH_SAM
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Scott Lahteine	8eb6603e2a	Version 2.0.3	2020-01-30 19:08:05 -06:00
Scott Lahteine	caf9e93465	More files from errant merge	2020-01-30 19:08:01 -06:00
Scott Lahteine	d74f46243b	Merge remote-tracking branch 'upstream/bugfix-2.0.x' into version_203	2020-01-30 19:07:46 -06:00
Scott Lahteine	4d8dc093c9	Version 2.0.2	2020-01-29 23:19:24 -06:00
Roxy-3D	11d8c72ac5	Fix a merge error	2020-01-29 23:19:24 -06:00
Scott Lahteine	ec79034004	Remove extraneous G60/G61 lines	2020-01-27 15:41:50 -06:00
Scott Lahteine	ae2a0036eb	Merge remote-tracking branch 'upstream/bugfix-2.0.x' into release_202	2020-01-27 05:32:36 -06:00
Scott Lahteine	ccdeb3f2cd	Updates for GitHub Actions	2020-01-13 16:49:49 -06:00