🔖 Marlin 2.0.2.1

See #16612

.github/FUNDING.yml

@@ -1 +1,3 @@
-custom: http://www.thinkyhead.com/donate-to-marlin
+github: [thinkyhead]
+patreon: thinkyhead
+custom: ["http://www.thinkyhead.com/donate-to-marlin"]

.github/issue_template.md

@@ -1,16 +1,31 @@
-# NO SUPPORT REQUESTS PLEASE
+<!--
 
-Support Requests posted here will be automatically closed!
+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
 
-This Issue Queue is for Marlin bug reports and development-related issues, and we prefer not to handle user-support questions here. See https://github.com/MarlinFirmware/Marlin/blob/1.1.x/.github/contributing.md#i-dont-want-to-read-this-whole-thing-i-just-have-a-question.
+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.
 
-For best results getting help with configuration and troubleshooting, please use the following resources:
+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.
 
-- RepRap.org Marlin Forum http://forums.reprap.org/list.php?415
-- Tom's 3D Forums https://discuss.toms3d.org/
-- Facebook Group "Marlin Firmware" https://www.facebook.com/groups/1049718498464482/
-- Facebook Group "Marlin Firmware for 3D Printers" https://www.facebook.com/groups/3Dtechtalk/
-- Marlin Configuration https://www.youtube.com/results?search_query=marlin+configuration on YouTube
-- Marlin Discord server. Join link: https://discord.gg/n5NJ59y
+-->
 
-After seeking help from the community, if the consensus points to to a bug in Marlin, then you should post a Bug Report at https://github.com/MarlinFirmware/Marlin/issues/new/choose).
+### 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.

.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/**

.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

.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>"

.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 }}"

.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 }}

.travis.yml

@@ -1,84 +0,0 @@
-dist: bionic
-sudo: false
-
-language: python
-python:
-  - "3.7"
-
-notifications:
-  email: false
-
-env:
-  # Base Environments
-  - TEST_PLATFORM="DUE"
-  - TEST_PLATFORM="esp32"
-  - TEST_PLATFORM="linux_native"
-  - TEST_PLATFORM="megaatmega2560"
-  - TEST_PLATFORM="teensy31"
-  - TEST_PLATFORM="teensy35"
-
-  # Extended AVR Environments
-  - TEST_PLATFORM="FYSETC_F6_13"
-  - TEST_PLATFORM="megaatmega1280"
-  - TEST_PLATFORM="rambo"
-  - TEST_PLATFORM="sanguino_atmega1284p"
-  - TEST_PLATFORM="sanguino_atmega644p"
-
-  # Extended STM32 Environments
-  - TEST_PLATFORM="STM32F103RC_bigtree"
-  - TEST_PLATFORM="STM32F103RC_bigtree_USB"
-  - TEST_PLATFORM="STM32F103RE_bigtree"
-  - TEST_PLATFORM="STM32F103RE_bigtree_USB"
-  - TEST_PLATFORM="STM32F103RC_fysetc"
-  - TEST_PLATFORM="jgaurora_a5s_a1"
-  - TEST_PLATFORM="STM32F103VE_longer"
-  - TEST_PLATFORM="STM32F407VE_black"
-  - TEST_PLATFORM="BIGTREE_SKR_PRO"
-  - TEST_PLATFORM="mks_robin"
-  - TEST_PLATFORM="ARMED"
-
-  # STM32 with non-STM framework. both broken for now. they should use HAL_STM32 which is working.
-  #- TEST_PLATFORM="STM32F4"
-  #- TEST_PLATFORM="STM32F7"
-
-  # Put lengthy tests last
-  - TEST_PLATFORM="LPC1768"
-  - TEST_PLATFORM="LPC1769"
-
-  # Non-working environment tests
-  #- TEST_PLATFORM="BIGTREE_BTT002" this board isn't released yet. we need pinout to be sure about what we do
-  #- TEST_PLATFORM="at90usb1286_cdc"
-  #- TEST_PLATFORM="at90usb1286_dfu"
-  #- TEST_PLATFORM="STM32F103CB_malyan"
-  #- TEST_PLATFORM="mks_robin_lite"
-  #- TEST_PLATFORM="mks_robin_mini"
-  #- TEST_PLATFORM="mks_robin_nano"
-  #- TEST_PLATFORM="SAMD51_grandcentral_m4"
-
-before_install:
-  #
-  # Fetch the tag information for the current branch
-  - git fetch origin --tags
-  #
-  # Publish the buildroot script folder
-  - chmod +x ${TRAVIS_BUILD_DIR}/buildroot/bin/*
-  - chmod +x ${TRAVIS_BUILD_DIR}/buildroot/share/tests/*
-  - export PATH=${TRAVIS_BUILD_DIR}/buildroot/bin/:${TRAVIS_BUILD_DIR}/buildroot/share/tests/:${PATH}
-
-install:
-  #- pip install -U platformio
-  - pip install -U https://github.com/platformio/platformio-core/archive/master.zip
-
-before_script:
-  # Update PlatformIO packages
-  - platformio update
-  #
-  # Change current working directory to the build dir
-  - cd ${TRAVIS_BUILD_DIR}
-  #
-  # Generate custom version include
-  - generate_version ${TRAVIS_BUILD_DIR}/Marlin/
-  - cat ${TRAVIS_BUILD_DIR}/Marlin/Version.h
-  #
-script:
-  - run_tests ${TRAVIS_BUILD_DIR} ${TEST_PLATFORM}

Marlin/Configuration.h

@@ -143,7 +143,7 @@
 // @section extruder
 
 // This defines the number of extruders
-// :[1, 2, 3, 4, 5, 6]
+// :[1, 2, 3, 4, 5, 6, 7, 8]
 #define EXTRUDERS 1
 
 // Generally expected filament diameter (1.75, 2.85, 3.0, ...). Used for Volumetric, Filament Width Sensor, etc.
@@ -360,7 +360,8 @@
  *    -1 : thermocouple with AD595
  *     0 : not used
  *     1 : 100k thermistor - best choice for EPCOS 100k (4.7k pullup)
- *   331 : (3.3V scaled thermistor 1 table)
+ *   331 : (3.3V scaled thermistor 1 table for MEGA)
+ *   332 : (3.3V scaled thermistor 1 table for DUE)
  *     2 : 200k thermistor - ATC Semitec 204GT-2 (4.7k pullup)
  *     3 : Mendel-parts thermistor (4.7k pullup)
  *     4 : 10k thermistor !! do not use it for a hotend. It gives bad resolution at high temp. !!
@@ -411,7 +412,10 @@
 #define TEMP_SENSOR_3 0
 #define TEMP_SENSOR_4 0
 #define TEMP_SENSOR_5 0
+#define TEMP_SENSOR_6 0
+#define TEMP_SENSOR_7 0
 #define TEMP_SENSOR_BED 0
+#define TEMP_SENSOR_PROBE 0
 #define TEMP_SENSOR_CHAMBER 0
 
 // Dummy thermistor constant temperature readings, for use with 998 and 999
@@ -439,6 +443,8 @@
 #define HEATER_3_MINTEMP   5
 #define HEATER_4_MINTEMP   5
 #define HEATER_5_MINTEMP   5
+#define HEATER_6_MINTEMP   5
+#define HEATER_7_MINTEMP   5
 #define BED_MINTEMP        5
 
 // Above this temperature the heater will be switched off.
@@ -450,6 +456,8 @@
 #define HEATER_3_MAXTEMP 275
 #define HEATER_4_MAXTEMP 275
 #define HEATER_5_MAXTEMP 275
+#define HEATER_6_MAXTEMP 275
+#define HEATER_7_MAXTEMP 275
 #define BED_MAXTEMP      150
 
 //===========================================================================
@@ -654,12 +662,13 @@
  *
  * A4988 is assumed for unspecified drivers.
  *
- * Options: A4988, A5984, DRV8825, LV8729, L6470, TB6560, TB6600, TMC2100,
+ * Options: A4988, A5984, DRV8825, LV8729, L6470, L6474, POWERSTEP01,
+ *          TB6560, TB6600, TMC2100,
  *          TMC2130, TMC2130_STANDALONE, TMC2160, TMC2160_STANDALONE,
  *          TMC2208, TMC2208_STANDALONE, TMC2209, TMC2209_STANDALONE,
  *          TMC26X,  TMC26X_STANDALONE,  TMC2660, TMC2660_STANDALONE,
  *          TMC5130, TMC5130_STANDALONE, TMC5160, TMC5160_STANDALONE
- * :['A4988', 'A5984', 'DRV8825', 'LV8729', 'L6470', 'TB6560', 'TB6600', 'TMC2100', 'TMC2130', 'TMC2130_STANDALONE', 'TMC2160', 'TMC2160_STANDALONE', 'TMC2208', 'TMC2208_STANDALONE', 'TMC2209', 'TMC2209_STANDALONE', 'TMC26X', 'TMC26X_STANDALONE', 'TMC2660', 'TMC2660_STANDALONE', 'TMC5130', 'TMC5130_STANDALONE', 'TMC5160', 'TMC5160_STANDALONE']
+ * :['A4988', 'A5984', 'DRV8825', 'LV8729', 'L6470', 'L6474', 'POWERSTEP01', 'TB6560', 'TB6600', 'TMC2100', 'TMC2130', 'TMC2130_STANDALONE', 'TMC2160', 'TMC2160_STANDALONE', 'TMC2208', 'TMC2208_STANDALONE', 'TMC2209', 'TMC2209_STANDALONE', 'TMC26X', 'TMC26X_STANDALONE', 'TMC2660', 'TMC2660_STANDALONE', 'TMC5130', 'TMC5130_STANDALONE', 'TMC5160', 'TMC5160_STANDALONE']
  */
 //#define X_DRIVER_TYPE  A4988
 //#define Y_DRIVER_TYPE  A4988
@@ -668,12 +677,15 @@
 //#define Y2_DRIVER_TYPE A4988
 //#define Z2_DRIVER_TYPE A4988
 //#define Z3_DRIVER_TYPE A4988
+//#define Z4_DRIVER_TYPE A4988
 //#define E0_DRIVER_TYPE A4988
 //#define E1_DRIVER_TYPE A4988
 //#define E2_DRIVER_TYPE A4988
 //#define E3_DRIVER_TYPE A4988
 //#define E4_DRIVER_TYPE A4988
 //#define E5_DRIVER_TYPE A4988
+//#define E6_DRIVER_TYPE A4988
+//#define E7_DRIVER_TYPE A4988
 
 // Enable this feature if all enabled endstop pins are interrupt-capable.
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
@@ -855,6 +867,12 @@
  */
 //#define FIX_MOUNTED_PROBE
 
+/**
+ * Use the nozzle as the probe, as with a conductive
+ * nozzle system or a piezo-electric smart effector.
+ */
+//#define NOZZLE_AS_PROBE
+
 /**
  * Z Servo Probe, such as an endstop switch on a rotating arm.
  */
@@ -897,6 +915,13 @@
   #define Z_PROBE_RETRACT_X X_MAX_POS
 #endif
 
+// Duet Smart Effector (for delta printers) - https://bit.ly/2ul5U7J
+// When the pin is defined you can use M672 to set/reset the probe sensivity.
+//#define DUET_SMART_EFFECTOR
+#if ENABLED(DUET_SMART_EFFECTOR)
+  #define SMART_EFFECTOR_MOD_PIN  -1  // Connect a GPIO pin to the Smart Effector MOD pin
+#endif
+
 //
 // For Z_PROBE_ALLEN_KEY see the Delta example configurations.
 //
@@ -923,7 +948,8 @@
  */
 #define NOZZLE_TO_PROBE_OFFSET { 10, 10, 0 }
 
-// Certain types of probes need to stay away from edges
+// Most probes should stay away from the edges of the bed, but
+// with NOZZLE_AS_PROBE this can be negative for a wider probing area.
 #define MIN_PROBE_EDGE 10
 
 // X and Y axis travel speed (mm/m) between probes
@@ -1033,6 +1059,8 @@
 #define INVERT_E3_DIR false
 #define INVERT_E4_DIR false
 #define INVERT_E5_DIR false
+#define INVERT_E6_DIR false
+#define INVERT_E7_DIR false
 
 // @section homing
 
@@ -1418,11 +1446,6 @@
 #define DEFAULT_KEEPALIVE_INTERVAL 2  // Number of seconds between "busy" messages. Set with M113.
 #define BUSY_WHILE_HEATING            // Some hosts require "busy" messages even during heating
 
-//
-// M100 Free Memory Watcher
-//
-//#define M100_FREE_MEMORY_WATCHER    // Add M100 (Free Memory Watcher) to debug memory usage
-
 //
 // G20/G21 Inch mode support
 //
@@ -1513,9 +1536,10 @@
   // Default number of triangles
   #define NOZZLE_CLEAN_TRIANGLES  3
 
-  // Specify positions as { X, Y, Z }
-  #define NOZZLE_CLEAN_START_POINT {  30, 30, (Z_MIN_POS + 1) }
-  #define NOZZLE_CLEAN_END_POINT   { 100, 60, (Z_MIN_POS + 1) }
+  // Specify positions for each tool as { { X, Y, Z }, { X, Y, Z } }
+  // Dual hotend system may use { {  -20, (Y_BED_SIZE / 2), (Z_MIN_POS + 1) },  {  420, (Y_BED_SIZE / 2), (Z_MIN_POS + 1) }}
+  #define NOZZLE_CLEAN_START_POINT { {  30, 30, (Z_MIN_POS + 1) } }
+  #define NOZZLE_CLEAN_END_POINT   { { 100, 60, (Z_MIN_POS + 1) } }
 
   // Circular pattern radius
   #define NOZZLE_CLEAN_CIRCLE_RADIUS 6.5
@@ -1769,7 +1793,7 @@
 
 //
 // Makeboard 3D Printer Parts 3D Printer Mini Display 1602 Mini Controller
-// https://www.aliexpress.com/item/Micromake-Makeboard-3D-Printer-Parts-3D-Printer-Mini-Display-1602-Mini-Controller-Compatible-with-Ramps-1/32765887917.html
+// https://www.aliexpress.com/item/32765887917.html
 //
 //#define MAKEBOARD_MINI_2_LINE_DISPLAY_1602
 
@@ -1936,20 +1960,26 @@
 // FYSETC variant of the MINI12864 graphic controller with SD support
 // https://wiki.fysetc.com/Mini12864_Panel/
 //
-//#define FYSETC_MINI_12864_X_X  // Type C/D/E/F. No tunable RGB Backlight by default
-//#define FYSETC_MINI_12864_1_2  // Type C/D/E/F. Simple RGB Backlight (always on)
-//#define FYSETC_MINI_12864_2_0  // Type A/B. Discreet RGB Backlight
-//#define FYSETC_MINI_12864_2_1  // Type A/B. Neopixel RGB Backlight
+//#define FYSETC_MINI_12864_X_X    // Type C/D/E/F. No tunable RGB Backlight by default
+//#define FYSETC_MINI_12864_1_2    // Type C/D/E/F. Simple RGB Backlight (always on)
+//#define FYSETC_MINI_12864_2_0    // Type A/B. Discreet RGB Backlight
+//#define FYSETC_MINI_12864_2_1    // Type A/B. Neopixel RGB Backlight
+//#define FYSETC_GENERIC_12864_1_1 // Larger display with basic ON/OFF backlight.
 
 //
 // Factory display for Creality CR-10
-// https://www.aliexpress.com/item/Universal-LCD-12864-3D-Printer-Display-Screen-With-Encoder-For-CR-10-CR-7-Model/32833148327.html
+// https://www.aliexpress.com/item/32833148327.html
 //
 // This is RAMPS-compatible using a single 10-pin connector.
 // (For CR-10 owners who want to replace the Melzi Creality board but retain the display)
 //
 //#define CR10_STOCKDISPLAY
 
+//
+// Ender-2 OEM display, a variant of the MKS_MINI_12864
+//
+//#define ENDER2_STOCKDISPLAY
+
 //
 // ANET and Tronxy Graphical Controller
 //
@@ -1961,7 +1991,7 @@
 
 //
 // AZSMZ 12864 LCD with SD
-// https://www.aliexpress.com/store/product/3D-printer-smart-controller-SMART-RAMPS-OR-RAMPS-1-4-LCD-12864-LCD-control-panel-green/2179173_32213636460.html
+// https://www.aliexpress.com/item/32837222770.html
 //
 //#define AZSMZ_12864
 
@@ -2018,9 +2048,11 @@
 //=============================================================================
 
 //
-// DGUS Touch Display with DWIN OS
+// DGUS Touch Display with DWIN OS. (Choose one.)
 //
-//#define DGUS_LCD
+//#define DGUS_LCD_UI_ORIGIN
+//#define DGUS_LCD_UI_FYSETC
+//#define DGUS_LCD_UI_HIPRECY
 
 //
 // Touch-screen LCD for Malyan M200 printers

Marlin/Configuration_adv.h

@@ -78,6 +78,18 @@
   #define HOTEND5_BETA                 3950    // Beta value
 #endif
 
+#if TEMP_SENSOR_6 == 1000
+  #define HOTEND6_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
+  #define HOTEND6_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
+  #define HOTEND6_BETA                 3950    // Beta value
+#endif
+
+#if TEMP_SENSOR_7 == 1000
+  #define HOTEND7_PULLUP_RESISTOR_OHMS 4700    // Pullup resistor
+  #define HOTEND7_RESISTANCE_25C_OHMS  100000  // Resistance at 25C
+  #define HOTEND7_BETA                 3950    // Beta value
+#endif
+
 #if TEMP_SENSOR_BED == 1000
   #define BED_PULLUP_RESISTOR_OHMS     4700    // Pullup resistor
   #define BED_RESISTANCE_25C_OHMS      100000  // Resistance at 25C
@@ -165,28 +177,28 @@
  * Thermal Protection parameters for the bed are just as above for hotends.
  */
 #if ENABLED(THERMAL_PROTECTION_BED)
-  #define THERMAL_PROTECTION_BED_PERIOD 20    // Seconds
-  #define THERMAL_PROTECTION_BED_HYSTERESIS 2 // Degrees Celsius
+  #define THERMAL_PROTECTION_BED_PERIOD        20 // Seconds
+  #define THERMAL_PROTECTION_BED_HYSTERESIS     2 // Degrees Celsius
 
   /**
    * As described above, except for the bed (M140/M190/M303).
    */
-  #define WATCH_BED_TEMP_PERIOD 60                // Seconds
-  #define WATCH_BED_TEMP_INCREASE 2               // Degrees Celsius
+  #define WATCH_BED_TEMP_PERIOD                60 // Seconds
+  #define WATCH_BED_TEMP_INCREASE               2 // Degrees Celsius
 #endif
 
 /**
  * Thermal Protection parameters for the heated chamber.
  */
 #if ENABLED(THERMAL_PROTECTION_CHAMBER)
-  #define THERMAL_PROTECTION_CHAMBER_PERIOD 20    // Seconds
+  #define THERMAL_PROTECTION_CHAMBER_PERIOD    20 // Seconds
   #define THERMAL_PROTECTION_CHAMBER_HYSTERESIS 2 // Degrees Celsius
 
   /**
    * Heated chamber watch settings (M141/M191).
    */
-  #define WATCH_CHAMBER_TEMP_PERIOD 60            // Seconds
-  #define WATCH_CHAMBER_TEMP_INCREASE 2           // Degrees Celsius
+  #define WATCH_CHAMBER_TEMP_PERIOD            60 // Seconds
+  #define WATCH_CHAMBER_TEMP_INCREASE           2 // Degrees Celsius
 #endif
 
 #if ENABLED(PIDTEMP)
@@ -368,7 +380,7 @@
  * FAST_PWM_FAN_FREQUENCY [undefined by default]
  *   Set this to your desired frequency.
  *   If left undefined this defaults to F = F_CPU/(2*255*1)
- *   ie F = 31.4 Khz on 16 MHz microcontrollers or F = 39.2 KHz on 20 MHz microcontrollers
+ *   i.e., F = 31.4kHz on 16MHz microcontrollers or F = 39.2kHz on 20MHz microcontrollers.
  *   These defaults are the same as with the old FAST_PWM_FAN implementation - no migration is required
  *   NOTE: Setting very low frequencies (< 10 Hz) may result in unexpected timer behavior.
  *
@@ -479,7 +491,7 @@
   //#define X_DUAL_ENDSTOPS
   #if ENABLED(X_DUAL_ENDSTOPS)
     #define X2_USE_ENDSTOP _XMAX_
-    #define X_DUAL_ENDSTOPS_ADJUSTMENT  0
+    #define X2_ENDSTOP_ADJUSTMENT  0
   #endif
 #endif
 
@@ -489,27 +501,28 @@
   //#define Y_DUAL_ENDSTOPS
   #if ENABLED(Y_DUAL_ENDSTOPS)
     #define Y2_USE_ENDSTOP _YMAX_
-    #define Y_DUAL_ENDSTOPS_ADJUSTMENT  0
+    #define Y2_ENDSTOP_ADJUSTMENT  0
   #endif
 #endif
 
-//#define Z_DUAL_STEPPER_DRIVERS
-#if ENABLED(Z_DUAL_STEPPER_DRIVERS)
-  //#define Z_DUAL_ENDSTOPS
-  #if ENABLED(Z_DUAL_ENDSTOPS)
-    #define Z2_USE_ENDSTOP _XMAX_
-    #define Z_DUAL_ENDSTOPS_ADJUSTMENT  0
-  #endif
-#endif
+//
+// For Z set the number of stepper drivers
+//
+#define NUM_Z_STEPPER_DRIVERS 1   // (1-4) Z options change based on how many
 
-//#define Z_TRIPLE_STEPPER_DRIVERS
-#if ENABLED(Z_TRIPLE_STEPPER_DRIVERS)
-  //#define Z_TRIPLE_ENDSTOPS
-  #if ENABLED(Z_TRIPLE_ENDSTOPS)
-    #define Z2_USE_ENDSTOP _XMAX_
-    #define Z3_USE_ENDSTOP _YMAX_
-    #define Z_TRIPLE_ENDSTOPS_ADJUSTMENT2  0
-    #define Z_TRIPLE_ENDSTOPS_ADJUSTMENT3  0
+#if NUM_Z_STEPPER_DRIVERS > 1
+  //#define Z_MULTI_ENDSTOPS
+  #if ENABLED(Z_MULTI_ENDSTOPS)
+    #define Z2_USE_ENDSTOP          _XMAX_
+    #define Z2_ENDSTOP_ADJUSTMENT   0
+    #if NUM_Z_STEPPER_DRIVERS >= 3
+      #define Z3_USE_ENDSTOP        _YMAX_
+      #define Z3_ENDSTOP_ADJUSTMENT 0
+    #endif
+    #if NUM_Z_STEPPER_DRIVERS >= 4
+      #define Z4_USE_ENDSTOP        _ZMAX_
+      #define Z4_ENDSTOP_ADJUSTMENT 0
+    #endif
   #endif
 #endif
 
@@ -656,7 +669,7 @@
 //#define Z_STEPPER_AUTO_ALIGN
 #if ENABLED(Z_STEPPER_AUTO_ALIGN)
   // Define probe X and Y positions for Z1, Z2 [, Z3]
-  #define Z_STEPPER_ALIGN_XY { {  10, 290 }, { 150,  10 }, { 290, 290 } }
+  #define Z_STEPPER_ALIGN_XY { {  10, 190 }, { 100,  10 }, { 190, 190 } }
 
   // Provide Z stepper positions for more rapid convergence in bed alignment.
   // Currently requires triple stepper drivers.
@@ -1243,6 +1256,44 @@
 
 #endif // HAS_GRAPHICAL_LCD
 
+//
+// Additional options for DGUS / DWIN displays
+//
+#if HAS_DGUS_LCD
+  #define DGUS_SERIAL_PORT 2
+  #define DGUS_BAUDRATE 115200
+
+  #define DGUS_RX_BUFFER_SIZE 128
+  #define DGUS_TX_BUFFER_SIZE 48
+  //#define DGUS_SERIAL_STATS_RX_BUFFER_OVERRUNS  // Fix Rx overrun situation (Currently only for AVR)
+
+  #define DGUS_UPDATE_INTERVAL_MS  500    // (ms) Interval between automatic screen updates
+  #define BOOTSCREEN_TIMEOUT      3000    // (ms) Duration to display the boot screen
+
+  #if EITHER(DGUS_LCD_UI_FYSETC, DGUS_LCD_UI_HIPRECY)
+    #define DGUS_PRINT_FILENAME           // Display the filename during printing
+    #define DGUS_PREHEAT_UI               // Display a preheat screen during heatup
+
+    #if ENABLED(DGUS_LCD_UI_FYSETC)
+      //#define DUGS_UI_MOVE_DIS_OPTION   // Disabled by default for UI_FYSETC
+    #else
+      #define DUGS_UI_MOVE_DIS_OPTION     // Enabled by default for UI_HIPRECY
+    #endif
+
+    #define DGUS_FILAMENT_LOADUNLOAD
+    #if ENABLED(DGUS_FILAMENT_LOADUNLOAD)
+      #define DGUS_FILAMENT_PURGE_LENGTH 10
+      #define DGUS_FILAMENT_LOAD_LENGTH_PER_TIME 0.5 // (mm) Adjust in proportion to DGUS_UPDATE_INTERVAL_MS
+    #endif
+
+    #define DGUS_UI_WAITING               // Show a "waiting" screen between some screens
+    #if ENABLED(DGUS_UI_WAITING)
+      #define DGUS_UI_WAITING_STATUS 10
+      #define DGUS_UI_WAITING_STATUS_PERIOD 8 // Increase to slower waiting status looping
+    #endif
+  #endif
+#endif // HAS_DGUS_LCD
+
 //
 // Touch UI for the FTDI Embedded Video Engine (EVE)
 //
@@ -1341,6 +1392,13 @@
   //#define TFT_BTOKMENU_COLOR 0x145F // 00010 100010 11111 Cyan
 #endif
 
+//
+// ADC Button Debounce
+//
+#if HAS_ADC_BUTTONS
+  #define ADC_BUTTON_DEBOUNCE_DELAY 16  // (ms) Increase if buttons bounce or repeat too fast
+#endif
+
 // @section safety
 
 /**
@@ -1438,7 +1496,8 @@
  * Override MIN_PROBE_EDGE for each side of the build plate
  * Useful to get probe points to exact positions on targets or
  * to allow leveling to avoid plate clamps on only specific
- * sides of the bed.
+ * sides of the bed. With NOZZLE_AS_PROBE negative values are
+ * allowed, to permit probing outside the bed.
  *
  * If you are replacing the prior *_PROBE_BED_POSITION options,
  * LEFT and FRONT values in most cases will map directly over
@@ -1483,18 +1542,57 @@
 
 #endif
 
+/**
+ * Thermal Probe Compensation
+ * Probe measurements are adjusted to compensate for temperature distortion.
+ * Use G76 to calibrate this feature. Use M871 to set values manually.
+ * For a more detailed explanation of the process see G76_M871.cpp.
+ */
+#if HAS_BED_PROBE && TEMP_SENSOR_PROBE && TEMP_SENSOR_BED
+  // Enable thermal first layer compensation using bed and probe temperatures
+  #define PROBE_TEMP_COMPENSATION
+
+  // Add additional compensation depending on hotend temperature
+  // Note: this values cannot be calibrated and have to be set manually
+  #ifdef PROBE_TEMP_COMPENSATION
+    // Max temperature that can be reached by heated bed.
+    // This is required only for the calibration process.
+    #define PTC_MAX_BED_TEMP 110
+
+    // Park position to wait for probe cooldown
+    #define PTC_PARK_POS_X 0.0F
+    #define PTC_PARK_POS_Y 0.0F
+    #define PTC_PARK_POS_Z 100.0F
+
+    // Probe position to probe and wait for probe to reach target temperature
+    #define PTC_PROBE_POS_X  90.0F
+    #define PTC_PROBE_POS_Y 100.0F
+
+    // Enable additional compensation using hotend temperature
+    // Note: this values cannot be calibrated automatically but have to be set manually
+    //#define USE_TEMP_EXT_COMPENSATION
+  #endif
+#endif
+
 // @section extras
 
+//
+// G60/G61 Position Save and Return
+//
+//#define SAVED_POSITIONS 1         // Each saved position slot costs 12 bytes
+
 //
 // G2/G3 Arc Support
 //
-#define ARC_SUPPORT               // Disable this feature to save ~3226 bytes
+#define ARC_SUPPORT                 // Disable this feature to save ~3226 bytes
 #if ENABLED(ARC_SUPPORT)
-  #define MM_PER_ARC_SEGMENT  1   // Length of each arc segment
-  #define MIN_ARC_SEGMENTS   24   // Minimum number of segments in a complete circle
-  #define N_ARC_CORRECTION   25   // Number of interpolated segments between corrections
-  //#define ARC_P_CIRCLES         // Enable the 'P' parameter to specify complete circles
-  //#define CNC_WORKSPACE_PLANES  // Allow G2/G3 to operate in XY, ZX, or YZ planes
+  #define MM_PER_ARC_SEGMENT      1 // (mm) Length (or minimum length) of each arc segment
+  //#define ARC_SEGMENTS_PER_R    1 // Max segment length, MM_PER = Min
+  #define MIN_ARC_SEGMENTS       24 // Minimum number of segments in a complete circle
+  //#define ARC_SEGMENTS_PER_SEC 50 // Use feedrate to choose segment length (with MM_PER_ARC_SEGMENT as the minimum)
+  #define N_ARC_CORRECTION       25 // Number of interpolated segments between corrections
+  //#define ARC_P_CIRCLES           // Enable the 'P' parameter to specify complete circles
+  //#define CNC_WORKSPACE_PLANES    // Allow G2/G3 to operate in XY, ZX, or YZ planes
 #endif
 
 // Support for G5 with XYZE destination and IJPQ offsets. Requires ~2666 bytes.
@@ -1548,12 +1646,12 @@
 /**
  * Maximum stepping rate (in Hz) the stepper driver allows
  *  If undefined, defaults to 1MHz / (2 * MINIMUM_STEPPER_PULSE)
- *  500000 : Maximum for A4988 stepper driver
- *  400000 : Maximum for TMC2xxx stepper drivers
- *  250000 : Maximum for DRV8825 stepper driver
- *  200000 : Maximum for LV8729 stepper driver
- *  150000 : Maximum for TB6600 stepper driver
- *   15000 : Maximum for TB6560 stepper driver
+ *  5000000 : Maximum for TMC2xxx stepper drivers
+ *  1000000 : Maximum for LV8729 stepper driver
+ *  500000  : Maximum for A4988 stepper driver
+ *  250000  : Maximum for DRV8825 stepper driver
+ *  150000  : Maximum for TB6600 stepper driver
+ *   15000  : Maximum for TB6560 stepper driver
  *
  * Override the default value based on the driver type set in Configuration.h.
  */
@@ -1691,6 +1789,9 @@
   // Z raise distance for tool-change, as needed for some extruders
   #define TOOLCHANGE_ZRAISE     2  // (mm)
   //#define TOOLCHANGE_NO_RETURN   // Never return to the previous position on tool-change
+  #if ENABLED(TOOLCHANGE_NO_RETURN)
+    //#define EVENT_GCODE_AFTER_TOOLCHANGE "G12X"   // G-code to run after tool-change is complete
+  #endif
 
   // Retract and prime filament on tool-change
   //#define TOOLCHANGE_FILAMENT_SWAP
@@ -1751,9 +1852,10 @@
   //#define ADVANCED_PAUSE_FANS_PAUSE             // Turn off print-cooling fans while the machine is paused.
 
                                                   // Filament Unload does a Retract, Delay, and Purge first:
-  #define FILAMENT_UNLOAD_RETRACT_LENGTH      13  // (mm) Unload initial retract length.
-  #define FILAMENT_UNLOAD_DELAY             5000  // (ms) Delay for the filament to cool after retract.
+  #define FILAMENT_UNLOAD_PURGE_RETRACT       13  // (mm) Unload initial retract length.
+  #define FILAMENT_UNLOAD_PURGE_DELAY       5000  // (ms) Delay for the filament to cool after retract.
   #define FILAMENT_UNLOAD_PURGE_LENGTH         8  // (mm) An unretract is done, then this length is purged.
+  #define FILAMENT_UNLOAD_PURGE_FEEDRATE      25  // (mm/s) feedrate to purge before unload
 
   #define PAUSE_PARK_NOZZLE_TIMEOUT           45  // (seconds) Time limit before the nozzle is turned off for safety.
   #define FILAMENT_CHANGE_ALERT_BEEPS         10  // Number of alert beeps to play when a response is needed.
@@ -1818,6 +1920,12 @@
     #define Z3_MICROSTEPS       16
   #endif
 
+  #if AXIS_DRIVER_TYPE_Z4(TMC26X)
+    #define Z4_MAX_CURRENT    1000
+    #define Z4_SENSE_RESISTOR   91
+    #define Z4_MICROSTEPS       16
+  #endif
+
   #if AXIS_DRIVER_TYPE_E0(TMC26X)
     #define E0_MAX_CURRENT    1000
     #define E0_SENSE_RESISTOR   91
@@ -1854,6 +1962,18 @@
     #define E5_MICROSTEPS       16
   #endif
 
+  #if AXIS_DRIVER_TYPE_E6(TMC26X)
+    #define E6_MAX_CURRENT    1000
+    #define E6_SENSE_RESISTOR   91
+    #define E6_MICROSTEPS       16
+  #endif
+
+  #if AXIS_DRIVER_TYPE_E7(TMC26X)
+    #define E7_MAX_CURRENT    1000
+    #define E7_SENSE_RESISTOR   91
+    #define E7_MICROSTEPS       16
+  #endif
+
 #endif // TMC26X
 
 // @section tmc_smart
@@ -1935,6 +2055,14 @@
     #define Z3_CHAIN_POS     -1
   #endif
 
+  #if AXIS_IS_TMC(Z4)
+    #define Z4_CURRENT      800
+    #define Z4_CURRENT_HOME Z4_CURRENT
+    #define Z4_MICROSTEPS    16
+    #define Z4_RSENSE         0.11
+    #define Z4_CHAIN_POS     -1
+  #endif
+
   #if AXIS_IS_TMC(E0)
     #define E0_CURRENT      800
     #define E0_MICROSTEPS    16
@@ -1977,6 +2105,20 @@
     #define E5_CHAIN_POS     -1
   #endif
 
+  #if AXIS_IS_TMC(E6)
+    #define E6_CURRENT      800
+    #define E6_MICROSTEPS    16
+    #define E6_RSENSE         0.11
+    #define E6_CHAIN_POS     -1
+  #endif
+
+  #if AXIS_IS_TMC(E7)
+    #define E7_CURRENT      800
+    #define E7_MICROSTEPS    16
+    #define E7_RSENSE         0.11
+    #define E7_CHAIN_POS     -1
+  #endif
+
   /**
    * Override default SPI pins for TMC2130, TMC2160, TMC2660, TMC5130 and TMC5160 drivers here.
    * The default pins can be found in your board's pins file.
@@ -1994,6 +2136,8 @@
   //#define E3_CS_PIN         -1
   //#define E4_CS_PIN         -1
   //#define E5_CS_PIN         -1
+  //#define E6_CS_PIN         -1
+  //#define E7_CS_PIN         -1
 
   /**
    * Software option for SPI driven drivers (TMC2130, TMC2160, TMC2660, TMC5130 and TMC5160).
@@ -2024,12 +2168,15 @@
   #define Y2_SLAVE_ADDRESS 0
   #define Z2_SLAVE_ADDRESS 0
   #define Z3_SLAVE_ADDRESS 0
+  #define Z4_SLAVE_ADDRESS 0
   #define E0_SLAVE_ADDRESS 0
   #define E1_SLAVE_ADDRESS 0
   #define E2_SLAVE_ADDRESS 0
   #define E3_SLAVE_ADDRESS 0
   #define E4_SLAVE_ADDRESS 0
   #define E5_SLAVE_ADDRESS 0
+  #define E6_SLAVE_ADDRESS 0
+  #define E7_SLAVE_ADDRESS 0
 
   /**
    * Software enable
@@ -2099,12 +2246,15 @@
   #define Z_HYBRID_THRESHOLD       3
   #define Z2_HYBRID_THRESHOLD      3
   #define Z3_HYBRID_THRESHOLD      3
+  #define Z4_HYBRID_THRESHOLD      3
   #define E0_HYBRID_THRESHOLD     30
   #define E1_HYBRID_THRESHOLD     30
   #define E2_HYBRID_THRESHOLD     30
   #define E3_HYBRID_THRESHOLD     30
   #define E4_HYBRID_THRESHOLD     30
   #define E5_HYBRID_THRESHOLD     30
+  #define E6_HYBRID_THRESHOLD     30
+  #define E7_HYBRID_THRESHOLD     30
 
   /**
    * Use StallGuard2 to home / probe X, Y, Z.
@@ -2128,8 +2278,6 @@
    *
    * IMPROVE_HOMING_RELIABILITY tunes acceleration and jerk when
    * homing and adds a guard period for endstop triggering.
-   *
-   * TMC2209 requires STEALTHCHOP enabled for SENSORLESS_HOMING
    */
   //#define SENSORLESS_HOMING // StallGuard capable drivers only
 
@@ -2148,7 +2296,6 @@
     #define Y_STALL_SENSITIVITY  8
     //#define Z_STALL_SENSITIVITY  8
     //#define SPI_ENDSTOPS              // TMC2130 only
-    //#define HOME_USING_SPREADCYCLE
     //#define IMPROVE_HOMING_RELIABILITY
   #endif
 
@@ -2179,12 +2326,12 @@
 
 #endif // HAS_TRINAMIC
 
-// @section L6470
+// @section L64XX
 
 /**
- * L6470 Stepper Driver options
+ * L64XX Stepper Driver options
  *
- * Arduino-L6470 library (0.7.0 or higher) is required for this stepper driver.
+ * Arduino-L6470 library (0.8.0 or higher) is required.
  * https://github.com/ameyer/Arduino-L6470
  *
  * Requires the following to be defined in your pins_YOUR_BOARD file
@@ -2192,114 +2339,160 @@
  *     L6470_CHAIN_MISO_PIN
  *     L6470_CHAIN_MOSI_PIN
  *     L6470_CHAIN_SS_PIN
- *     L6470_RESET_CHAIN_PIN  (optional)
+ *     ENABLE_RESET_L64XX_CHIPS(Q)  where Q is 1 to enable and 0 to reset
  */
-#if HAS_DRIVER(L6470)
+
+#if HAS_L64XX
 
   //#define L6470_CHITCHAT        // Display additional status info
 
-  #if AXIS_DRIVER_TYPE_X(L6470)
-    #define X_MICROSTEPS     128  // Number of microsteps (VALID: 1, 2, 4, 8, 16, 32, 128)
-    #define X_OVERCURRENT   2000  // (mA) Current where the driver detects an over current (VALID: 375 x (1 - 16) - 6A max - rounds down)
-    #define X_STALLCURRENT  1500  // (mA) Current where the driver detects a stall (VALID: 31.25 * (1-128) -  4A max - rounds down)
-    #define X_MAX_VOLTAGE    127  // 0-255, Maximum effective voltage seen by stepper
-    #define X_CHAIN_POS       -1  // Position in SPI chain. (<=0 : Not in chain. 1 : Nearest MOSI)
+  #if AXIS_IS_L64XX(X)
+    #define X_MICROSTEPS       128  // Number of microsteps (VALID: 1, 2, 4, 8, 16, 32, 128) - L6474 max is 16
+    #define X_OVERCURRENT     2000  // (mA) Current where the driver detects an over current
+                                    //   L6470 & L6474 - VALID: 375 x (1 - 16) - 6A max - rounds down
+                                    //   POWERSTEP01: VALID: 1000 x (1 - 32) - 32A max - rounds down
+    #define X_STALLCURRENT    1500  // (mA) Current where the driver detects a stall (VALID: 31.25 * (1-128) -  4A max - rounds down)
+                                    //   L6470 & L6474 - VALID: 31.25 * (1-128) -  4A max - rounds down
+                                    //   POWERSTEP01: VALID: 200 x (1 - 32) - 6.4A max - rounds down
+                                    //   L6474 - STALLCURRENT setting is used to set the nominal (TVAL) current
+    #define X_MAX_VOLTAGE      127  // 0-255, Maximum effective voltage seen by stepper - not used by L6474
+    #define X_CHAIN_POS         -1  // Position in SPI chain, 0=Not in chain, 1=Nearest MOSI
+    #define X_SLEW_RATE          1  // 0-3, Slew 0 is slowest, 3 is fastest
   #endif
 
-  #if AXIS_DRIVER_TYPE_X2(L6470)
+  #if AXIS_IS_L64XX(X2)
     #define X2_MICROSTEPS      128
     #define X2_OVERCURRENT    2000
     #define X2_STALLCURRENT   1500
     #define X2_MAX_VOLTAGE     127
     #define X2_CHAIN_POS        -1
+    #define X2_SLEW_RATE         1
   #endif
 
-  #if AXIS_DRIVER_TYPE_Y(L6470)
+  #if AXIS_IS_L64XX(Y)
     #define Y_MICROSTEPS       128
     #define Y_OVERCURRENT     2000
     #define Y_STALLCURRENT    1500
     #define Y_MAX_VOLTAGE      127
     #define Y_CHAIN_POS         -1
+    #define Y_SLEW_RATE          1
   #endif
 
-  #if AXIS_DRIVER_TYPE_Y2(L6470)
+  #if AXIS_IS_L64XX(Y2)
     #define Y2_MICROSTEPS      128
     #define Y2_OVERCURRENT    2000
     #define Y2_STALLCURRENT   1500
     #define Y2_MAX_VOLTAGE     127
     #define Y2_CHAIN_POS        -1
+    #define Y2_SLEW_RATE         1
   #endif
 
-  #if AXIS_DRIVER_TYPE_Z(L6470)
+  #if AXIS_IS_L64XX(Z)
     #define Z_MICROSTEPS       128
     #define Z_OVERCURRENT     2000
     #define Z_STALLCURRENT    1500
     #define Z_MAX_VOLTAGE      127
     #define Z_CHAIN_POS         -1
+    #define Z_SLEW_RATE          1
   #endif
 
-  #if AXIS_DRIVER_TYPE_Z2(L6470)
+  #if AXIS_IS_L64XX(Z2)
     #define Z2_MICROSTEPS      128
     #define Z2_OVERCURRENT    2000
     #define Z2_STALLCURRENT   1500
     #define Z2_MAX_VOLTAGE     127
     #define Z2_CHAIN_POS        -1
+    #define Z2_SLEW_RATE         1
   #endif
 
-  #if AXIS_DRIVER_TYPE_Z3(L6470)
+  #if AXIS_IS_L64XX(Z3)
     #define Z3_MICROSTEPS      128
     #define Z3_OVERCURRENT    2000
     #define Z3_STALLCURRENT   1500
     #define Z3_MAX_VOLTAGE     127
     #define Z3_CHAIN_POS        -1
+    #define Z3_SLEW_RATE         1
   #endif
 
-  #if AXIS_DRIVER_TYPE_E0(L6470)
+  #if AXIS_IS_L64XX(Z4)
+    #define Z4_MICROSTEPS      128
+    #define Z4_OVERCURRENT    2000
+    #define Z4_STALLCURRENT   1500
+    #define Z4_MAX_VOLTAGE     127
+    #define Z4_CHAIN_POS        -1
+    #define Z4_SLEW_RATE         1
+  #endif
+
+  #if AXIS_IS_L64XX(E0)
     #define E0_MICROSTEPS      128
     #define E0_OVERCURRENT    2000
     #define E0_STALLCURRENT   1500
     #define E0_MAX_VOLTAGE     127
     #define E0_CHAIN_POS        -1
+    #define E0_SLEW_RATE         1
   #endif
 
-  #if AXIS_DRIVER_TYPE_E1(L6470)
+  #if AXIS_IS_L64XX(E1)
     #define E1_MICROSTEPS      128
     #define E1_OVERCURRENT    2000
     #define E1_STALLCURRENT   1500
     #define E1_MAX_VOLTAGE     127
     #define E1_CHAIN_POS        -1
+    #define E1_SLEW_RATE         1
   #endif
 
-  #if AXIS_DRIVER_TYPE_E2(L6470)
+  #if AXIS_IS_L64XX(E2)
     #define E2_MICROSTEPS      128
     #define E2_OVERCURRENT    2000
     #define E2_STALLCURRENT   1500
     #define E2_MAX_VOLTAGE     127
     #define E2_CHAIN_POS        -1
+    #define E2_SLEW_RATE         1
   #endif
 
-  #if AXIS_DRIVER_TYPE_E3(L6470)
+  #if AXIS_IS_L64XX(E3)
     #define E3_MICROSTEPS      128
     #define E3_OVERCURRENT    2000
     #define E3_STALLCURRENT   1500
     #define E3_MAX_VOLTAGE     127
     #define E3_CHAIN_POS        -1
+    #define E3_SLEW_RATE         1
   #endif
 
-  #if AXIS_DRIVER_TYPE_E4(L6470)
+  #if AXIS_IS_L64XX(E4)
     #define E4_MICROSTEPS      128
     #define E4_OVERCURRENT    2000
     #define E4_STALLCURRENT   1500
     #define E4_MAX_VOLTAGE     127
     #define E4_CHAIN_POS        -1
+    #define E4_SLEW_RATE         1
   #endif
 
-  #if AXIS_DRIVER_TYPE_E5(L6470)
+  #if AXIS_IS_L64XX(E5)
     #define E5_MICROSTEPS      128
     #define E5_OVERCURRENT    2000
     #define E5_STALLCURRENT   1500
     #define E5_MAX_VOLTAGE     127
     #define E5_CHAIN_POS        -1
+    #define E5_SLEW_RATE         1
+  #endif
+
+  #if AXIS_IS_L64XX(E6)
+    #define E6_MICROSTEPS      128
+    #define E6_OVERCURRENT    2000
+    #define E6_STALLCURRENT   1500
+    #define E6_MAX_VOLTAGE     127
+    #define E6_CHAIN_POS        -1
+    #define E6_SLEW_RATE         1
+  #endif
+
+  #if AXIS_IS_L64XX(E7)
+    #define E7_MICROSTEPS      128
+    #define E7_OVERCURRENT    2000
+    #define E7_STALLCURRENT   1500
+    #define E7_MAX_VOLTAGE     127
+    #define E7_CHAIN_POS        -1
+    #define E7_SLEW_RATE         1
   #endif
 
   /**
@@ -2311,7 +2504,7 @@
    *         I not present or I0 or I1 - X, Y, Z or E0
    *         I2 - X2, Y2, Z2 or E1
    *         I3 - Z3 or E3
-   *         I4 - E4
+   *         I4 - Z4 or E4
    *         I5 - E5
    * M916 - Increase drive level until get thermal warning
    * M917 - Find minimum current thresholds
@@ -2325,7 +2518,15 @@
     //#define L6470_STOP_ON_ERROR
   #endif
 
-#endif // L6470
+#endif // HAS_L64XX
+
+// @section i2cbus
+
+//
+// I2C Master ID for LPC176x LCD and Digital Current control
+// Does not apply to other peripherals based on the Wire library.
+//
+//#define I2C_MASTER_ID  1  // Set a value from 0 to 2
 
 /**
  * TWI/I2C BUS
@@ -2355,10 +2556,10 @@
  * echo:i2c-reply: from:99 bytes:5 data:hello
  */
 
-// @section i2cbus
-
 //#define EXPERIMENTAL_I2CBUS
-#define I2C_SLAVE_ADDRESS  0 // Set a value from 8 to 127 to act as a slave
+#if ENABLED(EXPERIMENTAL_I2CBUS)
+  #define I2C_SLAVE_ADDRESS  0  // Set a value from 8 to 127 to act as a slave
+#endif
 
 // @section extras
 
@@ -2387,6 +2588,20 @@
 
   // Duration to hold the switch or keep CHDK_PIN high
   //#define PHOTO_SWITCH_MS   50 // (ms) (M240 D)
+
+  /**
+   * PHOTO_PULSES_US may need adjustment depending on board and camera model.
+   * Pin must be running at 48.4kHz.
+   * Be sure to use a PHOTOGRAPH_PIN which can rise and fall quick enough.
+   * (e.g., MKS SBase temp sensor pin was too slow, so used P1.23 on J8.)
+   *
+   *  Example pulse data for Nikon: https://bit.ly/2FKD0Aq
+   *                     IR Wiring: https://git.io/JvJf7
+   */
+  //#define PHOTO_PULSES_US { 2000, 27850, 400, 1580, 400, 3580, 400 }  // (µs) Durations for each 48.4kHz oscillation
+  #ifdef PHOTO_PULSES_US
+    #define PHOTO_PULSE_DELAY_US 13 // (µs) Approximate duration of each HIGH and LOW pulse in the oscillation
+  #endif
 #endif
 
 /**
@@ -2726,7 +2941,11 @@
   #define JOY_Z_PIN   12  // RAMPS: Suggested pin A12 on AUX2
   #define JOY_EN_PIN  44  // RAMPS: Suggested pin D44 on AUX2
 
-  // Use M119 to find reasonable values after connecting your hardware:
+  //#define INVERT_JOY_X  // Enable if X direction is reversed
+  //#define INVERT_JOY_Y  // Enable if Y direction is reversed
+  //#define INVERT_JOY_Z  // Enable if Z direction is reversed
+
+  // Use M119 with JOYSTICK_DEBUG to find reasonable values after connecting:
   #define JOY_X_LIMITS { 5600, 8190-100, 8190+100, 10800 } // min, deadzone start, deadzone end, max
   #define JOY_Y_LIMITS { 5600, 8250-100, 8250+100, 11000 }
   #define JOY_Z_LIMITS { 4800, 8080-100, 8080+100, 11550 }
@@ -2781,12 +3000,15 @@
 /**
  * WiFi Support (Espressif ESP32 WiFi)
  */
-//#define WIFISUPPORT
-#if ENABLED(WIFISUPPORT)
+//#define WIFISUPPORT         // Marlin embedded WiFi managenent
+//#define ESP3D_WIFISUPPORT   // ESP3D Library WiFi management (https://github.com/luc-github/ESP3DLib)
+
+#if EITHER(WIFISUPPORT, ESP3D_WIFISUPPORT)
   #define WIFI_SSID "Wifi SSID"
   #define WIFI_PWD  "Wifi Password"
-  //#define WEBSUPPORT        // Start a webserver with auto-discovery
-  //#define OTASUPPORT        // Support over-the-air firmware updates
+  //#define WEBSUPPORT          // Start a webserver (which may include auto-discovery)
+  //#define OTASUPPORT          // Support over-the-air firmware updates
+  //#define WIFI_CUSTOM_COMMAND // Accept feature config commands (e.g., WiFi ESP3D) from the host
 #endif
 
 /**
@@ -2858,9 +3080,14 @@
 
 // @section develop
 
-/**
- * M43 - display pin status, watch pins for changes, watch endstops & toggle LED, Z servo probe test, toggle pins
- */
+//
+// M100 Free Memory Watcher to debug memory usage
+//
+//#define M100_FREE_MEMORY_WATCHER
+
+//
+// M43 - display pin status, toggle pins, watch pins, watch endstops & toggle LED, test servo probe
+//
 //#define PINS_DEBUGGING
 
 // Enable Marlin dev mode which adds some special commands

Marlin/Makefile

@@ -188,7 +188,7 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1109)
 else ifeq ($(HARDWARE_MOTHERBOARD),1110)
 # zrib V2.0 control board (Chinese knock off RAMPS replica)
 else ifeq ($(HARDWARE_MOTHERBOARD),1111)
-# Bigtreetech or BIQU KFB2.0
+# BigTreeTech or BIQU KFB2.0
 else ifeq ($(HARDWARE_MOTHERBOARD),1112)
 # Felix 2.0+ Electronics Board (RAMPS like)
 else ifeq ($(HARDWARE_MOTHERBOARD),1113)

Marlin/Version.h

@@ -28,7 +28,7 @@
 /**
  * Marlin release version identifier
  */
-//#define SHORT_BUILD_VERSION "2.0.0.1"
+//#define SHORT_BUILD_VERSION "2.0.2.1"
 
 /**
  * Verbose version identifier which should contain a reference to the location
@@ -41,7 +41,7 @@
  * 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 "2020-01-27"
 
 /**
  * Defines a generic printer name to be output to the LCD after booting Marlin.

Marlin/src/HAL/HAL_AVR/HAL.h

@@ -91,24 +91,37 @@ typedef int8_t pin_t;
   #define NUM_SERIAL 1
 #else
   #if !WITHIN(SERIAL_PORT, -1, 3)
-    #error "SERIAL_PORT must be from -1 to 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"
+      #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"
+      #error "SERIAL_PORT_2 must be different than SERIAL_PORT. Please update your configuration."
     #endif
-    #define NUM_SERIAL 2
     #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
 // ------------------------
@@ -345,9 +358,9 @@ void TIMER0_COMPB_vect_bottom()
 
 // ADC
 #ifdef DIDR2
-  #define HAL_ANALOG_SELECT(pin) do{ if (pin < 8) SBI(DIDR0, pin); else SBI(DIDR2, pin & 0x07); }while(0)
+  #define HAL_ANALOG_SELECT(ind) do{ if (ind < 8) SBI(DIDR0, ind); else SBI(DIDR2, ind & 0x07); }while(0)
 #else
-  #define HAL_ANALOG_SELECT(pin) do{ SBI(DIDR0, pin); }while(0)
+  #define HAL_ANALOG_SELECT(ind) SBI(DIDR0, ind);
 #endif
 
 inline void HAL_adc_init() {
@@ -358,11 +371,11 @@ inline void HAL_adc_init() {
   #endif
 }
 
-#define SET_ADMUX_ADCSRA(pin) ADMUX = _BV(REFS0) | (pin & 0x07); SBI(ADCSRA, ADSC)
+#define SET_ADMUX_ADCSRA(ch) ADMUX = _BV(REFS0) | (ch & 0x07); SBI(ADCSRA, ADSC)
 #ifdef MUX5
-  #define HAL_START_ADC(pin) if (pin > 7) ADCSRB = _BV(MUX5); else ADCSRB = 0; SET_ADMUX_ADCSRA(pin)
+  #define HAL_START_ADC(ch) if (ch > 7) ADCSRB = _BV(MUX5); else ADCSRB = 0; SET_ADMUX_ADCSRA(ch)
 #else
-  #define HAL_START_ADC(pin) ADCSRB = 0; SET_ADMUX_ADCSRA(pin)
+  #define HAL_START_ADC(ch) ADCSRB = 0; SET_ADMUX_ADCSRA(ch)
 #endif
 
 #define HAL_ADC_RESOLUTION 10

Marlin/src/HAL/HAL_AVR/MarlinSerial.cpp

@@ -41,7 +41,7 @@
 #if !defined(USBCON) && (defined(UBRRH) || defined(UBRR0H) || defined(UBRR1H) || defined(UBRR2H) || defined(UBRR3H))
 
   #include "MarlinSerial.h"
-  #include "../../Marlin.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 };
@@ -757,6 +757,33 @@
 
 #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;

Marlin/src/HAL/HAL_AVR/MarlinSerial.h

@@ -217,6 +217,9 @@
       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
 
       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; }
@@ -292,6 +295,23 @@
   extern MarlinSerial<MarlinInternalSerialCfg<INTERNAL_SERIAL_PORT>> internalSerial;
 #endif
 
+#ifdef DGUS_SERIAL_PORT
+  template <uint8_t serial>
+  struct MarlinInternalSerialCfg {
+    static constexpr int PORT               = serial;
+    static constexpr unsigned int RX_SIZE   = 128;
+    static constexpr unsigned int TX_SIZE   = 48;
+    static constexpr bool XONOFF            = false;
+    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;
+  };
+
+  extern MarlinSerial<MarlinInternalSerialCfg<DGUS_SERIAL_PORT>> internalDgusSerial;
+#endif
+
 // Use the UART for Bluetooth in AT90USB configurations
 #if defined(USBCON) && ENABLED(BLUETOOTH)
   extern HardwareSerial bluetoothSerial;

Marlin/src/HAL/HAL_AVR/endstop_interrupts.h

@@ -232,6 +232,22 @@ void setup_endstop_interrupts() {
       pciSetup(Z3_MIN_PIN);
     #endif
   #endif
+  #if HAS_Z4_MAX
+    #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");
+      pciSetup(Z4_MAX_PIN);
+    #endif
+  #endif
+  #if HAS_Z4_MIN
+    #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");
+      pciSetup(Z4_MIN_PIN);
+    #endif
+  #endif
   #if HAS_Z_MIN_PROBE_PIN
     #if (digitalPinToInterrupt(Z_MIN_PROBE_PIN) != NOT_AN_INTERRUPT)
       _ATTACH(Z_MIN_PROBE_PIN);

Marlin/src/HAL/HAL_AVR/fastio.h

@@ -279,14 +279,25 @@ enum ClockSource2 : char {
  */
 
 // 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) (P == CONTROLLER_FAN_PIN || 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 == CHAMBER_AUTO_FAN_PIN)
+  #define PWM_CHK_FAN_B(P) (_PWM_CHK_FAN_B(P) || P == CONTROLLER_FAN_PIN)
 #else
-  #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 == CHAMBER_AUTO_FAN_PIN)
+  #define PWM_CHK_FAN_B(P) _PWM_CHK_FAN_B(P)
 #endif
 
-#if ANY_PIN(FAN, FAN1, FAN2)
-  #if PIN_EXISTS(FAN2)
+#if ANY_PIN(FAN, FAN1, FAN2, FAN3, FAN4, FAN5, FAN6, FAN7)
+  #if PIN_EXISTS(FAN7)
+    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN || P == FAN3_PIN || P == FAN4_PIN || P == FAN5_PIN || P == FAN6_PIN || P == FAN7_PIN)
+  #elif PIN_EXISTS(FAN6)
+    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN || P == FAN3_PIN || P == FAN4_PIN || P == FAN5_PIN || P == FAN6_PIN)
+  #elif PIN_EXISTS(FAN5)
+    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN || P == FAN3_PIN || P == FAN4_PIN || P == FAN5_PIN)
+  #elif PIN_EXISTS(FAN4)
+    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN || P == FAN3_PIN || P == FAN4_PIN)
+  #elif PIN_EXISTS(FAN3)
+    #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN || P == FAN3_PIN)
+  #elif PIN_EXISTS(FAN2)
     #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN || P == FAN2_PIN)
   #elif PIN_EXISTS(FAN1)
     #define PWM_CHK_FAN_A(P) (P == FAN0_PIN || P == FAN1_PIN)

Marlin/src/HAL/HAL_AVR/inc/SanityCheck.h

@@ -39,7 +39,7 @@
  * 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"
+  #error "USE_OCR2A_AS_TOP does not apply to devices with a single output TIMER2"
 #endif
 
 /**
@@ -59,3 +59,7 @@
 #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

Marlin/src/HAL/HAL_AVR/pinsDebug.h

@@ -26,7 +26,10 @@
 
 #define NUMBER_PINS_TOTAL NUM_DIGITAL_PINS
 
+#define AVR_ATmega2560_FAMILY_PLUS_70 MB(BQ_ZUM_MEGA_3D, MIGHTYBOARD_REVE, MINIRAMBO, SCOOVO_X9H)
+
 #if AVR_AT90USB1286_FAMILY
+
   // Working with Teensyduino extension so need to re-define some things
   #include "pinsDebug_Teensyduino.h"
   // Can't use the "digitalPinToPort" function from the Teensyduino type IDEs
@@ -35,7 +38,9 @@
   #define digitalPinToBitMask_DEBUG(p) digitalPinToBitMask(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
+
   #include "pinsDebug_plus_70.h"
   #define digitalPinToTimer_DEBUG(p) digitalPinToTimer_plus_70(p)
   #define digitalPinToBitMask_DEBUG(p) digitalPinToBitMask_plus_70(p)
@@ -43,11 +48,13 @@
   bool GET_PINMODE(int8_t pin) {return *portModeRegister(digitalPinToPort_DEBUG(pin)) & digitalPinToBitMask_DEBUG(pin); }
 
 #else
+
   #define digitalPinToTimer_DEBUG(p) digitalPinToTimer(p)
   #define digitalPinToBitMask_DEBUG(p) digitalPinToBitMask(p)
   #define digitalPinToPort_DEBUG(p) digitalPinToPort(p)
   bool GET_PINMODE(int8_t pin) {return *portModeRegister(digitalPinToPort_DEBUG(pin)) & digitalPinToBitMask_DEBUG(pin); }
   #define GET_ARRAY_PIN(p) pgm_read_byte(&pin_array[p].pin)
+
 #endif
 
 #define VALID_PIN(pin) (pin >= 0 && pin < NUM_DIGITAL_PINS ? 1 : 0)
@@ -224,11 +231,10 @@ static void err_is_interrupt()   { SERIAL_ECHOPGM("   compare interrupt enabled"
 static void err_prob_interrupt() { SERIAL_ECHOPGM("   overflow interrupt enabled"); }
 static void print_is_also_tied() { SERIAL_ECHOPGM(" is also tied to this pin"); SERIAL_ECHO_SP(14); }
 
-void com_print(uint8_t N, uint8_t Z) {
+inline void com_print(const uint8_t N, const uint8_t Z) {
   const uint8_t *TCCRA = (uint8_t*)TCCR_A(N);
   SERIAL_ECHOPGM("    COM");
-  SERIAL_CHAR('0' + N);
-  SERIAL_CHAR('A' + Z);
+  SERIAL_CHAR('0' + N, Z);
   SERIAL_ECHOPAIR(": ", int((*TCCRA >> (6 - Z * 2)) & 0x03));
 }
 
@@ -240,8 +246,7 @@ void timer_prefix(uint8_t T, char L, uint8_t N) {  // T - timer    L - pwm  N -
   if (N == 4) WGM |= ((*TCCRB & _BV(WGM_3)) >> 1);
 
   SERIAL_ECHOPGM("    TIMER");
-  SERIAL_CHAR(T + '0');
-  SERIAL_CHAR(L);
+  SERIAL_CHAR(T + '0', L);
   SERIAL_ECHO_SP(3);
 
   if (N == 3) {

Marlin/src/HAL/HAL_AVR/watchdog.cpp

@@ -28,7 +28,7 @@
 
 #include "watchdog.h"
 
-#include "../../Marlin.h"
+#include "../../MarlinCore.h"
 
 // Initialize watchdog with 8s timeout, if possible. Otherwise, make it 4s.
 void watchdog_init() {

Marlin/src/HAL/HAL_DUE/HAL.cpp

@@ -94,8 +94,8 @@ int freeMemory() {
 // ADC
 // ------------------------
 
-void HAL_adc_start_conversion(const uint8_t adc_pin) {
-  HAL_adc_result = analogRead(adc_pin);
+void HAL_adc_start_conversion(const uint8_t ch) {
+  HAL_adc_result = analogRead(ch);
 }
 
 uint16_t HAL_adc_get_result() {

Marlin/src/HAL/HAL_DUE/HAL.h

@@ -56,8 +56,7 @@
 #ifdef SERIAL_PORT_2
   #if SERIAL_PORT_2 == SERIAL_PORT
     #error "SERIAL_PORT_2 must be different from SERIAL_PORT. Please update your configuration."
-  #endif
-  #if SERIAL_PORT_2 == -1
+  #elif SERIAL_PORT_2 == -1
     #define MYSERIAL1 customizedSerial2
   #elif SERIAL_PORT_2 == 0
     #define MYSERIAL1 Serial
@@ -75,6 +74,27 @@
   #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"
 
@@ -128,16 +148,16 @@ extern uint16_t HAL_adc_result;     // result of last ADC conversion
   #define analogInputToDigitalPin(p) ((p < 12u) ? (p) + 54u : -1)
 #endif
 
-#define HAL_ANALOG_SELECT(pin)
+#define HAL_ANALOG_SELECT(ch)
 
 inline void HAL_adc_init() {}//todo
 
-#define HAL_START_ADC(pin)  HAL_adc_start_conversion(pin)
+#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 adc_pin);
+void HAL_adc_start_conversion(const uint8_t ch);
 uint16_t HAL_adc_get_result();
 
 //

Marlin/src/HAL/HAL_DUE/HAL_SPI.cpp

@@ -240,7 +240,7 @@
   }
 
   // all the others
-  static uint32_t spiDelayCyclesX4 = (F_CPU) / 1000000; // 4uS => 125khz
+  static uint32_t spiDelayCyclesX4 = (F_CPU) / 1000000; // 4µs => 125khz
 
   static uint8_t spiTransferX(uint8_t b) { // using Mode 0
     int bits = 8;

Marlin/src/HAL/HAL_DUE/MarlinSerial.cpp

@@ -31,7 +31,7 @@
 
 #include "MarlinSerial.h"
 #include "InterruptVectors.h"
-#include "../../Marlin.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 };

Marlin/src/HAL/HAL_DUE/dogm/u8g_com_HAL_DUE_shared_hw_spi.cpp

@@ -63,7 +63,7 @@
 
 #include <U8glib.h>
 
-#include "../../../Marlin.h"
+#include "../../../MarlinCore.h"
 
 void spiBegin();
 void spiInit(uint8_t spiRate);

Marlin/src/HAL/HAL_DUE/endstop_interrupts.h

@@ -77,6 +77,12 @@ void setup_endstop_interrupts() {
   #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

Marlin/src/HAL/HAL_DUE/inc/SanityCheck.h

@@ -55,3 +55,7 @@
 #if ENABLED(FAST_PWM_FAN)
   #error "FAST_PWM_FAN is not yet implemented for this platform."
 #endif
+
+#if TMC_HAS_SW_SERIAL
+  #error "TMC220x Software Serial is not supported on this platform."
+#endif

Marlin/src/HAL/HAL_DUE/usb/uotghs_device_due.c

@@ -1479,7 +1479,7 @@ static void udd_ctrl_in_sent(void)
 	// The IN data don't must be written in endpoint 0 DPRAM during
 	// a next setup reception in same endpoint 0 DPRAM.
 	// Thereby, an OUT ZLP reception must check before IN data write
-	// and if no OUT ZLP is recevied the data must be written quickly (800us)
+	// and if no OUT ZLP is received the data must be written quickly (800µs)
 	// before an eventually ZLP OUT and SETUP reception
 	flags = cpu_irq_save();
 	if (Is_udd_out_received(0)) {

Marlin/src/HAL/HAL_DUE/watchdog.cpp

@@ -23,7 +23,7 @@
 #ifdef ARDUINO_ARCH_SAM
 
 #include "../../inc/MarlinConfig.h"
-#include "../../Marlin.h"
+#include "../../MarlinCore.h"
 #include "watchdog.h"
 
 // Override Arduino runtime to either config or disable the watchdog

Marlin/src/HAL/HAL_ESP32/HAL.cpp

@@ -30,10 +30,6 @@
 
 #include "../../inc/MarlinConfigPre.h"
 
-#if EITHER(EEPROM_SETTINGS, WEBSUPPORT)
-  #include "spiffs.h"
-#endif
-
 #if ENABLED(WIFISUPPORT)
   #include <ESPAsyncWebServer.h>
   #include "wifi.h"
@@ -41,6 +37,7 @@
     #include "ota.h"
   #endif
   #if ENABLED(WEBSUPPORT)
+    #include "spiffs.h"
     #include "web.h"
   #endif
 #endif
@@ -78,21 +75,32 @@ volatile int numPWMUsed = 0,
 // Public functions
 // ------------------------
 
-void HAL_init() {
-  i2s_init();
-}
+#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
+
+void HAL_init() { i2s_init(); }
 
 void HAL_init_board() {
-  #if EITHER(EEPROM_SETTINGS, WEBSUPPORT)
-    spiffs_init();
-  #endif
 
-  #if ENABLED(WIFISUPPORT)
+  #if ENABLED(ESP3D_WIFISUPPORT)
+    esp3dlib.init();
+  #elif ENABLED(WIFISUPPORT)
     wifi_init();
     #if ENABLED(OTASUPPORT)
       OTA_init();
     #endif
     #if ENABLED(WEBSUPPORT)
+      spiffs_init();
       web_init();
     #endif
     server.begin();
@@ -100,9 +108,12 @@ void HAL_init_board() {
 }
 
 void HAL_idletask() {
-  #if ENABLED(OTASUPPORT)
+  #if BOTH(WIFISUPPORT, OTASUPPORT)
     OTA_handle();
   #endif
+  #if ENABLED(ESP3D_WIFISUPPORT)
+    esp3dlib.idletask();
+  #endif
 }
 
 void HAL_clear_reset_source() { }
@@ -183,7 +194,7 @@ void HAL_adc_init() {
   }
 }
 
-void HAL_adc_start_conversion(uint8_t adc_pin) {
+void HAL_adc_start_conversion(const uint8_t adc_pin) {
   const adc1_channel_t chan = get_channel(adc_pin);
   uint32_t mv;
   esp_adc_cal_get_voltage((adc_channel_t)chan, &characteristics[attenuations[chan]], &mv);

Marlin/src/HAL/HAL_ESP32/HAL.h

@@ -36,7 +36,14 @@
 
 #include "timers.h"
 
-#include "WebSocketSerial.h"
+#if ENABLED(WIFISUPPORT)
+  #include "WebSocketSerial.h"
+#endif
+
+#if ENABLED(ESP3D_WIFISUPPORT)
+  #include "esp3dlib.h"
+#endif
+
 #include "FlushableHardwareSerial.h"
 
 // ------------------------
@@ -47,9 +54,13 @@ extern portMUX_TYPE spinlock;
 
 #define MYSERIAL0 flushableSerial
 
-#if ENABLED(WIFISUPPORT)
+#if EITHER(WIFISUPPORT, ESP3D_WIFISUPPORT)
+  #if ENABLED(ESP3D_WIFISUPPORT)
+    #define MYSERIAL1 Serial2Socket
+  #else
+    #define MYSERIAL1 webSocketSerial
+  #endif
   #define NUM_SERIAL 2
-  #define MYSERIAL1 webSocketSerial
 #else
   #define NUM_SERIAL 1
 #endif
@@ -60,7 +71,6 @@ extern portMUX_TYPE spinlock;
 #define ENABLE_ISRS()  if (spinlock.owner != portMUX_FREE_VAL) portEXIT_CRITICAL(&spinlock)
 #define DISABLE_ISRS() portENTER_CRITICAL(&spinlock)
 
-
 // Fix bug in pgm_read_ptr
 #undef pgm_read_ptr
 #define pgm_read_ptr(addr) (*(addr))
@@ -115,7 +125,7 @@ void HAL_adc_init();
 #define HAL_READ_ADC()      HAL_adc_result
 #define HAL_ADC_READY()     true
 
-void HAL_adc_start_conversion(uint8_t adc_pin);
+void HAL_adc_start_conversion(const uint8_t adc_pin);
 
 #define GET_PIN_MAP_PIN(index) index
 #define GET_PIN_MAP_INDEX(pin) pin
@@ -127,3 +137,44 @@ void HAL_adc_start_conversion(uint8_t adc_pin);
 void HAL_idletask();
 void HAL_init();
 void HAL_init_board();
+
+//
+// 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) );
+    }
+  }
+
+}

Marlin/src/HAL/HAL_ESP32/Servo.cpp

@@ -37,7 +37,7 @@ Servo::Servo() {
 
 int8_t Servo::attach(const int inPin) {
   if (channel >= CHANNEL_MAX_NUM) return -1;
-  if (pin > 0) pin = inPin;
+  if (inPin > 0) pin = inPin;
 
   ledcSetup(channel, 50, 16); // channel X, 50 Hz, 16-bit depth
   ledcAttachPin(pin, channel);

Marlin/src/HAL/HAL_ESP32/WebSocketSerial.h

@@ -25,14 +25,16 @@
 
 #include <Stream.h>
 
-#ifndef RX_BUFFER_SIZE
-  #define RX_BUFFER_SIZE 128
-#endif
 #ifndef TX_BUFFER_SIZE
   #define TX_BUFFER_SIZE 32
 #endif
-#if TX_BUFFER_SIZE <= 0
-  #error "TX_BUFFER_SIZE is required for the WebSocket."
+#if ENABLED(WIFISUPPORT)
+  #ifndef RX_BUFFER_SIZE
+    #define RX_BUFFER_SIZE 128
+  #endif
+  #if TX_BUFFER_SIZE <= 0
+    #error "TX_BUFFER_SIZE is required for the WebSocket."
+  #endif
 #endif
 
 typedef uint16_t ring_buffer_pos_t;

Marlin/src/HAL/HAL_ESP32/endstop_interrupts.h

@@ -72,6 +72,12 @@ void setup_endstop_interrupts() {
   #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

Marlin/src/HAL/HAL_ESP32/i2s.cpp

@@ -177,7 +177,7 @@ int i2s_init() {
    *
    *   fwclk = fbclk / 32
    *
-   *   for fwclk = 250kHz (4uS pulse time)
+   *   for fwclk = 250kHz (4µS pulse time)
    *      N = 10
    *      M = 20
    */

Marlin/src/HAL/HAL_ESP32/inc/SanityCheck.h

@@ -28,3 +28,11 @@
 #if ENABLED(FAST_PWM_FAN)
   #error "FAST_PWM_FAN is not yet implemented for this platform."
 #endif
+
+#if TMC_HAS_SW_SERIAL
+  #error "TMC220x Software Serial is not supported on this platform."
+#endif
+
+#if BOTH(WIFISUPPORT, ESP3D_WIFISUPPORT)
+  #error "Only enable one WiFi option, either WIFISUPPORT or ESP3D_WIFISUPPORT."
+#endif

Marlin/src/HAL/HAL_ESP32/ota.cpp

@@ -21,7 +21,7 @@
 
 #include "../../inc/MarlinConfigPre.h"
 
-#if ENABLED(OTASUPPORT)
+#if BOTH(WIFISUPPORT, OTASUPPORT)
 
 #include <WiFi.h>
 #include <ESPmDNS.h>
@@ -67,6 +67,5 @@ void OTA_handle() {
   ArduinoOTA.handle();
 }
 
-#endif // OTASUPPORT
-
+#endif // WIFISUPPORT && OTASUPPORT
 #endif // ARDUINO_ARCH_ESP32

Marlin/src/HAL/HAL_ESP32/persistent_store_impl.cpp

@@ -0,0 +1,63 @@
+/**
+ * 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_ESP32
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(EEPROM_SETTINGS) && DISABLED(FLASH_EEPROM_EMULATION)
+
+#include "../shared/persistent_store_api.h"
+#include "EEPROM.h"
+
+#define EEPROM_SIZE 4096
+
+bool PersistentStore::access_start() {
+  return EEPROM.begin(EEPROM_SIZE);
+}
+
+bool PersistentStore::access_finish() {
+  EEPROM.end();
+  return true;
+}
+
+bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+  for (size_t i = 0; i < size; i++) {
+    EEPROM.write(pos++, value[i]);
+    crc16(crc, &value[i], 1);
+  }
+  return false;
+}
+
+bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+  for (size_t i = 0; i < size; i++) {
+    uint8_t c = EEPROM.read(pos++);
+    if (writing) value[i] = c;
+    crc16(crc, &c, 1);
+  }
+  return false;
+}
+
+size_t PersistentStore::capacity() { return EEPROM_SIZE; }
+
+#endif // EEPROM_SETTINGS
+#endif // ARDUINO_ARCH_ESP32

Marlin/src/HAL/HAL_ESP32/persistent_store_spiffs.cpp

@@ -1,106 +0,0 @@
-/**
- * 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_ESP32
-
-#include "../../inc/MarlinConfig.h"
-
-#if ENABLED(EEPROM_SETTINGS) && DISABLED(FLASH_EEPROM_EMULATION)
-
-#include "../shared/persistent_store_api.h"
-
-#include <SPIFFS.h>
-#include <FS.h>
-#include "spiffs.h"
-
-#define HAL_ESP32_EEPROM_SIZE 4096
-#define HAL_ESP32_EEPROM_FILE_PATH "/eeprom.dat"
-
-File eeprom_file;
-
-bool PersistentStore::access_start() {
-  if (spiffs_initialized) {
-    eeprom_file = SPIFFS.open(HAL_ESP32_EEPROM_FILE_PATH, "r+");
-
-    size_t file_size = eeprom_file.size();
-    if (file_size < HAL_ESP32_EEPROM_SIZE) {
-      SERIAL_ECHO_MSG("SPIFFS EEPROM settings file " HAL_ESP32_EEPROM_FILE_PATH " is too small or did not exist, expanding.");
-      SERIAL_ECHO_START(); SERIAL_ECHOLNPAIR(" file size: ", file_size, ", required size: ", HAL_ESP32_EEPROM_SIZE);
-
-      // mode r+ does not allow to expand the file (at least on ESP32 SPIFFS9, so we close, reopen "a", append, close, reopen "r+"
-      eeprom_file.close();
-
-      eeprom_file = SPIFFS.open(HAL_ESP32_EEPROM_FILE_PATH, "a");
-      for (size_t i = eeprom_file.size(); i < HAL_ESP32_EEPROM_SIZE; i++)
-        eeprom_file.write(0xFF);
-      eeprom_file.close();
-
-      eeprom_file = SPIFFS.open(HAL_ESP32_EEPROM_FILE_PATH, "r+");
-      file_size = eeprom_file.size();
-      if (file_size < HAL_ESP32_EEPROM_SIZE) {
-        SERIAL_ERROR_MSG("Failed to expand " HAL_ESP32_EEPROM_FILE_PATH " to required size. SPIFFS partition full?");
-        SERIAL_ERROR_START(); SERIAL_ECHOLNPAIR(" file size: ", file_size, ", required size: ", HAL_ESP32_EEPROM_SIZE);
-        SERIAL_ERROR_START(); SERIAL_ECHOLNPAIR(" SPIFFS used bytes: ", SPIFFS.usedBytes(), ", total bytes: ", SPIFFS.totalBytes());
-      }
-    }
-    return true;
-  }
-  return false;
-}
-
-bool PersistentStore::access_finish() {
-  eeprom_file.close();
-  return true;
-}
-
-bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
-  if (!eeprom_file.seek(pos)) return true; // return true for any error
-  if (eeprom_file.write(value, size) != size) return true;
-
-  crc16(crc, value, size);
-  pos += size;
-
-  return false;
-}
-
-bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
-  if (!eeprom_file.seek(pos)) return true; // return true for any error
-
-  if (writing) {
-    if (eeprom_file.read(value, size) != size) return true;
-    crc16(crc, value, size);
-  }
-  else {
-    uint8_t tmp[size];
-    if (eeprom_file.read(tmp, size) != size) return true;
-    crc16(crc, tmp, size);
-  }
-
-  pos += size;
-
-  return false;
-}
-
-size_t PersistentStore::capacity() { return HAL_ESP32_EEPROM_SIZE; }
-
-#endif // EEPROM_SETTINGS
-#endif // ARDUINO_ARCH_ESP32

Marlin/src/HAL/HAL_ESP32/spiffs.cpp

@@ -24,7 +24,7 @@
 
 #include "../../inc/MarlinConfigPre.h"
 
-#if EITHER(WEBSUPPORT, EEPROM_SETTINGS)
+#if BOTH(WIFISUPPORT, WEBSUPPORT)
 
 #include "../../core/serial.h"
 
@@ -40,5 +40,5 @@ void spiffs_init() {
     SERIAL_ERROR_MSG("SPIFFS mount failed");
 }
 
-#endif // WEBSUPPORT
+#endif // WIFISUPPORT && WEBSUPPORT
 #endif // ARDUINO_ARCH_ESP32

Marlin/src/HAL/HAL_ESP32/timers.h

@@ -47,7 +47,7 @@ typedef uint64_t hal_timer_t;
 
 #if ENABLED(I2S_STEPPER_STREAM)
   #define STEPPER_TIMER_PRESCALE     1
-  #define STEPPER_TIMER_RATE         250000                           // 250khz, 4us pulses of i2s word clock
+  #define STEPPER_TIMER_RATE         250000                           // 250khz, 4µs pulses of i2s word clock
   #define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs // wrong would be 0.25
 #else
   #define STEPPER_TIMER_PRESCALE     40

Marlin/src/HAL/HAL_ESP32/watchdog.h

@@ -21,8 +21,18 @@
  */
 #pragma once
 
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+    esp_err_t esp_task_wdt_reset();
+
+#ifdef __cplusplus
+  }
+#endif
+
 // Initialize watchdog with a 4 second interrupt time
 void watchdog_init();
 
 // Reset watchdog.
-inline void HAL_watchdog_refresh() {}
+inline void HAL_watchdog_refresh() { esp_task_wdt_reset(); }

Marlin/src/HAL/HAL_ESP32/web.cpp

@@ -22,13 +22,12 @@
 
 #ifdef ARDUINO_ARCH_ESP32
 
-#include <SPIFFS.h>
-#undef DISABLED  // esp32-hal-gpio.h
-
 #include "../../inc/MarlinConfigPre.h"
 
-#if ENABLED(WEBSUPPORT)
+#if BOTH(WIFISUPPORT, WEBSUPPORT)
 
+#undef DISABLED  // esp32-hal-gpio.h
+#include <SPIFFS.h>
 #include "wifi.h"
 
 AsyncEventSource events("/events"); // event source (Server-Sent events)
@@ -43,5 +42,5 @@ void web_init() {
   server.onNotFound(onNotFound);
 }
 
-#endif // WEBSUPPORT
+#endif // WIFISUPPORT && WEBSUPPORT
 #endif // ARDUINO_ARCH_ESP32

Marlin/src/HAL/HAL_LINUX/HAL.cpp

@@ -55,7 +55,7 @@ void HAL_adc_init() {
 
 }
 
-void HAL_adc_enable_channel(int ch) {
+void HAL_adc_enable_channel(const uint8_t ch) {
 
 }
 

Marlin/src/HAL/HAL_LINUX/HAL.h

@@ -87,15 +87,15 @@ int freeMemory();
 #pragma GCC diagnostic pop
 
 // ADC
-#define HAL_ANALOG_SELECT(pin) HAL_adc_enable_channel(pin)
-#define HAL_START_ADC(pin)     HAL_adc_start_conversion(pin)
-#define HAL_ADC_RESOLUTION     10
-#define HAL_READ_ADC()         HAL_adc_get_result()
-#define HAL_ADC_READY()        true
+#define HAL_ANALOG_SELECT(ch) HAL_adc_enable_channel(ch)
+#define HAL_START_ADC(ch)     HAL_adc_start_conversion(ch)
+#define HAL_ADC_RESOLUTION    10
+#define HAL_READ_ADC()        HAL_adc_get_result()
+#define HAL_ADC_READY()       true
 
 void HAL_adc_init();
-void HAL_adc_enable_channel(int pin);
-void HAL_adc_start_conversion(const uint8_t adc_pin);
+void HAL_adc_enable_channel(const uint8_t ch);
+void HAL_adc_start_conversion(const uint8_t ch);
 uint16_t HAL_adc_get_result();
 
 // Reset source

Marlin/src/HAL/HAL_LINUX/inc/SanityCheck.h

@@ -33,3 +33,7 @@
 #if ENABLED(FAST_PWM_FAN)
   #error "FAST_PWM_FAN is not yet implemented for this platform."
 #endif
+
+#if TMC_HAS_SW_SERIAL
+  #error "TMC220x Software Serial is not supported on this platform."
+#endif

Marlin/src/HAL/HAL_LPC1768/HAL.h

@@ -61,10 +61,6 @@ extern "C" volatile uint32_t _millis;
   #define ST7920_DELAY_3 DELAY_NS(750)
 #endif
 
-#if !WITHIN(SERIAL_PORT, -1, 3)
-  #error "SERIAL_PORT must be from -1 to 3"
-#endif
-
 #if SERIAL_PORT == -1
   #define MYSERIAL0 UsbSerial
 #elif SERIAL_PORT == 0
@@ -75,16 +71,14 @@ extern "C" volatile uint32_t _millis;
   #define MYSERIAL0 MSerial2
 #elif SERIAL_PORT == 3
   #define MYSERIAL0 MSerial3
+#else
+  #error "SERIAL_PORT must be from -1 to 3. Please update your configuration."
 #endif
 
 #ifdef SERIAL_PORT_2
-  #if !WITHIN(SERIAL_PORT_2, -1, 3)
-    #error "SERIAL_PORT_2 must be from -1 to 3"
-  #elif SERIAL_PORT_2 == SERIAL_PORT
-    #error "SERIAL_PORT_2 must be different than SERIAL_PORT"
-  #endif
-  #define NUM_SERIAL 2
-  #if SERIAL_PORT_2 == -1
+  #if SERIAL_PORT_2 == SERIAL_PORT
+    #error "SERIAL_PORT_2 must be different than SERIAL_PORT. Please update your configuration."
+  #elif SERIAL_PORT_2 == -1
     #define MYSERIAL1 UsbSerial
   #elif SERIAL_PORT_2 == 0
     #define MYSERIAL1 MSerial
@@ -94,11 +88,34 @@ extern "C" volatile uint32_t _millis;
     #define MYSERIAL1 MSerial2
   #elif SERIAL_PORT_2 == 3
     #define MYSERIAL1 MSerial3
+  #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 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."
+  #elif DGUS_SERIAL_PORT == -1
+    #define DGUS_SERIAL UsbSerial
+  #elif DGUS_SERIAL_PORT == 0
+    #define DGUS_SERIAL MSerial
+  #elif DGUS_SERIAL_PORT == 1
+    #define DGUS_SERIAL MSerial1
+  #elif DGUS_SERIAL_PORT == 2
+    #define DGUS_SERIAL MSerial2
+  #elif DGUS_SERIAL_PORT == 3
+    #define DGUS_SERIAL MSerial3
+  #else
+    #error "DGUS_SERIAL_PORT must be from -1 to 3. Please update your configuration."
+  #endif
+#endif
+
 //
 // Interrupts
 //

Marlin/src/HAL/HAL_LPC1768/endstop_interrupts.h

@@ -93,7 +93,7 @@ void setup_endstop_interrupts() {
     _ATTACH(Z2_MIN_PIN);
   #endif
   #if HAS_Z3_MAX
-    #if !LPC1768_PIN_INTERRUPT_M(Z3_MIN_PIN)
+    #if !LPC1768_PIN_INTERRUPT_M(Z3_MAX_PIN)
       #error "Z3_MIN_PIN is not INTERRUPT-capable."
     #endif
     _ATTACH(Z3_MAX_PIN);
@@ -104,6 +104,18 @@ void setup_endstop_interrupts() {
     #endif
     _ATTACH(Z3_MIN_PIN);
   #endif
+  #if HAS_Z4_MAX
+    #if !LPC1768_PIN_INTERRUPT_M(Z4_MAX_PIN)
+      #error "Z4_MIN_PIN is not INTERRUPT-capable."
+    #endif
+    _ATTACH(Z4_MAX_PIN);
+  #endif
+  #if HAS_Z4_MIN
+    #if !LPC1768_PIN_INTERRUPT_M(Z4_MIN_PIN)
+      #error "Z4_MIN_PIN is not INTERRUPT-capable."
+    #endif
+    _ATTACH(Z4_MIN_PIN);
+  #endif
   #if HAS_Z_MIN_PROBE_PIN
     #if !LPC1768_PIN_INTERRUPT_M(Z_MIN_PROBE_PIN)
       #error "Z_MIN_PROBE_PIN is not INTERRUPT-capable."

Marlin/src/HAL/HAL_LPC1768/inc/SanityCheck.h

@@ -46,6 +46,10 @@
   #error "TEMP_4_PIN must be defined using the Pn_nn or Pn_nn_An format. (See the included pins files)."
 #elif _OLD_TEMP_PIN(TEMP_5)
   #error "TEMP_5_PIN must be defined using the Pn_nn or Pn_nn_An format. (See the included pins files)."
+#elif _OLD_TEMP_PIN(TEMP_6)
+  #error "TEMP_6_PIN must be defined using the Pn_nn or Pn_nn_An format. (See the included pins files)."
+#elif _OLD_TEMP_PIN(TEMP_7)
+  #error "TEMP_7_PIN must be defined using the Pn_nn or Pn_nn_An format. (See the included pins files)."
 #endif
 #undef _OLD_TEMP_PIN
 
@@ -68,3 +72,7 @@
 #if IS_RE_ARM_BOARD && ENABLED(REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER) && HAS_DRIVER(TMC2130) && DISABLED(TMC_USE_SW_SPI)
   #error "Re-ARM with REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER and TMC2130 require TMC_USE_SW_SPI"
 #endif
+
+#if ENABLED(BAUD_RATE_GCODE)
+  #error "BAUD_RATE_GCODE is not yet supported on LPC176x."
+#endif

Marlin/src/HAL/HAL_LPC1768/include/digipot_mcp4451_I2C_routines.c

@@ -20,8 +20,10 @@
  *
  */
 
-// adapted from  I2C/master/master.c example
-//   https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
+/**
+ * digipot_mcp4451_I2C_routines.c
+ * Adapted from https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
+ */
 
 #ifdef TARGET_LPC1768
 
@@ -29,12 +31,12 @@
 
 #if MB(MKS_SBASE)
 
-#include "digipot_mcp4451_I2C_routines.h"
-
 #ifdef __cplusplus
   extern "C" {
 #endif
 
+#include "digipot_mcp4451_I2C_routines.h"
+
 // These two routines are exact copies of the lpc17xx_i2c.c routines.  Couldn't link to
 // to the lpc17xx_i2c.c routines so had to copy them into this file & rename them.
 
@@ -60,7 +62,6 @@ static void _I2C_Stop(LPC_I2C_TypeDef *I2Cx) {
   I2Cx->I2CONCLR = I2C_I2CONCLR_SIC;
 }
 
-PINSEL_CFG_Type PinCfg;
 I2C_M_SETUP_Type transferMCfg;
 
 #define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK)
@@ -89,41 +90,6 @@ uint8_t digipot_mcp4451_start(uint8_t sla) {  // send slave address and write bi
   return 1;
 }
 
-void digipot_mcp4451_init() {
-  /**
-   * Init I2C pin connect
-   */
-  PinCfg.OpenDrain = 0;
-  PinCfg.Pinmode = 0;
-  #if USEDI2CDEV_M == 0
-    PinCfg.Funcnum = 1;
-    PinCfg.Pinnum = 27;
-    PinCfg.Portnum = 0;
-    PINSEL_ConfigPin(&PinCfg); // SDA0 / D57  AUX-1
-    PinCfg.Pinnum = 28;
-    PINSEL_ConfigPin(&PinCfg); // SCL0 / D58  AUX-1
-  #elif USEDI2CDEV_M == 1
-    PinCfg.Funcnum = 3;
-    PinCfg.Pinnum = 0;
-    PinCfg.Portnum = 0;
-    PINSEL_ConfigPin(&PinCfg);  // SDA1 / D20 SCA
-    PinCfg.Pinnum = 1;
-    PINSEL_ConfigPin(&PinCfg);  // SCL1 / D21 SCL
-  #elif USEDI2CDEV_M == 2
-    PinCfg.Funcnum = 2;
-    PinCfg.Pinnum = 10;
-    PinCfg.Portnum = 0;
-    PINSEL_ConfigPin(&PinCfg); // SDA2 / D38  X_ENABLE_PIN
-    PinCfg.Pinnum = 11;
-    PINSEL_ConfigPin(&PinCfg); // SCL2 / D55  X_DIR_PIN
-  #endif
-  // Initialize I2C peripheral
-  I2C_Init(I2CDEV_M, 400000);  // hardwired to 400KHz bit rate, 100KHz is the other option
-
-  // Enable Master I2C operation
-  I2C_Cmd(I2CDEV_M, I2C_MASTER_MODE, ENABLE);
-}
-
 uint8_t digipot_mcp4451_send_byte(uint8_t data) {
   LPC_I2C1->I2DAT = data & I2C_I2DAT_BITMASK; // transmit data
   LPC_I2C1->I2CONSET = I2C_I2CONSET_AA;

Marlin/src/HAL/HAL_LPC1768/include/digipot_mcp4451_I2C_routines.h

@@ -21,20 +21,10 @@
  */
 #pragma once
 
-// adapted from  I2C/master/master.c example
-//   https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
-
-#define USEDI2CDEV_M  1  // use I2C1 controller
-
-#if USEDI2CDEV_M == 0
-  #define I2CDEV_M LPC_I2C0
-#elif USEDI2CDEV_M == 1
-  #define I2CDEV_M LPC_I2C1
-#elif USEDI2CDEV_M == 2
-  #define I2CDEV_M LPC_I2C2
-#else
-  #error "Master I2C device not defined!"
-#endif
+/**
+ * digipot_mcp4451_I2C_routines.h
+ * Adapted from https://www-users.cs.york.ac.uk/~pcc/MCP/HAPR-Course-web/CMSIS/examples/html/master_8c_source.html
+ */
 
 #ifdef __cplusplus
   extern "C" {
@@ -43,9 +33,9 @@
 #include <lpc17xx_i2c.h>
 #include <lpc17xx_pinsel.h>
 #include <lpc17xx_libcfg_default.h>
+#include "i2c_util.h"
 
 uint8_t digipot_mcp4451_start(uint8_t sla);
-void digipot_mcp4451_init();
 uint8_t digipot_mcp4451_send_byte(uint8_t data);
 
 #ifdef __cplusplus

Marlin/src/HAL/HAL_LPC1768/include/i2c_util.c

@@ -0,0 +1,70 @@
+/**
+ * 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/>.
+ *
+ */
+
+/**
+ * HAL_LPC1768/include/i2c_util.c
+ */
+
+#ifdef TARGET_LPC1768
+
+#include "i2c_util.h"
+
+#define U8G_I2C_OPT_FAST 16  // from u8g.h
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+void configure_i2c(const uint8_t clock_option) {
+  /**
+   * Init I2C pin connect
+   */
+  PINSEL_CFG_Type PinCfg;
+  PinCfg.OpenDrain = 0;
+  PinCfg.Pinmode = 0;
+  PinCfg.Portnum = 0;
+  #if I2C_MASTER_ID == 0
+    PinCfg.Funcnum = 1;
+    PinCfg.Pinnum = 27;     // SDA0 / D57  AUX-1 ... SCL0 / D58  AUX-1
+  #elif I2C_MASTER_ID == 1
+    PinCfg.Funcnum = 3;
+    PinCfg.Pinnum = 0;      // SDA1 / D20 SCA ... SCL1 / D21 SCL
+  #elif I2C_MASTER_ID == 2
+    PinCfg.Funcnum = 2;
+    PinCfg.Pinnum = 10;     // SDA2 / D38  X_ENABLE_PIN ... SCL2 / D55  X_DIR_PIN
+  #endif
+  PINSEL_ConfigPin(&PinCfg);
+  PinCfg.Pinnum += 1;
+  PINSEL_ConfigPin(&PinCfg);
+
+  // Initialize I2C peripheral
+  I2C_Init(I2CDEV_M, (clock_option & U8G_I2C_OPT_FAST) ? 400000: 100000);  // LCD data rates
+
+  // Enable Master I2C operation
+  I2C_Cmd(I2CDEV_M, I2C_MASTER_MODE, ENABLE);
+}
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif // TARGET_LPC1768

Marlin/src/HAL/HAL_LPC1768/include/i2c_util.h

@@ -0,0 +1,56 @@
+/**
+ * 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
+
+/**
+ * HAL_LPC1768/include/i2c_util.h
+ */
+
+#include "../../../inc/MarlinConfigPre.h"
+
+#ifndef I2C_MASTER_ID
+  #define I2C_MASTER_ID 1
+#endif
+
+#if I2C_MASTER_ID == 0
+  #define I2CDEV_M LPC_I2C0
+#elif I2C_MASTER_ID == 1
+  #define I2CDEV_M LPC_I2C1
+#elif I2C_MASTER_ID == 2
+  #define I2CDEV_M LPC_I2C2
+#else
+  #error "Master I2C device not defined!"
+#endif
+
+#include <lpc17xx_i2c.h>
+#include <lpc17xx_pinsel.h>
+#include <lpc17xx_libcfg_default.h>
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+void configure_i2c(const uint8_t clock_option);
+
+#ifdef __cplusplus
+  }
+#endif

Marlin/src/HAL/HAL_LPC1768/u8g/LCD_I2C_routines.cpp

@@ -25,25 +25,21 @@
 
 #ifdef TARGET_LPC1768
 
+#include "../include/i2c_util.h"
+#include "../../../core/millis_t.h"
+
 extern int millis();
 
 #ifdef __cplusplus
   extern "C" {
 #endif
 
-#include <lpc17xx_i2c.h>
-#include <lpc17xx_pinsel.h>
-#include <lpc17xx_libcfg_default.h>
-
-#include "../../../core/millis_t.h"
-
-
 //////////////////////////////////////////////////////////////////////////////////////
 
 // These two routines are exact copies of the lpc17xx_i2c.c routines.  Couldn't link to
 // to the lpc17xx_i2c.c routines so had to copy them into this file & rename them.
 
-static uint32_t _I2C_Start (LPC_I2C_TypeDef *I2Cx) {
+static uint32_t _I2C_Start(LPC_I2C_TypeDef *I2Cx) {
   // Reset STA, STO, SI
   I2Cx->I2CONCLR = I2C_I2CONCLR_SIC|I2C_I2CONCLR_STOC|I2C_I2CONCLR_STAC;
 
@@ -67,30 +63,16 @@ static void _I2C_Stop (LPC_I2C_TypeDef *I2Cx) {
 
 //////////////////////////////////////////////////////////////////////////////////////
 
-#define U8G_I2C_OPT_FAST 16  // from u8g.h
-
-#define USEDI2CDEV_M            1
-
 #define I2CDEV_S_ADDR   0x78  // from SSD1306  //actual address is 0x3C - shift left 1 with LSB set to 0 to indicate write
 
 #define BUFFER_SIZE                     0x1  // only do single byte transfers with LCDs
 
-#if (USEDI2CDEV_M == 0)
-  #define I2CDEV_M LPC_I2C0
-#elif (USEDI2CDEV_M == 1)
-  #define I2CDEV_M LPC_I2C1
-#elif (USEDI2CDEV_M == 2)
-  #define I2CDEV_M LPC_I2C2
-#else
-  #error "Master I2C device not defined!"
-#endif
-
-PINSEL_CFG_Type PinCfg;
 I2C_M_SETUP_Type transferMCfg;
 
 #define I2C_status (LPC_I2C1->I2STAT & I2C_STAT_CODE_BITMASK)
 
-uint8_t u8g_i2c_start(uint8_t sla) {  // send slave address and write bit
+// Send slave address and write bit
+uint8_t u8g_i2c_start(const uint8_t sla) {
   // Sometimes TX data ACK or NAK status is returned.  That mean the start state didn't
   // happen which means only the value of the slave address was send.  Keep looping until
   // the slave address and write bit are actually sent.
@@ -114,44 +96,9 @@ uint8_t u8g_i2c_start(uint8_t sla) {  // send slave address and write bit
   return 1;
 }
 
-void u8g_i2c_init(uint8_t clock_option) {
-
-  /**
-   * Init I2C pin connect
-   */
-  PinCfg.OpenDrain = 0;
-  PinCfg.Pinmode = 0;
-  #if ((USEDI2CDEV_M == 0))
-    PinCfg.Funcnum = 1;
-    PinCfg.Pinnum = 27;
-    PinCfg.Portnum = 0;
-    PINSEL_ConfigPin(&PinCfg); // SDA0 / D57  AUX-1
-    PinCfg.Pinnum = 28;
-    PINSEL_ConfigPin(&PinCfg); // SCL0 / D58  AUX-1
-  #endif
-  #if ((USEDI2CDEV_M == 1))
-    PinCfg.Funcnum = 3;
-    PinCfg.Pinnum = 0;
-    PinCfg.Portnum = 0;
-    PINSEL_ConfigPin(&PinCfg);  // SDA1 / D20 SCA
-    PinCfg.Pinnum = 1;
-    PINSEL_ConfigPin(&PinCfg);  // SCL1 / D21 SCL
-  #endif
-  #if ((USEDI2CDEV_M == 2))
-    PinCfg.Funcnum = 2;
-    PinCfg.Pinnum = 10;
-    PinCfg.Portnum = 0;
-    PINSEL_ConfigPin(&PinCfg); // SDA2 / D38  X_ENABLE_PIN
-    PinCfg.Pinnum = 11;
-    PINSEL_ConfigPin(&PinCfg); // SCL2 / D55  X_DIR_PIN
-  #endif
-  // Initialize I2C peripheral
-  I2C_Init(I2CDEV_M, (clock_option & U8G_I2C_OPT_FAST) ? 400000: 100000);  // LCD data rates
-
-  // Enable Master I2C operation
-  I2C_Cmd(I2CDEV_M, I2C_MASTER_MODE, ENABLE);
-
-  u8g_i2c_start(0); // send slave address and write bit
+void u8g_i2c_init(const uint8_t clock_option) {
+  configure_i2c(clock_option);
+  u8g_i2c_start(0); // Send slave address and write bit
 }
 
 uint8_t u8g_i2c_send_byte(uint8_t data) {

Marlin/src/HAL/HAL_LPC1768/u8g/LCD_I2C_routines.h

@@ -21,8 +21,8 @@
  */
 #pragma once
 
-void u8g_i2c_init(uint8_t options);
-uint8_t u8g_i2c_wait(uint8_t mask, uint8_t pos);
+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();

Marlin/src/HAL/HAL_LPC1768/u8g/LCD_delay.h

@@ -26,8 +26,8 @@
  *
  * These are based on the LPC1768 routines.
  *
- * Couldn't just call exact copies because the overhead resulted in the
- * one microsecond delay being about 4uS.
+ * Couldn't just call exact copies because the overhead
+ * results in a one microsecond delay taking about 4µS.
  */
 
 #ifdef __cplusplus

Marlin/src/HAL/HAL_LPC1768/u8g/u8g_com_HAL_LPC1768_ssd_hw_i2c.cpp

@@ -86,8 +86,6 @@
 #define I2C_CMD_MODE    0x000
 #define I2C_DATA_MODE   0x040
 
-//#define U8G_I2C_OPT_FAST 16
-
 uint8_t u8g_com_ssd_I2C_start_sequence(u8g_t *u8g) {
   /* are we requested to set the a0 state? */
   if (u8g->pin_list[U8G_PI_SET_A0] == 0) return 1;

Marlin/src/HAL/HAL_LPC1768/upload_extra_script.py

@@ -9,7 +9,9 @@ target_filename = "FIRMWARE.CUR"
 target_drive = "REARM"
 
 import os
+import getpass
 import platform
+
 current_OS = platform.system()
 Import("env")
 
@@ -77,28 +79,26 @@ try:
         upload_disk = 'Disk not found'
         target_file_found = False
         target_drive_found = False
-        medias = os.listdir('/media')  #
-        for media in medias:
-            drives = os.listdir('/media/' + media)  #
-            if target_drive in drives and target_file_found == False:  # set upload if not found target file yet
-                target_drive_found = True
-                upload_disk = '/media/' + media + '/' + target_drive + '/'
+        drives = os.listdir(os.path.join(os.sep, 'media', getpass.getuser()))
+        if target_drive in drives:  # If target drive is found, use it.
+            target_drive_found = True
+            upload_disk = os.path.join(os.sep, 'media', getpass.getuser(), target_drive) + os.sep
+        else:
             for drive in drives:
                 try:
-                    files = os.listdir('/media/' + media + '/' + drive)
+                    files = os.listdir(os.path.join(os.sep, 'media', getpass.getuser(), drive))
                 except:
                     continue
                 else:
                     if target_filename in files:
-                        if target_file_found == False:
-                            upload_disk = '/media/' + media + '/' + drive + '/'
-                            target_file_found = True
-
+                        upload_disk = os.path.join(os.sep, 'media', getpass.getuser(), drive) + os.sep
+                        target_file_found = True
+                        break
         #
         # set upload_port to drive if found
         #
 
-        if target_file_found == True or target_drive_found == True:
+        if target_file_found or target_drive_found:
             env.Replace(
                 UPLOAD_FLAGS="-P$UPLOAD_PORT",
                 UPLOAD_PORT=upload_disk

Marlin/src/HAL/HAL_LPC1768/watchdog.cpp

@@ -68,5 +68,4 @@ bool watchdog_timed_out() { return TEST(WDT_ReadTimeOutFlag(), 0); }
 void watchdog_clear_timeout_flag() { WDT_ClrTimeOutFlag(); }
 
 #endif // USE_WATCHDOG
-
 #endif // TARGET_LPC1768

Marlin/src/HAL/HAL_SAMD51/HAL.cpp

@@ -59,6 +59,21 @@
 #else
   #define GET_TEMP_5_ADC()          -1
 #endif
+#if HAS_TEMP_ADC_6
+  #define GET_TEMP_6_ADC()          PIN_TO_ADC(TEMP_6_PIN)
+#else
+  #define GET_TEMP_6_ADC()          -1
+#endif
+#if HAS_TEMP_ADC_7
+  #define GET_TEMP_7_ADC()          PIN_TO_ADC(TEMP_7_PIN)
+#else
+  #define GET_TEMP_7_ADC()          -1
+#endif
+#if HAS_TEMP_PROBE
+  #define GET_PROBE_ADC()           PIN_TO_ADC(TEMP_PROBE_PIN)
+#else
+  #define GET_PROBE_ADC()           -1
+#endif
 #if HAS_TEMP_ADC_BED
   #define GET_BED_ADC()             PIN_TO_ADC(TEMP_BED_PIN)
 #else
@@ -80,12 +95,15 @@
   #define GET_BUTTONS_ADC()         -1
 #endif
 
-#define IS_ADC_REQUIRED(n)      (GET_TEMP_0_ADC() == n || GET_TEMP_1_ADC() == n || GET_TEMP_2_ADC() == n      \
-                                 || GET_TEMP_3_ADC() == n || GET_TEMP_4_ADC() == n || GET_TEMP_5_ADC() == n   \
-                                 || GET_BED_ADC() == n                                                        \
-                                 || GET_CHAMBER_ADC() == n                                                    \
-                                 || GET_FILAMENT_WIDTH_ADC() == n                                             \
-                                 || GET_BUTTONS_ADC() == n)
+#define IS_ADC_REQUIRED(n) ( \
+     GET_TEMP_0_ADC() == n || GET_TEMP_1_ADC() == n || GET_TEMP_2_ADC() == n || GET_TEMP_3_ADC() == n \
+  || GET_TEMP_4_ADC() == n || GET_TEMP_5_ADC() == n || GET_TEMP_6_ADC() == n || GET_TEMP_7_ADC() == n \
+  || GET_PROBE_ADC() == n          \
+  || GET_BED_ADC() == n            \
+  || GET_CHAMBER_ADC() == n        \
+  || GET_FILAMENT_WIDTH_ADC() == n \
+  || GET_BUTTONS_ADC() == n        \
+)
 
 #define ADC0_IS_REQUIRED    IS_ADC_REQUIRED(0)
 #define ADC1_IS_REQUIRED    IS_ADC_REQUIRED(1)
@@ -145,6 +163,15 @@ uint16_t HAL_adc_result;
     #if GET_TEMP_5_ADC() == 0
       TEMP_5_PIN,
     #endif
+    #if GET_TEMP_6_ADC() == 0
+      TEMP_6_PIN,
+    #endif
+    #if GET_TEMP_7_ADC() == 0
+      TEMP_7_PIN,
+    #endif
+    #if GET_PROBE_ADC() == 0
+      TEMP_PROBE_PIN,
+    #endif
     #if GET_BED_ADC() == 0
       TEMP_BED_PIN,
     #endif
@@ -176,6 +203,15 @@ uint16_t HAL_adc_result;
     #if GET_TEMP_5_ADC() == 1
       TEMP_5_PIN,
     #endif
+    #if GET_TEMP_6_ADC() == 1
+      TEMP_6_PIN,
+    #endif
+    #if GET_TEMP_7_ADC() == 1
+      TEMP_7_PIN,
+    #endif
+    #if GET_PROBE_ADC() == 1
+      TEMP_PROBE_PIN,
+    #endif
     #if GET_BED_ADC() == 1
       TEMP_BED_PIN,
     #endif
@@ -215,6 +251,15 @@ uint16_t HAL_adc_result;
       #if GET_TEMP_5_ADC() == 0
         { PIN_TO_INPUTCTRL(TEMP_5_PIN) },
       #endif
+      #if GET_TEMP_6_ADC() == 0
+        { PIN_TO_INPUTCTRL(TEMP_6_PIN) },
+      #endif
+      #if GET_TEMP_7_ADC() == 0
+        { PIN_TO_INPUTCTRL(TEMP_7_PIN) },
+      #endif
+      #if GET_PROBE_ADC() == 0
+        { PIN_TO_INPUTCTRL(TEMP_PROBE_PIN) },
+      #endif
       #if GET_BED_ADC() == 0
         { PIN_TO_INPUTCTRL(TEMP_BED_PIN) },
       #endif
@@ -255,6 +300,15 @@ uint16_t HAL_adc_result;
       #if GET_TEMP_5_ADC() == 1
         { PIN_TO_INPUTCTRL(TEMP_5_PIN) },
       #endif
+      #if GET_TEMP_6_ADC() == 1
+        { PIN_TO_INPUTCTRL(TEMP_6_PIN) },
+      #endif
+      #if GET_TEMP_7_ADC() == 1
+        { PIN_TO_INPUTCTRL(TEMP_7_PIN) },
+      #endif
+      #if GET_PROBE_ADC() == 1
+        { PIN_TO_INPUTCTRL(TEMP_PROBE_PIN) },
+      #endif
       #if GET_BED_ADC() == 1
         { PIN_TO_INPUTCTRL(TEMP_BED_PIN) },
       #endif
@@ -426,7 +480,7 @@ void HAL_adc_init() {
     memset(HAL_adc_results, 0xFF, sizeof(HAL_adc_results));                 // Fill result with invalid values
 
     for (uint8_t pi = 0; pi < COUNT(adc_pins); ++pi)
-        pinPeripheral(adc_pins[pi], PIO_ANALOG);
+      pinPeripheral(adc_pins[pi], PIO_ANALOG);
 
     for (uint8_t ai = FIRST_ADC; ai <= LAST_ADC; ++ai) {
       Adc* adc = ((Adc*[])ADC_INSTS)[ai];
@@ -471,8 +525,4 @@ void HAL_adc_start_conversion(const uint8_t adc_pin) {
   HAL_adc_result = 0xFFFF;
 }
 
-uint16_t HAL_adc_get_result() {
-  return HAL_adc_result;
-}
-
 #endif // __SAMD51__

Marlin/src/HAL/HAL_SAMD51/HAL.h

@@ -33,11 +33,9 @@
   #include "MarlinSerial_AGCM4.h"
 
   // Serial ports
-  #if !WITHIN(SERIAL_PORT, -1, 3)
-    #error "SERIAL_PORT must be from -1 to 3"
-  #endif
 
   // MYSERIAL0 required before MarlinSerial includes!
+
   #if SERIAL_PORT == -1
     #define MYSERIAL0 Serial
   #elif SERIAL_PORT == 0
@@ -46,18 +44,16 @@
     #define MYSERIAL0 Serial2
   #elif SERIAL_PORT == 2
     #define MYSERIAL0 Serial3
-  #else
+  #elif SERIAL_PORT == 3
     #define MYSERIAL0 Serial4
+  #else
+    #error "SERIAL_PORT must be from -1 to 3. Please update your configuration."
   #endif
 
   #ifdef SERIAL_PORT_2
-    #if !WITHIN(SERIAL_PORT_2, -1, 3)
-      #error "SERIAL_PORT_2 must be from -1 to 3"
-    #elif SERIAL_PORT_2 == SERIAL_PORT
-      #error "SERIAL_PORT_2 must be different than SERIAL_PORT"
-    #endif
-    #define NUM_SERIAL 2
-    #if SERIAL_PORT_2 == -1
+    #if SERIAL_PORT_2 == SERIAL_PORT
+      #error "SERIAL_PORT_2 must be different than SERIAL_PORT. Please update your configuration."
+    #elif SERIAL_PORT_2 == -1
       #define MYSERIAL1 Serial
     #elif SERIAL_PORT_2 == 0
       #define MYSERIAL1 Serial1
@@ -65,13 +61,36 @@
       #define MYSERIAL1 Serial2
     #elif SERIAL_PORT_2 == 2
       #define MYSERIAL1 Serial3
-    #else
+    #elif SERIAL_PORT_2 == 3
       #define MYSERIAL1 Serial4
+    #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 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."
+    #elif DGUS_SERIAL_PORT == -1
+      #define DGUS_SERIAL Serial
+    #elif DGUS_SERIAL_PORT == 0
+      #define DGUS_SERIAL Serial1
+    #elif DGUS_SERIAL_PORT == 1
+      #define DGUS_SERIAL Serial2
+    #elif DGUS_SERIAL_PORT == 2
+      #define DGUS_SERIAL Serial3
+    #elif DGUS_SERIAL_PORT == 2
+      #define DGUS_SERIAL Serial4
+    #else
+      #error "DGUS_SERIAL_PORT must be from -1 to 3. Please update your configuration."
+    #endif
+  #endif
+
 #endif // ADAFRUIT_GRAND_CENTRAL_M4
 
 typedef int8_t pin_t;
@@ -116,7 +135,7 @@ void HAL_adc_init();
 #define HAL_ADC_READY()     true
 
 void HAL_adc_start_conversion(const uint8_t adc_pin);
-uint16_t HAL_adc_get_result();
+inline uint16_t HAL_adc_get_result() { return HAL_adc_result; }
 
 //
 // Pin Map

Marlin/src/HAL/HAL_SAMD51/endstop_interrupts.h

@@ -98,6 +98,16 @@
 #else
   #define MATCH_Z3_MIN_EILINE(P) false
 #endif
+#if HAS_Z4_MAX
+  #define MATCH_Z4_MAX_EILINE(P) MATCH_EILINE(P, Z4_MAX_PIN)
+#else
+  #define MATCH_Z4_MAX_EILINE(P) false
+#endif
+#if HAS_Z4_MIN
+  #define MATCH_Z4_MIN_EILINE(P) MATCH_EILINE(P, Z4_MIN_PIN)
+#else
+  #define MATCH_Z4_MIN_EILINE(P) false
+#endif
 #if HAS_Z_MIN_PROBE_PIN
   #define MATCH_Z_MIN_PROBE_EILINE(P)   MATCH_EILINE(P, Z_MIN_PROBE_PIN)
 #else
@@ -109,6 +119,7 @@
                                  && !MATCH_Z_MAX_EILINE(P) && !MATCH_Z_MIN_EILINE(P)    \
                                  && !MATCH_Z2_MAX_EILINE(P) && !MATCH_Z2_MIN_EILINE(P)  \
                                  && !MATCH_Z3_MAX_EILINE(P) && !MATCH_Z3_MIN_EILINE(P)  \
+                                 && !MATCH_Z4_MAX_EILINE(P) && !MATCH_Z4_MIN_EILINE(P)  \
                                  && !MATCH_Z_MIN_PROBE_EILINE(P))
 
 // One ISR for all EXT-Interrupts
@@ -117,67 +128,79 @@ void endstop_ISR() { endstops.update(); }
 void setup_endstop_interrupts() {
   #if HAS_X_MAX
     #if !AVAILABLE_EILINE(X_MAX_PIN)
-      static_assert(false, "X_MAX_PIN has no EXTINT line available.");
+      #error "X_MAX_PIN has no EXTINT line available."
     #endif
     attachInterrupt(X_MAX_PIN, endstop_ISR, CHANGE);
   #endif
   #if HAS_X_MIN
     #if !AVAILABLE_EILINE(X_MIN_PIN)
-      static_assert(false, "X_MIN_PIN has no EXTINT line available.");
+      #error "X_MIN_PIN has no EXTINT line available."
     #endif
     attachInterrupt(X_MIN_PIN, endstop_ISR, CHANGE);
   #endif
   #if HAS_Y_MAX
     #if !AVAILABLE_EILINE(Y_MAX_PIN)
-      static_assert(false, "Y_MAX_PIN has no EXTINT line available.");
+      #error "Y_MAX_PIN has no EXTINT line available."
     #endif
     attachInterrupt(Y_MAX_PIN, endstop_ISR, CHANGE);
   #endif
   #if HAS_Y_MIN
     #if !AVAILABLE_EILINE(Y_MIN_PIN)
-      static_assert(false, "Y_MIN_PIN has no EXTINT line available.");
+      #error "Y_MIN_PIN has no EXTINT line available."
     #endif
     attachInterrupt(Y_MIN_PIN, endstop_ISR, CHANGE);
   #endif
   #if HAS_Z_MAX
     #if !AVAILABLE_EILINE(Z_MAX_PIN)
-      static_assert(false, "Z_MAX_PIN has no EXTINT line available.");
+      #error "Z_MAX_PIN has no EXTINT line available."
     #endif
     attachInterrupt(Z_MAX_PIN, endstop_ISR, CHANGE);
   #endif
   #if HAS_Z_MIN
     #if !AVAILABLE_EILINE(Z_MIN_PIN)
-      static_assert(false, "Z_MIN_PIN has no EXTINT line available.");
+      #error "Z_MIN_PIN has no EXTINT line available."
     #endif
     attachInterrupt(Z_MIN_PIN, endstop_ISR, CHANGE);
   #endif
   #if HAS_Z2_MAX
     #if !AVAILABLE_EILINE(Z2_MAX_PIN)
-      static_assert(false, "Z2_MAX_PIN has no EXTINT line available.");
+      #error "Z2_MAX_PIN has no EXTINT line available."
     #endif
     attachInterrupt(Z2_MAX_PIN, endstop_ISR, CHANGE);
   #endif
   #if HAS_Z2_MIN
     #if !AVAILABLE_EILINE(Z2_MIN_PIN)
-      static_assert(false, "Z2_MIN_PIN has no EXTINT line available.");
+      #error "Z2_MIN_PIN has no EXTINT line available."
     #endif
     attachInterrupt(Z2_MIN_PIN, endstop_ISR, CHANGE);
   #endif
   #if HAS_Z3_MAX
     #if !AVAILABLE_EILINE(Z3_MAX_PIN)
-      static_assert(false, "Z3_MAX_PIN has no EXTINT line available.");
+      #error "Z3_MAX_PIN has no EXTINT line available."
     #endif
     attachInterrupt(Z3_MAX_PIN, endstop_ISR, CHANGE);
   #endif
   #if HAS_Z3_MIN
     #if !AVAILABLE_EILINE(Z3_MIN_PIN)
-      static_assert(false, "Z3_MIN_PIN has no EXTINT line available.");
+      #error "Z3_MIN_PIN has no EXTINT line available."
     #endif
     attachInterrupt(Z3_MIN_PIN, endstop_ISR, CHANGE);
   #endif
+  #if HAS_Z4_MAX
+    #if !AVAILABLE_EILINE(Z4_MAX_PIN)
+      #error "Z4_MAX_PIN has no EXTINT line available."
+    #endif
+    attachInterrupt(Z4_MAX_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Z4_MIN
+    #if !AVAILABLE_EILINE(Z4_MIN_PIN)
+      #error "Z4_MIN_PIN has no EXTINT line available."
+    #endif
+    attachInterrupt(Z4_MIN_PIN, endstop_ISR, CHANGE);
+  #endif
   #if HAS_Z_MIN_PROBE_PIN
     #if !AVAILABLE_EILINE(Z_MIN_PROBE_PIN)
-      static_assert(false, "Z_MIN_PROBE_PIN has no EXTINT line available.");
+      #error "Z_MIN_PROBE_PIN has no EXTINT line available."
     #endif
     attachInterrupt(Z_MIN_PROBE_PIN, endstop_ISR, CHANGE);
   #endif

Marlin/src/HAL/HAL_SAMD51/inc/SanityCheck.h

@@ -36,7 +36,7 @@
 #endif
 
 #if ENABLED(SDIO_SUPPORT)
-  #error "SDIO_SUPPORT is not supported."
+  #error "SDIO_SUPPORT is not supported on SAMD51."
 #endif
 
 #if ENABLED(FAST_PWM_FAN)
@@ -46,3 +46,7 @@
 #if ENABLED(EEPROM_SETTINGS) && NONE(SPI_EEPROM, I2C_EEPROM)
   #warning "Did you activate the SmartEEPROM? See https://github.com/GMagician/SAMD51-SmartEEprom-Activator"
 #endif
+
+#if TMC_HAS_SW_SERIAL
+  #error "TMC220x Software Serial is not supported on this platform."
+#endif

Marlin/src/HAL/HAL_STM32/HAL.cpp

@@ -28,13 +28,7 @@
 #include "../../inc/MarlinConfig.h"
 #include "../shared/Delay.h"
 
-#if (__cplusplus == 201703L) && defined(__has_include)
-  #define HAS_SWSERIAL __has_include(<SoftwareSerial.h>)
-#else
-  #define HAS_SWSERIAL HAS_TMC220x
-#endif
-
-#if HAS_SWSERIAL
+#if TMC_HAS_SW_SERIAL
   #include "SoftwareSerial.h"
 #endif
 
@@ -93,7 +87,7 @@ void HAL_init() {
   while (!LL_PWR_IsActiveFlag_BRR());
   #endif // EEPROM_EMULATED_SRAM
 
-  #if HAS_SWSERIAL
+  #if TMC_HAS_SW_SERIAL
     SoftwareSerial::setInterruptPriority(SWSERIAL_TIMER_IRQ_PRIO, 0);
   #endif
 }
@@ -101,11 +95,27 @@ void HAL_init() {
 void HAL_clear_reset_source() { __HAL_RCC_CLEAR_RESET_FLAGS(); }
 
 uint8_t HAL_get_reset_source() {
-  if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST) != RESET) return RST_WATCHDOG;
-  if (__HAL_RCC_GET_FLAG(RCC_FLAG_SFTRST) != RESET)  return RST_SOFTWARE;
-  if (__HAL_RCC_GET_FLAG(RCC_FLAG_PINRST) != RESET)  return RST_EXTERNAL;
-  if (__HAL_RCC_GET_FLAG(RCC_FLAG_PORRST) != RESET)  return RST_POWER_ON;
-  return 0;
+  return
+    #ifdef RCC_FLAG_IWDGRST // Some sources may not exist...
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST)  ? RST_WATCHDOG :
+    #endif
+    #ifdef RCC_FLAG_IWDG1RST
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_IWDG1RST) ? RST_WATCHDOG :
+    #endif
+    #ifdef RCC_FLAG_IWDG2RST
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_IWDG2RST) ? RST_WATCHDOG :
+    #endif
+    #ifdef RCC_FLAG_SFTRST
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_SFTRST)   ? RST_SOFTWARE :
+    #endif
+    #ifdef RCC_FLAG_PINRST
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_PINRST)   ? RST_EXTERNAL :
+    #endif
+    #ifdef RCC_FLAG_PORRST
+      RESET != __HAL_RCC_GET_FLAG(RCC_FLAG_PORRST)   ? RST_POWER_ON :
+    #endif
+    0
+  ;
 }
 
 void _delay_ms(const int delay_ms) { delay(delay_ms); }

Marlin/src/HAL/HAL_STM32/HAL.h

@@ -44,13 +44,8 @@
 // ------------------------
 
 #if SERIAL_PORT == 0
-  #error "Serial port 0 does not exist"
-#endif
-
-#if !WITHIN(SERIAL_PORT, -1, 6)
-  #error "SERIAL_PORT must be from -1 to 6"
-#endif
-#if SERIAL_PORT == -1
+  #error "SERIAL_PORT cannot be 0. (Port 0 does not exist.) Please update your configuration."
+#elif SERIAL_PORT == -1
   #define MYSERIAL0 SerialUSB
 #elif SERIAL_PORT == 1
   #define MYSERIAL0 Serial1
@@ -64,20 +59,17 @@
   #define MYSERIAL0 Serial5
 #elif SERIAL_PORT == 6
   #define MYSERIAL0 Serial6
+#else
+  #error "SERIAL_PORT must be from -1 to 6. Please update your configuration."
 #endif
 
 #ifdef SERIAL_PORT_2
-  #if SERIAL_PORT_2 == 0
-    #error "Serial port 0 does not exist"
-  #endif
-
-  #if !WITHIN(SERIAL_PORT_2, -1, 6)
-    #error "SERIAL_PORT_2 must be from -1 to 6"
-  #elif SERIAL_PORT_2 == SERIAL_PORT
-    #error "SERIAL_PORT_2 must be different than SERIAL_PORT"
-  #endif
   #define NUM_SERIAL 2
-  #if SERIAL_PORT_2 == -1
+  #if SERIAL_PORT_2 == 0
+    #error "SERIAL_PORT_2 cannot be 0. (Port 0 does not exist.) Please update your configuration."
+  #elif SERIAL_PORT_2 == SERIAL_PORT
+    #error "SERIAL_PORT_2 must be different than SERIAL_PORT. Please update your configuration."
+  #elif SERIAL_PORT_2 == -1
     #define MYSERIAL1 SerialUSB
   #elif SERIAL_PORT_2 == 1
     #define MYSERIAL1 Serial1
@@ -91,11 +83,41 @@
     #define MYSERIAL1 Serial5
   #elif SERIAL_PORT_2 == 6
     #define MYSERIAL1 Serial6
+  #else
+    #error "SERIAL_PORT_2 must be from -1 to 6. Please update your configuration."
   #endif
 #else
   #define NUM_SERIAL 1
 #endif
 
+#if HAS_DGUS_LCD
+  #if DGUS_SERIAL_PORT == 0
+    #error "DGUS_SERIAL_PORT cannot be 0. (Port 0 does not exist.) 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."
+  #elif DGUS_SERIAL_PORT == -1
+    #define DGUS_SERIAL SerialUSB
+  #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
+  #elif DGUS_SERIAL_PORT == 4
+    #define DGUS_SERIAL Serial4
+  #elif DGUS_SERIAL_PORT == 5
+    #define DGUS_SERIAL Serial5
+  #elif DGUS_SERIAL_PORT == 6
+    #define DGUS_SERIAL Serial6
+  #else
+    #error "DGUS_SERIAL_PORT must be from -1 to 6. Please update your configuration."
+  #endif
+
+  #define DGUS_SERIAL_GET_TX_BUFFER_FREE DGUS_SERIAL.availableForWrite
+#endif
+
 #include "timers.h"
 
 /**

Marlin/src/HAL/HAL_STM32/HAL_SPI.cpp

@@ -37,114 +37,193 @@ static SPISettings spiConfig;
 // ------------------------
 
 #if ENABLED(SOFTWARE_SPI)
+
   // ------------------------
   // Software SPI
   // ------------------------
-  #error "Software SPI not supported for STM32. Use Hardware SPI."
+
+  #include "../shared/Delay.h"
+
+  void spiBegin(void) {
+    OUT_WRITE(SS_PIN, HIGH);
+    OUT_WRITE(SCK_PIN, HIGH);
+    SET_INPUT(MISO_PIN);
+    OUT_WRITE(MOSI_PIN, HIGH);
+  }
+
+  static uint16_t delay_STM32_soft_spi;
+
+  void spiInit(uint8_t spiRate) {
+    // Use datarates Marlin uses
+    switch (spiRate) {
+      case SPI_FULL_SPEED:   delay_STM32_soft_spi =  125; break;  // desired: 8,000,000  actual: ~1.1M
+      case SPI_HALF_SPEED:   delay_STM32_soft_spi =  125; break;  // desired: 4,000,000  actual: ~1.1M
+      case SPI_QUARTER_SPEED:delay_STM32_soft_spi =  250; break;  // desired: 2,000,000  actual: ~890K
+      case SPI_EIGHTH_SPEED: delay_STM32_soft_spi =  500; break;  // desired: 1,000,000  actual: ~590K
+      case SPI_SPEED_5:      delay_STM32_soft_spi = 1000; break;  // desired:   500,000  actual: ~360K
+      case SPI_SPEED_6:      delay_STM32_soft_spi = 2000; break;  // desired:   250,000  actual: ~210K
+      default:               delay_STM32_soft_spi = 4000; break;  // desired:   125,000  actual: ~123K
+    }
+    SPI.begin();
+  }
+
+  // Begin SPI transaction, set clock, bit order, data mode
+  void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) { /* do nothing */ }
+
+  uint8_t HAL_SPI_STM32_SpiTransfer_Mode_3(uint8_t b) { // using Mode 3
+    for (uint8_t bits = 8; bits--;) {
+      WRITE(SCK_PIN, LOW);
+      WRITE(MOSI_PIN, b & 0x80);
+
+      DELAY_NS(delay_STM32_soft_spi);
+      WRITE(SCK_PIN, HIGH);
+      DELAY_NS(delay_STM32_soft_spi);
+
+      b <<= 1;        // little setup time
+      b |= (READ(MISO_PIN) != 0);
+    }
+    DELAY_NS(125);
+    return b;
+  }
+
+  // Soft SPI receive byte
+  uint8_t spiRec() {
+    DISABLE_ISRS();                                               // No interrupts during byte receive
+    const uint8_t data = HAL_SPI_STM32_SpiTransfer_Mode_3(0xFF);
+    ENABLE_ISRS();                                                // Enable interrupts
+    return data;
+  }
+
+  // Soft SPI read data
+  void spiRead(uint8_t *buf, uint16_t nbyte) {
+    for (uint16_t i = 0; i < nbyte; i++)
+      buf[i] = spiRec();
+  }
+
+  // Soft SPI send byte
+  void spiSend(uint8_t data) {
+    DISABLE_ISRS();                         // No interrupts during byte send
+    HAL_SPI_STM32_SpiTransfer_Mode_3(data); // Don't care what is received
+    ENABLE_ISRS();                          // Enable interrupts
+  }
+
+  // Soft SPI send block
+  void spiSendBlock(uint8_t token, const uint8_t *buf) {
+    spiSend(token);
+    for (uint16_t i = 0; i < 512; i++)
+      spiSend(buf[i]);
+  }
 
 #else
 
-// ------------------------
-// Hardware SPI
-// ------------------------
+  // ------------------------
+  // Hardware SPI
+  // ------------------------
 
-/**
- * VGPV SPI speed start and PCLK2/2, by default 108/2 = 54Mhz
- */
+  /**
+   * VGPV SPI speed start and PCLK2/2, by default 108/2 = 54Mhz
+   */
 
-/**
- * @brief  Begin SPI port setup
- *
- * @return Nothing
- *
- * @details Only configures SS pin since stm32duino creates and initialize the SPI object
- */
-void spiBegin() {
-  #if !PIN_EXISTS(SS)
-    #error "SS_PIN not defined!"
-  #endif
+  /**
+   * @brief  Begin SPI port setup
+   *
+   * @return Nothing
+   *
+   * @details Only configures SS pin since stm32duino creates and initialize the SPI object
+   */
+  void spiBegin() {
+    #if !PIN_EXISTS(SS)
+      #error "SS_PIN not defined!"
+    #endif
 
-  OUT_WRITE(SS_PIN, HIGH);
-}
-
-/** Configure SPI for specified SPI speed */
-void spiInit(uint8_t spiRate) {
-  // Use datarates Marlin uses
-  uint32_t clock;
-  switch (spiRate) {
-    case SPI_FULL_SPEED:    clock = 20000000; break; // 13.9mhz=20000000  6.75mhz=10000000  3.38mhz=5000000  .833mhz=1000000
-    case SPI_HALF_SPEED:    clock =  5000000; break;
-    case SPI_QUARTER_SPEED: clock =  2500000; break;
-    case SPI_EIGHTH_SPEED:  clock =  1250000; break;
-    case SPI_SPEED_5:       clock =   625000; break;
-    case SPI_SPEED_6:       clock =   300000; break;
-    default:
-      clock = 4000000; // Default from the SPI library
+    OUT_WRITE(SS_PIN, HIGH);
   }
-  spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0);
 
-  SPI.begin();
-}
+  // Configure SPI for specified SPI speed
+  void spiInit(uint8_t spiRate) {
+    // Use datarates Marlin uses
+    uint32_t clock;
+    switch (spiRate) {
+      case SPI_FULL_SPEED:    clock = 20000000; break; // 13.9mhz=20000000  6.75mhz=10000000  3.38mhz=5000000  .833mhz=1000000
+      case SPI_HALF_SPEED:    clock =  5000000; break;
+      case SPI_QUARTER_SPEED: clock =  2500000; break;
+      case SPI_EIGHTH_SPEED:  clock =  1250000; break;
+      case SPI_SPEED_5:       clock =   625000; break;
+      case SPI_SPEED_6:       clock =   300000; break;
+      default:
+        clock = 4000000; // Default from the SPI library
+    }
+    spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0);
 
-/**
- * @brief  Receives a single byte from the SPI port.
- *
- * @return Byte received
- *
- * @details
- */
-uint8_t spiRec() {
-  SPI.beginTransaction(spiConfig);
-  uint8_t returnByte = SPI.transfer(0xFF);
-  SPI.endTransaction();
-  return returnByte;
-}
+    #if ENABLED(CUSTOM_SPI_PINS)
+      SPI.setMISO(MISO_PIN);
+      SPI.setMOSI(MOSI_PIN);
+      SPI.setSCLK(SCK_PIN);
+      SPI.setSSEL(SS_PIN);
+    #endif
 
-/**
- * @brief  Receives a number of bytes from the SPI port to a buffer
- *
- * @param  buf   Pointer to starting address of buffer to write to.
- * @param  nbyte Number of bytes to receive.
- * @return Nothing
- *
- * @details Uses DMA
- */
-void spiRead(uint8_t* buf, uint16_t nbyte) {
-  if (nbyte == 0) return;
-  memset(buf, 0xFF, nbyte);
-  SPI.beginTransaction(spiConfig);
-  SPI.transfer(buf, nbyte);
-  SPI.endTransaction();
-}
+    SPI.begin();
+  }
 
-/**
- * @brief  Sends a single byte on SPI port
- *
- * @param  b Byte to send
- *
- * @details
- */
-void spiSend(uint8_t b) {
-  SPI.beginTransaction(spiConfig);
-  SPI.transfer(b);
-  SPI.endTransaction();
-}
+  /**
+   * @brief  Receives a single byte from the SPI port.
+   *
+   * @return Byte received
+   *
+   * @details
+   */
+  uint8_t spiRec() {
+    SPI.beginTransaction(spiConfig);
+    uint8_t returnByte = SPI.transfer(0xFF);
+    SPI.endTransaction();
+    return returnByte;
+  }
 
-/**
- * @brief  Write token and then write from 512 byte buffer to SPI (for SD card)
- *
- * @param  buf   Pointer with buffer start address
- * @return Nothing
- *
- * @details Use DMA
- */
-void spiSendBlock(uint8_t token, const uint8_t* buf) {
-  uint8_t rxBuf[512];
-  SPI.beginTransaction(spiConfig);
-  SPI.transfer(token);
-  SPI.transfer((uint8_t*)buf, &rxBuf, 512);
-  SPI.endTransaction();
-}
+  /**
+   * @brief  Receive a number of bytes from the SPI port to a buffer
+   *
+   * @param  buf   Pointer to starting address of buffer to write to.
+   * @param  nbyte Number of bytes to receive.
+   * @return Nothing
+   *
+   * @details Uses DMA
+   */
+  void spiRead(uint8_t* buf, uint16_t nbyte) {
+    if (nbyte == 0) return;
+    memset(buf, 0xFF, nbyte);
+    SPI.beginTransaction(spiConfig);
+    SPI.transfer(buf, nbyte);
+    SPI.endTransaction();
+  }
+
+  /**
+   * @brief  Send a single byte on SPI port
+   *
+   * @param  b Byte to send
+   *
+   * @details
+   */
+  void spiSend(uint8_t b) {
+    SPI.beginTransaction(spiConfig);
+    SPI.transfer(b);
+    SPI.endTransaction();
+  }
+
+  /**
+   * @brief  Write token and then write from 512 byte buffer to SPI (for SD card)
+   *
+   * @param  buf   Pointer with buffer start address
+   * @return Nothing
+   *
+   * @details Use DMA
+   */
+  void spiSendBlock(uint8_t token, const uint8_t* buf) {
+    uint8_t rxBuf[512];
+    SPI.beginTransaction(spiConfig);
+    SPI.transfer(token);
+    SPI.transfer((uint8_t*)buf, &rxBuf, 512);
+    SPI.endTransaction();
+  }
 
 #endif // SOFTWARE_SPI
 

Marlin/src/HAL/HAL_STM32/Servo.cpp

@@ -28,25 +28,30 @@
 
 #include "Servo.h"
 
-uint8_t servoPin[MAX_SERVOS] = { 0 };
+static uint_fast8_t servoCount = 0;
+constexpr millis_t servoDelay[] = SERVO_DELAY;
+static_assert(COUNT(servoDelay) == NUM_SERVOS, "SERVO_DELAY must be an array NUM_SERVOS long.");
+
+libServo::libServo()
+: delay(servoDelay[servoCount++])
+{}
 
 int8_t libServo::attach(const int pin) {
-  if (servoIndex >= MAX_SERVOS) return -1;
-  if (pin > 0) servoPin[servoIndex] = pin;
-  return super::attach(servoPin[servoIndex]);
+  if (servoCount >= MAX_SERVOS) return -1;
+  if (pin > 0) servo_pin = pin;
+  return super::attach(servo_pin);
 }
 
 int8_t libServo::attach(const int pin, const int min, const int max) {
-  if (pin > 0) servoPin[servoIndex] = pin;
-  return super::attach(servoPin[servoIndex], min, max);
+  if (servoCount >= MAX_SERVOS) return -1;
+  if (pin > 0) servo_pin = pin;
+  return super::attach(servo_pin, min, max);
 }
 
 void libServo::move(const int value) {
-  constexpr uint16_t servo_delay[] = SERVO_DELAY;
-  static_assert(COUNT(servo_delay) == NUM_SERVOS, "SERVO_DELAY must be an array NUM_SERVOS long.");
   if (attach(0) >= 0) {
     write(value);
-    safe_delay(servo_delay[servoIndex]);
+    safe_delay(delay);
     #if ENABLED(DEACTIVATE_SERVOS_AFTER_MOVE)
       detach();
     #endif

Marlin/src/HAL/HAL_STM32/Servo.h

@@ -27,11 +27,13 @@
 // Inherit and expand on the official library
 class libServo : public Servo {
   public:
+    libServo();
     int8_t attach(const int pin);
     int8_t attach(const int pin, const int min, const int max);
     void move(const int value);
   private:
     typedef Servo super;
-    uint16_t min_ticks, max_ticks;
-    uint8_t servoIndex;               // index into the channel data for this servo
+
+    int servo_pin = 0;
+    millis_t delay = 0;
 };

Marlin/src/HAL/HAL_STM32/SoftwareSerial.cpp

@@ -34,7 +34,7 @@
 //
 // Includes
 //
-#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+#if defined(PLATFORMIO) && defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
 
 #include "SoftwareSerial.h"
 #include "timers.h"

Marlin/src/HAL/HAL_STM32/endstop_interrupts.h

@@ -58,6 +58,12 @@ void setup_endstop_interrupts() {
   #if HAS_Z3_MIN
     attachInterrupt(Z3_MIN_PIN, endstop_ISR, CHANGE);
   #endif
+  #if HAS_Z4_MAX
+    attachInterrupt(Z4_MAX_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Z4_MIN
+    attachInterrupt(Z4_MIN_PIN, endstop_ISR, CHANGE);
+  #endif
   #if HAS_Z_MIN_PROBE_PIN
     attachInterrupt(Z_MIN_PROBE_PIN, endstop_ISR, CHANGE);
   #endif

Marlin/src/HAL/HAL_STM32/persistent_store_flash.cpp

@@ -0,0 +1,265 @@
+/**
+ * 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
+ * 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+
+#include "../../inc/MarlinConfig.h"
+
+#if BOTH(EEPROM_SETTINGS, FLASH_EEPROM_EMULATION)
+
+#include "../shared/persistent_store_api.h"
+
+
+// Only STM32F4 can support wear leveling at this time
+#ifndef STM32F4xx
+  #undef FLASH_EEPROM_LEVELING
+#endif
+
+/**
+ * The STM32 HAL supports chips that deal with "pages" and some with "sectors" and some that
+ * even have multiple "banks" of flash.
+ *
+ * This code is a bit of a mashup of
+ *   framework-arduinoststm32/cores/arduino/stm32/stm32_eeprom.c
+ *   hal/hal_lpc1768/persistent_store_flash.cpp
+ *
+ * This has only be written against those that use a single "sector" design.
+ *
+ * Those that deal with "pages" could be made to work. Looking at the STM32F07 for example, there are
+ * 128 "pages", each 2kB in size. If we continued with our EEPROM being 4Kb, we'd always need to operate
+ * on 2 of these pages. Each write, we'd use 2 different pages from a pool of pages until we are done.
+ */
+
+#if ENABLED(FLASH_EEPROM_LEVELING)
+
+  #include "stm32_def.h"
+
+  #define DEBUG_OUT ENABLED(EEPROM_CHITCHAT)
+  #include "src/core/debug_out.h"
+
+  #ifndef EEPROM_SIZE
+    #define EEPROM_SIZE           0x1000  // 4kB
+  #endif
+
+  #ifndef FLASH_SECTOR
+    #define FLASH_SECTOR          (FLASH_SECTOR_TOTAL - 1)
+  #endif
+  #ifndef FLASH_UNIT_SIZE
+    #define FLASH_UNIT_SIZE       0x20000 // 128kB
+  #endif
+
+  #define FLASH_ADDRESS_START     (FLASH_END - ((FLASH_SECTOR_TOTAL - FLASH_SECTOR) * FLASH_UNIT_SIZE) + 1)
+  #define FLASH_ADDRESS_END       (FLASH_ADDRESS_START + FLASH_UNIT_SIZE  - 1)
+
+  #define EEPROM_SLOTS            (FLASH_UNIT_SIZE/EEPROM_SIZE)
+  #define SLOT_ADDRESS(slot)      (FLASH_ADDRESS_START + (slot * EEPROM_SIZE))
+
+  #define UNLOCK_FLASH()          if (!flash_unlocked) { \
+                                    HAL_FLASH_Unlock(); \
+                                    __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | \
+                                                           FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR | FLASH_FLAG_PGSERR); \
+                                    flash_unlocked = true; \
+                                  }
+  #define LOCK_FLASH()            if (flash_unlocked) { HAL_FLASH_Lock(); flash_unlocked = false; }
+
+  #define EMPTY_UINT32            ((uint32_t)-1)
+  #define EMPTY_UINT8             ((uint8_t)-1)
+
+  static uint8_t ram_eeprom[EEPROM_SIZE] __attribute__((aligned(4))) = {0};
+  static int current_slot = -1;
+
+  static_assert(0 == EEPROM_SIZE % 4, "EEPROM_SIZE must be a multiple of 4"); // Ensure copying as uint32_t is safe
+  static_assert(0 == FLASH_UNIT_SIZE % EEPROM_SIZE, "EEPROM_SIZE must divide evenly into your FLASH_UNIT_SIZE");
+  static_assert(FLASH_UNIT_SIZE >= EEPROM_SIZE, "FLASH_UNIT_SIZE must be greater than or equal to your EEPROM_SIZE");
+  static_assert(IS_FLASH_SECTOR(FLASH_SECTOR), "FLASH_SECTOR is invalid");
+  static_assert(IS_POWER_OF_2(FLASH_UNIT_SIZE), "FLASH_UNIT_SIZE should be a power of 2, please check your chip's spec sheet");
+
+#endif
+
+static bool eeprom_data_written = false;
+
+bool PersistentStore::access_start() {
+
+  #if ENABLED(FLASH_EEPROM_LEVELING)
+
+    if (current_slot == -1 || eeprom_data_written) {
+      // This must be the first time since power on that we have accessed the storage, or someone
+      // loaded and called write_data and never called access_finish.
+      // Lets go looking for the slot that holds our configuration.
+      if (eeprom_data_written) DEBUG_ECHOLN("Dangling EEPROM write_data");
+      uint32_t address = FLASH_ADDRESS_START;
+      while (address <= FLASH_ADDRESS_END) {
+        uint32_t address_value = (*(__IO uint32_t*)address);
+        if (address_value != EMPTY_UINT32) {
+          current_slot = (address - FLASH_ADDRESS_START) / EEPROM_SIZE;
+          break;
+        }
+        address += sizeof(uint32_t);
+      }
+      if (current_slot == -1) {
+        // We didn't find anything, so we'll just intialize to empty
+        for (int i = 0; i < EEPROM_SIZE; i++) ram_eeprom[i] = EMPTY_UINT8;
+        current_slot = EEPROM_SLOTS;
+      }
+      else {
+        // load current settings
+        uint8_t *eeprom_data = (uint8_t *)SLOT_ADDRESS(current_slot);
+        for (int i = 0; i < EEPROM_SIZE; i++) ram_eeprom[i] = eeprom_data[i];
+        DEBUG_ECHOLNPAIR("EEPROM loaded from slot ", current_slot, ".");
+      }
+      eeprom_data_written = false;
+    }
+
+  #else
+    eeprom_buffer_fill();
+  #endif
+
+  return true;
+}
+
+bool PersistentStore::access_finish() {
+
+  if (eeprom_data_written) {
+
+    #if ENABLED(FLASH_EEPROM_LEVELING)
+
+      HAL_StatusTypeDef status = HAL_ERROR;
+      bool flash_unlocked = false;
+
+      if (--current_slot < 0) {
+        // all slots have been used, erase everything and start again
+
+        FLASH_EraseInitTypeDef EraseInitStruct;
+        uint32_t SectorError = 0;
+
+        EraseInitStruct.TypeErase = FLASH_TYPEERASE_SECTORS;
+        EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;
+        EraseInitStruct.Sector = FLASH_SECTOR;
+        EraseInitStruct.NbSectors = 1;
+
+        current_slot = EEPROM_SLOTS - 1;
+        UNLOCK_FLASH();
+
+        status = HAL_FLASHEx_Erase(&EraseInitStruct, &SectorError);
+        if (status != HAL_OK) {
+          DEBUG_ECHOLNPAIR("HAL_FLASHEx_Erase=", status);
+          DEBUG_ECHOLNPAIR("GetError=", HAL_FLASH_GetError());
+          DEBUG_ECHOLNPAIR("SectorError=", SectorError);
+          LOCK_FLASH();
+          return false;
+        }
+      }
+
+      UNLOCK_FLASH();
+
+      uint32_t offset = 0;
+      uint32_t address = SLOT_ADDRESS(current_slot);
+      uint32_t address_end = address + EEPROM_SIZE;
+      uint32_t data = 0;
+
+      bool success = true;
+
+      while (address < address_end) {
+        memcpy(&data, ram_eeprom + offset, sizeof(uint32_t));
+        status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, data);
+        if (status == HAL_OK) {
+          address += sizeof(uint32_t);
+          offset += sizeof(uint32_t);
+        }
+        else {
+          DEBUG_ECHOLNPAIR("HAL_FLASH_Program=", status);
+          DEBUG_ECHOLNPAIR("GetError=", HAL_FLASH_GetError());
+          DEBUG_ECHOLNPAIR("address=", address);
+          success = false;
+          break;
+        }
+      }
+
+      LOCK_FLASH();
+
+      if (success) {
+        eeprom_data_written = false;
+        DEBUG_ECHOLNPAIR("EEPROM saved to slot ", current_slot, ".");
+      }
+
+      return success;
+
+    #else
+      eeprom_buffer_flush();
+      eeprom_data_written = false;
+    #endif
+  }
+
+  return true;
+}
+
+bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+  while (size--) {
+    uint8_t v = *value;
+    #if ENABLED(FLASH_EEPROM_LEVELING)
+      if (v != ram_eeprom[pos]) {
+        ram_eeprom[pos] = v;
+        eeprom_data_written = true;
+      }
+    #else
+      if (v != eeprom_buffered_read_byte(pos)) {
+        eeprom_buffered_write_byte(pos, v);
+        eeprom_data_written = true;
+      }
+    #endif
+    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*/) {
+  do {
+    const uint8_t c = (
+      #if ENABLED(FLASH_EEPROM_LEVELING)
+        ram_eeprom[pos]
+      #else
+        eeprom_buffered_read_byte(pos)
+      #endif
+    );
+    if (writing) *value = c;
+    crc16(crc, &c, 1);
+    pos++;
+    value++;
+  } while (--size);
+  return false;
+}
+
+size_t PersistentStore::capacity() {
+  return (
+    #if ENABLED(FLASH_EEPROM_LEVELING)
+      EEPROM_SIZE
+    #else
+      E2END + 1
+    #endif
+  );
+}
+
+#endif // EEPROM_SETTINGS && FLASH_EEPROM_EMULATION
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC

Marlin/src/HAL/HAL_STM32/persistent_store_impl.cpp

@@ -24,29 +24,15 @@
 
 #include "../../inc/MarlinConfig.h"
 
-#if ENABLED(EEPROM_SETTINGS) && ANY(FLASH_EEPROM_EMULATION, SRAM_EEPROM_EMULATION, SPI_EEPROM, I2C_EEPROM)
+#if ENABLED(EEPROM_SETTINGS) && ANY(SRAM_EEPROM_EMULATION, SPI_EEPROM, I2C_EEPROM)
 
 #include "../shared/persistent_store_api.h"
 
-#if ENABLED(FLASH_EEPROM_EMULATION)
-  #include <EEPROM.h>
-  static bool eeprom_data_written = false;
-#endif
-
 bool PersistentStore::access_start() {
-  #if ENABLED(FLASH_EEPROM_EMULATION)
-    eeprom_buffer_fill();
-  #endif
   return true;
 }
 
 bool PersistentStore::access_finish() {
-  #if ENABLED(FLASH_EEPROM_EMULATION)
-    if (eeprom_data_written) {
-      eeprom_buffer_flush();
-      eeprom_data_written = false;
-    }
-  #endif
   return true;
 }
 
@@ -66,8 +52,6 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
           return true;
         }
       }
-    #elif ENABLED(FLASH_EEPROM_EMULATION)
-      eeprom_buffered_write_byte(pos, v);
     #else
       *(__IO uint8_t *)(BKPSRAM_BASE + (uint8_t * const)pos) = v;
     #endif
@@ -76,9 +60,6 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
     pos++;
     value++;
   };
-  #if ENABLED(FLASH_EEPROM_EMULATION)
-    eeprom_data_written = true;
-  #endif
 
   return false;
 }
@@ -89,8 +70,6 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
     const uint8_t c = (
       #if EITHER(SPI_EEPROM, I2C_EEPROM)
         eeprom_read_byte((uint8_t*)pos)
-      #elif ENABLED(FLASH_EEPROM_EMULATION)
-        eeprom_buffered_read_byte(pos)
       #else
         (*(__IO uint8_t *)(BKPSRAM_BASE + ((uint8_t*)pos)))
       #endif
@@ -114,5 +93,5 @@ size_t PersistentStore::capacity() {
   );
 }
 
-#endif // EEPROM_SETTINGS && (FLASH_EEPROM_EMULATION || SRAM_EEPROM_EMULATION || SPI_EEPROM || I2C_EEPROM)
+#endif // EEPROM_SETTINGS && (SRAM_EEPROM_EMULATION || SPI_EEPROM || I2C_EEPROM)
 #endif // ARDUINO_ARCH_STM32 && !STM32GENERIC

Marlin/src/HAL/HAL_STM32/timers.h

@@ -33,7 +33,6 @@
 #define hal_timer_t uint32_t
 #define HAL_TIMER_TYPE_MAX 0xFFFFFFFF // Timers can be 16 or 32 bit
 
-
 #ifdef STM32F0xx
 
   #define HAL_TIMER_RATE (F_CPU) // frequency of timer peripherals
@@ -58,18 +57,42 @@
     #define TEMP_TIMER 2
   #endif
 
-#elif defined(STM32F4xx) || defined(STM32F7xx)
+#elif defined(STM32F401xC) || defined(STM32F401xE)
 
-  #define HAL_TIMER_RATE (F_CPU/2) // frequency of timer peripherals
+  #define HAL_TIMER_RATE (F_CPU / 2) // frequency of timer peripherals
 
   #ifndef STEP_TIMER
-    #define STEP_TIMER 5
+    #define STEP_TIMER 9
+  #endif
+
+  #ifndef TEMP_TIMER
+    #define TEMP_TIMER 10
+  #endif
+
+#elif defined(STM32F4xx)
+
+  #define HAL_TIMER_RATE (F_CPU / 2) // frequency of timer peripherals
+
+  #ifndef STEP_TIMER
+    #define STEP_TIMER 6  // STM32F401 has no TIM6, TIM7, or TIM8
   #endif
 
   #ifndef TEMP_TIMER
     #define TEMP_TIMER 14 // TIM7 is consumed by Software Serial if used.
   #endif
 
+#elif defined(STM32F7xx)
+
+  #define HAL_TIMER_RATE (F_CPU / 2) // frequency of timer peripherals
+
+  #ifndef STEP_TIMER
+    #define STEP_TIMER 6  // the RIGHT timer!
+  #endif
+
+  #ifndef TEMP_TIMER
+    #define TEMP_TIMER 14
+  #endif
+
 #endif
 
 #ifndef SWSERIAL_TIMER_IRQ_PRIO
@@ -81,16 +104,16 @@
 #endif
 
 #ifndef TEMP_TIMER_IRQ_PRIO
-  #define TEMP_TIMER_IRQ_PRIO 14 //14 = after hardware ISRs
+  #define TEMP_TIMER_IRQ_PRIO 14   // 14 = after hardware ISRs
 #endif
 
 #define STEP_TIMER_NUM 0  // index of timer to use for stepper
 #define TEMP_TIMER_NUM 1  // index of timer to use for temperature
 #define PULSE_TIMER_NUM STEP_TIMER_NUM
 
-#define TEMP_TIMER_FREQUENCY 1000 //Temperature::isr() is expected to be called at around 1kHz
+#define TEMP_TIMER_FREQUENCY 1000   // Temperature::isr() is expected to be called at around 1kHz
 
-//TODO: get rid of manual rate/prescale/ticks/cycles taken for procedures in stepper.cpp
+// TODO: get rid of manual rate/prescale/ticks/cycles taken for procedures in stepper.cpp
 #define STEPPER_TIMER_RATE 2000000 // 2 Mhz
 #define STEPPER_TIMER_PRESCALE ((HAL_TIMER_RATE)/(STEPPER_TIMER_RATE))
 #define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs

Marlin/src/HAL/HAL_STM32F1/HAL.cpp

@@ -118,6 +118,12 @@ const uint8_t adc_pins[] = {
   #if HAS_TEMP_ADC_5
     TEMP_5_PIN,
   #endif
+  #if HAS_TEMP_ADC_6
+    TEMP_6_PIN,
+  #endif
+  #if HAS_TEMP_ADC_7
+    TEMP_7_PIN,
+  #endif
   #if ENABLED(FILAMENT_WIDTH_SENSOR)
     FILWIDTH_PIN,
   #endif
@@ -160,6 +166,12 @@ enum TEMP_PINS : char {
   #if HAS_TEMP_ADC_5
     TEMP_5,
   #endif
+  #if HAS_TEMP_ADC_6
+    TEMP_6,
+  #endif
+  #if HAS_TEMP_ADC_7
+    TEMP_7,
+  #endif
   #if ENABLED(FILAMENT_WIDTH_SENSOR)
     FILWIDTH,
   #endif
@@ -346,6 +358,12 @@ void HAL_adc_start_conversion(const uint8_t adc_pin) {
     #if HAS_TEMP_ADC_5
       case TEMP_5_PIN: pin_index = TEMP_5; break;
     #endif
+    #if HAS_TEMP_ADC_6
+      case TEMP_6_PIN: pin_index = TEMP_6; break;
+    #endif
+    #if HAS_TEMP_ADC_7
+      case TEMP_7_PIN: pin_index = TEMP_7; break;
+    #endif
     #if HAS_JOY_ADC_X
       case JOY_X_PIN: pin_index = JOY_X; break;
     #endif

Marlin/src/HAL/HAL_STM32F1/HAL.h

@@ -78,13 +78,10 @@
   #define MSerial5  Serial4
 #endif
 
-#if !WITHIN(SERIAL_PORT, -1, 5)
-  #error "SERIAL_PORT must be from -1 to 5"
-#endif
-#if SERIAL_PORT == -1
+#if SERIAL_PORT == 0
+  #error "SERIAL_PORT cannot be 0. (Port 0 does not exist.) Please update your configuration."
+#elif SERIAL_PORT == -1
   #define MYSERIAL0 UsbSerial
-#elif SERIAL_PORT == 0
-  #error "Serial port 0 does not exist"
 #elif SERIAL_PORT == 1
   #define MYSERIAL0 MSerial1
 #elif SERIAL_PORT == 2
@@ -95,19 +92,17 @@
   #define MYSERIAL0 MSerial4
 #elif SERIAL_PORT == 5
   #define MYSERIAL0 MSerial5
+#else
+  #error "SERIAL_PORT must be from -1 to 5. Please update your configuration."
 #endif
 
 #ifdef SERIAL_PORT_2
-  #if !WITHIN(SERIAL_PORT_2, -1, 5)
-    #error "SERIAL_PORT_2 must be from -1 to 5"
+  #if SERIAL_PORT_2 == 0
+    #error "SERIAL_PORT_2 cannot be 0. (Port 0 does not exist.) Please update your configuration."
   #elif SERIAL_PORT_2 == SERIAL_PORT
-    #error "SERIAL_PORT_2 must be different than SERIAL_PORT"
-  #endif
-  #define NUM_SERIAL 2
-  #if SERIAL_PORT_2 == -1
+    #error "SERIAL_PORT_2 must be different than SERIAL_PORT. Please update your configuration."
+  #elif SERIAL_PORT_2 == -1
     #define MYSERIAL1 UsbSerial
-  #elif SERIAL_PORT_2 == 0
-  #error "Serial port 0 does not exist"
   #elif SERIAL_PORT_2 == 1
     #define MYSERIAL1 MSerial1
   #elif SERIAL_PORT_2 == 2
@@ -118,11 +113,39 @@
     #define MYSERIAL1 MSerial4
   #elif SERIAL_PORT_2 == 5
     #define MYSERIAL1 MSerial5
+  #else
+    #error "SERIAL_PORT_2 must be from -1 to 5. Please update your configuration."
   #endif
+  #define NUM_SERIAL 2
 #else
   #define NUM_SERIAL 1
 #endif
 
+#ifdef DGUS_SERIAL
+  #if DGUS_SERIAL_PORT == 0
+    #error "DGUS_SERIAL_PORT cannot be 0. (Port 0 does not exist.) 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."
+  #elif DGUS_SERIAL_PORT == -1
+    #define DGUS_SERIAL UsbSerial
+  #elif DGUS_SERIAL_PORT == 1
+    #define DGUS_SERIAL MSerial1
+  #elif DGUS_SERIAL_PORT == 2
+    #define DGUS_SERIAL MSerial2
+  #elif DGUS_SERIAL_PORT == 3
+    #define DGUS_SERIAL MSerial3
+  #elif DGUS_SERIAL_PORT == 4
+    #define DGUS_SERIAL MSerial4
+  #elif DGUS_SERIAL_PORT == 5
+    #define DGUS_SERIAL MSerial5
+  #else
+    #error "DGUS_SERIAL_PORT must be from -1 to 5. Please update your configuration."
+  #endif
+#endif
+
+
 // Set interrupt grouping for this MCU
 void HAL_init();
 #define HAL_IDLETASK 1

Marlin/src/HAL/HAL_STM32F1/dogm/u8g_com_stm32duino_fsmc.cpp

@@ -49,6 +49,7 @@
 void LCD_IO_Init(uint8_t cs, uint8_t rs);
 void LCD_IO_WriteData(uint16_t RegValue);
 void LCD_IO_WriteReg(uint16_t Reg);
+uint16_t LCD_IO_ReadData(uint16_t RegValue);
 uint32_t LCD_IO_ReadData(uint16_t RegValue, uint8_t ReadSize);
 #ifdef LCD_USE_DMA_FSMC
   void LCD_IO_WriteMultiple(uint16_t data, uint32_t count);
@@ -79,8 +80,11 @@ uint8_t u8g_com_stm32duino_fsmc_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, voi
       LCD_IO_Init(u8g->pin_list[U8G_PI_CS], u8g->pin_list[U8G_PI_A0]);
       u8g_Delay(50);
 
-      if (arg_ptr)
-        *((uint32_t *)arg_ptr) = LCD_IO_ReadData(LCD_READ_ID, 3);
+      if (arg_ptr) {
+        *((uint32_t *)arg_ptr) = LCD_IO_ReadData(0x0000);
+        if (*((uint32_t *)arg_ptr) == 0)
+          *((uint32_t *)arg_ptr) = (LCD_READ_ID << 24) | LCD_IO_ReadData(LCD_READ_ID, 3);
+      }
       isCommand = 0;
       break;
 
@@ -265,6 +269,13 @@ void LCD_IO_WriteReg(uint16_t Reg) {
   __DSB();
 }
 
+uint16_t LCD_IO_ReadData(uint16_t RegValue) {
+  LCD->REG = RegValue;
+  __DSB();
+
+  return LCD->RAM;
+}
+
 uint32_t LCD_IO_ReadData(uint16_t RegValue, uint8_t ReadSize) {
   volatile uint32_t data;
   LCD->REG = RegValue;

Marlin/src/HAL/HAL_STM32F1/endstop_interrupts.h

@@ -82,6 +82,12 @@ void setup_endstop_interrupts() {
   #endif
   #if HAS_Z3_MIN
     attachInterrupt(Z3_MIN_PIN, endstop_ISR, CHANGE);
+  #endif
+    #if HAS_Z4_MAX
+    attachInterrupt(Z4_MAX_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Z4_MIN
+    attachInterrupt(Z4_MIN_PIN, endstop_ISR, CHANGE);
   #endif
   #if HAS_Z_MIN_PROBE_PIN
     attachInterrupt(Z_MIN_PROBE_PIN, endstop_ISR, CHANGE);

Marlin/src/HAL/HAL_STM32F1/inc/SanityCheck.h

@@ -37,7 +37,7 @@
   #error "FAST_PWM_FAN is not yet implemented for this platform."
 #endif
 
-#if !defined(HAVE_SW_SERIAL) && HAS_TMC220x
+#if !defined(HAVE_SW_SERIAL) && TMC_HAS_SW_SERIAL
   #warning "With TMC2208/9 consider using SoftwareSerialM with HAVE_SW_SERIAL and appropriate SS_TIMER."
   #error "Missing SoftwareSerial implementation."
 #endif

Marlin/src/HAL/HAL_STM32F1/persistent_store_flash.cpp

@@ -40,53 +40,73 @@
 #include <EEPROM.h>
 
 // Store settings in the last two pages
-// Flash pages must be erased before writing, so keep track.
-bool firstWrite = false;
+#define EEPROM_SIZE (EEPROM_PAGE_SIZE * 2)
+#define ACCESS_FINISHED(TF) do{ FLASH_Lock(); eeprom_dirty = false; return TF; }while(0)
+
+static uint8_t ram_eeprom[EEPROM_SIZE] __attribute__((aligned(4))) = {0};
+static bool eeprom_dirty = false;
 
 bool PersistentStore::access_start() {
-  firstWrite = true;
+  const uint32_t* source = reinterpret_cast<const uint32_t*>(EEPROM_PAGE0_BASE);
+  uint32_t* destination = reinterpret_cast<uint32_t*>(ram_eeprom);
+
+  static_assert(0 == EEPROM_SIZE % 4, "EEPROM_SIZE is corrupted. (Must be a multiple of 4.)"); // Ensure copying as uint32_t is safe
+  constexpr size_t eeprom_size_u32 = EEPROM_SIZE / 4;
+
+  for (size_t i = 0; i < eeprom_size_u32; ++i, ++destination, ++source)
+    *destination = *source;
+
+  eeprom_dirty = false;
   return true;
 }
 
 bool PersistentStore::access_finish() {
-  FLASH_Lock();
-  firstWrite = false;
+
+  if (eeprom_dirty) {
+    FLASH_Status status;
+
+    // Instead of erasing all (both) pages, maybe in the loop we check what page we are in, and if the
+    // data has changed in that page. We then erase the first time we "detect" a change. In theory, if
+    // nothing changed in a page, we wouldn't need to erase/write it.
+    // Or, instead of checking at this point, turn eeprom_dirty into an array of bool the size of number
+    // of pages. Inside write_data, we set the flag to true at that time if something in that
+    // page changes...either way, something to look at later.
+    FLASH_Unlock();
+
+    status = FLASH_ErasePage(EEPROM_PAGE0_BASE);
+    if (status != FLASH_COMPLETE) ACCESS_FINISHED(true);
+    status = FLASH_ErasePage(EEPROM_PAGE1_BASE);
+    if (status != FLASH_COMPLETE) ACCESS_FINISHED(true);
+
+    const uint16_t *source = reinterpret_cast<const uint16_t*>(ram_eeprom);
+    for (size_t i = 0; i < EEPROM_SIZE; i += 2, ++source) {
+      if (FLASH_ProgramHalfWord(EEPROM_PAGE0_BASE + i, *source) != FLASH_COMPLETE)
+        ACCESS_FINISHED(false);
+    }
+
+    ACCESS_FINISHED(true);
+  }
+
   return true;
 }
 
 bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
-  FLASH_Status status;
-
-  if (firstWrite) {
-    FLASH_Unlock();
-    status = FLASH_ErasePage(EEPROM_PAGE0_BASE);
-    if (status != FLASH_COMPLETE) return true;
-    status = FLASH_ErasePage(EEPROM_PAGE1_BASE);
-    if (status != FLASH_COMPLETE) return true;
-    firstWrite = false;
-  }
-
-  for (size_t i = 0; i < size; i++) {
-    if (FLASH_ProgramHalfWord(EEPROM_PAGE0_BASE + (pos + i) * 2, value[i]) != FLASH_COMPLETE)
-      return true;
-  }
-
+  for (size_t i = 0; i < size; ++i) ram_eeprom[pos + i] = value[i];
+  eeprom_dirty = true;
   crc16(crc, value, size);
   pos += size;
-  return false;
+  return false;  // return true for any error
 }
 
 bool PersistentStore::read_data(int &pos, uint8_t* value, const size_t size, uint16_t *crc, const bool writing/*=true*/) {
-  for (size_t i = 0; i < size; i++) {
-    uint8_t v = *(uint16_t *)(EEPROM_PAGE0_BASE + (pos + i) * 2);
-    if (writing) value[i] = v;
-    crc16(crc, &v, 1);
-  }
+  const uint8_t * const buff = writing ? &value[0] : &ram_eeprom[pos];
+  if (writing) for (size_t i = 0; i < size; i++) value[i] = ram_eeprom[pos + i];
+  crc16(crc, buff, size);
   pos += size;
-  return false;
+  return false;  // return true for any error
 }
 
-size_t PersistentStore::capacity() { return size_t(E2END + 1); }
+size_t PersistentStore::capacity() { return EEPROM_SIZE; }
 
 #endif // EEPROM_SETTINGS && EEPROM FLASH
 #endif // __STM32F1__

Marlin/src/HAL/HAL_STM32_F4_F7/HAL.h

@@ -44,17 +44,12 @@
 // Defines
 // ------------------------
 
-//Serial override
+// Serial override
 //extern HalSerial usb_serial;
 
 #if defined(STM32F4) && SERIAL_PORT == 0
-  #error "Serial port 0 does not exist"
-#endif
-
-#if !WITHIN(SERIAL_PORT, -1, 6)
-  #error "SERIAL_PORT must be from -1 to 6"
-#endif
-#if SERIAL_PORT == -1
+  #error "SERIAL_PORT cannot be 0. (Port 0 does not exist.) Please update your configuration."
+#elif SERIAL_PORT == -1
   #define MYSERIAL0 SerialUSB
 #elif SERIAL_PORT == 1
   #define MYSERIAL0 SerialUART1
@@ -68,19 +63,16 @@
   #define MYSERIAL0 SerialUART5
 #elif SERIAL_PORT == 6
   #define MYSERIAL0 SerialUART6
+#else
+  #error "SERIAL_PORT must be from -1 to 6. Please update your configuration."
 #endif
 
 #ifdef SERIAL_PORT_2
   #if defined(STM32F4) && SERIAL_PORT_2 == 0
-    #error "Serial port 0 does not exist"
-  #endif
-  #if !WITHIN(SERIAL_PORT_2, -1, 6)
-    #error "SERIAL_PORT_2 must be from -1 to 6"
+    #error "SERIAL_PORT_2 cannot be 0. (Port 0 does not exist.) Please update your configuration."
   #elif SERIAL_PORT_2 == SERIAL_PORT
-    #error "SERIAL_PORT_2 must be different than SERIAL_PORT"
-  #endif
-  #define NUM_SERIAL 2
-  #if SERIAL_PORT_2 == -1
+    #error "SERIAL_PORT_2 must be different than SERIAL_PORT. Please update your configuration."
+  #elif SERIAL_PORT_2 == -1
     #define MYSERIAL1 SerialUSB
   #elif SERIAL_PORT_2 == 1
     #define MYSERIAL1 SerialUART1
@@ -94,11 +86,40 @@
     #define MYSERIAL1 SerialUART5
   #elif SERIAL_PORT_2 == 6
     #define MYSERIAL1 SerialUART6
+  #else
+    #error "SERIAL_PORT_2 must be from -1 to 6. Please update your configuration."
   #endif
+  #define NUM_SERIAL 2
 #else
   #define NUM_SERIAL 1
 #endif
 
+#ifdef DGUS_SERIAL_PORT
+  #if defined(STM32F4) && DGUS_SERIAL_PORT == 0
+    #error "DGUS_SERIAL_PORT cannot be 0. (Port 0 does not exist.) 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."
+  #elif DGUS_SERIAL_PORT == -1
+    #define DGUS_SERIAL SerialUSB
+  #elif DGUS_SERIAL_PORT == 1
+    #define DGUS_SERIAL SerialUART1
+  #elif DGUS_SERIAL_PORT == 2
+    #define DGUS_SERIAL SerialUART2
+  #elif DGUS_SERIAL_PORT == 3
+    #define DGUS_SERIAL SerialUART3
+  #elif DGUS_SERIAL_PORT == 4
+    #define DGUS_SERIAL SerialUART4
+  #elif DGUS_SERIAL_PORT == 5
+    #define DGUS_SERIAL SerialUART5
+  #elif DGUS_SERIAL_PORT == 6
+    #define DGUS_SERIAL SerialUART6
+  #else
+    #error "DGUS_SERIAL_PORT must be from -1 to 6. Please update your configuration."
+  #endif
+#endif
+
 /**
  * TODO: review this to return 1 for pins that are not analog input
  */

Marlin/src/HAL/HAL_STM32_F4_F7/STM32F7/TMC2660.cpp

@@ -36,7 +36,7 @@
 #include "TMC2660.h"
 
 #include "../../../inc/MarlinConfig.h"
-#include "../../../Marlin.h"
+#include "../../../MarlinCore.h"
 #include "../../../module/stepper/indirection.h"
 #include "../../../module/printcounter.h"
 #include "../../../libs/duration_t.h"

Marlin/src/HAL/HAL_STM32_F4_F7/endstop_interrupts.h

@@ -58,6 +58,12 @@ void setup_endstop_interrupts() {
   #if HAS_Z3_MIN
     attachInterrupt(Z3_MIN_PIN, endstop_ISR, CHANGE);
   #endif
+  #if HAS_Z4_MAX
+    attachInterrupt(Z4_MAX_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Z4_MIN
+    attachInterrupt(Z4_MIN_PIN, endstop_ISR, CHANGE);
+  #endif
   #if HAS_Z_MIN_PROBE_PIN
     attachInterrupt(Z_MIN_PROBE_PIN, endstop_ISR, CHANGE);
   #endif

Marlin/src/HAL/HAL_STM32_F4_F7/inc/SanityCheck.h

@@ -35,3 +35,7 @@
 #if ENABLED(FAST_PWM_FAN)
   #error "FAST_PWM_FAN is not yet implemented for this platform."
 #endif
+
+#if TMC_HAS_SW_SERIAL
+  #error "TMC220x Software Serial is not supported on this platform."
+#endif

Marlin/src/HAL/HAL_TEENSY31_32/inc/SanityCheck.h

@@ -32,3 +32,7 @@
 #if ENABLED(FAST_PWM_FAN)
   #error "FAST_PWM_FAN is not yet implemented for this platform."
 #endif
+
+#if TMC_HAS_SW_SERIAL
+  #error "TMC220x Software Serial is not supported on this platform."
+#endif

Marlin/src/HAL/HAL_TEENSY35_36/HAL.cpp

@@ -94,7 +94,7 @@ extern "C" {
 }
 
 void HAL_adc_start_conversion(const uint8_t adc_pin) {
-  uint16_t pin = pin2sc1a[adc_pin];
+  const uint16_t pin = pin2sc1a[adc_pin];
   if (pin == 0xFF) {
     // Digital only
     HAL_adc_select = -1;

Marlin/src/HAL/HAL_TEENSY35_36/endstop_interrupts.h

@@ -76,6 +76,12 @@ void setup_endstop_interrupts() {
   #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

Marlin/src/HAL/HAL_TEENSY35_36/inc/SanityCheck.h

@@ -32,3 +32,7 @@
 #if ENABLED(FAST_PWM_FAN)
   #error "FAST_PWM_FAN is not yet implemented for this platform."
 #endif
+
+#if TMC_HAS_SW_SERIAL
+  #error "TMC220x Software Serial is not supported on this platform."
+#endif

Marlin/src/HAL/shared/Delay.h

@@ -145,21 +145,7 @@
   }
   #undef nop
 
-#elif defined(ESP32)
-
-  FORCE_INLINE static void DELAY_CYCLES(uint32_t x) {
-    unsigned long ccount, stop;
-
-    __asm__ __volatile__ ( "rsr     %0, ccount" : "=a" (ccount) );
-
-    stop = ccount + x; // This can overflow
-
-    while (ccount < stop) { // This doesn't deal with overflows
-      __asm__ __volatile__ ( "rsr     %0, ccount" : "=a" (ccount) );
-    }
-  }
-
-#elif defined(__PLAT_LINUX__)
+#elif defined(__PLAT_LINUX__) || defined(ESP32)
 
   // specified inside platform
 

Marlin/src/HAL/shared/HAL_spi_L6470.cpp

@@ -27,12 +27,12 @@
 
 #include "../../inc/MarlinConfig.h"
 
-#if HAS_DRIVER(L6470)
+#if HAS_L64XX
 
 #include "Delay.h"
 
 #include "../../core/serial.h"
-#include "../../libs/L6470/L6470_Marlin.h"
+#include "../../libs/L64XX/L64XX_Marlin.h"
 
 // Make sure GCC optimizes this file.
 // Note that this line triggers a bug in GCC which is fixed by casting.
@@ -40,7 +40,7 @@
 #pragma GCC optimize (3)
 
 // run at ~4Mhz
-uint8_t L6470_SpiTransfer_Mode_0(uint8_t b) { // using Mode 0
+inline uint8_t L6470_SpiTransfer_Mode_0(uint8_t b) { // using Mode 0
   for (uint8_t bits = 8; bits--;) {
     WRITE(L6470_CHAIN_MOSI_PIN, b & 0x80);
     b <<= 1;        // little setup time
@@ -56,61 +56,26 @@ uint8_t L6470_SpiTransfer_Mode_0(uint8_t b) { // using Mode 0
   return b;
 }
 
-uint8_t L6470_SpiTransfer_Mode_3(uint8_t b) { // using Mode 3
+inline uint8_t L6470_SpiTransfer_Mode_3(uint8_t b) { // using Mode 3
   for (uint8_t bits = 8; bits--;) {
     WRITE(L6470_CHAIN_SCK_PIN, LOW);
     WRITE(L6470_CHAIN_MOSI_PIN, b & 0x80);
 
     DELAY_NS(125);  // 10 cycles @ 84mhz
-
     WRITE(L6470_CHAIN_SCK_PIN, HIGH);
+    DELAY_NS(125);  // Need more delay for fast CPUs
 
     b <<= 1;        // little setup time
     b |= (READ(L6470_CHAIN_MISO_PIN) != 0);
   }
-
-  DELAY_NS(125);  // 10 cycles @ 84mhz
+  DELAY_NS(125);    // 10 cycles @ 84mhz
   return b;
 }
 
 /**
- * The following are weak-linked and defined as do-nothing
- * functions by the L6470-Arduino library. They must be
- * defined by the client (Marlin) to provide an SPI interface.
+ * L64XX methods for SPI init and transfer
  */
-
-uint8_t L6470_transfer(uint8_t data, int16_t ss_pin, const uint8_t chain_position) {
-  uint8_t data_out = 0;
-
-  // first device in chain has data sent last
-  extDigitalWrite(ss_pin, LOW);
-
-  for (uint8_t i = L6470::chain[0]; (i >= 1) && !spi_abort; i--) {    // stop sending data if spi_abort is active
-    DISABLE_ISRS();  // disable interrupts during SPI transfer (can't allow partial command to chips)
-    uint8_t temp = L6470_SpiTransfer_Mode_3(uint8_t(i == chain_position ? data : dSPIN_NOP));
-    ENABLE_ISRS();  // enable interrupts
-    if (i == chain_position) data_out = temp;
-  }
-
-  extDigitalWrite(ss_pin, HIGH);
-  return data_out;
-}
-
-void L6470_transfer(uint8_t L6470_buf[], const uint8_t length) {
-  // first device in chain has data sent last
-
-  if (spi_active) {                    // interrupted SPI transfer so need to
-    WRITE(L6470_CHAIN_SS_PIN, HIGH);   // guarantee min high of 650nS
-    DELAY_US(1);
-  }
-
-  WRITE(L6470_CHAIN_SS_PIN, LOW);
-  for (uint8_t i = length; i >= 1; i--)
-    L6470_SpiTransfer_Mode_3(uint8_t(L6470_buf[i]));
-  WRITE(L6470_CHAIN_SS_PIN, HIGH);
-}
-
-void L6470_spi_init() {
+void L64XX_Marlin::spi_init() {
   OUT_WRITE(L6470_CHAIN_SS_PIN, HIGH);
   OUT_WRITE(L6470_CHAIN_SCK_PIN, HIGH);
   OUT_WRITE(L6470_CHAIN_MOSI_PIN, HIGH);
@@ -123,6 +88,52 @@ void L6470_spi_init() {
   OUT_WRITE(L6470_CHAIN_MOSI_PIN, HIGH);
 }
 
+uint8_t L64XX_Marlin::transfer_single(uint8_t data, int16_t ss_pin) {
+  // First device in chain has data sent last
+  extDigitalWrite(ss_pin, LOW);
+
+  DISABLE_ISRS(); // Disable interrupts during SPI transfer (can't allow partial command to chips)
+  const uint8_t data_out = L6470_SpiTransfer_Mode_3(data);
+  ENABLE_ISRS();  // Enable interrupts
+
+  extDigitalWrite(ss_pin, HIGH);
+  return data_out;
+}
+
+uint8_t L64XX_Marlin::transfer_chain(uint8_t data, int16_t ss_pin, uint8_t chain_position) {
+  uint8_t data_out = 0;
+
+  // first device in chain has data sent last
+  extDigitalWrite(ss_pin, LOW);
+
+  for (uint8_t i = L64XX::chain[0]; !L64xxManager.spi_abort && i >= 1; i--) {   // Send data unless aborted
+    DISABLE_ISRS();   // Disable interrupts during SPI transfer (can't allow partial command to chips)
+    const uint8_t temp = L6470_SpiTransfer_Mode_3(uint8_t(i == chain_position ? data : dSPIN_NOP));
+    ENABLE_ISRS();    // Enable interrupts
+    if (i == chain_position) data_out = temp;
+  }
+
+  extDigitalWrite(ss_pin, HIGH);
+  return data_out;
+}
+
+/**
+ * Platform-supplied L6470 buffer transfer method
+ */
+void L64XX_Marlin::transfer(uint8_t L6470_buf[], const uint8_t length) {
+  // First device in chain has its data sent last
+
+  if (spi_active) {                   // Interrupted SPI transfer so need to
+    WRITE(L6470_CHAIN_SS_PIN, HIGH);  //  guarantee min high of 650ns
+    DELAY_US(1);
+  }
+
+  WRITE(L6470_CHAIN_SS_PIN, LOW);
+  for (uint8_t i = length; i >= 1; i--)
+    L6470_SpiTransfer_Mode_3(uint8_t(L6470_buf[i]));
+  WRITE(L6470_CHAIN_SS_PIN, HIGH);
+}
+
 #pragma GCC reset_options
 
-#endif // HAS_DRIVER(L6470)
+#endif // HAS_L64XX

Marlin/src/HAL/shared/MarlinSerial.h

@@ -28,6 +28,13 @@
 #include "../../inc/MarlinConfigPre.h"
 
 constexpr bool
+  #if HAS_DGUS_LCD
+    bDGUS_SERIAL_STATS_RX_BUFFER_OVERRUNS = (false
+      #if ENABLED(DGUS_SERIAL_STATS_RX_BUFFER_OVERRUNS)
+        || true
+      #endif
+    ),
+  #endif
   bSERIAL_XON_XOFF = (false
     #if ENABLED(SERIAL_XON_XOFF)
       || true

Marlin/src/HAL/shared/backtrace/backtrace.cpp

@@ -35,7 +35,7 @@ static bool UnwReportOut(void* ctx, const UnwReport* bte) {
 
   (*p)++;
 
-  SERIAL_CHAR('#'); SERIAL_PRINT(*p,DEC); SERIAL_ECHOPGM(" : ");
+  SERIAL_CHAR('#'); SERIAL_PRINT(*p, DEC); SERIAL_ECHOPGM(" : ");
   SERIAL_ECHOPGM(bte->name ? bte->name : "unknown"); SERIAL_ECHOPGM("@0x"); SERIAL_PRINT(bte->function, HEX);
   SERIAL_CHAR('+'); SERIAL_PRINT(bte->address - bte->function,DEC);
   SERIAL_ECHOPGM(" PC:"); SERIAL_PRINT(bte->address,HEX); SERIAL_CHAR('\n');

Marlin/src/HAL/shared/backtrace/unwinder.h

@@ -164,7 +164,7 @@ typedef struct {
  * link register (i.e. not a normal register) and the stack pointer value
  * supplied.
  *
- * -If the program was compiled with -funwind-tables , it will use them to
+ * -If the program was compiled with -funwind-tables it will use them to
  * perform the traceback. Otherwise, brute force will be employed
  * -If the program was compiled with -mpoke-function-name, then you will
  * get function names in the traceback. Otherwise, you will not.

Marlin/src/Marlin.h

@@ -1,381 +0,0 @@
-/**
- * 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
-
-#include "inc/MarlinConfig.h"
-
-#ifdef DEBUG_GCODE_PARSER
-  #include "gcode/parser.h"
-#endif
-
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#if HAS_DRIVER(L6470)
-  #include "libs/L6470/L6470_Marlin.h"
-  extern uint8_t axis_known_position;
-#endif
-
-void stop();
-
-void idle(
-  #if ENABLED(ADVANCED_PAUSE_FEATURE)
-    bool no_stepper_sleep = false  // pass true to keep steppers from disabling on timeout
-  #endif
-);
-
-void manage_inactivity(const bool ignore_stepper_queue=false);
-
-//
-// X, Y, Z Stepper enable / disable
-//
-#if AXIS_DRIVER_TYPE_X(L6470)
-  extern L6470 stepperX;
-  #define X_enable()  NOOP
-  #define X_disable() stepperX.free()
-#elif HAS_X_ENABLE
-  #define X_enable()  X_ENABLE_WRITE( X_ENABLE_ON)
-  #define X_disable() X_ENABLE_WRITE(!X_ENABLE_ON)
-#else
-  #define X_enable()  NOOP
-  #define X_disable() NOOP
-#endif
-
-#if AXIS_DRIVER_TYPE_X2(L6470)
-  extern L6470 stepperX2;
-  #define X2_enable()  NOOP
-  #define X2_disable() stepperX2.free()
-#elif HAS_X2_ENABLE
-  #define X2_enable()  X2_ENABLE_WRITE( X_ENABLE_ON)
-  #define X2_disable() X2_ENABLE_WRITE(!X_ENABLE_ON)
-#else
-  #define X2_enable()  NOOP
-  #define X2_disable() NOOP
-#endif
-
-#define  enable_X() do{ X_enable(); X2_enable(); }while(0)
-#define disable_X() do{ X_disable(); X2_disable(); CBI(axis_known_position, X_AXIS); }while(0)
-
-#if AXIS_DRIVER_TYPE_Y(L6470)
-  extern L6470 stepperY;
-  #define Y_enable()  NOOP
-  #define Y_disable() stepperY.free()
-#elif HAS_Y_ENABLE
-  #define Y_enable()  Y_ENABLE_WRITE( Y_ENABLE_ON)
-  #define Y_disable() Y_ENABLE_WRITE(!Y_ENABLE_ON)
-#else
-  #define Y_enable()  NOOP
-  #define Y_disable() NOOP
-#endif
-
-#if AXIS_DRIVER_TYPE_Y2(L6470)
-  extern L6470 stepperY2;
-  #define Y2_enable()  NOOP
-  #define Y2_disable() stepperY2.free()
-#elif HAS_Y2_ENABLE
-  #define Y2_enable()  Y2_ENABLE_WRITE( Y_ENABLE_ON)
-  #define Y2_disable() Y2_ENABLE_WRITE(!Y_ENABLE_ON)
-#else
-  #define Y2_enable()  NOOP
-  #define Y2_disable() NOOP
-#endif
-
-#define  enable_Y() do{ Y_enable(); Y2_enable(); }while(0)
-#define disable_Y() do{ Y_disable(); Y2_disable(); CBI(axis_known_position, Y_AXIS); }while(0)
-
-#if AXIS_DRIVER_TYPE_Z(L6470)
-  extern L6470 stepperZ;
-  #define Z_enable()  NOOP
-  #define Z_disable() stepperZ.free()
-#elif HAS_Z_ENABLE
-  #define Z_enable()  Z_ENABLE_WRITE( Z_ENABLE_ON)
-  #define Z_disable() Z_ENABLE_WRITE(!Z_ENABLE_ON)
-#else
-  #define Z_enable()  NOOP
-  #define Z_disable() NOOP
-#endif
-
-#if AXIS_DRIVER_TYPE_Z2(L6470)
-  extern L6470 stepperZ2;
-  #define Z2_enable()  NOOP
-  #define Z2_disable() stepperZ2.free()
-#elif HAS_Z2_ENABLE
-  #define Z2_enable()  Z2_ENABLE_WRITE( Z_ENABLE_ON)
-  #define Z2_disable() Z2_ENABLE_WRITE(!Z_ENABLE_ON)
-#else
-  #define Z2_enable()  NOOP
-  #define Z2_disable() NOOP
-#endif
-
-#if AXIS_DRIVER_TYPE_Z3(L6470)
-  extern L6470 stepperZ3;
-  #define Z3_enable()  NOOP
-  #define Z3_disable() stepperZ3.free()
-#elif HAS_Z3_ENABLE
-  #define Z3_enable()  Z3_ENABLE_WRITE( Z_ENABLE_ON)
-  #define Z3_disable() Z3_ENABLE_WRITE(!Z_ENABLE_ON)
-#else
-  #define Z3_enable()  NOOP
-  #define Z3_disable() NOOP
-#endif
-
-#define  enable_Z() do{ Z_enable(); Z2_enable(); Z3_enable(); }while(0)
-#define disable_Z() do{ Z_disable(); Z2_disable(); Z3_disable(); CBI(axis_known_position, Z_AXIS); }while(0)
-
-//
-// Extruder Stepper enable / disable
-//
-
-// define the individual enables/disables
-#if AXIS_DRIVER_TYPE_E0(L6470)
-  extern L6470 stepperE0;
-  #define  E0_enable() NOOP
-  #define E0_disable() do{ stepperE0.free(); CBI(axis_known_position, E_AXIS); }while(0)
-#elif HAS_E0_ENABLE
-  #define  E0_enable() E0_ENABLE_WRITE( E_ENABLE_ON)
-  #define E0_disable() E0_ENABLE_WRITE(!E_ENABLE_ON)
-#else
-  #define  E0_enable() NOOP
-  #define E0_disable() NOOP
-#endif
-
-#if AXIS_DRIVER_TYPE_E1(L6470)
-  extern L6470 stepperE1;
-  #define  E1_enable() NOOP
-  #define E1_disable() do{ stepperE1.free(); CBI(axis_known_position, E_AXIS); }while(0)
-#elif E_STEPPERS > 1 && HAS_E1_ENABLE
-  #define  E1_enable() E1_ENABLE_WRITE( E_ENABLE_ON)
-  #define E1_disable() E1_ENABLE_WRITE(!E_ENABLE_ON)
-#else
-  #define  E1_enable() NOOP
-  #define E1_disable() NOOP
-#endif
-
-#if AXIS_DRIVER_TYPE_E2(L6470)
-  extern L6470 stepperE2;
-  #define  E2_enable() NOOP
-  #define E2_disable() do{ stepperE2.free(); CBI(axis_known_position, E_AXIS); }while(0)
-#elif E_STEPPERS > 2 && HAS_E2_ENABLE
-  #define  E2_enable() E2_ENABLE_WRITE( E_ENABLE_ON)
-  #define E2_disable() E2_ENABLE_WRITE(!E_ENABLE_ON)
-#else
-  #define  E2_enable() NOOP
-  #define E2_disable() NOOP
-#endif
-
-#if AXIS_DRIVER_TYPE_E3(L6470)
-  extern L6470 stepperE3;
-  #define  E3_enable() NOOP
-  #define E3_disable() do{ stepperE3.free(); CBI(axis_known_position, E_AXIS); }while(0)
-#elif E_STEPPERS > 3 && HAS_E3_ENABLE
-  #define  E3_enable() E3_ENABLE_WRITE( E_ENABLE_ON)
-  #define E3_disable() E3_ENABLE_WRITE(!E_ENABLE_ON)
-#else
-  #define  E3_enable() NOOP
-  #define E3_disable() NOOP
-#endif
-
-#if AXIS_DRIVER_TYPE_E4(L6470)
-  extern L6470 stepperE4;
-  #define  E4_enable() NOOP
-  #define E4_disable() do{ stepperE4.free(); CBI(axis_known_position, E_AXIS); }while(0)
-#elif E_STEPPERS > 4 && HAS_E4_ENABLE
-  #define  E4_enable() E4_ENABLE_WRITE( E_ENABLE_ON)
-  #define E4_disable() E4_ENABLE_WRITE(!E_ENABLE_ON)
-#else
-  #define  E4_enable() NOOP
-  #define E4_disable() NOOP
-#endif
-
-#if AXIS_DRIVER_TYPE_E5(L6470)
-  extern L6470 stepperE5;
-  #define  E5_enable() NOOP
-  #define E5_disable() do{ stepperE5.free(); CBI(axis_known_position, E_AXIS); }while(0)
-#elif E_STEPPERS > 5 && HAS_E5_ENABLE
-  #define  E5_enable() E5_ENABLE_WRITE( E_ENABLE_ON)
-  #define E5_disable() E5_ENABLE_WRITE(!E_ENABLE_ON)
-#else
-  #define  E5_enable() NOOP
-  #define E5_disable() NOOP
-#endif
-
-#if ENABLED(MIXING_EXTRUDER)
-
-  /**
-   * Mixing steppers synchronize their enable (and direction) together
-   */
-  #if MIXING_STEPPERS > 5
-    #define  enable_E0() { E0_enable();  E1_enable();  E2_enable();  E3_enable();  E4_enable();  E5_enable(); }
-    #define disable_E0() { E0_disable(); E1_disable(); E2_disable(); E3_disable(); E4_disable(); E5_disable(); }
-  #elif MIXING_STEPPERS > 4
-    #define  enable_E0() { E0_enable();  E1_enable();  E2_enable();  E3_enable();  E4_enable(); }
-    #define disable_E0() { E0_disable(); E1_disable(); E2_disable(); E3_disable(); E4_disable(); }
-  #elif MIXING_STEPPERS > 3
-    #define  enable_E0() { E0_enable();  E1_enable();  E2_enable();  E3_enable(); }
-    #define disable_E0() { E0_disable(); E1_disable(); E2_disable(); E3_disable(); }
-  #elif MIXING_STEPPERS > 2
-    #define  enable_E0() { E0_enable();  E1_enable();  E2_enable(); }
-    #define disable_E0() { E0_disable(); E1_disable(); E2_disable(); }
-  #else
-    #define  enable_E0() { E0_enable();  E1_enable(); }
-    #define disable_E0() { E0_disable(); E1_disable(); }
-  #endif
-  #define  enable_E1() NOOP
-  #define disable_E1() NOOP
-  #define  enable_E2() NOOP
-  #define disable_E2() NOOP
-  #define  enable_E3() NOOP
-  #define disable_E3() NOOP
-  #define  enable_E4() NOOP
-  #define disable_E4() NOOP
-  #define  enable_E5() NOOP
-  #define disable_E5() NOOP
-
-#else // !MIXING_EXTRUDER
-
-  #if HAS_E0_ENABLE
-    #define  enable_E0() E0_enable()
-    #define disable_E0() E0_disable()
-  #else
-    #define  enable_E0() NOOP
-    #define disable_E0() NOOP
-  #endif
-
-  #if E_STEPPERS > 1 && HAS_E1_ENABLE
-    #define  enable_E1() E1_enable()
-    #define disable_E1() E1_disable()
-  #else
-    #define  enable_E1() NOOP
-    #define disable_E1() NOOP
-  #endif
-
-  #if E_STEPPERS > 2 && HAS_E2_ENABLE
-    #define  enable_E2() E2_enable()
-    #define disable_E2() E2_disable()
-  #else
-    #define  enable_E2() NOOP
-    #define disable_E2() NOOP
-  #endif
-
-  #if E_STEPPERS > 3 && HAS_E3_ENABLE
-    #define  enable_E3() E3_enable()
-    #define disable_E3() E3_disable()
-  #else
-    #define  enable_E3() NOOP
-    #define disable_E3() NOOP
-  #endif
-
-  #if E_STEPPERS > 4 && HAS_E4_ENABLE
-    #define  enable_E4() E4_enable()
-    #define disable_E4() E4_disable()
-  #else
-    #define  enable_E4() NOOP
-    #define disable_E4() NOOP
-  #endif
-
-  #if E_STEPPERS > 5 && HAS_E5_ENABLE
-    #define  enable_E5() E5_enable()
-    #define disable_E5() E5_disable()
-  #else
-    #define  enable_E5() NOOP
-    #define disable_E5() NOOP
-  #endif
-
-#endif // !MIXING_EXTRUDER
-
-#if ENABLED(EXPERIMENTAL_I2CBUS)
-  #include "feature/twibus.h"
-  extern TWIBus i2c;
-#endif
-
-#if ENABLED(G38_PROBE_TARGET)
-  extern uint8_t G38_move;          // Flag to tell the ISR that G38 is in progress, and the type
-  extern bool G38_did_trigger;      // Flag from the ISR to indicate the endstop changed
-#endif
-
-/**
- * The axis order in all axis related arrays is X, Y, Z, E
- */
-void enable_e_steppers();
-void enable_all_steppers();
-void disable_e_stepper(const uint8_t e);
-void disable_e_steppers();
-void disable_all_steppers();
-
-void kill(PGM_P const lcd_error=nullptr, PGM_P const lcd_component=nullptr, const bool steppers_off=false);
-void minkill(const bool steppers_off=false);
-
-void quickstop_stepper();
-
-extern bool Running;
-inline bool IsRunning() { return  Running; }
-inline bool IsStopped() { return !Running; }
-
-bool printingIsActive();
-bool printingIsPaused();
-void startOrResumeJob();
-
-extern bool wait_for_heatup;
-
-#if HAS_RESUME_CONTINUE
-  extern bool wait_for_user;
-#endif
-
-#if HAS_AUTO_REPORTING || ENABLED(HOST_KEEPALIVE_FEATURE)
-  extern bool suspend_auto_report;
-#endif
-
-// Inactivity shutdown timer
-extern millis_t max_inactive_time, stepper_inactive_time;
-
-#if ENABLED(USE_CONTROLLER_FAN)
-  extern uint8_t controllerfan_speed;
-#endif
-
-#if ENABLED(PSU_CONTROL)
-  extern bool powersupply_on;
-  #define PSU_PIN_ON()  do{ OUT_WRITE(PS_ON_PIN,  PSU_ACTIVE_HIGH); powersupply_on = true; }while(0)
-  #define PSU_PIN_OFF() do{ OUT_WRITE(PS_ON_PIN, !PSU_ACTIVE_HIGH); powersupply_on = false; }while(0)
-  #if ENABLED(AUTO_POWER_CONTROL)
-    #define PSU_ON()  powerManager.power_on()
-    #define PSU_OFF() powerManager.power_off()
-  #else
-    #define PSU_ON()  PSU_PIN_ON()
-    #define PSU_OFF() PSU_PIN_OFF()
-  #endif
-#endif
-
-bool pin_is_protected(const pin_t pin);
-void protected_pin_err();
-
-#if HAS_SUICIDE
-  inline void suicide() { OUT_WRITE(SUICIDE_PIN, SUICIDE_PIN_INVERTING); }
-#endif
-
-#if ENABLED(G29_RETRY_AND_RECOVER)
-  void event_probe_recover();
-  void event_probe_failure();
-#endif
-
-extern const char NUL_STR[], G28_STR[], M21_STR[], M23_STR[], M24_STR[],
-                  SP_X_STR[], SP_Y_STR[], SP_Z_STR[], SP_E_STR[];

Marlin/src/MarlinCore.cpp

@@ -28,7 +28,7 @@
  *  - https://github.com/grbl/grbl
  */
 
-#include "Marlin.h"
+#include "MarlinCore.h"
 
 #include "core/utility.h"
 #include "lcd/ultralcd.h"
@@ -177,11 +177,12 @@
   #include "feature/prusa_MMU2/mmu2.h"
 #endif
 
-#if HAS_DRIVER(L6470)
-  #include "libs/L6470/L6470_Marlin.h"
+#if HAS_L64XX
+  #include "libs/L64XX/L64XX_Marlin.h"
 #endif
 
 const char NUL_STR[] PROGMEM = "",
+           M112_KILL_STR[] PROGMEM = "M112 Shutdown",
            G28_STR[] PROGMEM = "G28",
            M21_STR[] PROGMEM = "M21",
            M23_STR[] PROGMEM = "M23 %s",
@@ -406,7 +407,7 @@ void startOrResumeJob() {
     thermalManager.zero_fan_speeds();
     wait_for_heatup = false;
     #if ENABLED(POWER_LOSS_RECOVERY)
-      card.removeJobRecoveryFile();
+      recovery.purge();
     #endif
     #ifdef EVENT_GCODE_SD_STOP
       queue.inject_P(PSTR(EVENT_GCODE_SD_STOP));
@@ -553,7 +554,7 @@ void manage_inactivity(const bool ignore_stepper_queue/*=false*/) {
         bool oldstatus;
         switch (active_extruder) {
           default:
-          #define _CASE_EN(N) case N: oldstatus = E##N_ENABLE_READ(); enable_E##N(); break;
+          #define _CASE_EN(N) case N: oldstatus = E##N##_ENABLE_READ(); enable_E##N(); break;
           REPEAT(E_STEPPERS, _CASE_EN);
         }
       #endif
@@ -605,7 +606,7 @@ void manage_inactivity(const bool ignore_stepper_queue/*=false*/) {
   #endif
 
   #if ENABLED(MONITOR_L6470_DRIVER_STATUS)
-    L6470.monitor_driver();
+    L64xxManager.monitor_driver();
   #endif
 
   // Limit check_axes_activity frequency to 10Hz
@@ -618,7 +619,7 @@ void manage_inactivity(const bool ignore_stepper_queue/*=false*/) {
   #if PIN_EXISTS(FET_SAFETY)
     static millis_t FET_next;
     if (ELAPSED(ms, FET_next)) {
-      FET_next = ms + FET_SAFETY_DELAY;  // 2uS pulse every FET_SAFETY_DELAY mS
+      FET_next = ms + FET_SAFETY_DELAY;  // 2µs pulse every FET_SAFETY_DELAY mS
       OUT_WRITE(FET_SAFETY_PIN, !FET_SAFETY_INVERTED);
       DELAY_US(2);
       WRITE(FET_SAFETY_PIN, FET_SAFETY_INVERTED);
@@ -822,8 +823,12 @@ void setup() {
 
   HAL_init();
 
-  #if HAS_DRIVER(L6470)
-    L6470.init();         // setup SPI and then init chips
+  #if HAS_L64XX
+    L64xxManager.init();  // Set up SPI, init drivers
+  #endif
+
+  #if ENABLED(SMART_EFFECTOR) && PIN_EXISTS(SMART_EFFECTOR_MOD)
+    OUT_WRITE(SMART_EFFECTOR_MOD_PIN, LOW);   // Put Smart Effector into NORMAL mode
   #endif
 
   #if ENABLED(MAX7219_DEBUG)
@@ -1128,10 +1133,9 @@ void setup() {
  *  - Call inactivity manager
  */
 void loop() {
+  do {
 
-  for (;;) {
-
-    idle(); // Do an idle first so boot is slightly faster
+    idle();
 
     #if ENABLED(SDSUPPORT)
       card.checkautostart();
@@ -1141,5 +1145,10 @@ void loop() {
     queue.advance();
 
     endstops.event_handler();
-  }
+
+  } while (false        // Return to caller for best compatibility
+    #ifdef __AVR__
+      || true           // Loop forever on slower (AVR) boards
+    #endif
+  );
 }

Marlin/src/MarlinCore.h

@@ -0,0 +1,124 @@
+/**
+ * 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
+
+#include "inc/MarlinConfig.h"
+
+#ifdef DEBUG_GCODE_PARSER
+  #include "gcode/parser.h"
+#endif
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#if HAS_L64XX
+  #include "libs/L64XX/L64XX_Marlin.h"
+  extern uint8_t axis_known_position;
+#endif
+
+void stop();
+
+void idle(
+  #if ENABLED(ADVANCED_PAUSE_FEATURE)
+    bool no_stepper_sleep = false  // pass true to keep steppers from disabling on timeout
+  #endif
+);
+
+void manage_inactivity(const bool ignore_stepper_queue=false);
+
+#if ENABLED(EXPERIMENTAL_I2CBUS)
+  #include "feature/twibus.h"
+  extern TWIBus i2c;
+#endif
+
+#if ENABLED(G38_PROBE_TARGET)
+  extern uint8_t G38_move;          // Flag to tell the ISR that G38 is in progress, and the type
+  extern bool G38_did_trigger;      // Flag from the ISR to indicate the endstop changed
+#endif
+
+/**
+ * The axis order in all axis related arrays is X, Y, Z, E
+ */
+void enable_e_steppers();
+void enable_all_steppers();
+void disable_e_stepper(const uint8_t e);
+void disable_e_steppers();
+void disable_all_steppers();
+
+void kill(PGM_P const lcd_error=nullptr, PGM_P const lcd_component=nullptr, const bool steppers_off=false);
+void minkill(const bool steppers_off=false);
+
+void quickstop_stepper();
+
+extern bool Running;
+inline bool IsRunning() { return  Running; }
+inline bool IsStopped() { return !Running; }
+
+bool printingIsActive();
+bool printingIsPaused();
+void startOrResumeJob();
+
+extern bool wait_for_heatup;
+
+#if HAS_RESUME_CONTINUE
+  extern bool wait_for_user;
+#endif
+
+#if HAS_AUTO_REPORTING || ENABLED(HOST_KEEPALIVE_FEATURE)
+  extern bool suspend_auto_report;
+#endif
+
+// Inactivity shutdown timer
+extern millis_t max_inactive_time, stepper_inactive_time;
+
+#if ENABLED(USE_CONTROLLER_FAN)
+  extern uint8_t controllerfan_speed;
+#endif
+
+#if ENABLED(PSU_CONTROL)
+  extern bool powersupply_on;
+  #define PSU_PIN_ON()  do{ OUT_WRITE(PS_ON_PIN,  PSU_ACTIVE_HIGH); powersupply_on = true; }while(0)
+  #define PSU_PIN_OFF() do{ OUT_WRITE(PS_ON_PIN, !PSU_ACTIVE_HIGH); powersupply_on = false; }while(0)
+  #if ENABLED(AUTO_POWER_CONTROL)
+    #define PSU_ON()  powerManager.power_on()
+    #define PSU_OFF() powerManager.power_off()
+  #else
+    #define PSU_ON()  PSU_PIN_ON()
+    #define PSU_OFF() PSU_PIN_OFF()
+  #endif
+#endif
+
+bool pin_is_protected(const pin_t pin);
+void protected_pin_err();
+
+#if HAS_SUICIDE
+  inline void suicide() { OUT_WRITE(SUICIDE_PIN, SUICIDE_PIN_INVERTING); }
+#endif
+
+#if ENABLED(G29_RETRY_AND_RECOVER)
+  void event_probe_recover();
+  void event_probe_failure();
+#endif
+
+extern const char NUL_STR[], M112_KILL_STR[], G28_STR[], M21_STR[], M23_STR[], M24_STR[],
+                  SP_X_STR[], SP_Y_STR[], SP_Z_STR[], SP_E_STR[];

Marlin/src/core/boards.h

@@ -64,7 +64,7 @@
 #define BOARD_MKS_BASE_HEROIC         1108  // MKS BASE 1.0 with Heroic HR4982 stepper drivers
 #define BOARD_MKS_GEN_13              1109  // MKS GEN v1.3 or 1.4
 #define BOARD_MKS_GEN_L               1110  // MKS GEN L
-#define BOARD_KFB_2                   1111  // Bigtreetech or BIQU KFB2.0
+#define BOARD_KFB_2                   1111  // BigTreeTech or BIQU KFB2.0
 #define BOARD_ZRIB_V20                1112  // zrib V2.0 control board (Chinese knock off RAMPS replica)
 #define BOARD_FELIX2                  1113  // Felix 2.0+ Electronics Board (RAMPS like)
 #define BOARD_RIGIDBOARD              1114  // Invent-A-Part RigidBoard
@@ -90,17 +90,18 @@
 #define BOARD_RAMPS_ENDER_4           1134  // Creality: Ender-4, CR-8
 #define BOARD_RAMPS_CREALITY          1135  // Creality: CR10S, CR20, CR-X
 #define BOARD_RAMPS_DAGOMA            1136  // Dagoma F5
-#define BOARD_FYSETC_F6_13            1137  // FYSETC F6
-#define BOARD_DUPLICATOR_I3_PLUS      1138  // Wanhao Duplicator i3 Plus
-#define BOARD_VORON                   1139  // VORON Design
-#define BOARD_TRONXY_V3_1_0           1140  // Tronxy TRONXY-V3-1.0
-#define BOARD_Z_BOLT_X_SERIES         1141  // Z-Bolt X Series
-#define BOARD_TT_OSCAR                1142  // TT OSCAR
-#define BOARD_OVERLORD                1143  // Overlord/Overlord Pro
-#define BOARD_HJC2560C_REV1           1144  // ADIMLab Gantry v1
-#define BOARD_HJC2560C_REV2           1145  // ADIMLab Gantry v2
-#define BOARD_TANGO                   1146  // BIQU Tango V1
-#define BOARD_MKS_GEN_L_V2            1147  // MKS GEN L V2
+#define BOARD_FYSETC_F6_13            1137  // FYSETC F6 1.3
+#define BOARD_FYSETC_F6_14            1138  // FYSETC F6 1.4
+#define BOARD_DUPLICATOR_I3_PLUS      1139  // Wanhao Duplicator i3 Plus
+#define BOARD_VORON                   1140  // VORON Design
+#define BOARD_TRONXY_V3_1_0           1141  // Tronxy TRONXY-V3-1.0
+#define BOARD_Z_BOLT_X_SERIES         1142  // Z-Bolt X Series
+#define BOARD_TT_OSCAR                1143  // TT OSCAR
+#define BOARD_OVERLORD                1144  // Overlord/Overlord Pro
+#define BOARD_HJC2560C_REV1           1145  // ADIMLab Gantry v1
+#define BOARD_HJC2560C_REV2           1146  // ADIMLab Gantry v2
+#define BOARD_TANGO                   1147  // BIQU Tango V1
+#define BOARD_MKS_GEN_L_V2            1148  // MKS GEN L V2
 
 //
 // RAMBo and derivatives
@@ -138,6 +139,7 @@
 #define BOARD_GT2560_V3_A20           1318  // Geeetech GT2560 Rev B for A20(M/D)
 #define BOARD_EINSTART_S              1319  // Einstart retrofit
 #define BOARD_WANHAO_ONEPLUS          1320  // Wanhao 0ne+ i3 Mini
+#define BOARD_LEAPFROG_XEED2015       1321  // Leapfrog Xeed 2015
 
 //
 // ATmega1281, ATmega2561
@@ -201,21 +203,28 @@
 #define BOARD_RAMPS_14_RE_ARM_SF      2004  // Re-ARM with RAMPS 1.4 (Power outputs: Spindle, Controller Fan)
 #define BOARD_MKS_SBASE               2005  // MKS-Sbase (Power outputs: Hotend0, Hotend1, Bed, Fan)
 #define BOARD_AZSMZ_MINI              2006  // AZSMZ Mini
-#define BOARD_AZTEEG_X5_GT            2007  // Azteeg X5 GT (Power outputs: Hotend0, Hotend1, Bed, Fan)
-#define BOARD_BIQU_BQ111_A4           2008  // BIQU BQ111-A4 (Power outputs: Hotend, Fan, Bed)
-#define BOARD_SELENA_COMPACT          2009  // Selena Compact (Power outputs: Hotend0, Hotend1, Bed0, Bed1, Fan0, Fan1)
-#define BOARD_COHESION3D_REMIX        2010  // Cohesion3D ReMix
-#define BOARD_COHESION3D_MINI         2011  // Cohesion3D Mini
-#define BOARD_SMOOTHIEBOARD           2012  // Smoothieboard
-#define BOARD_AZTEEG_X5_MINI_WIFI     2013  // Azteeg X5 Mini Wifi (Power outputs: Hotend0, Bed, Fan)
-#define BOARD_BIGTREE_SKR_V1_1        2014  // BIGTREE SKR_V1.1 (Power outputs: Hotend0,Hotend1, Fan, Bed)
-#define BOARD_BIQU_B300_V1_0          2015  // BIQU B300_V1.0 (Power outputs: Hotend0, Fan, Bed, SPI Driver)
-#define BOARD_BIGTREE_SKR_V1_3        2016  // BIGTREE SKR_V1.3 (Power outputs: Hotend0, Hotend1, Fan, Bed)
-#define BOARD_AZTEEG_X5_MINI          2017  // Azteeg X5 Mini (Power outputs: Hotend0, Bed, Fan)
-#define BOARD_MKS_SGEN                2018  // MKS-SGen (Power outputs: Hotend0, Hotend1, Bed, Fan)
-#define BOARD_MKS_SGEN_L              2019  // MKS-SGen-L (Power outputs: Hotend0, Hotend1, Bed, Fan)
-#define BOARD_TH3D_EZBOARD            2020  // TH3D EZBoard v1.0
-#define BOARD_GMARSH_X6_REV1          2021  // GMARSH X6 board, revision 1 prototype
+#define BOARD_BIQU_BQ111_A4           2007  // BIQU BQ111-A4 (Power outputs: Hotend, Fan, Bed)
+#define BOARD_SELENA_COMPACT          2008  // Selena Compact (Power outputs: Hotend0, Hotend1, Bed0, Bed1, Fan0, Fan1)
+#define BOARD_BIQU_B300_V1_0          2009  // BIQU B300_V1.0 (Power outputs: Hotend0, Fan, Bed, SPI Driver)
+#define BOARD_MKS_SGEN_L              2010  // MKS-SGen-L (Power outputs: Hotend0, Hotend1, Bed, Fan)
+#define BOARD_GMARSH_X6_REV1          2011  // GMARSH X6 board, revision 1 prototype
+#define BOARD_BIGTREE_SKR_V1_1        2012  // BigTreeTech SKR v1.1 (Power outputs: Hotend0, Hotend1, Fan, Bed)
+#define BOARD_BIGTREE_SKR_V1_3        2013  // BigTreeTech SKR v1.3 (Power outputs: Hotend0, Hotend1, Fan, Bed)
+#define BOARD_BIGTREE_SKR_V1_4        2014  // BigTreeTech SKR v1.4 (Power outputs: Hotend0, Hotend1, Fan, Bed)
+
+//
+// LPC1769 ARM Cortex M3
+//
+
+#define BOARD_MKS_SGEN                2500  // MKS-SGen (Power outputs: Hotend0, Hotend1, Bed, Fan)
+#define BOARD_AZTEEG_X5_GT            2501  // Azteeg X5 GT (Power outputs: Hotend0, Hotend1, Bed, Fan)
+#define BOARD_AZTEEG_X5_MINI          2502  // Azteeg X5 Mini (Power outputs: Hotend0, Bed, Fan)
+#define BOARD_AZTEEG_X5_MINI_WIFI     2503  // Azteeg X5 Mini Wifi (Power outputs: Hotend0, Bed, Fan)
+#define BOARD_COHESION3D_REMIX        2504  // Cohesion3D ReMix
+#define BOARD_COHESION3D_MINI         2505  // Cohesion3D Mini
+#define BOARD_SMOOTHIEBOARD           2506  // Smoothieboard
+#define BOARD_TH3D_EZBOARD            2507  // TH3D EZBoard v1.0
+#define BOARD_BIGTREE_SKR_V1_4_TURBO  2508  // BigTreeTech SKR v1.4 TURBO (Power outputs: Hotend0, Hotend1, Fan, Bed)
 
 //
 // SAM3X8E ARM Cortex M3
@@ -247,6 +256,7 @@
 #define BOARD_ARCHIM1                 3023  // UltiMachine Archim1 (with DRV8825 drivers)
 #define BOARD_ARCHIM2                 3024  // UltiMachine Archim2 (with TMC2130 drivers)
 #define BOARD_ALLIGATOR               3025  // Alligator Board R2
+#define BOARD_CNCONTROLS_15D          3026  // Cartesio CN Controls V15 on DUE
 
 //
 // SAM3X8C ARM Cortex M3
@@ -269,18 +279,21 @@
 #define BOARD_MKS_ROBIN_MINI          4007  // MKS Robin Mini (STM32F103VET6)
 #define BOARD_MKS_ROBIN_NANO          4008  // MKS Robin Nano (STM32F103VET6)
 #define BOARD_MKS_ROBIN_LITE          4009  // MKS Robin Lite/Lite2 (STM32F103RCT6)
-#define BOARD_BIGTREE_SKR_MINI_V1_1   4010  // BigTreeTech SKR Mini v1.1 (STM32F103RC)
-#define BOARD_BTT_SKR_MINI_E3_V1_0    4011  // BigTreeTech SKR Mini E3 (STM32F103RC)
-#define BOARD_BTT_SKR_MINI_E3_V1_2    4012  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)
-#define BOARD_BIGTREE_SKR_E3_DIP      4013  // BigTreeTech SKR E3 DIP V1.0 (STM32F103RC / STM32F103RE)
-#define BOARD_JGAURORA_A5S_A1         4014  // JGAurora A5S A1 (STM32F103ZET6)
-#define BOARD_FYSETC_AIO_II           4015  // FYSETC AIO_II
-#define BOARD_FYSETC_CHEETAH          4016  // FYSETC Cheetah
-#define BOARD_FYSETC_CHEETAH_V12      4017  // FYSETC Cheetah V1.2
-#define BOARD_LONGER3D_LK             4018  // Alfawise U20/U20+/U30 (Longer3D LK1/2) / STM32F103VET6
-#define BOARD_GTM32_MINI              4019  // STM32F103VET6 controller
-#define BOARD_GTM32_MINI_A30          4020  // STM32F103VET6 controller
-#define BOARD_GTM32_REV_B             4021  // STM32F103VET6 controller
+#define BOARD_MKS_ROBIN_LITE3         4010  // MKS Robin Lite3 (STM32F103RCT6)
+#define BOARD_MKS_ROBIN_PRO           4011  // MKS Robin Pro (STM32F103ZET6)
+#define BOARD_BIGTREE_SKR_MINI_V1_1   4012  // BigTreeTech SKR Mini v1.1 (STM32F103RC)
+#define BOARD_BTT_SKR_MINI_E3_V1_0    4013  // BigTreeTech SKR Mini E3 (STM32F103RC)
+#define BOARD_BTT_SKR_MINI_E3_V1_2    4014  // BigTreeTech SKR Mini E3 V1.2 (STM32F103RC)
+#define BOARD_BIGTREE_SKR_E3_DIP      4015  // BigTreeTech SKR E3 DIP V1.0 (STM32F103RC / STM32F103RE)
+#define BOARD_JGAURORA_A5S_A1         4016  // JGAurora A5S A1 (STM32F103ZET6)
+#define BOARD_FYSETC_AIO_II           4017  // FYSETC AIO_II
+#define BOARD_FYSETC_CHEETAH          4018  // FYSETC Cheetah
+#define BOARD_FYSETC_CHEETAH_V12      4019  // FYSETC Cheetah V1.2
+#define BOARD_LONGER3D_LK             4020  // Alfawise U20/U20+/U30 (Longer3D LK1/2) / STM32F103VET6
+#define BOARD_GTM32_MINI              4021  // STM32F103VET6 controller
+#define BOARD_GTM32_MINI_A30          4022  // STM32F103VET6 controller
+#define BOARD_GTM32_REV_B             4023  // STM32F103VET6 controller
+
 
 //
 // ARM Cortex-M4F
@@ -299,13 +312,15 @@
 #define BOARD_RUMBA32                 4203  // RUMBA32 STM32F4-based controller
 #define BOARD_BLACK_STM32F407VE       4204  // BLACK_STM32F407VE
 #define BOARD_BLACK_STM32F407ZE       4205  // BLACK_STM32F407ZE
-#define BOARD_STEVAL                  4206  // STEVAL-3DP001V1 3D PRINTER BOARD
+#define BOARD_STEVAL_3DP001V1         4206  // STEVAL-3DP001V1 3D PRINTER BOARD
 #define BOARD_BIGTREE_SKR_PRO_V1_1    4207  // BigTreeTech SKR Pro v1.1 (STM32F407ZG)
 #define BOARD_BIGTREE_BTT002_V1_0     4208  // BigTreeTech BTT002 v1.0 (STM32F407VE)
 #define BOARD_LERDGE_K                4209  // Lerdge K (STM32F407ZG)
 #define BOARD_LERDGE_X                4210  // Lerdge X (STM32F407VE)
 #define BOARD_VAKE403D                4211  // VAkE 403D (STM32F446VET6)
 #define BOARD_FYSETC_S6               4212  // FYSETC S6 board
+#define BOARD_FLYF407ZG               4213  // FLYF407ZG board (STM32F407ZG)
+#define BOARD_MKS_ROBIN2              4214  // MKS_ROBIN2 (STM32F407ZE)
 
 //
 // ARM Cortex M7
@@ -318,6 +333,8 @@
 // Espressif ESP32 WiFi
 //
 #define BOARD_ESPRESSIF_ESP32         6000
+#define BOARD_MRR_ESPA                6001
+#define BOARD_MRR_ESPE                6002
 
 //
 // Simulations

Marlin/src/core/drivers.h

@@ -23,30 +23,33 @@
 
 #include "../inc/MarlinConfigPre.h"
 
-#define _A4988              0x001
-#define _A5984              0x002
-#define _DRV8825            0x003
-#define _LV8729             0x004
-#define _L6470              0x105
-#define _TB6560             0x006
-#define _TB6600             0x007
-#define _TMC2100            0x008
-#define _TMC2130            2130
-#define _TMC2130_STANDALONE 0x009
-#define _TMC2160            2160
-#define _TMC2160_STANDALONE 2161
-#define _TMC2208            2208
-#define _TMC2208_STANDALONE 0x00A
-#define _TMC2209            2209
-#define _TMC2209_STANDALONE 0x00D
-#define _TMC26X             0x10B
-#define _TMC26X_STANDALONE  0x00B
-#define _TMC2660            2660
-#define _TMC2660_STANDALONE 0x00C
-#define _TMC5130            5130
-#define _TMC5130_STANDALONE 5131
-#define _TMC5160            5160
-#define _TMC5160_STANDALONE 5161
+#define _A4988              0x4988
+#define _A5984              0x5984
+#define _DRV8825            0x8825
+#define _LV8729             0x8729
+#define _L6470              0x6470
+#define _L6474              0x6474
+#define _L6480              0x6480
+#define _POWERSTEP01        0xF00D
+#define _TB6560             0x6560
+#define _TB6600             0x6600
+#define _TMC2100            0x2100
+#define _TMC2130            0x2130A
+#define _TMC2130_STANDALONE 0x2130B
+#define _TMC2160            0x2160A
+#define _TMC2160_STANDALONE 0x2160B
+#define _TMC2208            0x2208A
+#define _TMC2208_STANDALONE 0x2208B
+#define _TMC2209            0x2209A
+#define _TMC2209_STANDALONE 0x2209B
+#define _TMC26X             0x2600A
+#define _TMC26X_STANDALONE  0x2600B
+#define _TMC2660            0x2660A
+#define _TMC2660_STANDALONE 0x2660B
+#define _TMC5130            0x5130A
+#define _TMC5130_STANDALONE 0x5130B
+#define _TMC5160            0x5160A
+#define _TMC5160_STANDALONE 0x5160B
 
 #define _DRIVER_ID(V) _CAT(_, V)
 #define _AXIS_DRIVER_TYPE(A,T) (_DRIVER_ID(A##_DRIVER_TYPE) == _CAT(_, T))
@@ -54,26 +57,35 @@
 #define AXIS_DRIVER_TYPE_X(T) _AXIS_DRIVER_TYPE(X,T)
 #define AXIS_DRIVER_TYPE_Y(T) _AXIS_DRIVER_TYPE(Y,T)
 #define AXIS_DRIVER_TYPE_Z(T) _AXIS_DRIVER_TYPE(Z,T)
-#define AXIS_DRIVER_TYPE_X2(T) (EITHER(X_DUAL_STEPPER_DRIVERS, DUAL_X_CARRIAGE) && _AXIS_DRIVER_TYPE(X2,T))
+#if EITHER(X_DUAL_STEPPER_DRIVERS, DUAL_X_CARRIAGE)
+  #define AXIS_DRIVER_TYPE_X2(T) _AXIS_DRIVER_TYPE(X2,T)
+#else
+  #define AXIS_DRIVER_TYPE_X2(T) false
+#endif
 #define AXIS_DRIVER_TYPE_Y2(T) (ENABLED(Y_DUAL_STEPPER_DRIVERS) && _AXIS_DRIVER_TYPE(Y2,T))
-#define AXIS_DRIVER_TYPE_Z2(T) (Z_MULTI_STEPPER_DRIVERS && _AXIS_DRIVER_TYPE(Z2,T))
-#define AXIS_DRIVER_TYPE_Z3(T) (ENABLED(Z_TRIPLE_STEPPER_DRIVERS) && _AXIS_DRIVER_TYPE(Z3,T))
+#define AXIS_DRIVER_TYPE_Z2(T) (NUM_Z_STEPPER_DRIVERS >= 2 && _AXIS_DRIVER_TYPE(Z2,T))
+#define AXIS_DRIVER_TYPE_Z3(T) (NUM_Z_STEPPER_DRIVERS >= 3 && _AXIS_DRIVER_TYPE(Z3,T))
+#define AXIS_DRIVER_TYPE_Z4(T) (NUM_Z_STEPPER_DRIVERS >= 4 && _AXIS_DRIVER_TYPE(Z4,T))
 #define AXIS_DRIVER_TYPE_E0(T) (E_STEPPERS > 0 && _AXIS_DRIVER_TYPE(E0,T))
 #define AXIS_DRIVER_TYPE_E1(T) (E_STEPPERS > 1 && _AXIS_DRIVER_TYPE(E1,T))
 #define AXIS_DRIVER_TYPE_E2(T) (E_STEPPERS > 2 && _AXIS_DRIVER_TYPE(E2,T))
 #define AXIS_DRIVER_TYPE_E3(T) (E_STEPPERS > 3 && _AXIS_DRIVER_TYPE(E3,T))
 #define AXIS_DRIVER_TYPE_E4(T) (E_STEPPERS > 4 && _AXIS_DRIVER_TYPE(E4,T))
 #define AXIS_DRIVER_TYPE_E5(T) (E_STEPPERS > 5 && _AXIS_DRIVER_TYPE(E5,T))
+#define AXIS_DRIVER_TYPE_E6(T) (E_STEPPERS > 6 && _AXIS_DRIVER_TYPE(E6,T))
+#define AXIS_DRIVER_TYPE_E7(T) (E_STEPPERS > 7 && _AXIS_DRIVER_TYPE(E7,T))
 
 #define AXIS_DRIVER_TYPE(A,T) AXIS_DRIVER_TYPE_##A(T)
 
 #define HAS_E_DRIVER(T) (  AXIS_DRIVER_TYPE_E0(T) || AXIS_DRIVER_TYPE_E1(T) \
                         || AXIS_DRIVER_TYPE_E2(T) || AXIS_DRIVER_TYPE_E3(T) \
-                        || AXIS_DRIVER_TYPE_E4(T) || AXIS_DRIVER_TYPE_E5(T) )
+                        || AXIS_DRIVER_TYPE_E4(T) || AXIS_DRIVER_TYPE_E5(T) \
+                        || AXIS_DRIVER_TYPE_E6(T) || AXIS_DRIVER_TYPE_E7(T) )
 
 #define HAS_DRIVER(T) (    AXIS_DRIVER_TYPE_X(T)  || AXIS_DRIVER_TYPE_X2(T) \
                         || AXIS_DRIVER_TYPE_Y(T)  || AXIS_DRIVER_TYPE_Y2(T) \
-                        || AXIS_DRIVER_TYPE_Z(T)  || AXIS_DRIVER_TYPE_Z2(T) || AXIS_DRIVER_TYPE_Z3(T) \
+                        || AXIS_DRIVER_TYPE_Z(T)  || AXIS_DRIVER_TYPE_Z2(T) \
+                        || AXIS_DRIVER_TYPE_Z3(T) || AXIS_DRIVER_TYPE_Z4(T) \
                         || HAS_E_DRIVER(T) )
 
 // Test for supported TMC drivers that require advanced configuration
@@ -86,6 +98,18 @@
                        || HAS_DRIVER(TMC5130) \
                        || HAS_DRIVER(TMC5160) )
 
+#define HAS_TRINAMIC_STANDALONE (    HAS_DRIVER(TMC2130_STANDALONE) \
+                                  || HAS_DRIVER(TMC2208_STANDALONE) \
+                                  || HAS_DRIVER(TMC2209_STANDALONE) \
+                                  || HAS_DRIVER(TMC26X_STANDALONE)  \
+                                  || HAS_DRIVER(TMC2660_STANDALONE) \
+                                  || HAS_DRIVER(TMC5130_STANDALONE) \
+                                  || HAS_DRIVER(TMC5160_STANDALONE) \
+                                  || HAS_DRIVER(TMC2160_STANDALONE) )
+
+#define HAS_TMCX1X0 (    HAS_DRIVER(TMC2130) || HAS_DRIVER(TMC2160) \
+                      || HAS_DRIVER(TMC5130) || HAS_DRIVER(TMC5160))
+
 #define HAS_TMC220x (HAS_DRIVER(TMC2208) || HAS_DRIVER(TMC2209))
 
 #define AXIS_IS_TMC(A)   (    AXIS_DRIVER_TYPE(A,TMC2130) \
@@ -107,6 +131,8 @@
 #define AXIS_HAS_UART(A) (    AXIS_DRIVER_TYPE(A,TMC2208) \
                            || AXIS_DRIVER_TYPE(A,TMC2209) )
 
+#define AXIS_HAS_SW_SERIAL(A) ((AXIS_HAS_UART(A) && !defined(A##_HARDWARE_SERIAL)))
+
 #define AXIS_HAS_STALLGUARD(A)   (    AXIS_DRIVER_TYPE(A,TMC2130) \
                                    || AXIS_DRIVER_TYPE(A,TMC2160) \
                                    || AXIS_DRIVER_TYPE(A,TMC2209) \
@@ -121,19 +147,20 @@
                                    || AXIS_DRIVER_TYPE(A,TMC5130) \
                                    || AXIS_DRIVER_TYPE(A,TMC5160) )
 
-#define HAS_TMC_E_DRIVER (    HAS_E_DRIVER(TMC2130) \
-                           || HAS_E_DRIVER(TMC2160) \
-                           || HAS_E_DRIVER(TMC2660) \
-                           || HAS_E_DRIVER(TMC2209) \
-                           || HAS_E_DRIVER(TMC5130) \
-                           || HAS_E_DRIVER(TMC5160) )
+#define ANY_AXIS_HAS(T) (    AXIS_HAS_##T(X)  || AXIS_HAS_##T(X2) \
+                          || AXIS_HAS_##T(Y)  || AXIS_HAS_##T(Y2) \
+                          || AXIS_HAS_##T(Z)  || AXIS_HAS_##T(Z2) \
+                          || AXIS_HAS_##T(Z3) \
+                          || AXIS_HAS_##T(E0) || AXIS_HAS_##T(E1) \
+                          || AXIS_HAS_##T(E2) || AXIS_HAS_##T(E3) \
+                          || AXIS_HAS_##T(E4) || AXIS_HAS_##T(E5) \
+                          || AXIS_HAS_##T(E6) || AXIS_HAS_##T(E7) )
+
+#define HAS_STEALTHCHOP    ANY_AXIS_HAS(STEALTHCHOP)
+#define HAS_STALLGUARD     ANY_AXIS_HAS(STALLGUARD)
+#define TMC_HAS_SPI        ANY_AXIS_HAS(SPI)
+#define TMC_HAS_SW_SERIAL  ANY_AXIS_HAS(SW_SERIAL)
 
-#define HAS_TMC_STANDALONE_E_DRIVER  (    HAS_E_DRIVER(TMC2130_STANDALONE) \
-                                       || HAS_E_DRIVER(TMC2160_STANDALONE) \
-                                       || HAS_E_DRIVER(TMC2660_STANDALONE) \
-                                       || HAS_E_DRIVER(TMC2209_STANDALONE) \
-                                       || HAS_E_DRIVER(TMC5130_STANDALONE) \
-                                       || HAS_E_DRIVER(TMC5160_STANDALONE) )
 //
 // Stretching 'drivers.h' to include LPC/SAMD51 SD options
 //
@@ -142,3 +169,8 @@
 #define _SDCARD_CUSTOM_CABLE 3
 #define _SDCARD_ID(V) _CAT(_SDCARD_, V)
 #define SD_CONNECTION_IS(V) (_SDCARD_ID(SDCARD_CONNECTION) == _SDCARD_ID(V))
+
+#define HAS_L64XX (HAS_DRIVER(L6470) || HAS_DRIVER(L6474) || HAS_DRIVER(L6480) || HAS_DRIVER(POWERSTEP01))
+#define HAS_L64XX_NOT_L6474 (HAS_L64XX && !HAS_DRIVER(L6474))
+
+#define AXIS_IS_L64XX(A) (AXIS_DRIVER_TYPE_##A(L6470) || AXIS_DRIVER_TYPE_##A(L6474) ||  AXIS_DRIVER_TYPE_##A(L6480) || AXIS_DRIVER_TYPE_##A(POWERSTEP01))

Marlin/src/core/language.h

@@ -195,6 +195,8 @@
 #define MSG_Z2_MAX                          "z2_max"
 #define MSG_Z3_MIN                          "z3_min"
 #define MSG_Z3_MAX                          "z3_max"
+#define MSG_Z4_MIN                          "z4_min"
+#define MSG_Z4_MAX                          "z4_max"
 #define MSG_Z_PROBE                         "z_probe"
 #define MSG_FILAMENT_RUNOUT_SENSOR          "filament"
 #define MSG_PROBE_OFFSET                    "Probe Offset"
@@ -220,6 +222,10 @@
 #define MSG_SOFT_MIN                        "  Min: "
 #define MSG_SOFT_MAX                        "  Max: "
 
+#define MSG_SAVED_POS                       "Position saved"
+#define MSG_RESTORING_POS                   "Restoring position"
+#define MSG_INVALID_POS_SLOT                "Invalid slot. Total: "
+
 #define MSG_SD_CANT_OPEN_SUBDIR             "Cannot open subdir "
 #define MSG_SD_INIT_FAIL                    "SD init fail"
 #define MSG_SD_VOL_INIT_FAIL                "volume.init failed"
@@ -252,10 +258,10 @@
 #define MSG_FILAMENT_CHANGE_INSERT_M108     "Insert filament and send M108"
 #define MSG_FILAMENT_CHANGE_WAIT_M108       "Send M108 to resume"
 
-#define MSG_STOP_BLTOUCH                    "STOP called because of BLTouch error - restart with M999"
-#define MSG_STOP_UNHOMED                    "STOP called because of unhomed error - restart with M999"
-#define MSG_KILL_INACTIVE_TIME              "KILL caused by too much inactive time - current command: "
-#define MSG_KILL_BUTTON                     "KILL caused by KILL button/pin"
+#define MSG_STOP_BLTOUCH                    "!! STOP called because of BLTouch error - restart with M999"
+#define MSG_STOP_UNHOMED                    "!! STOP called because of unhomed error - restart with M999"
+#define MSG_KILL_INACTIVE_TIME              "!! KILL caused by too much inactive time - current command: "
+#define MSG_KILL_BUTTON                     "!! KILL caused by KILL button/pin"
 
 // temperature.cpp strings
 #define MSG_PID_AUTOTUNE_PREFIX             "PID Autotune"
@@ -333,6 +339,7 @@
 #define MSG_Y2 "Y2"
 #define MSG_Z2 "Z2"
 #define MSG_Z3 "Z3"
+#define MSG_Z4 "Z4"
 
 #define LCD_STR_A MSG_A
 #define LCD_STR_B MSG_B
@@ -356,6 +363,8 @@
   #define LCD_STR_N3 "3"
   #define LCD_STR_N4 "4"
   #define LCD_STR_N5 "5"
+  #define LCD_STR_N6 "6"
+  #define LCD_STR_N7 "7"
 #else
   #define LCD_FIRST_TOOL '1'
   #define LCD_STR_N0 "1"
@@ -364,6 +373,8 @@
   #define LCD_STR_N3 "4"
   #define LCD_STR_N4 "5"
   #define LCD_STR_N5 "6"
+  #define LCD_STR_N6 "7"
+  #define LCD_STR_N7 "8"
 #endif
 
 #define LCD_STR_E0 "E" LCD_STR_N0
@@ -372,6 +383,8 @@
 #define LCD_STR_E3 "E" LCD_STR_N3
 #define LCD_STR_E4 "E" LCD_STR_N4
 #define LCD_STR_E5 "E" LCD_STR_N5
+#define LCD_STR_E6 "E" LCD_STR_N6
+#define LCD_STR_E7 "E" LCD_STR_N7
 
 #include "multi_language.h"   // Allow multiple languages
 

Marlin/src/core/serial.cpp

@@ -29,7 +29,7 @@ static const char errormagic[] PROGMEM = "Error:";
 static const char echomagic[]  PROGMEM = "echo:";
 
 #if NUM_SERIAL > 1
-  int8_t serial_port_index = SERIAL_PORT;
+  int8_t serial_port_index = 0;
 #endif
 
 void serialprintPGM(PGM_P str) {
@@ -58,12 +58,10 @@ void serialprint_onoff(const bool onoff) { serialprintPGM(onoff ? PSTR(MSG_ON) :
 void serialprintln_onoff(const bool onoff) { serialprint_onoff(onoff); SERIAL_EOL(); }
 void serialprint_truefalse(const bool tf) { serialprintPGM(tf ? PSTR("true") : PSTR("false")); }
 
-void print_bin(const uint16_t val) {
-  uint16_t mask = 0x8000;
+void print_bin(uint16_t val) {
   for (uint8_t i = 16; i--;) {
-    if (i && !(i % 4)) SERIAL_CHAR(' ');
-    SERIAL_CHAR((val & mask) ? '1' : '0');
-    mask >>= 1;
+    SERIAL_CHAR('0' + TEST(val, i));
+    if (!(i & 0x3) && i) SERIAL_CHAR(' ');
   }
 }
 

Marlin/src/core/serial.h

@@ -66,7 +66,6 @@ extern uint8_t marlin_debug_flags;
 #define PORT_REDIRECT(p)        _PORT_REDIRECT(1,p)
 #define PORT_RESTORE()          _PORT_RESTORE(1)
 
-#define SERIAL_CHAR(x)          SERIAL_OUT(write, x)
 #define SERIAL_ECHO(x)          SERIAL_OUT(print, x)
 #define SERIAL_ECHO_F(V...)     SERIAL_OUT(print, V)
 #define SERIAL_ECHOLN(x)        SERIAL_OUT(println, x)
@@ -75,7 +74,7 @@ extern uint8_t marlin_debug_flags;
 #define SERIAL_PRINTF(V...)     SERIAL_OUT(printf, V)
 #define SERIAL_FLUSH()          SERIAL_OUT(flush)
 
-#ifdef __STM32F1__
+#ifdef ARDUINO_ARCH_STM32
   #define SERIAL_FLUSHTX()      SERIAL_OUT(flush)
 #elif TX_BUFFER_SIZE > 0
   #define SERIAL_FLUSHTX()      SERIAL_OUT(flushTX)
@@ -83,6 +82,22 @@ extern uint8_t marlin_debug_flags;
   #define SERIAL_FLUSHTX()
 #endif
 
+// Print up to 10 chars from a list
+#define __CHAR_N(N,V...)  _CHAR_##N(V)
+#define _CHAR_N(N,V...)   __CHAR_N(N,V)
+#define _CHAR_1(c)        SERIAL_OUT(write, c)
+#define _CHAR_2(a,b)      do{ _CHAR_1(a); _CHAR_1(b); }while(0)
+#define _CHAR_3(a,V...)   do{ _CHAR_1(a); _CHAR_2(V); }while(0)
+#define _CHAR_4(a,V...)   do{ _CHAR_1(a); _CHAR_3(V); }while(0)
+#define _CHAR_5(a,V...)   do{ _CHAR_1(a); _CHAR_4(V); }while(0)
+#define _CHAR_6(a,V...)   do{ _CHAR_1(a); _CHAR_5(V); }while(0)
+#define _CHAR_7(a,V...)   do{ _CHAR_1(a); _CHAR_6(V); }while(0)
+#define _CHAR_8(a,V...)   do{ _CHAR_1(a); _CHAR_7(V); }while(0)
+#define _CHAR_9(a,V...)   do{ _CHAR_1(a); _CHAR_8(V); }while(0)
+#define _CHAR_10(a,V...)  do{ _CHAR_1(a); _CHAR_9(V); }while(0)
+
+#define SERIAL_CHAR(V...) _CHAR_N(NUM_ARGS(V),V)
+
 // Print up to 12 pairs of values. Odd elements auto-wrapped in PSTR().
 #define __SEP_N(N,V...)   _SEP_##N(V)
 #define _SEP_N(N,V...)    __SEP_N(N,V)