Version 2.0.5.3

- Fix timeout and debugging string
- Fix check for whether `LCD_TIMEOUT_TO_STATUS` is valid
- Fix incorrect debugging message
- Make capitalization of callbacks consistent.
- Allow Touch UI to use hardware SPI on Einsy boards
- Move print stats to About Printer page.
- More generic about screen with GPL license.
- Add missing handler for power loss event
- Less code duplication on status screen and main/advanced menu; more legible
- Reorganize advanced and main menu to add more features
- Hide home Z button when using Z_SAFE_HOMING
- Fix compilation errors when certain features enabled
- Fix missing labels in UI
- Improve color scheme
- Add new preheat menus
- Fix incorrect rendering of Marlin logo on boot
- Add Level X Axis and Auto calibrate buttons

Marlin/Configuration.h

@@ -99,6 +99,7 @@
 /**
  * Select the serial port on the board to use for communication with the host.
  * This allows the connection of wireless adapters (for instance) to non-default port pins.
+ * Serial port -1 is the USB emulated serial port, if available.
  * Note: The first serial port (-1 or 0) will always be used by the Arduino bootloader.
  *
  * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
@@ -107,9 +108,6 @@
 
 /**
  * Select a secondary serial port on the board to use for communication with the host.
- * This allows the connection of wireless adapters (for instance) to non-default port pins.
- * Serial port -1 is the USB emulated serial port, if available.
- *
  * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
 //#define SERIAL_PORT_2 -1
@@ -363,6 +361,7 @@
  *   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)
+ *   202 : 200k thermistor - Copymaster 3D
  *     3 : Mendel-parts thermistor (4.7k pullup)
  *     4 : 10k thermistor !! do not use it for a hotend. It gives bad resolution at high temp. !!
  *     5 : 100K thermistor - ATC Semitec 104GT-2/104NT-4-R025H42G (Used in ParCan & J-Head) (4.7k pullup)
@@ -474,7 +473,7 @@
 #if ENABLED(PIDTEMP)
   //#define PID_EDIT_MENU         // Add PID editing to the "Advanced Settings" menu. (~700 bytes of PROGMEM)
   //#define PID_AUTOTUNE_MENU     // Add PID auto-tuning to the "Advanced Settings" menu. (~250 bytes of PROGMEM)
-  //#define PID_DEBUG             // Sends debug data to the serial port.
+  //#define PID_DEBUG             // Sends debug data to the serial port. Use 'M303 D' to toggle activation.
   //#define PID_OPENLOOP 1        // Puts PID in open loop. M104/M140 sets the output power from 0 to PID_MAX
   //#define SLOW_PWM_HEATERS      // PWM with very low frequency (roughly 0.125Hz=8s) and minimum state time of approximately 1s useful for heaters driven by a relay
   //#define PID_PARAMS_PER_HOTEND // Uses separate PID parameters for each extruder (useful for mismatched extruders)
@@ -1446,6 +1445,7 @@
 //#define EEPROM_SETTINGS     // Persistent storage with M500 and M501
 //#define DISABLE_M503        // Saves ~2700 bytes of PROGMEM. Disable for release!
 #define EEPROM_CHITCHAT       // Give feedback on EEPROM commands. Disable to save PROGMEM.
+#define EEPROM_BOOT_SILENT    // Keep M503 quiet and only give errors during first load
 #if ENABLED(EEPROM_SETTINGS)
   //#define EEPROM_AUTO_INIT  // Init EEPROM automatically on any errors.
 #endif

Marlin/Configuration_adv.h

@@ -338,15 +338,22 @@
  * Controller Fan
  * To cool down the stepper drivers and MOSFETs.
  *
- * The fan will turn on automatically whenever any stepper is enabled
- * and turn off after a set period after all steppers are turned off.
+ * The fan turns on automatically whenever any driver is enabled and turns
+ * off (or reduces to idle speed) shortly after drivers are turned off.
+ *
  */
 //#define USE_CONTROLLER_FAN
 #if ENABLED(USE_CONTROLLER_FAN)
-  //#define CONTROLLER_FAN_PIN -1           // Set a custom pin for the controller fan
-  #define CONTROLLERFAN_SECS 60             // Duration in seconds for the fan to run after all motors are disabled
-  #define CONTROLLERFAN_SPEED 255           // 255 == full speed
-  //#define CONTROLLERFAN_SPEED_Z_ONLY 127  // Reduce noise on machines that keep Z enabled
+  //#define CONTROLLER_FAN_PIN -1        // Set a custom pin for the controller fan
+  //#define CONTROLLER_FAN_USE_Z_ONLY    // With this option only the Z axis is considered
+  #define CONTROLLERFAN_SPEED_MIN      0 // (0-255) Minimum speed. (If set below this value the fan is turned off.)
+  #define CONTROLLERFAN_SPEED_ACTIVE 255 // (0-255) Active speed, used when any motor is enabled
+  #define CONTROLLERFAN_SPEED_IDLE     0 // (0-255) Idle speed, used when motors are disabled
+  #define CONTROLLERFAN_IDLE_TIME     60 // (seconds) Extra time to keep the fan running after disabling motors
+  //#define CONTROLLER_FAN_EDITABLE      // Enable M710 configurable settings
+  #if ENABLED(CONTROLLER_FAN_EDITABLE)
+    #define CONTROLLER_FAN_MENU          // Enable the Controller Fan submenu
+  #endif
 #endif
 
 // When first starting the main fan, run it at full speed for the
@@ -753,8 +760,12 @@
 // Minimum time that a segment needs to take if the buffer is emptied
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
-// If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info
@@ -999,7 +1010,7 @@
   #define BOOTSCREEN_TIMEOUT 4000        // (ms) Total Duration to display the boot screen(s)
 #endif
 
-#if HAS_GRAPHICAL_LCD && HAS_PRINT_PROGRESS
+#if HAS_GRAPHICAL_LCD && EITHER(SDSUPPORT, LCD_SET_PROGRESS_MANUALLY)
   //#define PRINT_PROGRESS_SHOW_DECIMALS // Show progress with decimal digits
   //#define SHOW_REMAINING_TIME          // Display estimated time to completion
   #if ENABLED(SHOW_REMAINING_TIME)
@@ -1008,7 +1019,7 @@
   #endif
 #endif
 
-#if HAS_CHARACTER_LCD && HAS_PRINT_PROGRESS
+#if HAS_CHARACTER_LCD && EITHER(SDSUPPORT, LCD_SET_PROGRESS_MANUALLY)
   //#define LCD_PROGRESS_BAR              // Show a progress bar on HD44780 LCDs for SD printing
   #if ENABLED(LCD_PROGRESS_BAR)
     #define PROGRESS_BAR_BAR_TIME 2000    // (ms) Amount of time to show the bar
@@ -1038,6 +1049,10 @@
 
   #define EVENT_GCODE_SD_STOP "G28XY"       // G-code to run on Stop Print (e.g., "G28XY" or "G27")
 
+  #if ENABLED(PRINTER_EVENT_LEDS)
+    #define PE_LEDS_COMPLETED_TIME  (30*60) // (seconds) Time to keep the LED "done" color before restoring normal illumination
+  #endif
+
   /**
    * Continue after Power-Loss (Creality3D)
    *

Marlin/Makefile

@@ -267,6 +267,8 @@ else ifeq ($(HARDWARE_MOTHERBOARD),1147)
 else ifeq ($(HARDWARE_MOTHERBOARD),1148)
 # MKS GEN L V2
 else ifeq ($(HARDWARE_MOTHERBOARD),1149)
+# Copymaster 3D
+else ifeq ($(HARDWARE_MOTHERBOARD),1150)
 
 #
 # RAMBo and derivatives

Marlin/Version.h

@@ -28,7 +28,7 @@
 /**
  * Marlin release version identifier
  */
-//#define SHORT_BUILD_VERSION "2.0.5"
+//#define SHORT_BUILD_VERSION "2.0.5.3"
 
 /**
  * Verbose version identifier which should contain a reference to the location

Marlin/src/HAL/AVR/eeprom.cpp

@@ -25,7 +25,7 @@
 
 #if EITHER(EEPROM_SETTINGS, SD_FIRMWARE_UPDATE)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 bool PersistentStore::access_start() { return true; }
 bool PersistentStore::access_finish() { return true; }

Marlin/src/HAL/AVR/fastio.h

@@ -98,9 +98,9 @@
 
 #define SET_INPUT(IO)         _SET_INPUT(IO)
 #define SET_INPUT_PULLUP(IO)  do{ _SET_INPUT(IO); _WRITE(IO, HIGH); }while(0)
+#define SET_INPUT_PULLDOWN    SET_INPUT
 #define SET_OUTPUT(IO)        _SET_OUTPUT(IO)
-
-#define SET_PWM(IO)           SET_OUTPUT(IO)
+#define SET_PWM               SET_OUTPUT
 
 #define IS_INPUT(IO)          _IS_INPUT(IO)
 #define IS_OUTPUT(IO)         _IS_OUTPUT(IO)

Marlin/src/HAL/DUE/EepromEmulation.cpp

@@ -57,7 +57,7 @@
 #if ENABLED(FLASH_EEPROM_EMULATION)
 
 #include "../shared/Marduino.h"
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 #define EEPROMSize     4096
 #define PagesPerGroup   128

Marlin/src/HAL/DUE/HAL.h

@@ -39,7 +39,7 @@
 #include <stdint.h>
 
 // Define MYSERIAL0/1 before MarlinSerial includes!
-#if SERIAL_PORT == -1
+#if SERIAL_PORT == -1 || ENABLED(EMERGENCY_PARSER)
   #define MYSERIAL0 customizedSerial1
 #elif SERIAL_PORT == 0
   #define MYSERIAL0 Serial
@@ -56,7 +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."
-  #elif SERIAL_PORT_2 == -1
+  #elif SERIAL_PORT_2 == -1 || ENABLED(EMERGENCY_PARSER)
     #define MYSERIAL1 customizedSerial2
   #elif SERIAL_PORT_2 == 0
     #define MYSERIAL1 Serial
@@ -94,7 +94,6 @@
   #endif
 #endif
 
-
 #include "MarlinSerial.h"
 #include "MarlinSerialUSB.h"
 

Marlin/src/HAL/DUE/MarlinSerial.cpp

@@ -629,23 +629,13 @@ void MarlinSerial<Cfg>::printFloat(double number, uint8_t digits) {
 
 // If not using the USB port as serial port
 #if SERIAL_PORT >= 0
-
-  // Preinstantiate
-  template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>;
-
-  // Instantiate
-  MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
-
+  template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT>>;      // Define
+  MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;   // Instantiate
 #endif
 
-#ifdef SERIAL_PORT_2
-
-  // Preinstantiate
-  template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>;
-
-  // Instantiate
-  MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2;
-
+#if defined(SERIAL_PORT_2) && SERIAL_PORT_2 >= 0
+  template class MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>>;    // Define
+  MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2; // Instantiate
 #endif
 
 #endif // ARDUINO_ARCH_SAM

Marlin/src/HAL/DUE/MarlinSerial.h

@@ -172,13 +172,9 @@ struct MarlinSerialCfg {
 };
 
 #if SERIAL_PORT >= 0
-
   extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT>> customizedSerial1;
-
-#endif // SERIAL_PORT >= 0
-
-#ifdef SERIAL_PORT_2
-
-  extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2;
-
+#endif
+
+#if defined(SERIAL_PORT_2) && SERIAL_PORT_2 >= 0
+  extern MarlinSerial<MarlinSerialCfg<SERIAL_PORT_2>> customizedSerial2;
 #endif

Marlin/src/HAL/DUE/MarlinSerialUSB.cpp

@@ -29,7 +29,7 @@
 
 #include "../../inc/MarlinConfig.h"
 
-#if SERIAL_PORT == -1
+#if HAS_USB_SERIAL
 
 #include "MarlinSerialUSB.h"
 
@@ -283,8 +283,12 @@ void MarlinSerialUSB::printFloat(double number, uint8_t digits) {
 }
 
 // Preinstantiate
-MarlinSerialUSB customizedSerial1;
-
-#endif // SERIAL_PORT == -1
+#if SERIAL_PORT == -1
+  MarlinSerialUSB customizedSerial1;
+#endif
+#if SERIAL_PORT_2 == -1
+  MarlinSerialUSB customizedSerial2;
+#endif
 
+#endif // HAS_USB_SERIAL
 #endif // ARDUINO_ARCH_SAM

Marlin/src/HAL/DUE/MarlinSerialUSB.h

@@ -28,7 +28,7 @@
 
 #include "../../inc/MarlinConfig.h"
 
-#if SERIAL_PORT == -1
+#if HAS_USB_SERIAL
 
 #include <WString.h>
 
@@ -88,6 +88,12 @@ private:
   static void printFloat(double, uint8_t);
 };
 
-extern MarlinSerialUSB customizedSerial1;
+#if SERIAL_PORT == -1
+  extern MarlinSerialUSB customizedSerial1;
+#endif
 
-#endif // SERIAL_PORT == -1
+#if SERIAL_PORT_2 == -1
+  extern MarlinSerialUSB customizedSerial2;
+#endif
+
+#endif // HAS_USB_SERIAL

Marlin/src/HAL/DUE/eeprom.cpp

@@ -27,7 +27,7 @@
 #if ENABLED(EEPROM_SETTINGS)
 
 #include "../../inc/MarlinConfig.h"
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 #if !defined(E2END) && ENABLED(FLASH_EEPROM_EMULATION)
   #define E2END 0xFFF // Default to Flash emulated EEPROM size (EepromEmulation_Due.cpp)

Marlin/src/HAL/DUE/fastio.h

@@ -166,7 +166,7 @@
 // Set pin as output (wrapper) -  reads the pin and sets the output to that value
 #define SET_OUTPUT(IO)       _SET_OUTPUT(IO)
 // Set pin as PWM
-#define SET_PWM(IO)           SET_OUTPUT(IO)
+#define SET_PWM               SET_OUTPUT
 
 // Check if pin is an input
 #define IS_INPUT(IO)         ((digitalPinToPort(IO)->PIO_OSR & digitalPinToBitMask(IO)) == 0)

Marlin/src/HAL/DUE/fastio/G2_PWM.cpp

@@ -46,6 +46,31 @@
 
 #include "G2_PWM.h"
 
+#if PIN_EXISTS(MOTOR_CURRENT_PWM_X)
+  #define G2_PWM_X 1
+#else
+  #define G2_PWM_X 0
+#endif
+#if PIN_EXISTS(MOTOR_CURRENT_PWM_Y)
+  #define G2_PWM_Y 1
+#else
+  #define G2_PWM_Y 0
+#endif
+#if PIN_EXISTS(MOTOR_CURRENT_PWM_Z)
+  #define G2_PWM_Z 1
+#else
+  #define G2_PWM_Z 0
+#endif
+#if PIN_EXISTS(MOTOR_CURRENT_PWM_E)
+  #define G2_PWM_E 1
+#else
+  #define G2_PWM_E 0
+#endif
+#define G2_MASK_X(V) (G2_PWM_X * (V))
+#define G2_MASK_Y(V) (G2_PWM_Y * (V))
+#define G2_MASK_Z(V) (G2_PWM_Z * (V))
+#define G2_MASK_E(V) (G2_PWM_E * (V))
+
 volatile uint32_t *SODR_A = &PIOA->PIO_SODR,
                   *SODR_B = &PIOB->PIO_SODR,
                   *CODR_A = &PIOA->PIO_CODR,
@@ -55,10 +80,18 @@ PWM_map ISR_table[NUM_PWMS] = PWM_MAP_INIT;
 
 void Stepper::digipot_init() {
 
-  OUT_WRITE(MOTOR_CURRENT_PWM_X_PIN, 0);  // init pins
-  OUT_WRITE(MOTOR_CURRENT_PWM_Y_PIN, 0);
-  OUT_WRITE(MOTOR_CURRENT_PWM_Z_PIN, 0);
-  OUT_WRITE(MOTOR_CURRENT_PWM_E_PIN, 0);
+  #if PIN_EXISTS(MOTOR_CURRENT_PWM_X)
+    OUT_WRITE(MOTOR_CURRENT_PWM_X_PIN, 0);  // init pins
+  #endif
+  #if PIN_EXISTS(MOTOR_CURRENT_PWM_Y)
+    OUT_WRITE(MOTOR_CURRENT_PWM_Y_PIN, 0);
+  #endif
+  #if G2_PWM_Z
+    OUT_WRITE(MOTOR_CURRENT_PWM_Z_PIN, 0);
+  #endif
+  #if G2_PWM_E
+    OUT_WRITE(MOTOR_CURRENT_PWM_E_PIN, 0);
+  #endif
 
   #define WPKEY          (0x50574D << 8) // “PWM” in ASCII
   #define WPCMD_DIS_SW   0  // command to disable Write Protect SW
@@ -71,30 +104,51 @@ void Stepper::digipot_init() {
   PWM->PWM_WPCR = WPKEY | WPRG_ALL | WPCMD_DIS_SW;        // enable setting of all PWM registers
   PWM->PWM_CLK = PWM_CLOCK_F;                             // enable CLK_A and set it to 1MHz, leave CLK_B disabled
   PWM->PWM_CH_NUM[0].PWM_CMR = 0b1011;                    // set channel 0 to Clock A input & to left aligned
-  PWM->PWM_CH_NUM[1].PWM_CMR = 0b1011;                    // set channel 1 to Clock A input & to left aligned
-  PWM->PWM_CH_NUM[2].PWM_CMR = 0b1011;                    // set channel 2 to Clock A input & to left aligned
-  PWM->PWM_CH_NUM[3].PWM_CMR = 0b1011;                    // set channel 3 to Clock A input & to left aligned
-  PWM->PWM_CH_NUM[4].PWM_CMR = 0b1011;                    // set channel 4 to Clock A input & to left aligned
+  if (G2_PWM_X) PWM->PWM_CH_NUM[1].PWM_CMR = 0b1011;      // set channel 1 to Clock A input & to left aligned
+  if (G2_PWM_Y) PWM->PWM_CH_NUM[2].PWM_CMR = 0b1011;      // set channel 2 to Clock A input & to left aligned
+  if (G2_PWM_Z) PWM->PWM_CH_NUM[3].PWM_CMR = 0b1011;      // set channel 3 to Clock A input & to left aligned
+  if (G2_PWM_E) PWM->PWM_CH_NUM[4].PWM_CMR = 0b1011;      // set channel 4 to Clock A input & to left aligned
 
   PWM->PWM_CH_NUM[0].PWM_CPRD = PWM_PERIOD_US;            // set channel 0 Period
 
   PWM->PWM_IER2 = PWM_IER1_CHID0;                         // generate interrupt when counter0 overflows
-  PWM->PWM_IER2 = PWM_IER2_CMPM0 | PWM_IER2_CMPM1 | PWM_IER2_CMPM2 | PWM_IER2_CMPM3 | PWM_IER2_CMPM4;        // generate interrupt on compare event
+  PWM->PWM_IER2 = PWM_IER2_CMPM0
+    | G2_MASK_X(PWM_IER2_CMPM1)
+    | G2_MASK_Y(PWM_IER2_CMPM2)
+    | G2_MASK_Z(PWM_IER2_CMPM3)
+    | G2_MASK_E(PWM_IER2_CMPM4)
+  ; // generate interrupt on compare event
 
-  PWM->PWM_CMP[1].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[0]));   // interrupt when counter0 == CMPV - used to set Motor 1 PWM inactive
-  PWM->PWM_CMP[2].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[0]));   // interrupt when counter0 == CMPV - used to set Motor 2 PWM inactive
-  PWM->PWM_CMP[3].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[1]));   // interrupt when counter0 == CMPV - used to set Motor 3 PWM inactive
-  PWM->PWM_CMP[4].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[2]));   // interrupt when counter0 == CMPV - used to set Motor 4 PWM inactive
+  if (G2_PWM_X) PWM->PWM_CMP[1].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[0])); // interrupt when counter0 == CMPV - used to set Motor 1 PWM inactive
+  if (G2_PWM_Y) PWM->PWM_CMP[2].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[0])); // interrupt when counter0 == CMPV - used to set Motor 2 PWM inactive
+  if (G2_PWM_Z) PWM->PWM_CMP[3].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[1])); // interrupt when counter0 == CMPV - used to set Motor 3 PWM inactive
+  if (G2_PWM_E) PWM->PWM_CMP[4].PWM_CMPV = 0x010000000LL | G2_VREF_COUNT(G2_VREF(motor_current_setting[2])); // interrupt when counter0 == CMPV - used to set Motor 4 PWM inactive
 
-  PWM->PWM_CMP[1].PWM_CMPM = 0x0001;  // enable compare event
-  PWM->PWM_CMP[2].PWM_CMPM = 0x0001;  // enable compare event
-  PWM->PWM_CMP[3].PWM_CMPM = 0x0001;  // enable compare event
-  PWM->PWM_CMP[4].PWM_CMPM = 0x0001;  // enable compare event
+  if (G2_PWM_X) PWM->PWM_CMP[1].PWM_CMPM = 0x0001;  // enable compare event
+  if (G2_PWM_Y) PWM->PWM_CMP[2].PWM_CMPM = 0x0001;  // enable compare event
+  if (G2_PWM_Z) PWM->PWM_CMP[3].PWM_CMPM = 0x0001;  // enable compare event
+  if (G2_PWM_E) PWM->PWM_CMP[4].PWM_CMPM = 0x0001;  // enable compare event
 
-  PWM->PWM_SCM = PWM_SCM_UPDM_MODE0 | PWM_SCM_SYNC0 | PWM_SCM_SYNC1 | PWM_SCM_SYNC2 | PWM_SCM_SYNC3 | PWM_SCM_SYNC4; // sync 1-4 with 0, use mode 0 for updates
+  PWM->PWM_SCM = PWM_SCM_UPDM_MODE0 | PWM_SCM_SYNC0
+    | G2_MASK_X(PWM_SCM_SYNC1)
+    | G2_MASK_Y(PWM_SCM_SYNC2)
+    | G2_MASK_Z(PWM_SCM_SYNC3)
+    | G2_MASK_E(PWM_SCM_SYNC4)
+  ; // sync 1-4 with 0, use mode 0 for updates
 
-  PWM->PWM_ENA = PWM_ENA_CHID0 | PWM_ENA_CHID1 | PWM_ENA_CHID2 | PWM_ENA_CHID3 | PWM_ENA_CHID4;         // enable the channels used by G2
-  PWM->PWM_IER1 = PWM_IER1_CHID0 | PWM_IER1_CHID1 | PWM_IER1_CHID2 | PWM_IER1_CHID3 | PWM_IER1_CHID4;        // enable interrupts for the channels used by G2
+  PWM->PWM_ENA = PWM_ENA_CHID0
+    | G2_MASK_X(PWM_ENA_CHID1)
+    | G2_MASK_Y(PWM_ENA_CHID2)
+    | G2_MASK_Z(PWM_ENA_CHID3)
+    | G2_MASK_E(PWM_ENA_CHID4)
+  ; // enable channels used by G2
+
+  PWM->PWM_IER1 = PWM_IER1_CHID0
+    | G2_MASK_X(PWM_IER1_CHID1)
+    | G2_MASK_Y(PWM_IER1_CHID2)
+    | G2_MASK_Z(PWM_IER1_CHID3)
+    | G2_MASK_E(PWM_IER1_CHID4)
+  ; // enable interrupts for channels used by G2
 
   NVIC_EnableIRQ(PWM_IRQn);     // Enable interrupt handler
   NVIC_SetPriority(PWM_IRQn, NVIC_EncodePriority(0, 10, 0));  // normal priority for PWM module (can stand some jitter on the Vref signals)
@@ -105,20 +159,27 @@ void Stepper::digipot_current(const uint8_t driver, const int16_t current) {
   if (!(PWM->PWM_CH_NUM[0].PWM_CPRD == PWM_PERIOD_US)) digipot_init();  // Init PWM system if needed
 
   switch (driver) {
-    case 0: PWM->PWM_CMP[1].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update X & Y
-            PWM->PWM_CMP[2].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));
-            PWM->PWM_CMP[1].PWM_CMPMUPD = 0x0001;  // enable compare event
-            PWM->PWM_CMP[2].PWM_CMPMUPD = 0x0001;  // enable compare event
-            PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
-            break;
-    case 1: PWM->PWM_CMP[3].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update Z
-            PWM->PWM_CMP[3].PWM_CMPMUPD = 0x0001;  // enable compare event
-            PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
-            break;
-    default:PWM->PWM_CMP[4].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update E
-            PWM->PWM_CMP[4].PWM_CMPMUPD = 0x0001;  // enable compare event
-            PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
-            break;
+    case 0:
+      if (G2_PWM_X) PWM->PWM_CMP[1].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update X & Y
+      if (G2_PWM_Y) PWM->PWM_CMP[2].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));
+      if (G2_PWM_X) PWM->PWM_CMP[1].PWM_CMPMUPD = 0x0001;  // enable compare event
+      if (G2_PWM_Y) PWM->PWM_CMP[2].PWM_CMPMUPD = 0x0001;  // enable compare event
+      if (G2_PWM_X || G2_PWM_Y) PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
+      break;
+    case 1:
+      if (G2_PWM_Z) {
+        PWM->PWM_CMP[3].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update Z
+        PWM->PWM_CMP[3].PWM_CMPMUPD = 0x0001;  // enable compare event
+        PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
+      }
+      break;
+    default:
+      if (G2_PWM_E) {
+        PWM->PWM_CMP[4].PWM_CMPVUPD = 0x010000000LL | G2_VREF_COUNT(G2_VREF(current));    // update E
+        PWM->PWM_CMP[4].PWM_CMPMUPD = 0x0001;  // enable compare event
+        PWM->PWM_SCUC = PWM_SCUC_UPDULOCK; // tell the PWM controller to update the values on the next cycle
+      }
+      break;
   }
 }
 
@@ -127,17 +188,17 @@ volatile uint32_t PWM_ISR1_STATUS, PWM_ISR2_STATUS;
 void PWM_Handler() {
   PWM_ISR1_STATUS = PWM->PWM_ISR1;
   PWM_ISR2_STATUS = PWM->PWM_ISR2;
-  if (PWM_ISR1_STATUS & PWM_IER1_CHID0) {                           // CHAN_0 interrupt
-    *ISR_table[0].set_register = ISR_table[0].write_mask;                                          // set X to active
-    *ISR_table[1].set_register = ISR_table[1].write_mask;                                          // set Y to active
-    *ISR_table[2].set_register = ISR_table[2].write_mask;                                          // set Z to active
-    *ISR_table[3].set_register = ISR_table[3].write_mask;                                          // set E to active
+  if (PWM_ISR1_STATUS & PWM_IER1_CHID0) {                                                         // CHAN_0 interrupt
+    if (G2_PWM_X) *ISR_table[0].set_register = ISR_table[0].write_mask;                           // set X to active
+    if (G2_PWM_Y) *ISR_table[1].set_register = ISR_table[1].write_mask;                           // set Y to active
+    if (G2_PWM_Z) *ISR_table[2].set_register = ISR_table[2].write_mask;                           // set Z to active
+    if (G2_PWM_E) *ISR_table[3].set_register = ISR_table[3].write_mask;                           // set E to active
   }
   else {
-    if (PWM_ISR2_STATUS & PWM_IER2_CMPM1)  *ISR_table[0].clr_register = ISR_table[0].write_mask;   // set X to inactive
-    if (PWM_ISR2_STATUS & PWM_IER2_CMPM2)  *ISR_table[1].clr_register = ISR_table[1].write_mask;   // set Y to inactive
-    if (PWM_ISR2_STATUS & PWM_IER2_CMPM3)  *ISR_table[2].clr_register = ISR_table[2].write_mask;   // set Z to inactive
-    if (PWM_ISR2_STATUS & PWM_IER2_CMPM4)  *ISR_table[3].clr_register = ISR_table[3].write_mask;   // set E to inactive
+    if (G2_PWM_X && (PWM_ISR2_STATUS & PWM_IER2_CMPM1)) *ISR_table[0].clr_register = ISR_table[0].write_mask; // set X to inactive
+    if (G2_PWM_Y && (PWM_ISR2_STATUS & PWM_IER2_CMPM2)) *ISR_table[1].clr_register = ISR_table[1].write_mask; // set Y to inactive
+    if (G2_PWM_Z && (PWM_ISR2_STATUS & PWM_IER2_CMPM3)) *ISR_table[2].clr_register = ISR_table[2].write_mask; // set Z to inactive
+    if (G2_PWM_E && (PWM_ISR2_STATUS & PWM_IER2_CMPM4)) *ISR_table[3].clr_register = ISR_table[3].write_mask; // set E to inactive
   }
   return;
 }

Marlin/src/HAL/DUE/inc/Conditionals_post.h

@@ -21,8 +21,8 @@
  */
 #pragma once
 
-#if USE_EMULATED_EEPROM
+#if USE_FALLBACK_EEPROM
   #undef SRAM_EEPROM_EMULATION
   #undef SDCARD_EEPROM_EMULATION
-  #define FLASH_EEPROM_EMULATION 1
+  #define FLASH_EEPROM_EMULATION
 #endif

Marlin/src/HAL/ESP32/eeprom_impl.cpp

@@ -26,7 +26,7 @@
 
 #if ENABLED(EEPROM_SETTINGS) && DISABLED(FLASH_EEPROM_EMULATION)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 #include "EEPROM.h"
 
 #define EEPROM_SIZE 4096

Marlin/src/HAL/ESP32/fastio.h

@@ -56,7 +56,7 @@
 #define SET_OUTPUT(IO)          do{ _SET_OUTPUT(IO); }while(0)
 
 // Set pin as PWM
-#define SET_PWM(IO)             SET_OUTPUT(IO)
+#define SET_PWM                 SET_OUTPUT
 
 // Set pin as output and init
 #define OUT_WRITE(IO,V)         do{ _SET_OUTPUT(IO); WRITE(IO,V); }while(0)

Marlin/src/HAL/ESP32/inc/Conditionals_post.h

@@ -20,3 +20,8 @@
  *
  */
 #pragma once
+
+// If no real EEPROM, Flash emulation, or SRAM emulation is available fall back to SD emulation
+#if ENABLED(EEPROM_SETTINGS) && NONE(USE_WIRED_EEPROM, FLASH_EEPROM_EMULATION, SRAM_EEPROM_EMULATION)
+  #define SDCARD_EEPROM_EMULATION
+#endif

Marlin/src/HAL/LINUX/eeprom_impl.cpp

@@ -26,7 +26,7 @@
 
 #if ENABLED(EEPROM_SETTINGS)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 #include <stdio.h>
 
 #define LINUX_EEPROM_SIZE (E2END + 1)

Marlin/src/HAL/LPC1768/HAL.cpp

@@ -67,9 +67,7 @@ int16_t PARSED_PIN_INDEX(const char code, const int16_t dval) {
   return ind > -1 ? ind : dval;
 }
 
-void flashFirmware(int16_t value) {
-  NVIC_SystemReset();
-}
+void flashFirmware(const int16_t) { NVIC_SystemReset(); }
 
 void HAL_clear_reset_source(void) {
   #if ENABLED(USE_WATCHDOG)

Marlin/src/HAL/LPC1768/HAL.h

@@ -195,7 +195,7 @@ int16_t PARSED_PIN_INDEX(const char code, const int16_t dval);
 void HAL_idletask();
 
 #define PLATFORM_M997_SUPPORT
-void flashFirmware(int16_t value);
+void flashFirmware(const int16_t);
 
 /**
  * set_pwm_frequency

Marlin/src/HAL/LPC1768/eeprom_api.h

@@ -21,6 +21,6 @@
  */
 #pragma once
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 #define FLASH_EEPROM_EMULATION

Marlin/src/HAL/LPC1768/eeprom_flash.cpp

@@ -36,12 +36,11 @@
  * 16Kb I/O buffers (intended to hold DMA USB and Ethernet data, but currently
  * unused).
  */
-#include "../../inc/MarlinConfigPre.h"
+#include "../../inc/MarlinConfig.h"
 
 #if ENABLED(FLASH_EEPROM_EMULATION)
 
-#include "persistent_store_api.h"
-#include "../../inc/MarlinConfig.h"
+#include "eeprom_api.h"
 
 extern "C" {
   #include <lpc17xx_iap.h>

Marlin/src/HAL/LPC1768/eeprom_sdcard.cpp

@@ -26,7 +26,7 @@
 
 #if ENABLED(SDCARD_EEPROM_EMULATION)
 
-#include "persistent_store_api.h"
+#include "eeprom_api.h"
 
 #include <chanfs/diskio.h>
 #include <chanfs/ff.h>

Marlin/src/HAL/LPC1768/fastio.h

@@ -104,7 +104,7 @@
 /// set pin as output wrapper  -  reads the pin and sets the output to that value
 #define SET_OUTPUT(IO)        do{ _WRITE(IO, _READ(IO)); _SET_OUTPUT(IO); }while(0)
 // set pin as PWM
-#define SET_PWM(IO)           SET_OUTPUT(IO)
+#define SET_PWM               SET_OUTPUT
 
 /// check if pin is an input wrapper
 #define IS_INPUT(IO)          _IS_INPUT(IO)

Marlin/src/HAL/LPC1768/inc/Conditionals_post.h

@@ -21,10 +21,6 @@
  */
 #pragma once
 
-#if ENABLED(EEPROM_SETTINGS)
-  #undef USE_REAL_EEPROM
-  #define USE_EMULATED_EEPROM 1
-  #if DISABLED(FLASH_EEPROM_EMULATION)
-    #define SDCARD_EEPROM_EMULATION 1
-  #endif
+#if USE_FALLBACK_EEPROM && NONE(SDCARD_EEPROM_EMULATION, SRAM_EEPROM_EMULATION)
+  #define FLASH_EEPROM_EMULATION
 #endif

Marlin/src/HAL/LPC1768/main.cpp

@@ -90,7 +90,7 @@ void HAL_init() {
 
   //debug_frmwrk_init();
   //_DBG("\n\nDebug running\n");
-  // Initialise the SD card chip select pins as soon as possible
+  // Initialize the SD card chip select pins as soon as possible
   #if PIN_EXISTS(SS)
     OUT_WRITE(SS_PIN, HIGH);
   #endif

Marlin/src/HAL/SAMD51/QSPIFlash.cpp

@@ -0,0 +1,78 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(QSPI_EEPROM)
+
+#include "QSPIFlash.h"
+
+#define INVALID_ADDR    0xffffffff
+#define SECTOR_OF(a)    (a & ~(SFLASH_SECTOR_SIZE - 1))
+#define OFFSET_OF(a)    (a & (SFLASH_SECTOR_SIZE - 1))
+
+Adafruit_SPIFlashBase * QSPIFlash::_flashBase = nullptr;
+uint8_t QSPIFlash::_buf[SFLASH_SECTOR_SIZE];
+uint32_t QSPIFlash::_addr = INVALID_ADDR;
+
+void QSPIFlash::begin() {
+  if (_flashBase != nullptr) return;
+
+  _flashBase = new Adafruit_SPIFlashBase(new Adafruit_FlashTransport_QSPI());
+  _flashBase->begin(NULL);
+}
+
+size_t QSPIFlash::size() {
+  return _flashBase->size();
+}
+
+uint8_t QSPIFlash::readByte(const uint32_t address) {
+  if (SECTOR_OF(address) == _addr) return _buf[OFFSET_OF(address)];
+
+  return _flashBase->read8(address);
+}
+
+void QSPIFlash::writeByte(const uint32_t address, const uint8_t value) {
+  uint32_t const sector_addr = SECTOR_OF(address);
+
+  // Page changes, flush old and update new cache
+  if (sector_addr != _addr) {
+    flush();
+    _addr = sector_addr;
+
+    // read a whole page from flash
+    _flashBase->readBuffer(sector_addr, _buf, SFLASH_SECTOR_SIZE);
+  }
+
+  _buf[OFFSET_OF(address)] = value;
+}
+
+void QSPIFlash::flush() {
+  if (_addr == INVALID_ADDR) return;
+
+  _flashBase->eraseSector(_addr / SFLASH_SECTOR_SIZE);
+  _flashBase->writeBuffer(_addr, _buf, SFLASH_SECTOR_SIZE);
+
+  _addr = INVALID_ADDR;
+}
+
+#endif // QSPI_EEPROM

Marlin/src/HAL/SAMD51/QSPIFlash.h

@@ -0,0 +1,51 @@
+/**
+ * @file QSPIFlash.h
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach and Dean Miller for Adafruit Industries LLC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * Derived from Adafruit_SPIFlash class with no SdFat references
+ *
+ */
+
+#pragma once
+
+#include "Adafruit_SPIFlashBase.h"
+
+// This class extends Adafruit_SPIFlashBase by adding caching support.
+//
+// This class will use 4096 Bytes of RAM as a block cache.
+class QSPIFlash {
+  public:
+    static void begin();
+    static size_t size();
+    static uint8_t readByte(const uint32_t address);
+    static void writeByte(const uint32_t address, const uint8_t v);
+    static void flush();
+
+  private:
+    static Adafruit_SPIFlashBase * _flashBase;
+    static uint8_t _buf[SFLASH_SECTOR_SIZE];
+    static uint32_t _addr;
+};
+
+extern QSPIFlash qspi;

Marlin/src/HAL/SAMD51/eeprom.cpp

@@ -0,0 +1,66 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef __SAMD51__
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(EEPROM_SETTINGS) && NONE(QSPI_EEPROM, FLASH_EEPROM_EMULATION)
+
+#include "../shared/eeprom_api.h"
+
+size_t PersistentStore::capacity() { return E2END + 1; }
+
+bool PersistentStore::access_start() { return true; }
+bool PersistentStore::access_finish() { return true; }
+
+bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+  while (size--) {
+    const uint8_t v = *value;
+    uint8_t * const p = (uint8_t * const)pos;
+    if (v != eeprom_read_byte(p)) {
+      eeprom_write_byte(p, v);
+      delay(2);
+      if (eeprom_read_byte(p) != v) {
+        SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
+        return true;
+      }
+    }
+    crc16(crc, &v, 1);
+    pos++;
+    value++;
+  }
+  return false;
+}
+
+bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
+  while (size--) {
+    uint8_t c = eeprom_read_byte((uint8_t*)pos);
+    if (writing) *value = c;
+    crc16(crc, &c, 1);
+    pos++;
+    value++;
+  }
+  return false;
+}
+
+#endif // EEPROM_SETTINGS && !(QSPI_EEPROM || FLASH_EEPROM_EMULATION)
+#endif // __SAMD51__

Marlin/src/HAL/SAMD51/eeprom_flash.cpp

@@ -0,0 +1,96 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifdef __SAMD51__
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(FLASH_EEPROM_EMULATION)
+
+#include "../shared/eeprom_api.h"
+
+#define NVMCTRL_CMD(c)    do{                                                 \
+                            SYNC(!NVMCTRL->STATUS.bit.READY);                 \
+                            NVMCTRL->INTFLAG.bit.DONE = true;                 \
+                            NVMCTRL->CTRLB.reg = c | NVMCTRL_CTRLB_CMDEX_KEY; \
+                            SYNC(NVMCTRL->INTFLAG.bit.DONE);                  \
+                          }while(0)
+#define NVMCTRL_FLUSH()   do{                                           \
+                            if (NVMCTRL->SEESTAT.bit.LOAD)              \
+                              NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_SEEFLUSH);  \
+                          }while(0)
+
+size_t PersistentStore::capacity() {
+  const uint8_t psz = NVMCTRL->SEESTAT.bit.PSZ,
+                sblk = NVMCTRL->SEESTAT.bit.SBLK;
+
+  return   (!psz && !sblk)         ? 0
+         : (psz <= 2)              ? (0x200 << psz)
+         : (sblk == 1 || psz == 3) ?  4096
+         : (sblk == 2 || psz == 4) ?  8192
+         : (sblk <= 4 || psz == 5) ? 16384
+         : (sblk >= 9 && psz == 7) ? 65536
+                                   : 32768;
+}
+
+bool PersistentStore::access_start() {
+  NVMCTRL->SEECFG.reg = NVMCTRL_SEECFG_WMODE_BUFFERED;  // Buffered mode and segment reallocation active
+  if (NVMCTRL->SEESTAT.bit.RLOCK)
+    NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_USEE);    // Unlock E2P data write access
+  return true;
+}
+
+bool PersistentStore::access_finish() {
+  NVMCTRL_FLUSH();
+  if (!NVMCTRL->SEESTAT.bit.LOCK)
+    NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_LSEE);    // Lock E2P data write access
+  return true;
+}
+
+bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+  while (size--) {
+    const uint8_t v = *value;
+    SYNC(NVMCTRL->SEESTAT.bit.BUSY);
+    if (NVMCTRL->INTFLAG.bit.SEESFULL)
+      NVMCTRL_FLUSH();      // Next write will trigger a sector reallocation. I need to flush 'pagebuffer'
+    ((volatile uint8_t *)SEEPROM_ADDR)[pos] = v;
+    SYNC(!NVMCTRL->INTFLAG.bit.SEEWRC);
+    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*/) {
+  while (size--) {
+    SYNC(NVMCTRL->SEESTAT.bit.BUSY);
+    uint8_t c = ((volatile uint8_t *)SEEPROM_ADDR)[pos];
+    if (writing) *value = c;
+    crc16(crc, &c, 1);
+    pos++;
+    value++;
+  }
+  return false;
+}
+
+#endif // FLASH_EEPROM_EMULATION
+#endif // __SAMD51__

Marlin/src/HAL/SAMD51/eeprom_qspi.cpp

@@ -0,0 +1,71 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#ifdef __SAMD51__
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(QSPI_EEPROM)
+
+#include "../shared/eeprom_api.h"
+
+#include "QSPIFlash.h"
+
+static bool initialized;
+
+size_t PersistentStore::capacity() { return qspi.size(); }
+
+bool PersistentStore::access_start() {
+  if (!initialized) {
+    qspi.begin();
+    initialized = true;
+  }
+  return true;
+}
+
+bool PersistentStore::access_finish() {
+  qspi.flush();
+  return true;
+}
+
+bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
+  while (size--) {
+    const uint8_t v = *value;
+    qspi.writeByte(pos, v);
+    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*/) {
+  while (size--) {
+    uint8_t c = qspi.readByte(pos);
+    if (writing) *value = c;
+    crc16(crc, &c, 1);
+    pos++;
+    value++;
+  }
+  return false;
+}
+
+#endif // QSPI_EEPROM
+#endif // __SAMD51__

Marlin/src/HAL/SAMD51/fastio.h

@@ -100,9 +100,9 @@
                                   PORT->Group[port].DIRCLR.reg = MASK(pin);                           \
                                 }while(0)
 // Set pin as PWM (push pull)
-#define SET_PWM(IO)             SET_OUTPUT(IO)
+#define SET_PWM                 SET_OUTPUT
 // Set pin as PWM (open drain)
-#define SET_PWM_OD(IO)          SET_OUTPUT_OD(IO)
+#define SET_PWM_OD              SET_OUTPUT_OD
 
 // check if pin is an output
 #define IS_OUTPUT(IO)            ((PORT->Group[(EPortType)GET_SAMD_PORT(IO)].DIR.reg & MASK(GET_SAMD_PIN(IO))) \

Marlin/src/HAL/SAMD51/inc/Conditionals_post.h

@@ -21,8 +21,6 @@
  */
 #pragma once
 
-#if USE_EMULATED_EEPROM
-  #undef SRAM_EEPROM_EMULATION
-  #undef SDCARD_EEPROM_EMULATION
-  #define FLASH_EEPROM_EMULATION 1
+#if USE_FALLBACK_EEPROM && NONE(SDCARD_EEPROM_EMULATION, SRAM_EEPROM_EMULATION)
+  #define FLASH_EEPROM_EMULATION
 #endif

Marlin/src/HAL/SAMD51/persistent_store_eeprom.cpp

@@ -1,129 +0,0 @@
-/**
- * Marlin 3D Printer Firmware
- *
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#ifdef __SAMD51__
-
-#include "../../inc/MarlinConfig.h"
-
-#if ENABLED(EEPROM_SETTINGS)
-
-#include "../shared/persistent_store_api.h"
-
-#if ENABLED(FLASH_EEPROM_EMULATION)
-  #define NVMCTRL_CMD(c)    do{                                                 \
-                              SYNC(!NVMCTRL->STATUS.bit.READY);                 \
-                              NVMCTRL->INTFLAG.bit.DONE = true;                 \
-                              NVMCTRL->CTRLB.reg = c | NVMCTRL_CTRLB_CMDEX_KEY; \
-                              SYNC(NVMCTRL->INTFLAG.bit.DONE);                  \
-                            }while(0)
-  #define NVMCTRL_FLUSH()   do{                                           \
-                              if (NVMCTRL->SEESTAT.bit.LOAD)              \
-                                NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_SEEFLUSH);  \
-                            }while(0)
-#endif
-
-bool PersistentStore::access_start() {
-  #if ENABLED(FLASH_EEPROM_EMULATION)
-    NVMCTRL->SEECFG.reg = NVMCTRL_SEECFG_WMODE_BUFFERED;  // Buffered mode and segment reallocation active
-  #endif
-
-  return true;
-}
-
-bool PersistentStore::access_finish() {
-  #if ENABLED(FLASH_EEPROM_EMULATION)
-    NVMCTRL_FLUSH();
-    if (!NVMCTRL->SEESTAT.bit.LOCK)
-      NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_LSEE);    // Lock E2P data write access
-  #endif
-
-  return true;
-}
-
-bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
-  #if ENABLED(FLASH_EEPROM_EMULATION)
-    if (NVMCTRL->SEESTAT.bit.RLOCK)
-      NVMCTRL_CMD(NVMCTRL_CTRLB_CMD_USEE);    // Unlock E2P data write access
-  #endif
-
-  while (size--) {
-    const uint8_t v = *value;
-    #if ENABLED(FLASH_EEPROM_EMULATION)
-      SYNC(NVMCTRL->SEESTAT.bit.BUSY);
-      if (NVMCTRL->INTFLAG.bit.SEESFULL)
-        NVMCTRL_FLUSH();      // Next write will trigger a sector reallocation. I need to flush 'pagebuffer'
-      ((volatile uint8_t *)SEEPROM_ADDR)[pos] = v;
-      SYNC(!NVMCTRL->INTFLAG.bit.SEEWRC);
-    #else
-      uint8_t * const p = (uint8_t * const)pos;
-      if (v != eeprom_read_byte(p)) {
-        eeprom_write_byte(p, v);
-        delay(2);
-        if (eeprom_read_byte(p) != v) {
-          SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
-          return 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*/) {
-  while (size--) {
-    uint8_t c;
-    #if ENABLED(FLASH_EEPROM_EMULATION)
-      SYNC(NVMCTRL->SEESTAT.bit.BUSY);
-      c = ((volatile uint8_t *)SEEPROM_ADDR)[pos];
-    #else
-      c = eeprom_read_byte((uint8_t*)pos);
-    #endif
-    if (writing) *value = c;
-    crc16(crc, &c, 1);
-    pos++;
-    value++;
-  }
-  return false;
-}
-
-size_t PersistentStore::capacity() {
-  #if ENABLED(FLASH_EEPROM_EMULATION)
-    const uint8_t psz = NVMCTRL->SEESTAT.bit.PSZ,
-                  sblk = NVMCTRL->SEESTAT.bit.SBLK;
-
-         if (!psz && !sblk)         return     0;
-    else if (psz <= 2)              return (0x200 << psz);
-    else if (sblk == 1 || psz == 3) return  4096;
-    else if (sblk == 2 || psz == 4) return  8192;
-    else if (sblk <= 4 || psz == 5) return 16384;
-    else if (sblk >= 9 && psz == 7) return 65536;
-    else                            return 32768;
-  #else
-    return E2END + 1;
-  #endif
-}
-
-#endif // EEPROM_SETTINGS
-
-#endif // __SAMD51__

Marlin/src/HAL/STM32/HAL.cpp

@@ -133,6 +133,6 @@ void HAL_adc_start_conversion(const uint8_t adc_pin) { HAL_adc_result = analogRe
 
 uint16_t HAL_adc_get_result() { return HAL_adc_result; }
 
-void flashFirmware(int16_t) { NVIC_SystemReset(); }
+void flashFirmware(const int16_t) { NVIC_SystemReset(); }
 
 #endif // ARDUINO_ARCH_STM32 && !STM32GENERIC

Marlin/src/HAL/STM32/HAL.h

@@ -223,4 +223,4 @@ uint16_t HAL_adc_get_result();
 #define PARSED_PIN_INDEX(code, dval) parser.intval(code, dval)
 
 #define PLATFORM_M997_SUPPORT
-void flashFirmware(int16_t value);
+void flashFirmware(const int16_t);

Marlin/src/HAL/STM32/SoftwareSerial.h

@@ -29,9 +29,7 @@
  * The latest version of this library can always be found at
  * http://arduiniana.org.
  */
-
-#ifndef SOFTWARESERIAL_H
-#define SOFTWARESERIAL_H
+#pragma once
 
 #include <Arduino.h>
 
@@ -64,7 +62,6 @@ class SoftwareSerial : public Stream {
     uint32_t delta_start = 0;
 
     // static data
-    static bool initialised;
     static HardwareTimer timer;
     static const IRQn_Type timer_interrupt_number;
     static uint32_t timer_interrupt_priority;
@@ -91,7 +88,7 @@ class SoftwareSerial : public Stream {
   public:
     // public methods
 
-    SoftwareSerial(uint16_t receivePin, uint16_t transmitPin, bool inverse_logic = false);
+    SoftwareSerial(uint16_t receivePin, uint16_t transmitPin, bool inverse_logic=false);
     virtual ~SoftwareSerial();
     void begin(long speed);
     bool listen();
@@ -115,5 +112,3 @@ class SoftwareSerial : public Stream {
 
     using Print::write;
 };
-
-#endif // SOFTWARESERIAL_H

Marlin/src/HAL/STM32/eeprom_flash.cpp

@@ -27,7 +27,7 @@
 
 #if BOTH(EEPROM_SETTINGS, FLASH_EEPROM_EMULATION)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 
 // Only STM32F4 can support wear leveling at this time

Marlin/src/HAL/STM32/eeprom_impl.cpp

@@ -24,9 +24,9 @@
 
 #include "../../inc/MarlinConfig.h"
 
-#if EITHER(USE_REAL_EEPROM, SRAM_EEPROM_EMULATION)
+#if EITHER(USE_WIRED_EEPROM, SRAM_EEPROM_EMULATION)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 bool PersistentStore::access_start() {
   return true;
@@ -41,7 +41,7 @@ bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, ui
     uint8_t v = *value;
 
     // Save to either external EEPROM, program flash or Backup SRAM
-    #if USE_REAL_EEPROM
+    #if USE_WIRED_EEPROM
       // EEPROM has only ~100,000 write cycles,
       // so only write bytes that have changed!
       uint8_t * const p = (uint8_t * const)pos;
@@ -68,7 +68,7 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
   do {
     // Read from either external EEPROM, program flash or Backup SRAM
     const uint8_t c = (
-      #if USE_REAL_EEPROM
+      #if USE_WIRED_EEPROM
         eeprom_read_byte((uint8_t*)pos)
       #else
         (*(__IO uint8_t *)(BKPSRAM_BASE + ((uint8_t*)pos)))
@@ -85,7 +85,7 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
 
 size_t PersistentStore::capacity() {
   return (
-    #if USE_REAL_EEPROM
+    #if USE_WIRED_EEPROM
       E2END + 1
     #else
       4096 // 4kB
@@ -93,5 +93,5 @@ size_t PersistentStore::capacity() {
   );
 }
 
-#endif // USE_REAL_EEPROM || SRAM_EEPROM_EMULATION
+#endif // USE_WIRED_EEPROM || SRAM_EEPROM_EMULATION
 #endif // ARDUINO_ARCH_STM32 && !STM32GENERIC

Marlin/src/HAL/STM32/eeprom_sdcard.cpp

@@ -30,7 +30,7 @@
 
 #if ENABLED(SDCARD_EEPROM_EMULATION)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 #ifndef E2END
   #define E2END 0xFFF // 4KB

Marlin/src/HAL/STM32/inc/Conditionals_post.h

@@ -20,3 +20,8 @@
  *
  */
 #pragma once
+
+// If no real EEPROM, Flash emulation, or SRAM emulation is available fall back to SD emulation
+#if ENABLED(EEPROM_SETTINGS) && NONE(USE_WIRED_EEPROM, FLASH_EEPROM_EMULATION, SRAM_EEPROM_EMULATION)
+  #define SDCARD_EEPROM_EMULATION
+#endif

Marlin/src/HAL/STM32F1/HAL.cpp

@@ -388,6 +388,6 @@ void analogWrite(pin_t pin, int pwm_val8) {
     analogWrite(uint8_t(pin), pwm_val8);
 }
 
-void flashFirmware(int16_t value) { nvic_sys_reset(); }
+void flashFirmware(const int16_t) { nvic_sys_reset(); }
 
 #endif // __STM32F1__

Marlin/src/HAL/STM32F1/HAL.h

@@ -160,6 +160,7 @@ void HAL_idletask();
 
 #ifndef digitalPinHasPWM
   #define digitalPinHasPWM(P) (PIN_MAP[P].timer_device != nullptr)
+  #define NO_COMPILE_TIME_PWM
 #endif
 
 #define CRITICAL_SECTION_START()  uint32_t primask = __get_primask(); (void)__iCliRetVal()
@@ -287,4 +288,4 @@ void analogWrite(pin_t pin, int pwm_val8); // PWM only! mul by 257 in maple!?
 #define JTAGSWD_DISABLE() afio_cfg_debug_ports(AFIO_DEBUG_NONE)
 
 #define PLATFORM_M997_SUPPORT
-void flashFirmware(int16_t value);
+void flashFirmware(const int16_t);

Marlin/src/HAL/STM32F1/eeprom.cpp

@@ -22,9 +22,9 @@
 
 #include "../../inc/MarlinConfig.h"
 
-#if USE_REAL_EEPROM
+#if USE_WIRED_EEPROM
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 bool PersistentStore::access_start() {
   #if ENABLED(SPI_EEPROM)
@@ -73,5 +73,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, size_t size, uint16_t
 
 size_t PersistentStore::capacity() { return E2END + 1; }
 
-#endif // USE_REAL_EEPROM
+#endif // USE_WIRED_EEPROM
 #endif // __STM32F1__

Marlin/src/HAL/STM32F1/eeprom_flash.cpp

@@ -31,10 +31,9 @@
 
 #include "../../inc/MarlinConfig.h"
 
-// This is for EEPROM emulation in flash
-#if BOTH(EEPROM_SETTINGS, FLASH_EEPROM_EMULATION)
+#if ENABLED(FLASH_EEPROM_EMULATION)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 #include <flash_stm32.h>
 #include <EEPROM.h>
@@ -108,5 +107,5 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, const size_t size, uin
 
 size_t PersistentStore::capacity() { return EEPROM_SIZE; }
 
-#endif // EEPROM_SETTINGS && EEPROM FLASH
+#endif // FLASH_EEPROM_EMULATION
 #endif // __STM32F1__

Marlin/src/HAL/STM32F1/eeprom_sdcard.cpp

@@ -31,7 +31,7 @@
 
 #if ENABLED(SDCARD_EEPROM_EMULATION)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 #ifndef E2END
   #define E2END 0xFFF // 4KB
@@ -101,5 +101,4 @@ bool PersistentStore::read_data(int &pos, uint8_t* value, const size_t size, uin
 size_t PersistentStore::capacity() { return HAL_EEPROM_SIZE; }
 
 #endif // SDCARD_EEPROM_EMULATION
-
 #endif // __STM32F1__

Marlin/src/HAL/STM32_F4_F7/eeprom.cpp

@@ -27,7 +27,7 @@
 
 #if ENABLED(EEPROM_SETTINGS)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 bool PersistentStore::access_start() { return true; }
 bool PersistentStore::access_finish() { return true; }

Marlin/src/HAL/STM32_F4_F7/inc/Conditionals_post.h

@@ -22,9 +22,8 @@
 #pragma once
 
 #if ENABLED(EEPROM_SETTINGS) && defined(STM32F7)
-  #undef USE_REAL_EEPROM
-  #define USE_EMULATED_EEPROM 1
+  #undef USE_WIRED_EEPROM
   #undef SRAM_EEPROM_EMULATION
   #undef SDCARD_EEPROM_EMULATION
-  #define FLASH_EEPROM_EMULATION 1
+  #define FLASH_EEPROM_EMULATION
 #endif

Marlin/src/HAL/TEENSY31_32/eeprom_impl.cpp

@@ -22,7 +22,7 @@
 
 #if ENABLED(EEPROM_SETTINGS)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 
 bool PersistentStore::access_start() { return true; }
 bool PersistentStore::access_finish() { return true; }

Marlin/src/HAL/TEENSY31_32/fastio.h

@@ -76,8 +76,9 @@
 
 #define SET_INPUT(IO)         _SET_INPUT(IO)
 #define SET_INPUT_PULLUP(IO)  _SET_INPUT_PULLUP(IO)
+#define SET_INPUT_PULLDOWN    SET_INPUT
 #define SET_OUTPUT(IO)        _SET_OUTPUT(IO)
-#define SET_PWM(IO)            SET_OUTPUT(IO)
+#define SET_PWM               SET_OUTPUT
 
 #define IS_INPUT(IO)          _IS_INPUT(IO)
 #define IS_OUTPUT(IO)         _IS_OUTPUT(IO)

Marlin/src/HAL/TEENSY31_32/inc/Conditionals_post.h

@@ -20,3 +20,8 @@
  *
  */
 #pragma once
+
+// If no real EEPROM, Flash emulation, or SRAM emulation is available fall back to SD emulation
+#if ENABLED(EEPROM_SETTINGS) && NONE(USE_WIRED_EEPROM, FLASH_EEPROM_EMULATION, SRAM_EEPROM_EMULATION)
+  #define SDCARD_EEPROM_EMULATION
+#endif

Marlin/src/HAL/TEENSY35_36/eeprom.cpp

@@ -27,7 +27,7 @@
 
 #if ENABLED(EEPROM_SETTINGS)
 
-#include "../shared/persistent_store_api.h"
+#include "../shared/eeprom_api.h"
 #include <avr/eeprom.h>
 
 bool PersistentStore::access_start() { return true; }

Marlin/src/HAL/TEENSY35_36/fastio.h

@@ -76,8 +76,9 @@
 
 #define SET_INPUT(IO)         _SET_INPUT(IO)
 #define SET_INPUT_PULLUP(IO)  _SET_INPUT_PULLUP(IO)
+#define SET_INPUT_PULLDOWN    SET_INPUT
 #define SET_OUTPUT(IO)        _SET_OUTPUT(IO)
-#define SET_PWM(IO)            SET_OUTPUT(IO)
+#define SET_PWM               SET_OUTPUT
 
 #define IS_INPUT(IO)          _IS_INPUT(IO)
 #define IS_OUTPUT(IO)         _IS_OUTPUT(IO)

Marlin/src/HAL/shared/eeprom_api.cpp

@@ -24,7 +24,7 @@
 
 #if EITHER(EEPROM_SETTINGS, SD_FIRMWARE_UPDATE)
 
-  #include "persistent_store_api.h"
+  #include "eeprom_api.h"
   PersistentStore persistentStore;
 
 #endif

Marlin/src/MarlinCore.cpp

@@ -202,7 +202,7 @@ const char NUL_STR[] PROGMEM = "",
            SP_Z_LBL[] PROGMEM = " Z:",
            SP_E_LBL[] PROGMEM = " E:";
 
-bool Running = true;
+MarlinState marlin_state = MF_INITIALIZING;
 
 // For M109 and M190, this flag may be cleared (by M108) to exit the wait loop
 bool wait_for_heatup = true;
@@ -210,6 +210,24 @@ bool wait_for_heatup = true;
 // For M0/M1, this flag may be cleared (by M108) to exit the wait-for-user loop
 #if HAS_RESUME_CONTINUE
   bool wait_for_user; // = false;
+
+  void wait_for_user_response(millis_t ms/*=0*/, const bool no_sleep/*=false*/) {
+    #if DISABLED(ADVANCED_PAUSE_FEATURE)
+      UNUSED(no_sleep);
+    #endif
+    KEEPALIVE_STATE(PAUSED_FOR_USER);
+    wait_for_user = true;
+    if (ms) ms += millis(); // expire time
+    while (wait_for_user && !(ms && ELAPSED(millis(), ms))) {
+      idle(
+        #if ENABLED(ADVANCED_PAUSE_FEATURE)
+          no_sleep
+        #endif
+      );
+    }
+    wait_for_user = false;
+  }
+
 #endif
 
 // Inactivity shutdown
@@ -418,52 +436,8 @@ void startOrResumeJob() {
   }
 
   inline void finishSDPrinting() {
-
-    bool did_state = true;
-    switch (card.sdprinting_done_state) {
-
-      case 1:
-        did_state = print_job_timer.duration() < 60 || queue.enqueue_one_P(PSTR("M31"));
-        break;
-
-      case 2:
-        did_state = queue.enqueue_one_P(PSTR("M77"));
-        break;
-
-      case 3:
-        #if ENABLED(LCD_SET_PROGRESS_MANUALLY)
-          ui.set_progress_done();
-        #endif
-        break;
-
-      case 4:                                   // Display "Click to Continue..."
-        #if HAS_RESUME_CONTINUE                 // 30 min timeout with LCD, 1 min without
-          did_state = queue.enqueue_one_P(
-            print_job_timer.duration() < 60 ? PSTR("M0Q1P1") : PSTR("M0Q1S" TERN(HAS_LCD_MENU, "1800", "60"))
-          );
-        #endif
-        break;
-
-      case 5:
-        #if ENABLED(POWER_LOSS_RECOVERY)
-          recovery.purge();
-        #endif
-
-        #if ENABLED(SD_FINISHED_STEPPERRELEASE) && defined(SD_FINISHED_RELEASECOMMAND)
-          planner.finish_and_disable();
-        #endif
-
-        #if ENABLED(SD_REPRINT_LAST_SELECTED_FILE)
-          ui.reselect_last_file();
-        #endif
-
-        SERIAL_ECHOLNPGM(STR_FILE_PRINTED);
-
-      default:
-        did_state = false;
-        card.sdprinting_done_state = 0;
-    }
-    if (did_state) ++card.sdprinting_done_state;
+    if (queue.enqueue_one_P(PSTR("M1001")))
+      marlin_state = MF_RUNNING;
   }
 
 #endif // SDSUPPORT
@@ -567,7 +541,7 @@ inline void manage_inactivity(const bool ignore_stepper_queue=false) {
   #endif
 
   #if ENABLED(USE_CONTROLLER_FAN)
-    controllerfan_update(); // Check if fan should be turned on to cool stepper drivers down
+    controllerFan.update(); // Check if fan should be turned on to cool stepper drivers down
   #endif
 
   #if ENABLED(AUTO_POWER_CONTROL)
@@ -839,7 +813,7 @@ void stop() {
     SERIAL_ERROR_MSG(STR_ERR_STOPPED);
     LCD_MESSAGEPGM(MSG_STOPPED);
     safe_delay(350);       // allow enough time for messages to get out before stopping
-    Running = false;
+    marlin_state = MF_STOPPED;
   }
 }
 
@@ -984,6 +958,10 @@ void setup() {
     SETUP_RUN(leds.setup());
   #endif
 
+  #if ENABLED(USE_CONTROLLER_FAN)     // Set up fan controller to initialize also the default configurations.
+    SETUP_RUN(controllerFan.setup());
+  #endif
+
   SETUP_RUN(ui.init());
   SETUP_RUN(ui.reset_status());       // Load welcome message early. (Retained if no errors exist.)
 
@@ -991,8 +969,8 @@ void setup() {
     SETUP_RUN(ui.show_bootscreen());
   #endif
 
-  #if ENABLED(SDSUPPORT)
-    SETUP_RUN(card.mount());          // Mount the SD card before settings.first_load
+  #if ENABLED(SDSUPPORT) && defined(SDCARD_CONNECTION) && !SD_CONNECTION_IS(LCD)
+    SETUP_RUN(card.mount());          // Mount onboard / custom SD card before settings.first_load
   #endif
 
   SETUP_RUN(settings.first_load());   // Load data from EEPROM if available (or use defaults)
@@ -1047,10 +1025,6 @@ void setup() {
     SETUP_RUN(endstops.enable_z_probe(false));
   #endif
 
-  #if ENABLED(USE_CONTROLLER_FAN)
-    SET_OUTPUT(CONTROLLER_FAN_PIN);
-  #endif
-
   #if HAS_STEPPER_RESET
     SETUP_RUN(enableStepperDrivers());
   #endif
@@ -1183,6 +1157,8 @@ void setup() {
     SETUP_RUN(max7219.init());
   #endif
 
+  marlin_state = MF_RUNNING;
+
   SETUP_LOG("setup() completed.");
 }
 
@@ -1206,7 +1182,7 @@ void loop() {
     #if ENABLED(SDSUPPORT)
       card.checkautostart();
       if (card.flag.abort_sd_printing) abortSDPrinting();
-      if (card.sdprinting_done_state) finishSDPrinting();
+      if (marlin_state == MF_SD_COMPLETE) finishSDPrinting();
     #endif
 
     queue.advance();

Marlin/src/MarlinCore.h

@@ -76,9 +76,20 @@ void minkill(const bool steppers_off=false);
 
 void quickstop_stepper();
 
-extern bool Running;
-inline bool IsRunning() { return  Running; }
-inline bool IsStopped() { return !Running; }
+// Global State of the firmware
+enum MarlinState : uint8_t {
+  MF_INITIALIZING =  0,
+  MF_RUNNING      = _BV(0),
+  MF_PAUSED       = _BV(1),
+  MF_WAITING      = _BV(2),
+  MF_STOPPED      = _BV(3),
+  MF_SD_COMPLETE  = _BV(4),
+  MF_KILLED       = _BV(7)
+};
+
+extern MarlinState marlin_state;
+inline bool IsRunning() { return marlin_state == MF_RUNNING; }
+inline bool IsStopped() { return marlin_state != MF_RUNNING; }
 
 bool printingIsActive();
 bool printingIsPaused();
@@ -88,6 +99,7 @@ extern bool wait_for_heatup;
 
 #if HAS_RESUME_CONTINUE
   extern bool wait_for_user;
+  void wait_for_user_response(millis_t ms=0, const bool no_sleep=false);
 #endif
 
 // Inactivity shutdown timer

Marlin/src/core/boards.h

@@ -103,6 +103,7 @@
 #define BOARD_HJC2560C_REV2           1147  // ADIMLab Gantry v2
 #define BOARD_TANGO                   1148  // BIQU Tango V1
 #define BOARD_MKS_GEN_L_V2            1149  // MKS GEN L V2
+#define BOARD_COPYMASTER_3D           1150  // Copymaster 3D
 
 //
 // RAMBo and derivatives
@@ -143,6 +144,7 @@
 #define BOARD_LEAPFROG_XEED2015       1321  // Leapfrog Xeed 2015
 #define BOARD_PICA_REVB               1322  // PICA Shield (original version)
 #define BOARD_PICA                    1323  // PICA Shield (rev C or later)
+#define BOARD_INTAMSYS40              1324  // Intamsys 4.0 (Funmat HT)
 
 //
 // ATmega1281, ATmega2561

Marlin/src/core/macros.h

@@ -21,6 +21,10 @@
  */
 #pragma once
 
+#if !defined(__has_include)
+  #define __has_include(...) 1
+#endif
+
 #define ABCE 4
 #define XYZE 4
 #define ABC  3
@@ -190,6 +194,9 @@
 #define DISABLED(V...)      DO(DIS,&&,V)
 
 #define TERN(O,A,B)         _TERN(_ENA_1(O),B,A)    // OPTION converted to '0' or '1'
+#define TERN0(O,A)          _TERN(_ENA_1(O),0,A)    // OPTION converted to A or '0'
+#define TERN1(O,A)          _TERN(_ENA_1(O),1,A)    // OPTION converted to A or '1'
+#define TERN_(O,A)          _TERN(_ENA_1(O),,A)     // OPTION converted to A or '<nul>'
 #define _TERN(E,V...)       __TERN(_CAT(T_,E),V)    // Prepend 'T_' to get 'T_0' or 'T_1'
 #define __TERN(T,V...)      ___TERN(_CAT(_NO,T),V)  // Prepend '_NO' to get '_NOT_0' or '_NOT_1'
 #define ___TERN(P,V...)     THIRD(P,V)              // If first argument has a comma, A. Else B.

Marlin/src/core/utility.cpp

@@ -67,7 +67,6 @@ void safe_delay(millis_t ms) {
       TERN(PROBE_MANUALLY, "PROBE_MANUALLY", "")
       TERN(NOZZLE_AS_PROBE, "NOZZLE_AS_PROBE", "")
       TERN(FIX_MOUNTED_PROBE, "FIX_MOUNTED_PROBE", "")
-      TERN(BLTOUCH, "BLTOUCH", "")
       TERN(HAS_Z_SERVO_PROBE, TERN(BLTOUCH, "BLTOUCH", "SERVO PROBE"), "")
       TERN(TOUCH_MI_PROBE, "TOUCH_MI_PROBE", "")
       TERN(Z_PROBE_SLED, "Z_PROBE_SLED", "")

Marlin/src/feature/backlash.cpp

@@ -113,7 +113,7 @@ void Backlash::add_correction_steps(const int32_t &da, const int32_t &db, const
             error_correction = 0; // Don't take up any backlash in this segment, as it would subtract steps
         }
       #endif
-      // Making a correction reduces the residual error and modifies delta_mm
+      // Making a correction reduces the residual error and adds block steps
       if (error_correction) {
         block->steps[axis] += ABS(error_correction);
         residual_error[axis] -= error_correction;

Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp

@@ -27,7 +27,7 @@
   #include "../bedlevel.h"
 
   #include "../../../MarlinCore.h"
-  #include "../../../HAL/shared/persistent_store_api.h"
+  #include "../../../HAL/shared/eeprom_api.h"
   #include "../../../libs/hex_print_routines.h"
   #include "../../../module/configuration_store.h"
   #include "../../../lcd/ultralcd.h"
@@ -1611,7 +1611,7 @@
          * numbers for those locations should be 0.
          */
         #ifdef VALIDATE_MESH_TILT
-          auto d_from = []() { DEBUG_ECHOPGM("D from "); };
+          auto d_from = []{ DEBUG_ECHOPGM("D from "); };
           auto normed = [&](const xy_pos_t &pos, const float &zadd) {
             return normal.x * pos.x + normal.y * pos.y + zadd;
           };

Marlin/src/feature/controllerfan.cpp

@@ -24,60 +24,80 @@
 
 #if ENABLED(USE_CONTROLLER_FAN)
 
+#include "controllerfan.h"
 #include "../module/stepper/indirection.h"
 #include "../module/temperature.h"
 
-uint8_t controllerfan_speed;
+ControllerFan controllerFan;
 
-void controllerfan_update() {
-  static millis_t lastMotorOn = 0, // Last time a motor was turned on
+uint8_t ControllerFan::speed;
+
+#if ENABLED(CONTROLLER_FAN_EDITABLE)
+  controllerFan_settings_t ControllerFan::settings; // {0}
+#endif
+
+void ControllerFan::setup() {
+  SET_OUTPUT(CONTROLLER_FAN_PIN);
+  init();
+}
+
+void ControllerFan::set_fan_speed(const uint8_t s) {
+  speed = s < (CONTROLLERFAN_SPEED_MIN) ? 0 : s; // Fan OFF below minimum
+}
+
+void ControllerFan::update() {
+  static millis_t lastMotorOn = 0,    // Last time a motor was turned on
                   nextMotorCheck = 0; // Last time the state was checked
   const millis_t ms = millis();
   if (ELAPSED(ms, nextMotorCheck)) {
     nextMotorCheck = ms + 2500UL; // Not a time critical function, so only check every 2.5s
 
-    const bool xory = X_ENABLE_READ() == bool(X_ENABLE_ON) || Y_ENABLE_READ() == bool(Y_ENABLE_ON);
+    #define MOTOR_IS_ON(A,B) (A##_ENABLE_READ() == bool(B##_ENABLE_ON))
+    #define _OR_ENABLED_E(N) || MOTOR_IS_ON(E##N,E)
 
-    // If any of the drivers or the bed are enabled...
-    if (xory || Z_ENABLE_READ() == bool(Z_ENABLE_ON)
+    const bool motor_on = MOTOR_IS_ON(Z,Z)
+      #if HAS_Z2_ENABLE
+        || MOTOR_IS_ON(Z2,Z)
+      #endif
+      #if HAS_Z3_ENABLE
+        || MOTOR_IS_ON(Z3,Z)
+      #endif
+      #if HAS_Z4_ENABLE
+        || MOTOR_IS_ON(Z4,Z)
+      #endif
+      || (DISABLED(CONTROLLER_FAN_USE_Z_ONLY) && (
+          MOTOR_IS_ON(X,X) || MOTOR_IS_ON(Y,Y)
+          #if HAS_X2_ENABLE
+            || MOTOR_IS_ON(X2,X)
+          #endif
+          #if HAS_Y2_ENABLE
+            || MOTOR_IS_ON(Y2,Y)
+          #endif
+          #if E_STEPPERS
+            REPEAT(E_STEPPERS, _OR_ENABLED_E)
+          #endif
+        )
+      )
+    ;
+
+    // If any of the drivers or the heated bed are enabled...
+    if (motor_on
       #if HAS_HEATED_BED
         || thermalManager.temp_bed.soft_pwm_amount > 0
       #endif
-      #if HAS_X2_ENABLE
-        || X2_ENABLE_READ() == bool(X_ENABLE_ON)
-      #endif
-      #if HAS_Y2_ENABLE
-        || Y2_ENABLE_READ() == bool(Y_ENABLE_ON)
-      #endif
-      #if HAS_Z2_ENABLE
-        || Z2_ENABLE_READ() == bool(Z_ENABLE_ON)
-      #endif
-      #if HAS_Z3_ENABLE
-        || Z3_ENABLE_READ() == bool(Z_ENABLE_ON)
-      #endif
-      #if HAS_Z4_ENABLE
-        || Z4_ENABLE_READ() == bool(Z_ENABLE_ON)
-      #endif
-      #if E_STEPPERS
-        #define _OR_ENABLED_E(N) || E##N##_ENABLE_READ() == bool(E_ENABLE_ON)
-        REPEAT(E_STEPPERS, _OR_ENABLED_E)
-      #endif
-    ) {
-      lastMotorOn = ms; //... set time to NOW so the fan will turn on
-    }
+    ) lastMotorOn = ms; //... set time to NOW so the fan will turn on
 
-    // Fan off if no steppers have been enabled for CONTROLLERFAN_SECS seconds
-    controllerfan_speed = (!lastMotorOn || ELAPSED(ms, lastMotorOn + (CONTROLLERFAN_SECS) * 1000UL)) ? 0 : (
-      #ifdef CONTROLLERFAN_SPEED_Z_ONLY
-        xory ? CONTROLLERFAN_SPEED : CONTROLLERFAN_SPEED_Z_ONLY
-      #else
-        CONTROLLERFAN_SPEED
-      #endif
+    // Fan Settings. Set fan > 0:
+    //  - If AutoMode is on and steppers have been enabled for CONTROLLERFAN_IDLE_TIME seconds.
+    //  - If System is on idle and idle fan speed settings is activated.
+    set_fan_speed(
+      settings.auto_mode && lastMotorOn && PENDING(ms, lastMotorOn + settings.duration * 1000UL)
+      ? settings.active_speed : settings.idle_speed
     );
 
     // Allow digital or PWM fan output (see M42 handling)
-    WRITE(CONTROLLER_FAN_PIN, controllerfan_speed);
-    analogWrite(pin_t(CONTROLLER_FAN_PIN), controllerfan_speed);
+    WRITE(CONTROLLER_FAN_PIN, speed);
+    analogWrite(pin_t(CONTROLLER_FAN_PIN), speed);
   }
 }
 

Marlin/src/feature/controllerfan.h

@@ -21,4 +21,56 @@
  */
 #pragma once
 
-void controllerfan_update();
+#include "../inc/MarlinConfigPre.h"
+
+typedef struct {
+  uint8_t   active_speed,    // 0-255 (fullspeed); Speed with enabled stepper motors
+            idle_speed;      // 0-255 (fullspeed); Speed after idle period with all motors are disabled
+  uint16_t  duration;        // Duration in seconds for the fan to run after all motors are disabled
+  bool      auto_mode;       // Default true
+} controllerFan_settings_t;
+
+#ifndef CONTROLLERFAN_SPEED_ACTIVE
+  #define CONTROLLERFAN_SPEED_ACTIVE 255
+#endif
+#ifndef CONTROLLERFAN_SPEED_IDLE
+  #define CONTROLLERFAN_SPEED_IDLE     0
+#endif
+#ifndef CONTROLLERFAN_IDLE_TIME
+  #define CONTROLLERFAN_IDLE_TIME     60
+#endif
+
+static constexpr controllerFan_settings_t controllerFan_defaults = {
+  CONTROLLERFAN_SPEED_ACTIVE,
+  CONTROLLERFAN_SPEED_IDLE,
+  CONTROLLERFAN_IDLE_TIME,
+  true
+};
+
+#if ENABLED(USE_CONTROLLER_FAN)
+
+class ControllerFan {
+  private:
+    static uint8_t speed;
+    static void set_fan_speed(const uint8_t s);
+
+  public:
+    #if ENABLED(CONTROLLER_FAN_EDITABLE)
+      static controllerFan_settings_t settings;
+    #else
+      static const controllerFan_settings_t constexpr &settings = controllerFan_defaults;
+    #endif
+    static inline bool state() { return speed > 0; }
+    static inline void init() { reset(); }
+    static inline void reset() {
+      #if ENABLED(CONTROLLER_FAN_EDITABLE)
+        settings = controllerFan_defaults;
+      #endif
+    }
+    static void setup();
+    static void update();
+};
+
+extern ControllerFan controllerFan;
+
+#endif

Marlin/src/feature/max7219.cpp

@@ -121,7 +121,7 @@ uint8_t Max7219::suspended; // = 0;
   #define CRITICAL_SECTION_START() NOOP
   #define CRITICAL_SECTION_END()   NOOP
 #else
-  #define SIG_DELAY() DELAY_NS(188) // Delay for 0.1875µs (16MHz AVR) or 0.15µs (20MHz AVR)
+  #define SIG_DELAY() DELAY_NS(250)
 #endif
 
 void Max7219::error(const char * const func, const int32_t v1, const int32_t v2/*=-1*/) {

Marlin/src/feature/mmu2/mmu2.cpp

@@ -707,14 +707,13 @@ void MMU2::filament_runout() {
     if (recover)  {
       LCD_MESSAGEPGM(MSG_MMU2_EJECT_RECOVER);
       BUZZ(200, 404);
-      wait_for_user = true;
       #if ENABLED(HOST_PROMPT_SUPPORT)
         host_prompt_do(PROMPT_USER_CONTINUE, PSTR("MMU2 Eject Recover"), CONTINUE_STR);
       #endif
       #if ENABLED(EXTENSIBLE_UI)
         ExtUI::onUserConfirmRequired_P(PSTR("MMU2 Eject Recover"));
       #endif
-      while (wait_for_user) idle();
+      wait_for_user_response();
       BUZZ(200, 404);
       BUZZ(200, 404);
 

Marlin/src/feature/pause.cpp

@@ -134,15 +134,6 @@ static bool ensure_safe_temperature(const PauseMode mode=PAUSE_MODE_SAME) {
   return thermalManager.wait_for_hotend(active_extruder);
 }
 
-void do_pause_e_move(const float &length, const feedRate_t &fr_mm_s) {
-  #if HAS_FILAMENT_SENSOR
-    runout.reset();
-  #endif
-  current_position.e += length / planner.e_factor[active_extruder];
-  line_to_current_position(fr_mm_s);
-  planner.synchronize();
-}
-
 /**
  * Load filament into the hotend
  *
@@ -184,7 +175,6 @@ bool load_filament(const float &slow_load_length/*=0*/, const float &fast_load_l
     #endif
 
     KEEPALIVE_STATE(PAUSED_FOR_USER);
-    wait_for_user = true;    // LCD click or M108 will clear this
     #if ENABLED(HOST_PROMPT_SUPPORT)
       const char tool = '0'
         #if NUM_RUNOUT_SENSORS > 1
@@ -218,7 +208,7 @@ bool load_filament(const float &slow_load_length/*=0*/, const float &fast_load_l
   #endif
 
   // Slow Load filament
-  if (slow_load_length) do_pause_e_move(slow_load_length, FILAMENT_CHANGE_SLOW_LOAD_FEEDRATE);
+  if (slow_load_length) unscaled_e_move(slow_load_length, FILAMENT_CHANGE_SLOW_LOAD_FEEDRATE);
 
   // Fast Load Filament
   if (fast_load_length) {
@@ -227,7 +217,7 @@ bool load_filament(const float &slow_load_length/*=0*/, const float &fast_load_l
       planner.settings.retract_acceleration = FILAMENT_CHANGE_FAST_LOAD_ACCEL;
     #endif
 
-    do_pause_e_move(fast_load_length, FILAMENT_CHANGE_FAST_LOAD_FEEDRATE);
+    unscaled_e_move(fast_load_length, FILAMENT_CHANGE_FAST_LOAD_FEEDRATE);
 
     #if FILAMENT_CHANGE_FAST_LOAD_ACCEL > 0
       planner.settings.retract_acceleration = saved_acceleration;
@@ -246,15 +236,15 @@ bool load_filament(const float &slow_load_length/*=0*/, const float &fast_load_l
       if (show_lcd) lcd_pause_show_message(PAUSE_MESSAGE_PURGE);
     #endif
 
-    wait_for_user = true;
     #if ENABLED(HOST_PROMPT_SUPPORT)
       host_prompt_do(PROMPT_USER_CONTINUE, PSTR("Filament Purging..."), CONTINUE_STR);
     #endif
     #if ENABLED(EXTENSIBLE_UI)
       ExtUI::onUserConfirmRequired_P(PSTR("Filament Purging..."));
     #endif
+    wait_for_user = true; // A click or M108 breaks the purge_length loop
     for (float purge_count = purge_length; purge_count > 0 && wait_for_user; --purge_count)
-      do_pause_e_move(1, ADVANCED_PAUSE_PURGE_FEEDRATE);
+      unscaled_e_move(1, ADVANCED_PAUSE_PURGE_FEEDRATE);
     wait_for_user = false;
 
   #else
@@ -267,7 +257,7 @@ bool load_filament(const float &slow_load_length/*=0*/, const float &fast_load_l
         #endif
 
         // Extrude filament to get into hotend
-        do_pause_e_move(purge_length, ADVANCED_PAUSE_PURGE_FEEDRATE);
+        unscaled_e_move(purge_length, ADVANCED_PAUSE_PURGE_FEEDRATE);
       }
 
       #if ENABLED(HOST_PROMPT_SUPPORT)
@@ -332,13 +322,13 @@ bool unload_filament(const float &unload_length, const bool show_lcd/*=false*/,
   #endif
 
   // Retract filament
-  do_pause_e_move(-(FILAMENT_UNLOAD_PURGE_RETRACT) * mix_multiplier, (PAUSE_PARK_RETRACT_FEEDRATE) * mix_multiplier);
+  unscaled_e_move(-(FILAMENT_UNLOAD_PURGE_RETRACT) * mix_multiplier, (PAUSE_PARK_RETRACT_FEEDRATE) * mix_multiplier);
 
   // Wait for filament to cool
   safe_delay(FILAMENT_UNLOAD_PURGE_DELAY);
 
   // Quickly purge
-  do_pause_e_move((FILAMENT_UNLOAD_PURGE_RETRACT + FILAMENT_UNLOAD_PURGE_LENGTH) * mix_multiplier,
+  unscaled_e_move((FILAMENT_UNLOAD_PURGE_RETRACT + FILAMENT_UNLOAD_PURGE_LENGTH) * mix_multiplier,
                   (FILAMENT_UNLOAD_PURGE_FEEDRATE) * mix_multiplier);
 
   // Unload filament
@@ -347,7 +337,7 @@ bool unload_filament(const float &unload_length, const bool show_lcd/*=false*/,
     planner.settings.retract_acceleration = FILAMENT_CHANGE_UNLOAD_ACCEL;
   #endif
 
-  do_pause_e_move(unload_length * mix_multiplier, (FILAMENT_CHANGE_UNLOAD_FEEDRATE) * mix_multiplier);
+  unscaled_e_move(unload_length * mix_multiplier, (FILAMENT_CHANGE_UNLOAD_FEEDRATE) * mix_multiplier);
 
   #if FILAMENT_CHANGE_FAST_LOAD_ACCEL > 0
     planner.settings.retract_acceleration = saved_acceleration;
@@ -437,7 +427,7 @@ bool pause_print(const float &retract, const xyz_pos_t &park_point, const float
 
   // Initial retract before move to filament change position
   if (retract && thermalManager.hotEnoughToExtrude(active_extruder))
-    do_pause_e_move(retract, PAUSE_PARK_RETRACT_FEEDRATE);
+    unscaled_e_move(retract, PAUSE_PARK_RETRACT_FEEDRATE);
 
   // Park the nozzle by moving up by z_lift and then moving to (x_pos, y_pos)
   if (!axes_need_homing())
@@ -508,13 +498,13 @@ void wait_for_confirmation(const bool is_reload/*=false*/, const int8_t max_beep
 
   // Wait for filament insert by user and press button
   KEEPALIVE_STATE(PAUSED_FOR_USER);
-  wait_for_user = true;    // LCD click or M108 will clear this
   #if ENABLED(HOST_PROMPT_SUPPORT)
     host_prompt_do(PROMPT_USER_CONTINUE, PSTR("Nozzle Parked"), CONTINUE_STR);
   #endif
   #if ENABLED(EXTENSIBLE_UI)
     ExtUI::onUserConfirmRequired_P(PSTR("Nozzle Parked"));
   #endif
+  wait_for_user = true;    // LCD click or M108 will clear this
   while (wait_for_user) {
     #if HAS_BUZZER
       filament_change_beep(max_beep_count);
@@ -540,8 +530,7 @@ void wait_for_confirmation(const bool is_reload/*=false*/, const int8_t max_beep
         ExtUI::onUserConfirmRequired_P(PSTR("HeaterTimeout"));
       #endif
 
-      // Wait for LCD click or M108
-      while (wait_for_user) idle_no_sleep();
+      wait_for_user_response(0, true); // Wait for LCD click or M108
 
       #if ENABLED(HOST_PROMPT_SUPPORT)
         host_prompt_do(PROMPT_INFO, PSTR("Reheating"));
@@ -633,11 +622,11 @@ void resume_print(const float &slow_load_length/*=0*/, const float &fast_load_le
   #if ENABLED(FWRETRACT)
     // If retracted before goto pause
     if (fwretract.retracted[active_extruder])
-      do_pause_e_move(-fwretract.settings.retract_length, fwretract.settings.retract_feedrate_mm_s);
+      unscaled_e_move(-fwretract.settings.retract_length, fwretract.settings.retract_feedrate_mm_s);
   #endif
 
   // If resume_position is negative
-  if (resume_position.e < 0) do_pause_e_move(resume_position.e, feedRate_t(PAUSE_PARK_RETRACT_FEEDRATE));
+  if (resume_position.e < 0) unscaled_e_move(resume_position.e, feedRate_t(PAUSE_PARK_RETRACT_FEEDRATE));
 
   // Move XY to starting position, then Z
   do_blocking_move_to_xy(resume_position, feedRate_t(NOZZLE_PARK_XY_FEEDRATE));
@@ -646,7 +635,7 @@ void resume_print(const float &slow_load_length/*=0*/, const float &fast_load_le
   do_blocking_move_to_z(resume_position.z, feedRate_t(NOZZLE_PARK_Z_FEEDRATE));
 
   #if ADVANCED_PAUSE_RESUME_PRIME != 0
-    do_pause_e_move(ADVANCED_PAUSE_RESUME_PRIME, feedRate_t(ADVANCED_PAUSE_PURGE_FEEDRATE));
+    unscaled_e_move(ADVANCED_PAUSE_RESUME_PRIME, feedRate_t(ADVANCED_PAUSE_PURGE_FEEDRATE));
   #endif
 
   // Now all extrusion positions are resumed and ready to be confirmed

Marlin/src/feature/pause.h

@@ -83,8 +83,6 @@ extern uint8_t did_pause_print;
   #define DXC_PASS
 #endif
 
-void do_pause_e_move(const float &length, const feedRate_t &fr_mm_s);
-
 bool pause_print(const float &retract, const xyz_pos_t &park_point, const float &unload_length=0, const bool show_lcd=false DXC_PARAMS);
 
 void wait_for_confirmation(const bool is_reload=false, const int8_t max_beep_count=0 DXC_PARAMS);

Marlin/src/feature/power.cpp

@@ -46,8 +46,8 @@ bool Power::is_power_needed() {
     HOTEND_LOOP() if (thermalManager.autofan_speed[e]) return true;
   #endif
 
-  #if ENABLED(AUTO_POWER_CONTROLLERFAN, USE_CONTROLLER_FAN) && HAS_CONTROLLER_FAN
-    if (controllerfan_speed) return true;
+  #if BOTH(USE_CONTROLLER_FAN, AUTO_POWER_CONTROLLERFAN)
+    if (controllerFan.state()) return true;
   #endif
 
   #if ENABLED(AUTO_POWER_CHAMBER_FAN)

Marlin/src/feature/twibus.cpp

@@ -49,37 +49,27 @@ void TWIBus::address(const uint8_t adr) {
 
   addr = adr;
 
-  #if ENABLED(DEBUG_TWIBUS)
-    debug(PSTR("address"), adr);
-  #endif
+  debug(PSTR("address"), adr);
 }
 
 void TWIBus::addbyte(const char c) {
   if (buffer_s >= COUNT(buffer)) return;
   buffer[buffer_s++] = c;
-  #if ENABLED(DEBUG_TWIBUS)
-    debug(PSTR("addbyte"), c);
-  #endif
+  debug(PSTR("addbyte"), c);
 }
 
 void TWIBus::addbytes(char src[], uint8_t bytes) {
-  #if ENABLED(DEBUG_TWIBUS)
-    debug(PSTR("addbytes"), bytes);
-  #endif
+  debug(PSTR("addbytes"), bytes);
   while (bytes--) addbyte(*src++);
 }
 
 void TWIBus::addstring(char str[]) {
-  #if ENABLED(DEBUG_TWIBUS)
-    debug(PSTR("addstring"), str);
-  #endif
+  debug(PSTR("addstring"), str);
   while (char c = *str++) addbyte(c);
 }
 
 void TWIBus::send() {
-  #if ENABLED(DEBUG_TWIBUS)
-    debug(PSTR("send"), addr);
-  #endif
+  debug(PSTR("send"), addr);
 
   Wire.beginTransmission(I2C_ADDRESS(addr));
   Wire.write(buffer, buffer_s);
@@ -89,21 +79,21 @@ void TWIBus::send() {
 }
 
 // static
-void TWIBus::echoprefix(uint8_t bytes, const char prefix[], uint8_t adr) {
+void TWIBus::echoprefix(uint8_t bytes, const char pref[], uint8_t adr) {
   SERIAL_ECHO_START();
-  serialprintPGM(prefix);
+  serialprintPGM(pref);
   SERIAL_ECHOPAIR(": from:", adr, " bytes:", bytes, " data:");
 }
 
 // static
-void TWIBus::echodata(uint8_t bytes, const char prefix[], uint8_t adr) {
-  echoprefix(bytes, prefix, adr);
+void TWIBus::echodata(uint8_t bytes, const char pref[], uint8_t adr) {
+  echoprefix(bytes, pref, adr);
   while (bytes-- && Wire.available()) SERIAL_CHAR(Wire.read());
   SERIAL_EOL();
 }
 
-void TWIBus::echobuffer(const char prefix[], uint8_t adr) {
-  echoprefix(buffer_s, prefix, adr);
+void TWIBus::echobuffer(const char pref[], uint8_t adr) {
+  echoprefix(buffer_s, pref, adr);
   LOOP_L_N(i, buffer_s) SERIAL_CHAR(buffer[i]);
   SERIAL_EOL();
 }
@@ -111,15 +101,11 @@ void TWIBus::echobuffer(const char prefix[], uint8_t adr) {
 bool TWIBus::request(const uint8_t bytes) {
   if (!addr) return false;
 
-  #if ENABLED(DEBUG_TWIBUS)
-    debug(PSTR("request"), bytes);
-  #endif
+  debug(PSTR("request"), bytes);
 
   // requestFrom() is a blocking function
   if (Wire.requestFrom(addr, bytes) == 0) {
-    #if ENABLED(DEBUG_TWIBUS)
-      debug("request fail", addr);
-    #endif
+    debug("request fail", addr);
     return false;
   }
 
@@ -127,9 +113,7 @@ bool TWIBus::request(const uint8_t bytes) {
 }
 
 void TWIBus::relay(const uint8_t bytes) {
-  #if ENABLED(DEBUG_TWIBUS)
-    debug(PSTR("relay"), bytes);
-  #endif
+  debug(PSTR("relay"), bytes);
 
   if (request(bytes))
     echodata(bytes, PSTR("i2c-reply"), addr);
@@ -141,9 +125,7 @@ uint8_t TWIBus::capture(char *dst, const uint8_t bytes) {
   while (count < bytes && Wire.available())
     dst[count++] = Wire.read();
 
-  #if ENABLED(DEBUG_TWIBUS)
-    debug(PSTR("capture"), count);
-  #endif
+  debug(PSTR("capture"), count);
 
   return count;
 }
@@ -156,16 +138,12 @@ void TWIBus::flush() {
 #if I2C_SLAVE_ADDRESS > 0
 
   void TWIBus::receive(uint8_t bytes) {
-    #if ENABLED(DEBUG_TWIBUS)
-      debug(PSTR("receive"), bytes);
-    #endif
+    debug(PSTR("receive"), bytes);
     echodata(bytes, PSTR("i2c-receive"), 0);
   }
 
   void TWIBus::reply(char str[]/*=nullptr*/) {
-    #if ENABLED(DEBUG_TWIBUS)
-      debug(PSTR("reply"), str);
-    #endif
+    debug(PSTR("reply"), str);
 
     if (str) {
       reset();

Marlin/src/feature/twibus.h

@@ -223,7 +223,6 @@ class TWIBus {
     #endif
 
     #if ENABLED(DEBUG_TWIBUS)
-
       /**
        * @brief Prints a debug message
        * @details Prints a simple debug message "TWIBus::function: value"
@@ -233,6 +232,10 @@ class TWIBus {
       static void debug(const char func[], char c);
       static void debug(const char func[], char adr[]);
       static inline void debug(const char func[], uint8_t v) { debug(func, (uint32_t)v); }
-
+    #else
+      static inline void debug(const char[], uint32_t) {}
+      static inline void debug(const char[], char) {}
+      static inline void debug(const char[], char[]) {}
+      static inline void debug(const char[], uint8_t) {}
     #endif
 };

Marlin/src/gcode/bedlevel/abl/G29.cpp

@@ -934,7 +934,12 @@ G29_TYPE GcodeSuite::G29() {
 
         // Unapply the offset because it is going to be immediately applied
         // and cause compensation movement in Z
-        current_position.z -= bilinear_z_offset(current_position);
+        #if ENABLED(ENABLE_LEVELING_FADE_HEIGHT)
+          const float fade_scaling_factor = planner.fade_scaling_factor_for_z(current_position.z);
+        #else
+          constexpr float fade_scaling_factor = 1.0f;
+        #endif
+        current_position.z -= fade_scaling_factor * bilinear_z_offset(current_position);
 
         if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPAIR(" corrected Z:", current_position.z);
       }

Marlin/src/gcode/calibrate/G28.cpp

@@ -255,28 +255,28 @@ void GcodeSuite::G28() {
   #define HAS_HOMING_CURRENT (HAS_CURRENT_HOME(X) || HAS_CURRENT_HOME(X2) || HAS_CURRENT_HOME(Y) || HAS_CURRENT_HOME(Y2))
 
   #if HAS_HOMING_CURRENT
-    auto debug_current = [](const char * const s, const int16_t a, const int16_t b){
-      DEBUG_ECHO(s); DEBUG_ECHOLNPAIR(" current: ", a, " -> ", b);
+    auto debug_current = [](PGM_P const s, const int16_t a, const int16_t b){
+      serialprintPGM(s); DEBUG_ECHOLNPAIR(" current: ", a, " -> ", b);
     };
     #if HAS_CURRENT_HOME(X)
       const int16_t tmc_save_current_X = stepperX.getMilliamps();
       stepperX.rms_current(X_CURRENT_HOME);
-      if (DEBUGGING(LEVELING)) debug_current("X", tmc_save_current_X, X_CURRENT_HOME);
+      if (DEBUGGING(LEVELING)) debug_current(PSTR("X"), tmc_save_current_X, X_CURRENT_HOME);
     #endif
     #if HAS_CURRENT_HOME(X2)
       const int16_t tmc_save_current_X2 = stepperX2.getMilliamps();
       stepperX2.rms_current(X2_CURRENT_HOME);
-      if (DEBUGGING(LEVELING)) debug_current("X2", tmc_save_current_X2, X2_CURRENT_HOME);
+      if (DEBUGGING(LEVELING)) debug_current(PSTR("X2"), tmc_save_current_X2, X2_CURRENT_HOME);
     #endif
     #if HAS_CURRENT_HOME(Y)
       const int16_t tmc_save_current_Y = stepperY.getMilliamps();
       stepperY.rms_current(Y_CURRENT_HOME);
-      if (DEBUGGING(LEVELING)) debug_current("Y", tmc_save_current_Y, Y_CURRENT_HOME);
+      if (DEBUGGING(LEVELING)) debug_current(PSTR("Y"), tmc_save_current_Y, Y_CURRENT_HOME);
     #endif
     #if HAS_CURRENT_HOME(Y2)
       const int16_t tmc_save_current_Y2 = stepperY2.getMilliamps();
       stepperY2.rms_current(Y2_CURRENT_HOME);
-      if (DEBUGGING(LEVELING)) debug_current("Y2", tmc_save_current_Y2, Y2_CURRENT_HOME);
+      if (DEBUGGING(LEVELING)) debug_current(PSTR("Y2"), tmc_save_current_Y2, Y2_CURRENT_HOME);
     #endif
   #endif
 
@@ -345,12 +345,8 @@ void GcodeSuite::G28() {
     #endif
 
     // Home Y (before X)
-    #if ENABLED(HOME_Y_BEFORE_X)
-
-      if (doY || (doX && ENABLED(CODEPENDENT_XY_HOMING)))
-        homeaxis(Y_AXIS);
-
-    #endif
+    if (ENABLED(HOME_Y_BEFORE_X) && (doY || (ENABLED(CODEPENDENT_XY_HOMING) && doX)))
+      homeaxis(Y_AXIS);
 
     // Home X
     if (doX || (doY && ENABLED(CODEPENDENT_XY_HOMING) && DISABLED(HOME_Y_BEFORE_X))) {

Marlin/src/gcode/calibrate/G34_M422.cpp

@@ -203,7 +203,7 @@ void GcodeSuite::G34() {
         const uint8_t iprobe = (iteration & 1) ? NUM_Z_STEPPER_DRIVERS - 1 - i : i;
 
         // Safe clearance even on an incline
-        if (iteration == 0 || i > 0) do_blocking_move_to_z(z_probe);
+        if ((iteration == 0 || i > 0) && z_probe > current_position.z) do_blocking_move_to_z(z_probe);
 
         if (DEBUGGING(LEVELING))
           DEBUG_ECHOLNPAIR_P(PSTR("Probing X"), z_stepper_align.xy[iprobe].x, SP_Y_STR, z_stepper_align.xy[iprobe].y);

Marlin/src/gcode/calibrate/G425.cpp

@@ -37,6 +37,21 @@
 #include "../../module/endstops.h"
 #include "../../feature/bedlevel/bedlevel.h"
 
+#if !AXIS_CAN_CALIBRATE(X)
+  #undef CALIBRATION_MEASURE_LEFT
+  #undef CALIBRATION_MEASURE_RIGHT
+#endif
+
+#if !AXIS_CAN_CALIBRATE(Y)
+  #undef CALIBRATION_MEASURE_FRONT
+  #undef CALIBRATION_MEASURE_BACK
+#endif
+
+#if !AXIS_CAN_CALIBRATE(Z)
+  #undef CALIBRATION_MEASURE_AT_TOP_EDGES
+#endif
+
+
 /**
  * G425 backs away from the calibration object by various distances
  * depending on the confidence level:
@@ -207,42 +222,52 @@ inline float measure(const AxisEnum axis, const int dir, const bool stop_state,
 inline void probe_side(measurements_t &m, const float uncertainty, const side_t side, const bool probe_top_at_edge=false) {
   const xyz_float_t dimensions = CALIBRATION_OBJECT_DIMENSIONS;
   AxisEnum axis;
-  float dir;
+  float dir = 1;
 
   park_above_object(m, uncertainty);
 
   switch (side) {
-    case TOP: {
-      const float measurement = measure(Z_AXIS, -1, true, &m.backlash[TOP], uncertainty);
-      m.obj_center.z = measurement - dimensions.z / 2;
-      m.obj_side[TOP] = measurement;
-      return;
-    }
-    case RIGHT: axis = X_AXIS; dir = -1; break;
-    case FRONT: axis = Y_AXIS; dir =  1; break;
-    case LEFT:  axis = X_AXIS; dir =  1; break;
-    case BACK:  axis = Y_AXIS; dir = -1; break;
+    #if AXIS_CAN_CALIBRATE(Z)
+      case TOP: {
+        const float measurement = measure(Z_AXIS, -1, true, &m.backlash[TOP], uncertainty);
+        m.obj_center.z = measurement - dimensions.z / 2;
+        m.obj_side[TOP] = measurement;
+        return;
+      }
+    #endif
+    #if AXIS_CAN_CALIBRATE(X)
+      case LEFT:  axis = X_AXIS; break;
+      case RIGHT: axis = X_AXIS; dir = -1; break;
+    #endif
+    #if AXIS_CAN_CALIBRATE(Y)
+      case FRONT: axis = Y_AXIS; break;
+      case BACK:  axis = Y_AXIS; dir = -1; break;
+    #endif
     default: return;
   }
 
   if (probe_top_at_edge) {
-    // Probe top nearest the side we are probing
-    current_position[axis] = m.obj_center[axis] + (-dir) * (dimensions[axis] / 2 - m.nozzle_outer_dimension[axis]);
-    calibration_move();
-    m.obj_side[TOP] = measure(Z_AXIS, -1, true, &m.backlash[TOP], uncertainty);
-    m.obj_center.z = m.obj_side[TOP] - dimensions.z / 2;
+    #if AXIS_CAN_CALIBRATE(Z)
+      // Probe top nearest the side we are probing
+      current_position[axis] = m.obj_center[axis] + (-dir) * (dimensions[axis] / 2 - m.nozzle_outer_dimension[axis]);
+      calibration_move();
+      m.obj_side[TOP] = measure(Z_AXIS, -1, true, &m.backlash[TOP], uncertainty);
+      m.obj_center.z = m.obj_side[TOP] - dimensions.z / 2;
+    #endif
   }
 
-  // Move to safe distance to the side of the calibration object
-  current_position[axis] = m.obj_center[axis] + (-dir) * (dimensions[axis] / 2 + m.nozzle_outer_dimension[axis] / 2 + uncertainty);
-  calibration_move();
+  if (AXIS_CAN_CALIBRATE(X) && axis == X_AXIS || AXIS_CAN_CALIBRATE(Y) && axis == Y_AXIS) {
+    // Move to safe distance to the side of the calibration object
+    current_position[axis] = m.obj_center[axis] + (-dir) * (dimensions[axis] / 2 + m.nozzle_outer_dimension[axis] / 2 + uncertainty);
+    calibration_move();
 
-  // Plunge below the side of the calibration object and measure
-  current_position.z = m.obj_side[TOP] - CALIBRATION_NOZZLE_TIP_HEIGHT * 0.7;
-  calibration_move();
-  const float measurement = measure(axis, dir, true, &m.backlash[side], uncertainty);
-  m.obj_center[axis] = measurement + dir * (dimensions[axis] / 2 + m.nozzle_outer_dimension[axis] / 2);
-  m.obj_side[side] = measurement;
+    // Plunge below the side of the calibration object and measure
+    current_position.z = m.obj_side[TOP] - (CALIBRATION_NOZZLE_TIP_HEIGHT) * 0.7f;
+    calibration_move();
+    const float measurement = measure(axis, dir, true, &m.backlash[side], uncertainty);
+    m.obj_center[axis] = measurement + dir * (dimensions[axis] / 2 + m.nozzle_outer_dimension[axis] / 2);
+    m.obj_side[side] = measurement;
+  }
 }
 
 /**
@@ -252,7 +277,7 @@ inline void probe_side(measurements_t &m, const float uncertainty, const side_t
  *   uncertainty        in     - How far away from the calibration object to begin probing
  */
 inline void probe_sides(measurements_t &m, const float uncertainty) {
-  #ifdef CALIBRATION_MEASURE_AT_TOP_EDGES
+  #if ENABLED(CALIBRATION_MEASURE_AT_TOP_EDGES)
     constexpr bool probe_top_at_edge = true;
   #else
     // Probing at the exact center only works if the center is flat. Probing on a washer
@@ -261,18 +286,18 @@ inline void probe_sides(measurements_t &m, const float uncertainty) {
     probe_side(m, uncertainty, TOP);
   #endif
 
-  #ifdef CALIBRATION_MEASURE_RIGHT
+  #if ENABLED(CALIBRATION_MEASURE_RIGHT)
     probe_side(m, uncertainty, RIGHT, probe_top_at_edge);
   #endif
 
-  #ifdef CALIBRATION_MEASURE_FRONT
+  #if ENABLED(CALIBRATION_MEASURE_FRONT)
     probe_side(m, uncertainty, FRONT, probe_top_at_edge);
   #endif
 
-  #ifdef CALIBRATION_MEASURE_LEFT
+  #if ENABLED(CALIBRATION_MEASURE_LEFT)
     probe_side(m, uncertainty, LEFT,  probe_top_at_edge);
   #endif
-  #ifdef CALIBRATION_MEASURE_BACK
+  #if ENABLED(CALIBRATION_MEASURE_BACK)
     probe_side(m, uncertainty, BACK,  probe_top_at_edge);
   #endif
 
@@ -313,7 +338,9 @@ inline void probe_sides(measurements_t &m, const float uncertainty) {
 #if ENABLED(CALIBRATION_REPORTING)
   inline void report_measured_faces(const measurements_t &m) {
     SERIAL_ECHOLNPGM("Sides:");
-    SERIAL_ECHOLNPAIR("  Top: ", m.obj_side[TOP]);
+    #if AXIS_CAN_CALIBRATE(Z)
+      SERIAL_ECHOLNPAIR("  Top: ", m.obj_side[TOP]);
+    #endif
     #if ENABLED(CALIBRATION_MEASURE_LEFT)
       SERIAL_ECHOLNPAIR("  Left: ", m.obj_side[LEFT]);
     #endif
@@ -343,19 +370,25 @@ inline void probe_sides(measurements_t &m, const float uncertainty) {
 
   inline void report_measured_backlash(const measurements_t &m) {
     SERIAL_ECHOLNPGM("Backlash:");
-    #if ENABLED(CALIBRATION_MEASURE_LEFT)
-      SERIAL_ECHOLNPAIR("  Left: ", m.backlash[LEFT]);
+    #if AXIS_CAN_CALIBRATE(X)
+      #if ENABLED(CALIBRATION_MEASURE_LEFT)
+        SERIAL_ECHOLNPAIR("  Left: ", m.backlash[LEFT]);
+      #endif
+      #if ENABLED(CALIBRATION_MEASURE_RIGHT)
+        SERIAL_ECHOLNPAIR("  Right: ", m.backlash[RIGHT]);
+      #endif
     #endif
-    #if ENABLED(CALIBRATION_MEASURE_RIGHT)
-      SERIAL_ECHOLNPAIR("  Right: ", m.backlash[RIGHT]);
+    #if AXIS_CAN_CALIBRATE(Y)
+      #if ENABLED(CALIBRATION_MEASURE_FRONT)
+        SERIAL_ECHOLNPAIR("  Front: ", m.backlash[FRONT]);
+      #endif
+      #if ENABLED(CALIBRATION_MEASURE_BACK)
+        SERIAL_ECHOLNPAIR("  Back: ", m.backlash[BACK]);
+      #endif
     #endif
-    #if ENABLED(CALIBRATION_MEASURE_FRONT)
-      SERIAL_ECHOLNPAIR("  Front: ", m.backlash[FRONT]);
+    #if AXIS_CAN_CALIBRATE(Z)
+      SERIAL_ECHOLNPAIR("  Top: ", m.backlash[TOP]);
     #endif
-    #if ENABLED(CALIBRATION_MEASURE_BACK)
-      SERIAL_ECHOLNPAIR("  Back: ", m.backlash[BACK]);
-    #endif
-    SERIAL_ECHOLNPAIR("  Top: ", m.backlash[TOP]);
     SERIAL_EOL();
   }
 
@@ -369,7 +402,7 @@ inline void probe_sides(measurements_t &m, const float uncertainty) {
     #if HAS_Y_CENTER
       SERIAL_ECHOLNPAIR_P(SP_Y_STR, m.pos_error.y);
     #endif
-    SERIAL_ECHOLNPAIR_P(SP_Z_STR, m.pos_error.z);
+    if (AXIS_CAN_CALIBRATE(Z)) SERIAL_ECHOLNPAIR_P(SP_Z_STR, m.pos_error.z);
     SERIAL_EOL();
   }
 
@@ -417,6 +450,7 @@ inline void calibrate_backlash(measurements_t &m, const float uncertainty) {
     probe_sides(m, uncertainty);
 
     #if ENABLED(BACKLASH_GCODE)
+
       #if HAS_X_CENTER
         backlash.distance_mm.x = (m.backlash[LEFT] + m.backlash[RIGHT]) / 2;
       #elif ENABLED(CALIBRATION_MEASURE_LEFT)
@@ -433,18 +467,18 @@ inline void calibrate_backlash(measurements_t &m, const float uncertainty) {
         backlash.distance_mm.y = m.backlash[BACK];
       #endif
 
-      backlash.distance_mm.z = m.backlash[TOP];
+      if (AXIS_CAN_CALIBRATE(Z)) backlash.distance_mm.z = m.backlash[TOP];
     #endif
   }
 
   #if ENABLED(BACKLASH_GCODE)
     // Turn on backlash compensation and move in all
-    // directions to take up any backlash
+    // allowed directions to take up any backlash
     {
       // New scope for TEMPORARY_BACKLASH_CORRECTION
       TEMPORARY_BACKLASH_CORRECTION(all_on);
       TEMPORARY_BACKLASH_SMOOTHING(0.0f);
-      const xyz_float_t move = { 3, 3, 3 };
+      const xyz_float_t move = { AXIS_CAN_CALIBRATE(X) * 3, AXIS_CAN_CALIBRATE(Y) * 3, AXIS_CAN_CALIBRATE(Z) * 3 };
       current_position += move; calibration_move();
       current_position -= move; calibration_move();
     }
@@ -482,26 +516,18 @@ inline void calibrate_toolhead(measurements_t &m, const float uncertainty, const
 
   // Adjust the hotend offset
   #if HAS_HOTEND_OFFSET
-    #if HAS_X_CENTER
-      hotend_offset[extruder].x += m.pos_error.x;
-    #endif
-    #if HAS_Y_CENTER
-      hotend_offset[extruder].y += m.pos_error.y;
-    #endif
-    hotend_offset[extruder].z += m.pos_error.z;
+    if (ENABLED(HAS_X_CENTER) && AXIS_CAN_CALIBRATE(X)) hotend_offset[extruder].x += m.pos_error.x;
+    if (ENABLED(HAS_Y_CENTER) && AXIS_CAN_CALIBRATE(Y)) hotend_offset[extruder].y += m.pos_error.y;
+                             if (AXIS_CAN_CALIBRATE(Z)) hotend_offset[extruder].z += m.pos_error.z;
     normalize_hotend_offsets();
   #endif
 
   // Correct for positional error, so the object
   // is at the known actual spot
   planner.synchronize();
-  #if HAS_X_CENTER
-    update_measurements(m, X_AXIS);
-  #endif
-  #if HAS_Y_CENTER
-    update_measurements(m, Y_AXIS);
-  #endif
-  update_measurements(m, Z_AXIS);
+  if (ENABLED(HAS_X_CENTER) && AXIS_CAN_CALIBRATE(X)) update_measurements(m, X_AXIS);
+  if (ENABLED(HAS_Y_CENTER) && AXIS_CAN_CALIBRATE(Y)) update_measurements(m, Y_AXIS);
+                           if (AXIS_CAN_CALIBRATE(Z)) update_measurements(m, Z_AXIS);
 
   sync_plan_position();
 }

Marlin/src/gcode/calibrate/M425.cpp

@@ -47,7 +47,7 @@ void GcodeSuite::M425() {
   bool noArgs = true;
 
   LOOP_XYZ(a) {
-    if (parser.seen(XYZ_CHAR(a))) {
+    if (CAN_CALIBRATE(a) && parser.seen(XYZ_CHAR(a))) {
       planner.synchronize();
       backlash.distance_mm[a] = parser.has_value() ? parser.value_linear_units() : backlash.get_measurement(AxisEnum(a));
       noArgs = false;
@@ -74,7 +74,7 @@ void GcodeSuite::M425() {
     SERIAL_ECHOLNPGM("active:");
     SERIAL_ECHOLNPAIR("  Correction Amount/Fade-out:     F", backlash.get_correction(), " (F1.0 = full, F0.0 = none)");
     SERIAL_ECHOPGM("  Backlash Distance (mm):        ");
-    LOOP_XYZ(a) {
+    LOOP_XYZ(a) if (CAN_CALIBRATE(a)) {
       SERIAL_CHAR(' ', XYZ_CHAR(a));
       SERIAL_ECHO(backlash.distance_mm[a]);
       SERIAL_EOL();
@@ -87,7 +87,7 @@ void GcodeSuite::M425() {
     #if ENABLED(MEASURE_BACKLASH_WHEN_PROBING)
       SERIAL_ECHOPGM("  Average measured backlash (mm):");
       if (backlash.has_any_measurement()) {
-        LOOP_XYZ(a) if (backlash.has_measurement(AxisEnum(a))) {
+        LOOP_XYZ(a) if (CAN_CALIBRATE(a) && backlash.has_measurement(AxisEnum(a))) {
           SERIAL_CHAR(' ', XYZ_CHAR(a));
           SERIAL_ECHO(backlash.get_measurement(AxisEnum(a)));
         }

Marlin/src/gcode/config/M220.cpp

@@ -30,7 +30,7 @@
  *   S<percent> : Set the feed rate percentage factor
  *
  * Report the current speed percentage factor if no parameter is specified
- * 
+ *
  * With PRUSA_MMU2...
  *   B : Flag to back up the current factor
  *   R : Flag to restore the last-saved factor

Marlin/src/gcode/config/M43.cpp

@@ -67,6 +67,11 @@ inline void toggle_pins() {
     else {
       watchdog_refresh();
       report_pin_state_extended(pin, ignore_protection, true, PSTR("Pulsing   "));
+      #ifdef __STM32F1__
+        const auto prior_mode = _GET_MODE(i);
+      #else
+        const bool prior_mode = GET_PINMODE(pin);
+      #endif
       #if AVR_AT90USB1286_FAMILY // Teensy IDEs don't know about these pins so must use FASTIO
         if (pin == TEENSY_E2) {
           SET_OUTPUT(TEENSY_E2);
@@ -95,6 +100,11 @@ inline void toggle_pins() {
           watchdog_refresh();
         }
       }
+      #ifdef __STM32F1__
+        _SET_MODE(i, prior_mode);
+      #else
+        pinMode(pin, prior_mode);
+      #endif
     }
     SERIAL_EOL();
   }

Marlin/src/gcode/control/M42.cpp

@@ -37,16 +37,33 @@
  *
  *  S<byte> Pin status from 0 - 255
  *  I       Flag to ignore Marlin's pin protection
+ *
+ *  M<mode> Pin mode: 0=INPUT  1=OUTPUT  2=INPUT_PULLUP  3=INPUT_PULLDOWN
  */
 void GcodeSuite::M42() {
-  if (!parser.seenval('S')) return;
-  const byte pin_status = parser.value_byte();
-
   const int pin_index = PARSED_PIN_INDEX('P', GET_PIN_MAP_INDEX(LED_PIN));
   if (pin_index < 0) return;
 
   const pin_t pin = GET_PIN_MAP_PIN(pin_index);
 
+  if (!parser.boolval('I') && pin_is_protected(pin)) return protected_pin_err();
+
+  if (parser.seenval('M')) {
+    switch (parser.value_byte()) {
+      case 0: pinMode(pin, INPUT); break;
+      case 1: pinMode(pin, OUTPUT); break;
+      case 2: pinMode(pin, INPUT_PULLUP); break;
+      #ifdef INPUT_PULLDOWN
+        case 3: pinMode(pin, INPUT_PULLDOWN); break;
+      #endif
+      default: SERIAL_ECHOLNPGM("Invalid Pin Mode");
+    }
+    return;
+  }
+
+  if (!parser.seenval('S')) return;
+  const byte pin_status = parser.value_byte();
+
   #if FAN_COUNT > 0
     switch (pin) {
       #if HAS_FAN0
@@ -76,8 +93,6 @@ void GcodeSuite::M42() {
     }
   #endif
 
-  if (!parser.boolval('I') && pin_is_protected(pin)) return protected_pin_err();
-
   pinMode(pin, OUTPUT);
   extDigitalWrite(pin, pin_status);
   analogWrite(pin, pin_status);

Marlin/src/gcode/control/M999.cpp

@@ -23,7 +23,7 @@
 #include "../gcode.h"
 
 #include "../../lcd/ultralcd.h" // for lcd_reset_alert_level
-#include "../../MarlinCore.h"   // for Running
+#include "../../MarlinCore.h"   // for marlin_state
 #include "../queue.h"           // for flush_and_request_resend
 
 /**
@@ -37,7 +37,7 @@
  *
  */
 void GcodeSuite::M999() {
-  Running = true;
+  marlin_state = MF_RUNNING;
   ui.reset_alert_level();
 
   if (parser.boolval('S')) return;

Marlin/src/gcode/feature/advance/M900.cpp

@@ -42,7 +42,7 @@
  */
 void GcodeSuite::M900() {
 
-  auto echo_value_oor = [] (const char ltr, const bool ten=true) {
+  auto echo_value_oor = [](const char ltr, const bool ten=true) {
     SERIAL_CHAR('?'); SERIAL_CHAR(ltr);
     SERIAL_ECHOPGM(" value out of range");
     if (ten) SERIAL_ECHOPGM(" (0-10)");

Marlin/src/gcode/feature/camera/M240.cpp

@@ -48,14 +48,8 @@
 
   #ifdef PHOTO_RETRACT_MM
     inline void e_move_m240(const float length, const feedRate_t &fr_mm_s) {
-      if (length && thermalManager.hotEnoughToExtrude(active_extruder)) {
-        #if ENABLED(ADVANCED_PAUSE_FEATURE)
-          do_pause_e_move(length, fr_mm_s);
-        #else
-          current_position.e += length / planner.e_factor[active_extruder];
-          line_to_current_position(fr_mm_s);
-        #endif
-      }
+      if (length && thermalManager.hotEnoughToExtrude(active_extruder))
+        unscaled_e_move(length, fr_mm_s);
     }
   #endif
 

Marlin/src/gcode/feature/controllerfan/M710.cpp

@@ -0,0 +1,81 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "../../../inc/MarlinConfigPre.h"
+
+#if ENABLED(CONTROLLER_FAN_EDITABLE)
+
+#include "../../gcode.h"
+#include "../../../feature/controllerfan.h"
+
+void M710_report(const bool forReplay) {
+  if (!forReplay) { SERIAL_ECHOLNPGM("; Controller Fan"); SERIAL_ECHO_START(); }
+  SERIAL_ECHOLNPAIR("M710 "
+    "S", int(controllerFan.settings.active_speed),
+    "I", int(controllerFan.settings.idle_speed),
+    "A", int(controllerFan.settings.auto_mode),
+    "D", controllerFan.settings.duration,
+    " ; (", (int(controllerFan.settings.active_speed) * 100) / 255, "%"
+    " ", (int(controllerFan.settings.idle_speed) * 100) / 255, "%)"
+  );
+}
+
+/**
+ * M710: Set controller fan settings
+ *
+ *  R         : Reset to defaults
+ *  S[0-255]  : Fan speed when motors are active
+ *  I[0-255]  : Fan speed when motors are idle
+ *  A[0|1]    : Turn auto mode on or off
+ *  D         : Set auto mode idle duration
+ *
+ * Examples:
+ *   M710                   ; Report current Settings
+ *   M710 R                 ; Reset SIAD to defaults
+ *   M710 I64               ; Set controller fan Idle Speed to 25%
+ *   M710 S255              ; Set controller fan Active Speed to 100%
+ *   M710 S0                ; Set controller fan Active Speed to OFF
+ *   M710 I255 A0           ; Set controller fan Idle Speed to 100% with Auto Mode OFF
+ *   M710 I127 A1 S255 D160 ; Set controller fan idle speed 50%, AutoMode On, Fan speed 100%, duration to 160 Secs
+ */
+void GcodeSuite::M710() {
+
+  const bool seenR = parser.seen('R');
+  if (seenR) controllerFan.reset();
+
+  const bool seenS = parser.seenval('S');
+  if (seenS) controllerFan.settings.active_speed = parser.value_byte();
+
+  const bool seenI = parser.seenval('I');
+  if (seenI) controllerFan.settings.idle_speed = parser.value_byte();
+
+  const bool seenA = parser.seenval('A');
+  if (seenA) controllerFan.settings.auto_mode = parser.value_bool();
+
+  const bool seenD = parser.seenval('D');
+  if (seenD) controllerFan.settings.duration = parser.value_ushort();
+
+  if (!(seenR || seenS || seenI || seenA || seenD))
+    M710_report(false);
+}
+
+#endif // CONTROLLER_FAN_EDITABLE

Marlin/src/gcode/feature/powerloss/M1000.cpp

@@ -63,7 +63,7 @@ void GcodeSuite::M1000() {
       #if HAS_LCD_MENU
         ui.goto_screen(menu_job_recovery);
       #elif ENABLED(EXTENSIBLE_UI)
-        ExtUI::OnPowerLossResume();
+        ExtUI::onPowerLossResume();
       #else
         SERIAL_ECHO_MSG("Resume requires LCD.");
       #endif

Marlin/src/gcode/gcode.cpp

@@ -752,6 +752,10 @@ void GcodeSuite::process_parsed_command(const bool no_ok/*=false*/) {
         case 702: M702(); break;                                  // M702: Unload Filament
       #endif
 
+      #if ENABLED(CONTROLLER_FAN_EDITABLE)
+        case 710: M710(); break;                                  // M710: Set Controller Fan settings
+      #endif
+
       #if ENABLED(GCODE_MACROS)
         case 810: case 811: case 812: case 813: case 814:
         case 815: case 816: case 817: case 818: case 819:
@@ -853,7 +857,11 @@ void GcodeSuite::process_parsed_command(const bool no_ok/*=false*/) {
 
       #if ENABLED(POWER_LOSS_RECOVERY)
         case 413: M413(); break;                                  // M413: Enable/disable/query Power-Loss Recovery
-        case 1000: M1000(); break;                                // M1000: Resume from power-loss
+        case 1000: M1000(); break;                                // M1000: [INTERNAL] Resume from power-loss
+      #endif
+
+      #if ENABLED(SDSUPPORT)
+        case 1001: M1001(); break;                                // M1001: [INTERNAL] Handle SD completion
       #endif
 
       #if ENABLED(MAX7219_GCODE)

Marlin/src/gcode/gcode.h

@@ -968,10 +968,18 @@ private:
     static void M1000();
   #endif
 
+  #if ENABLED(SDSUPPORT)
+    static void M1001();
+  #endif
+
   #if ENABLED(MAX7219_GCODE)
     static void M7219();
   #endif
 
+  #if ENABLED(CONTROLLER_FAN_EDITABLE)
+    static void M710();
+  #endif
+
   static void T(const uint8_t tool_index);
 
 };

Marlin/src/gcode/lcd/M0_M1.cpp

@@ -24,23 +24,19 @@
 
 #if HAS_RESUME_CONTINUE
 
-#include "../gcode.h"
-#include "../../module/planner.h"
-
 #include "../../inc/MarlinConfig.h"
 
+#include "../gcode.h"
+
+#include "../../module/planner.h" // for synchronize()
+#include "../../MarlinCore.h"     // for wait_for_user_response()
+
 #if HAS_LCD_MENU
   #include "../../lcd/ultralcd.h"
-#endif
-
-#if ENABLED(EXTENSIBLE_UI)
+#elif ENABLED(EXTENSIBLE_UI)
   #include "../../lcd/extui/ui_api.h"
 #endif
 
-#if HAS_LEDS_OFF_FLAG
-  #include "../../feature/leds/printer_event_leds.h"
-#endif
-
 #if ENABLED(HOST_PROMPT_SUPPORT)
   #include "../../feature/host_actions.h"
 #endif
@@ -56,16 +52,11 @@ void GcodeSuite::M0_M1() {
 
   planner.synchronize();
 
-  const bool seenQ = parser.seen('Q');
-  #if HAS_LEDS_OFF_FLAG
-    if (seenQ) printerEventLEDs.onPrintCompleted();      // Change LED color for Print Completed
-  #endif
-
   #if HAS_LCD_MENU
 
     if (parser.string_arg)
       ui.set_status(parser.string_arg, true);
-    else if (!seenQ) {
+    else {
       LCD_MESSAGEPGM(MSG_USERWAIT);
       #if ENABLED(LCD_PROGRESS_BAR) && PROGRESS_MSG_EXPIRE > 0
         ui.reset_progress_bar_timeout();
@@ -73,12 +64,10 @@ void GcodeSuite::M0_M1() {
     }
 
   #elif ENABLED(EXTENSIBLE_UI)
-
     if (parser.string_arg)
       ExtUI::onUserConfirmRequired(parser.string_arg); // Can this take an SRAM string??
     else
       ExtUI::onUserConfirmRequired_P(GET_TEXT(MSG_USERWAIT));
-
   #else
 
     if (parser.string_arg) {
@@ -88,25 +77,15 @@ void GcodeSuite::M0_M1() {
 
   #endif
 
-  KEEPALIVE_STATE(PAUSED_FOR_USER);
-  wait_for_user = true;
-
   #if ENABLED(HOST_PROMPT_SUPPORT)
     host_prompt_do(PROMPT_USER_CONTINUE, parser.codenum ? PSTR("M1 Stop") : PSTR("M0 Stop"), CONTINUE_STR);
   #endif
 
-  if (ms > 0) ms += millis();  // wait until this time for a click
-  while (wait_for_user && (ms == 0 || PENDING(millis(), ms))) idle();
-
-  #if HAS_LEDS_OFF_FLAG
-    printerEventLEDs.onResumeAfterWait();
-  #endif
+  wait_for_user_response(ms);
 
   #if HAS_LCD_MENU
-    if (!seenQ) ui.reset_status();
+    ui.reset_status();
   #endif
-
-  wait_for_user = false;
 }
 
 #endif // HAS_RESUME_CONTINUE

Marlin/src/gcode/motion/G2_G3.cpp

@@ -236,7 +236,7 @@ void plan_arc(
     planner.apply_leveling(raw);
   #endif
 
-  planner.buffer_line(raw, scaled_fr_mm_s, active_extruder, seg_length
+  planner.buffer_line(raw, scaled_fr_mm_s, active_extruder, 0
     #if ENABLED(SCARA_FEEDRATE_SCALING)
       , inv_duration
     #endif

Marlin/src/gcode/sd/M1001.cpp

@@ -0,0 +1,109 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(SDSUPPORT)
+
+#include "../gcode.h"
+#include "../../module/printcounter.h"
+
+#if EITHER(LCD_SET_PROGRESS_MANUALLY, SD_REPRINT_LAST_SELECTED_FILE)
+  #include "../../lcd/ultralcd.h"
+#endif
+
+#if ENABLED(POWER_LOSS_RECOVERY)
+  #include "../../feature/powerloss.h"
+#endif
+
+#if HAS_LEDS_OFF_FLAG
+  #include "../../feature/leds/printer_event_leds.h"
+#endif
+
+#if ENABLED(EXTENSIBLE_UI)
+  #include "../../lcd/extui/ui_api.h"
+#endif
+
+#if ENABLED(HOST_ACTION_COMMANDS)
+  #include "../../feature/host_actions.h"
+#endif
+
+#if ENABLED(SD_FINISHED_STEPPERRELEASE) && defined(SD_FINISHED_RELEASECOMMAND)
+  #include "../../module/planner.h"
+#endif
+
+#ifndef PE_LEDS_COMPLETED_TIME
+  #define PE_LEDS_COMPLETED_TIME (30*60)
+#endif
+
+/**
+ * M1001: Execute actions for SD print completion
+ */
+void GcodeSuite::M1001() {
+
+  // Report total print time
+  const bool long_print = print_job_timer.duration() > 60;
+  if (long_print) gcode.process_subcommands_now_P(PSTR("M31"));
+
+  // Stop the print job timer
+  gcode.process_subcommands_now_P(PSTR("M77"));
+
+  // Set the progress bar "done" state
+  #if ENABLED(LCD_SET_PROGRESS_MANUALLY)
+    ui.set_progress_done();
+  #endif
+
+  // Purge the recovery file
+  #if ENABLED(POWER_LOSS_RECOVERY)
+    recovery.purge();
+  #endif
+
+  // Announce SD file completion
+  SERIAL_ECHOLNPGM(STR_FILE_PRINTED);
+
+  // Update the status LED color
+  #if HAS_LEDS_OFF_FLAG
+    if (long_print) {
+      printerEventLEDs.onPrintCompleted();
+      #if ENABLED(EXTENSIBLE_UI)
+        ExtUI::onUserConfirmRequired_P(GET_TEXT(MSG_PRINT_DONE));
+      #endif
+      #if ENABLED(HOST_PROMPT_SUPPORT)
+        host_prompt_do(PROMPT_USER_CONTINUE, GET_TEXT(MSG_PRINT_DONE), CONTINUE_STR);
+      #endif
+      wait_for_user_response(1000UL * TERN(HAS_LCD_MENU, PE_LEDS_COMPLETED_TIME, 30));
+      printerEventLEDs.onResumeAfterWait();
+    }
+  #endif
+
+  // Wait for the queue to empty (and "clean"), inject SD_FINISHED_RELEASECOMMAND
+  #if ENABLED(SD_FINISHED_STEPPERRELEASE) && defined(SD_FINISHED_RELEASECOMMAND)
+    planner.finish_and_disable();
+  #endif
+
+  // Re-select the last printed file in the UI
+  #if ENABLED(SD_REPRINT_LAST_SELECTED_FILE)
+    ui.reselect_last_file();
+  #endif
+}
+
+#endif // SDSUPPORT

Marlin/src/gcode/temp/M303.cpp

@@ -34,12 +34,31 @@
 /**
  * M303: PID relay autotune
  *
- *       S<temperature> sets the target temperature. (default 150C / 70C)
- *       E<extruder> (-1 for the bed) (default 0)
- *       C<cycles> Minimum 3. Default 5.
- *       U<bool> with a non-zero value will apply the result to current settings
+ *  S<temperature>  Set the target temperature. (Default: 150C / 70C)
+ *  E<extruder>     Extruder number to tune, or -1 for the bed. (Default: E0)
+ *  C<cycles>       Number of times to repeat the procedure. (Minimum: 3, Default: 5)
+ *  U<bool>         Flag to apply the result to the current PID values
+ *
+ * With PID_DEBUG:
+ *  D               Toggle PID debugging and EXIT without further action.
  */
+
+#if ENABLED(PID_DEBUG)
+  bool pid_debug_flag = 0;
+#endif
+
 void GcodeSuite::M303() {
+
+  #if ENABLED(PID_DEBUG)
+    if (parser.seen('D')) {
+      pid_debug_flag = !pid_debug_flag;
+      SERIAL_ECHO_START();
+      SERIAL_ECHOPGM("PID Debug ");
+      serialprintln_onoff(pid_debug_flag);
+      return;
+    }
+  #endif
+
   #if ENABLED(PIDTEMPBED)
     #define SI H_BED
   #else
@@ -54,7 +73,7 @@ void GcodeSuite::M303() {
   if (!WITHIN(e, SI, EI)) {
     SERIAL_ECHOLNPGM(STR_PID_BAD_EXTRUDER_NUM);
     #if ENABLED(EXTENSIBLE_UI)
-      ExtUI::OnPidTuning(ExtUI::result_t::PID_BAD_EXTRUDER_NUM);
+      ExtUI::onPidTuning(ExtUI::result_t::PID_BAD_EXTRUDER_NUM);
     #endif
     return;
   }

Marlin/src/inc/Conditionals_LCD.h

@@ -683,6 +683,10 @@
   #define SPI_SPEED SPI_FULL_SPEED
 #endif
 
+#if SERIAL_PORT == -1 || SERIAL_PORT_2 == -1
+  #define HAS_USB_SERIAL 1
+#endif
+
 /**
  * This setting is also used by M109 when trying to calculate
  * a ballpark safe margin to prevent wait-forever situation.

Marlin/src/inc/Conditionals_adv.h

@@ -93,7 +93,7 @@
 #if EITHER(MIN_SOFTWARE_ENDSTOPS, MAX_SOFTWARE_ENDSTOPS)
   #define HAS_SOFTWARE_ENDSTOPS 1
 #endif
-#if ANY(EXTENSIBLE_UI, NEWPANEL, EMERGENCY_PARSER)
+#if ANY(EXTENSIBLE_UI, NEWPANEL, EMERGENCY_PARSER, HAS_ADC_BUTTONS)
   #define HAS_RESUME_CONTINUE 1
 #endif
 

Marlin/src/inc/Conditionals_post.h

@@ -35,18 +35,19 @@
   #define HAS_LINEAR_E_JERK 1
 #endif
 
+// Determine which type of 'EEPROM' is in use
 #if ENABLED(EEPROM_SETTINGS)
-  #if NONE(FLASH_EEPROM_EMULATION, SRAM_EEPROM_EMULATION, SDCARD_EEPROM_EMULATION) && EITHER(I2C_EEPROM, SPI_EEPROM)
-    #define USE_REAL_EEPROM 1
+  // EEPROM type may be defined by compile flags, configs, HALs, or pins
+  // Set additional flags to let HALs choose in their Conditionals_post.h
+  #if NONE(FLASH_EEPROM_EMULATION, SRAM_EEPROM_EMULATION, SDCARD_EEPROM_EMULATION) && ANY(I2C_EEPROM, SPI_EEPROM, QSPI_EEPROM)
+    #define USE_WIRED_EEPROM    1
   #else
-    #define USE_EMULATED_EEPROM 1
-  #endif
-  #if NONE(USE_REAL_EEPROM, FLASH_EEPROM_EMULATION, SRAM_EEPROM_EMULATION)
-    #define SDCARD_EEPROM_EMULATION 1
+    #define USE_FALLBACK_EEPROM 1
   #endif
 #else
   #undef I2C_EEPROM
   #undef SPI_EEPROM
+  #undef QSPI_EEPROM
   #undef SDCARD_EEPROM_EMULATION
   #undef SRAM_EEPROM_EMULATION
   #undef FLASH_EEPROM_EMULATION
@@ -138,6 +139,19 @@
   #define CORESIGN(n) (ANY(COREYX, COREZX, COREZY) ? (-(n)) : (n))
 #endif
 
+// Calibration codes only for non-core axes
+#if EITHER(BACKLASH_GCODE, CALIBRATION_GCODE)
+  #if IS_CORE
+    #define X_AXIS_INDEX 0
+    #define Y_AXIS_INDEX 1
+    #define Z_AXIS_INDEX 2
+    #define CAN_CALIBRATE(A,B) (A##_AXIS_INDEX == B##_INDEX)
+  #else
+    #define CAN_CALIBRATE(...) 1
+  #endif
+#endif
+#define AXIS_CAN_CALIBRATE(A) CAN_CALIBRATE(A,NORMAL_AXIS)
+
 /**
  * No adjustable bed on non-cartesians
  */

Marlin/src/inc/MarlinConfig.h

@@ -35,11 +35,12 @@
 #include "Conditionals_post.h"
 #include HAL_PATH(../HAL, inc/Conditionals_post.h)
 
+#include "../core/types.h"  // Ahead of sanity-checks
+
 #include "SanityCheck.h"
 #include HAL_PATH(../HAL, inc/SanityCheck.h)
 
 // Include all core headers
-#include "../core/types.h"
 #include "../core/language.h"
 #include "../core/utility.h"
 #include "../core/serial.h"

Marlin/src/inc/MarlinConfigPre.h

@@ -37,12 +37,8 @@
 #include "../../Configuration.h"
 
 #ifdef CUSTOM_VERSION_FILE
-  #if defined(__has_include)
-    #if __has_include(XSTR(../../CUSTOM_VERSION_FILE))
-      #include XSTR(../../CUSTOM_VERSION_FILE)
-    #endif
-  #else
-    #include XSTR(../../CUSTOM_VERSION_FILE)
+  #if __has_include(STRINGIFY(../../CUSTOM_VERSION_FILE))
+    #include STRINGIFY(../../CUSTOM_VERSION_FILE)
   #endif
 #endif
 

Marlin/src/inc/SanityCheck.h

@@ -270,6 +270,10 @@
   #error "Replace SLED_PIN with SOL1_PIN (applies to both Z_PROBE_SLED and SOLENOID_PROBE)."
 #elif defined(CONTROLLERFAN_PIN)
   #error "CONTROLLERFAN_PIN is now CONTROLLER_FAN_PIN, enabled with USE_CONTROLLER_FAN. Please update your Configuration_adv.h."
+#elif defined(CONTROLLERFAN_SPEED)
+  #error "CONTROLLERFAN_SPEED is now CONTROLLERFAN_SPEED_ACTIVE. Please update your Configuration_adv.h."
+#elif defined(CONTROLLERFAN_SECS)
+  #error "CONTROLLERFAN_SECS is now CONTROLLERFAN_IDLE_TIME. Please update your Configuration_adv.h."
 #elif defined(MIN_RETRACT)
   #error "MIN_RETRACT is now MIN_AUTORETRACT and MAX_AUTORETRACT. Please update your Configuration_adv.h."
 #elif defined(ADVANCE)
@@ -1983,7 +1987,7 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
 /**
  * Auto Fan check for PWM pins
  */
-#if HAS_AUTO_FAN && EXTRUDER_AUTO_FAN_SPEED != 255
+#if HAS_AUTO_FAN && EXTRUDER_AUTO_FAN_SPEED != 255 && DISABLED(NO_COMPILE_TIME_PWM)
   #define AF_ERR_SUFF "_AUTO_FAN_PIN is not a PWM pin. Set EXTRUDER_AUTO_FAN_SPEED to 255."
   #if HAS_AUTO_FAN_0
     static_assert(PWM_PIN(E0_AUTO_FAN_PIN), "E0" AF_ERR_SUFF);
@@ -1993,9 +1997,24 @@ static_assert(Y_MAX_LENGTH >= Y_BED_SIZE, "Movement bounds (Y_MIN_POS, Y_MAX_POS
     static_assert(PWM_PIN(E2_AUTO_FAN_PIN), "E2" AF_ERR_SUFF);
   #elif HAS_AUTO_FAN_3
     static_assert(PWM_PIN(E3_AUTO_FAN_PIN), "E3" AF_ERR_SUFF);
+  #elif HAS_AUTO_FAN_4
+    static_assert(PWM_PIN(E4_AUTO_FAN_PIN), "E4" AF_ERR_SUFF);
+  #elif HAS_AUTO_FAN_5
+    static_assert(PWM_PIN(E5_AUTO_FAN_PIN), "E5" AF_ERR_SUFF);
+  #elif HAS_AUTO_FAN_6
+    static_assert(PWM_PIN(E6_AUTO_FAN_PIN), "E6" AF_ERR_SUFF);
+  #elif HAS_AUTO_FAN_7
+    static_assert(PWM_PIN(E7_AUTO_FAN_PIN), "E7" AF_ERR_SUFF);
   #endif
 #endif
 
+/**
+ * Make sure only one EEPROM type is enabled
+ */
+#if ENABLED(EEPROM_SETTINGS) && 1 < ENABLED(SDCARD_EEPROM_EMULATION) + ENABLED(FLASH_EEPROM_EMULATION) + ENABLED(SRAM_EEPROM_EMULATION)
+  #error "Please select only one of SDCARD, FLASH, or SRAM_EEPROM_EMULATION."
+#endif
+
 /**
  * Make sure only one display is enabled
  */
@@ -2634,14 +2653,14 @@ static_assert(   _ARR_TEST(3,0) && _ARR_TEST(3,1) && _ARR_TEST(3,2)
 #endif
 
 #if ENABLED(BACKLASH_COMPENSATION)
-  #if IS_CORE
-    #error "BACKLASH_COMPENSATION is incompatible with CORE kinematics."
-  #endif
   #ifndef BACKLASH_DISTANCE_MM
     #error "BACKLASH_COMPENSATION requires BACKLASH_DISTANCE_MM"
-  #endif
-  #ifndef BACKLASH_CORRECTION
+  #elif !defined(BACKLASH_CORRECTION)
     #error "BACKLASH_COMPENSATION requires BACKLASH_CORRECTION"
+  #elif IS_CORE
+    constexpr float backlash_arr[] = BACKLASH_DISTANCE_MM;
+    static_assert(!backlash_arr[CORE_AXIS_1] && !backlash_arr[CORE_AXIS_2],
+                  "BACKLASH_COMPENSATION can only apply to " STRINGIFY(NORMAL_AXIS) " with your CORE system.");
   #endif
 #endif
 

Marlin/src/inc/Version.h

@@ -25,7 +25,7 @@
  * Release version. Leave the Marlin version or apply a custom scheme.
  */
 #ifndef SHORT_BUILD_VERSION
-  #define SHORT_BUILD_VERSION "2.0.5"
+  #define SHORT_BUILD_VERSION "2.0.5.3"
 #endif
 
 /**
@@ -42,7 +42,7 @@
  * version was tagged.
  */
 #ifndef STRING_DISTRIBUTION_DATE
-  #define STRING_DISTRIBUTION_DATE "2020-03-14"
+  #define STRING_DISTRIBUTION_DATE "2020-03-31"
 #endif
 
 /**

Marlin/src/lcd/dogm/status_screen_DOGM.cpp

@@ -448,10 +448,10 @@ void MarlinUI::draw_status_screen() {
         #endif
       }
 
+      constexpr bool can_show_days = DISABLED(DOGM_SD_PERCENT) || ENABLED(ROTATE_PROGRESS_DISPLAY);
       if (ev != lastElapsed) {
         lastElapsed = ev;
-        const bool has_days = (elapsed.value >= 60*60*24L);
-        const uint8_t len = elapsed.toDigital(elapsed_string, has_days);
+        const uint8_t len = elapsed.toDigital(elapsed_string, can_show_days && elapsed.value >= 60*60*24L);
         elapsed_x_pos = _SD_INFO_X(len);
 
         #if ENABLED(SHOW_REMAINING_TIME)
@@ -468,8 +468,7 @@ void MarlinUI::draw_status_screen() {
             }
             else {
               duration_t estimation = timeval;
-              const bool has_days = (estimation.value >= 60*60*24L);
-              const uint8_t len = estimation.toDigital(estimation_string, has_days);
+              const uint8_t len = estimation.toDigital(estimation_string, can_show_days && estimation.value >= 60*60*24L);
               estimation_x_pos = _SD_INFO_X(len
                 #if !BOTH(DOGM_SD_PERCENT, ROTATE_PROGRESS_DISPLAY)
                   + 1