Merge remote-tracking branch 'upstream/dev' into dev

Documentation/changelog.md

+### Version 4.2.81
+* Fix serial protocol for Repetier Host
+* Bug fix
+
 ### Version 4.2.8
 * Add board folder with files of various board containing the pins
 * Add End time on Graphics display when SD print

MK/Configuration_Basic.h

@@ -9,7 +9,6 @@
  * - Extruders number
  * - Thermistor type
  * - Temperature limits
- * - UI Language
  *
  * Mechanisms-settings can be found in Configuration_Xxxxxx.h (where Xxxxxx can be: Cartesian - Delta - Core - Scara)
  * Feature-settings can be found in Configuration_Feature.h
@@ -244,34 +243,4 @@
 #define GUM_PREHEAT_FAN_SPEED   255   // Insert Value between 0 and 255
 /*****************************************************************************************************/
 
-
-/***********************************************************************
- *************************** UI Language  ******************************
- ***********************************************************************
- *                                                                     *
- * Select the language that you prefer and change LANGUAGE_CHOICE      *
- *                                                                     *
- * 1  English                                                          *
- * 2  Polish                                                           *
- * 3  French                                                           *
- * 4  German                                                           *
- * 5  Spanish                                                          *
- * 6  Russian                                                          *
- * 7  Italian                                                          *
- * 8  Portuguese                                                       *
- * 9  Finnish                                                          *
- * 10 Aragonese                                                        *
- * 11 Dutch                                                            *
- * 12 Danish                                                           *
- * 13 Catalan                                                          *
- * 14 Basque-Euskera                                                   *
- * 15 Portuguese (Brazil)                                              *
- * 16 Bulgarian                                                        *
- * 17 Japanese                                                         *
- * 18 Japanese utf                                                     *
- * 19 Chinese                                                          *
- *                                                                     *
- ***********************************************************************/
-#define LANGUAGE_CHOICE 1
-/***********************************************************************/
 #endif

MK/Configuration_Delta.h

@@ -142,9 +142,6 @@
 // Precision for G30 delta autocalibration function
 #define AUTOCALIBRATION_PRECISION 0.1 // mm
 
-// Precision probe. Number of probe for the mean
-#define PROBE_COUNT 3
-
 // Z-Probe variables
 // Offsets to the probe relative to the extruder tip (Hotend - Probe)
 // X and Y offsets MUST be INTEGERS
@@ -163,13 +160,13 @@
 #define Z_PROBE_OFFSET_FROM_EXTRUDER -1     // Z offset: -below [of the nozzle] (always negative!)
 
 // Start and end location values are used to deploy/retract the probe (will move from start to end and back again)
-#define Z_PROBE_DEPLOY_START_LOCATION {0, 0, 20}   // X, Y, Z, E start location for z-probe deployment sequence
-#define Z_PROBE_DEPLOY_END_LOCATION {0, 0, 20}     // X, Y, Z, E end location for z-probe deployment sequence
-#define Z_PROBE_RETRACT_START_LOCATION {0, 0, 20}  // X, Y, Z, E start location for z-probe retract sequence
-#define Z_PROBE_RETRACT_END_LOCATION {0, 0, 20}    // X, Y, Z, E end location for z-probe retract sequence
+#define Z_PROBE_DEPLOY_START_LOCATION {0, 0, 30}   // X, Y, Z, E start location for z-probe deployment sequence
+#define Z_PROBE_DEPLOY_END_LOCATION {0, 0, 30}     // X, Y, Z, E end location for z-probe deployment sequence
+#define Z_PROBE_RETRACT_START_LOCATION {0, 0, 30}  // X, Y, Z, E start location for z-probe retract sequence
+#define Z_PROBE_RETRACT_END_LOCATION {0, 0, 30}    // X, Y, Z, E end location for z-probe retract sequence
 
 // How much the nozzle will be raised when travelling from between next probing points
-#define Z_RAISE_BETWEEN_PROBINGS 5
+#define Z_RAISE_BETWEEN_PROBINGS 30
 
 // Define the grid for bed level AUTO BED LEVELING GRID POINTS X AUTO BED LEVELING GRID POINTS.
 #define AUTO_BED_LEVELING_GRID_POINTS 9

MK/Configuration_Feature.h

@@ -53,6 +53,7 @@
  * ADDON FEATURES:
  * - EEPROM
  * - SDCARD
+ * - LCD Language
  * - LCD
  * - Canon RC-1 Remote
  * - Camera trigger
@@ -310,13 +311,21 @@
 #define THERMAL_PROTECTION_PERIOD    40     // Seconds
 #define THERMAL_PROTECTION_HYSTERESIS 4     // Degrees Celsius
 
-// Whenever an M104 or M109 increases the target temperature the firmware will wait for the
-// WATCH TEMP PERIOD to expire, and if the temperature hasn't increased by WATCH TEMP INCREASE
-// degrees, the machine is halted, requiring a hard reset. This test restarts with any M104/M109,
-//but only if the current temperature is far enough below the target for a reliable test.
-#define WATCH_TEMP_PERIOD  16               // Seconds
-#define WATCH_TEMP_INCREASE 4               // Degrees Celsius
+/**
+ * Whenever an M104 or M109 increases the target temperature the firmware will wait for the
+ * WATCH TEMP PERIOD to expire, and if the temperature hasn't increased by WATCH TEMP INCREASE
+ * degrees, the machine is halted, requiring a hard reset. This test restarts with any M104/M109,
+ * but only if the current temperature is far enough below the target for a reliable test.
+ *
+ * If you get false positives for "Heating failed" increase WATCH TEMP PERIOD and/or decrease WATCH TEMP INCREASE
+ * WATCH TEMP INCREASE should not be below 2.
+ */
+#define WATCH_TEMP_PERIOD  20               // Seconds
+#define WATCH_TEMP_INCREASE 2               // Degrees Celsius
 
+/**
+ * Thermal Protection parameters for the bed are just as above for hotends.
+ */
 //#define THERMAL_PROTECTION_BED 
 
 #define THERMAL_PROTECTION_BED_PERIOD    20 // Seconds
@@ -325,7 +334,7 @@
 
 //#define THERMAL_PROTECTION_COOLER
 
-#define THERMAL_PROTECTION_BED_COOLER    30 // Seconds
+#define THERMAL_PROTECTION_COOLER_PERIOD    30 // Seconds
 #define THERMAL_PROTECTION_COOLER_HYSTERESIS 3 // Degree Celsius
 
 // Using M141 to set cooling temperature the firmware will wait for the WATCH_COOLER_TEMP_PERIOD 
@@ -338,8 +347,17 @@
 #define WATCH_TEMP_COOLER_PERIOD 60          // Seconds
 #define WATCH_TEMP_COOLER_DECREASE 1         // Degree Celsius
 
-
-
+/**
+ * Whenever an M140 or M190 increases the target temperature the firmware will wait for the
+ * WATCH BED TEMP PERIOD to expire, and if the temperature hasn't increased by WATCH BED TEMP INCREASE
+ * degrees, the machine is halted, requiring a hard reset. This test restarts with any M140/M190,
+ * but only if the current temperature is far enough below the target for a reliable test.
+ *
+ * If you get too many "Heating failed" errors, increase WATCH BED TEMP PERIOD and/or decrease
+ * WATCH BED TEMP INCREASE. (WATCH BED TEMP INCREASE should not be below 2.)
+ */
+#define WATCH_BED_TEMP_PERIOD  60           // Seconds
+#define WATCH_BED_TEMP_INCREASE 2           // Degrees Celsius
 /********************************************************************************/
 
 
@@ -624,9 +642,21 @@
  *****************************************************************************************/
 //#define ADVANCE
 
-#define EXTRUDER_ADVANCE_K .0
+#define EXTRUDER_ADVANCE_K 0.0
 #define D_FILAMENT 1.75
-#define STEPS_PER_CUBIC_MM_E 0.85
+/*****************************************************************************************/
+
+
+/*****************************************************************************************
+ ****************** Extruder Advance Linear Pressure Control *****************************
+ *****************************************************************************************
+ *                                                                                       *
+ * Assumption: advance = k * (delta velocity)                                            *
+ * K=0 means advance disabled. A good value for a gregs wade extruder will be around K=75*
+ *                                                                                       *
+ *****************************************************************************************/
+//#define ADVANCE_LPC
+#define ADVANCE_LPC_K 75
 /*****************************************************************************************/
 
 
@@ -1074,6 +1104,7 @@
 /**************************************************************************/
 
 
+
 //===========================================================================
 //============================= ADDON FEATURES ==============================
 //===========================================================================
@@ -1130,9 +1161,25 @@
 /*****************************************************************************************/
 
 
-/************************************************************************************************
- ********************************************* LCD **********************************************
- ************************************************************************************************/
+/***********************************************************************
+ *************************** LCD Language ******************************
+ ***********************************************************************
+ *                                                                     *
+ * Here you may choose the language used by MK or MK4due               *
+ * on the LCD menus, the following                                     *
+ *                                                                     *
+ * list of languages are available:                                    *
+ *    en, pl, fr, de, es, ru, it, pt, fi, an, nl, ca, eu               *
+ *    pt-br, bg, kana, kana_utf8, cn                                   *
+ *                                                                     *
+ ***********************************************************************/
+#define LCD_LANGUAGE en
+/***********************************************************************/
+
+
+/***********************************************************************
+ ******************************* LCD ***********************************
+ ***********************************************************************/
 
 //Charset type
 //Choose ONE of these 3 charsets. This has to match your hardware.

MK/Configuration_Store.cpp

-#include "base.h"
+/**
+ * MK & MK4due 3D Printer Firmware
+ *
+ * Based on Marlin, Sprinter and grbl
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ * Copyright (C) 2013 - 2016 Alberto Cotronei @MagoKimbra
+ *
+ * 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/>.
+ *
+ */
 
 /**
  * configuration_store.cpp
@@ -15,6 +35,7 @@
  *       either sets a Sane Default, or results in No Change to the existing value.
  *
  */
+#include "base.h"
 
 #define EEPROM_VERSION "MKV429"
 

MK/Configuration_Store.h

+/**
+ * MK & MK4due 3D Printer Firmware
+ *
+ * Based on Marlin, Sprinter and grbl
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ * Copyright (C) 2013 - 2016 Alberto Cotronei @MagoKimbra
+ *
+ * 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/>.
+ *
+ */
+
 #ifndef CONFIGURATION_STORE_H
-#define CONFIGURATION_STORE_H
+  #define CONFIGURATION_STORE_H
 
-void Config_ResetDefault();
-void ConfigSD_ResetDefault();
+  void Config_ResetDefault();
+  void ConfigSD_ResetDefault();
 
-#if DISABLED(DISABLE_M503)
-void Config_PrintSettings(bool forReplay = false);
-void ConfigSD_PrintSettings(bool forReplay = false);
-#else
-FORCE_INLINE void Config_PrintSettings(bool forReplay = false) {}
-FORCE_INLINE void ConfigSD_PrintSettings(bool forReplay = false) {}
-#endif
+  #if DISABLED(DISABLE_M503)
+    void Config_PrintSettings(bool forReplay = false);
+    void ConfigSD_PrintSettings(bool forReplay = false);
+  #else
+    FORCE_INLINE void Config_PrintSettings(bool forReplay = false) {}
+    FORCE_INLINE void ConfigSD_PrintSettings(bool forReplay = false) {}
+  #endif
 
-#if ENABLED(EEPROM_SETTINGS)
-void Config_StoreSettings();
-void Config_RetrieveSettings();
-#else
-FORCE_INLINE void Config_StoreSettings() {}
-FORCE_INLINE void Config_RetrieveSettings() { Config_ResetDefault(); Config_PrintSettings(); }
-#endif
+  #if ENABLED(EEPROM_SETTINGS)
+    void Config_StoreSettings();
+    void Config_RetrieveSettings();
+  #else
+    FORCE_INLINE void Config_StoreSettings() {}
+    FORCE_INLINE void Config_RetrieveSettings() { Config_ResetDefault(); Config_PrintSettings(); }
+  #endif
 
-#if ENABLED(SDSUPPORT) && ENABLED(SD_SETTINGS)
-#define CFG_SD_MAX_KEY_LEN    3+1         // icrease this if you add key name longer than the actual value.
-#define CFG_SD_MAX_VALUE_LEN  10+1        // this should be enought for int, long and float if you need to retrive strings increase this carefully
-//(11 = strlen("4294967295")+1) (4294967295 = (2^32)-1) (32 = the num of bits of the bigger basic data scructor used)
-//If yuou need to save string increase this to strlen("YOUR LONGER STRING")+1
-void ConfigSD_StoreSettings();
-void ConfigSD_RetrieveSettings(bool addValue = false);
-int ConfigSD_KeyIndex(char *key);
-#else
-FORCE_INLINE void ConfigSD_RetrieveSettings() {  ConfigSD_ResetDefault(); }
-#endif
+  #if ENABLED(SDSUPPORT) && ENABLED(SD_SETTINGS)
+    #define CFG_SD_MAX_KEY_LEN    3+1         // icrease this if you add key name longer than the actual value.
+    #define CFG_SD_MAX_VALUE_LEN  10+1        // this should be enought for int, long and float if you need to retrive strings increase this carefully
+    //(11 = strlen("4294967295")+1) (4294967295 = (2^32)-1) (32 = the num of bits of the bigger basic data scructor used)
+    //If yuou need to save string increase this to strlen("YOUR LONGER STRING")+1
+    void ConfigSD_StoreSettings();
+    void ConfigSD_RetrieveSettings(bool addValue = false);
+    int ConfigSD_KeyIndex(char *key);
+  #else
+    FORCE_INLINE void ConfigSD_RetrieveSettings() {  ConfigSD_ResetDefault(); }
+  #endif
 
 #endif //CONFIGURATION_STORE_H

MK/Configuration_Version.h

+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 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/>.
+ *
+ */
+
 #ifndef CONFIGURATION_VERSION_H
   #define CONFIGURATION_VERSION_H
 
   #define FIRMWARE_NAME "MK"
-  #define SHORT_BUILD_VERSION "4.2.8_dev"
+  #define SHORT_BUILD_VERSION "4.2.81_dev"
   #define BUILD_VERSION FIRMWARE_NAME "_" SHORT_BUILD_VERSION
   #define STRING_DISTRIBUTION_DATE __DATE__ " " __TIME__    // build date and time
   // It might also be appropriate to define a location where additional information can be found

MK/base.h

@@ -59,6 +59,7 @@
 #include "module/motion/planner.h"
 #include "module/motion/stepper_indirection.h"
 #include "module/motion/stepper.h"
+#include "module/motion/endstops.h"
 #include "module/motion/vector_3.h"
 #include "module/motion/qr_solve.h"
 #include "module/motion/cartesian_correction.h"

MK/module/MK_Main.h

@@ -36,23 +36,26 @@ void idle(
 
 void manage_inactivity(bool ignore_stepper_queue = false);
 
+#if ENABLED(DUAL_X_CARRIAGE)
+  extern bool extruder_duplication_enabled;
+#endif
+
 void FlushSerialRequestResend();
 void ok_to_send();
 
 #if MECH(DELTA)
-  float probe_bed(float x, float y);
-  void set_delta_constants();
-  void adj_tower_delta(int tower);
-  void adj_tower_radius(int tower);
-  void home_delta_axis();
-  void calibration_report();
-  void bed_probe_all();
   void set_delta_constants();
   void calculate_delta(float cartesian[3]);
-  void adjust_delta(float cartesian[3]);
-  void adj_endstops();
-  void reset_bed_level();
-  void prepare_move_raw();
+  static float probe_bed(float x, float y);
+  static void adj_tower_delta(int tower);
+  static void adj_tower_radius(int tower);
+  static void home_delta_axis();
+  static void calibration_report();
+  static void bed_probe_all();
+  static void adjust_delta(float cartesian[3]);
+  static void adj_endstops();
+  static void reset_bed_level();
+  static void prepare_move_raw();
   extern float delta[3];
   extern float delta_tmp[3];
   extern float delta_tower1_x, delta_tower1_y;
@@ -71,11 +74,7 @@ void ok_to_send();
   void calculate_SCARA_forward_Transform(float f_scara[3]);
 #endif
 
-void prepare_move(
-  #if MECH(DELTA)
-    const bool delta_probe = false
-  #endif
-);
+void prepare_move();
 
 void kill(const char *);
 void Stop();
@@ -113,7 +112,7 @@ void prepare_arc_move(char isclockwise);
 void clamp_to_software_endstops(float target[3]);
 
 extern millis_t previous_cmd_ms;
-void refresh_cmd_timeout();
+inline void refresh_cmd_timeout() { previous_cmd_ms = millis(); }
 
 extern void delay_ms(millis_t ms);
 
@@ -140,6 +139,10 @@ extern bool axis_known_position[3];
 extern bool axis_homed[3];
 extern float zprobe_zoffset;
 
+#if ENABLED(ADVANCE_LPC)
+  extern int extruder_advance_k;
+#endif
+
 #if HEATER_USES_AD595
   extern float ad595_offset[HOTENDS];
   extern float ad595_gain[HOTENDS];

MK/module/conditionals.h

@@ -368,6 +368,17 @@
   #define Y_MAX_LENGTH (Y_MAX_POS - (Y_MIN_POS))
   #define Z_MAX_LENGTH (Z_MAX_POS - (Z_MIN_POS))
 
+  /**
+   * CoreXY or CoreYX or CoreXZ or CoreZX
+   */
+  #if MECH(COREXY) || MECH(COREYX)
+    #define CORE_AXIS_2 B_AXIS
+    #define CORE_AXIS_3 Z_AXIS
+  #elif MECH(COREXZ) || MECH(COREZX)
+    #define CORE_AXIS_2 C_AXIS
+    #define CORE_AXIS_3 Y_AXIS
+  #endif
+
   /**
    * SCARA
    */
@@ -505,7 +516,7 @@
    */
   #if ENABLED(ADVANCE)
     #define EXTRUSION_AREA (0.25 * (D_FILAMENT) * (D_FILAMENT) * M_PI)
-    #define STEPS_PER_CUBIC_MM_E (axis_steps_per_unit[E_AXIS + active_extruder] / EXTRUSION_AREA)
+    #define STEPS_PER_CUBIC_MM_E (axis_steps_per_unit[E_AXIS + active_extruder] / (EXTRUSION_AREA))
   #endif
 
   /**
@@ -754,6 +765,10 @@
 
   #define HAS_DIGIPOTSS (PIN_EXISTS(DIGIPOTSS))
 
+  #define HAS_TEMP_HOTEND (HAS_TEMP_0 || ENABLED(HEATER_0_USES_MAX6675))
+
+  #define HAS_THERMALLY_PROTECTED_BED (HAS_TEMP_BED && HAS_HEATER_BED && ENABLED(THERMAL_PROTECTION_BED))
+
   /**
    * Shorthand for filament sensor and power sensor for ultralcd.cpp, dogm_lcd_implementation.h, ultralcd_implementation_hitachi_HD44780.h
    */

MK/module/language/language.h

@@ -23,32 +23,9 @@
 #ifndef LANGUAGE_H
 #define LANGUAGE_H
 
-// NOTE: IF YOU CHANGE LANGUAGE FILES OR MERGE A FILE WITH CHANGES
-//
-//   ==> ALWAYS TRY TO COMPILE MARLIN WITH/WITHOUT "ULTIPANEL" / "ULTRALCD" / "SDSUPPORT" #define IN "Configuration_Basic.h"
-//   ==> ALSO TRY ALL AVAILABLE "LANGUAGE_CHOICE" OPTIONS
-// See also documentation/LCDLanguageFont.md
-
-// Languages
-// 1  English  // Language base
-// 2  Polish
-// 3  French
-// 4  German
-// 5  Spanish
-// 6  Russian
-// 7  Italian
-// 8  Portuguese
-// 9  Finnish
-// 10 Aragonese
-// 11 Dutch
-// 12 Danish
-// 13 Catalan
-// 14 Basque-Euskera
-// 15 Portuguese (Brazil)
-// 16 Bulgarian
-// 17 Japanese
-// 18 Japanese utf
-// 19 Chinese
+#ifndef LCD_LANGUAGE
+  #define LCD_LANGUAGE en
+#endif
 
 #define PROTOCOL_VERSION "2.0"
 
@@ -223,7 +200,7 @@
 #define SERIAL_HEATER_BED                       "bed"
 #define SERIAL_STOPPED_HEATER                   ", system stopped! Heater_ID: "
 #define SERIAL_STOPPED_COOLER                   "system stopped! Cooler"
-//#define SERIAL_REDUNDANCY                     "Heater switched off. Temperature difference between temp sensors is too high !"
+#define SERIAL_REDUNDANCY                       "Heater switched off. Temperature difference between temp sensors is too high !"
 #define SERIAL_T_HEATING_FAILED                 "Heating failed"
 #define SERIAL_T_THERMAL_RUNAWAY                "Thermal Runaway"
 #define SERIAL_T_MAXTEMP                        "MAXTEMP triggered"
@@ -253,45 +230,13 @@
 #define SERIAL_BED_LEVELLING_Y                  " Y: "
 #define SERIAL_BED_LEVELLING_Z                  " Z: "
 
-#if   LANGUAGE_CHOICE == 1  // English
-  #include "language_en.h"
-#elif LANGUAGE_CHOICE == 2  // Polish
-  #include "language_pl.h"
-#elif LANGUAGE_CHOICE == 3  // French
-  #include "language_fr.h"
-#elif LANGUAGE_CHOICE == 4  // German
-  #include "language_de.h"
-#elif LANGUAGE_CHOICE == 5  // Spanish
-  #include "language_es.h"
-#elif LANGUAGE_CHOICE == 6  // Russian
-	#define MAPPER_D0D1       // For Cyrillic
-  #include "language_ru.h"
-#elif LANGUAGE_CHOICE == 7  // Italian
-  #include "language_it.h"
-#elif LANGUAGE_CHOICE == 8  // Portuguese
-  #include "language_pt.h"
-#elif LANGUAGE_CHOICE == 9  // Finnish
-  #include "language_fi.h"
-#elif LANGUAGE_CHOICE == 10 // Aragonese
-  #include "language_an.h"
-#elif LANGUAGE_CHOICE == 11 // Dutch
-  #include "language_nl.h"
-#elif LANGUAGE_CHOICE == 12 // Danish
-  #include "language_da.h"
-#elif LANGUAGE_CHOICE == 13 // Catalan
-  #include "language_ca.h"
-#elif LANGUAGE_CHOICE == 14 // Basque-Euskera
-  #include "language_eu.h"
-#elif LANGUAGE_CHOICE == 15 // Portuguese - Brasil
-  #include "language_pt-br.h"
-#elif LANGUAGE_CHOICE == 16 // Bulgarian
-  #include "language_bg.h"
-#elif LANGUAGE_CHOICE == 17 // Japanese
-  #include "language_kana.h"
-#elif LANGUAGE_CHOICE == 18 // Japanese utf
-  #include "language_kana_utf8.h"
-#elif LANGUAGE_CHOICE == 19 // Chinese
-  #include "language_cn.h"
-#endif
+// LCD Menu Messages
+
+#define LANGUAGE_INCL_(M) STRINGIFY_(language_##M.h)
+#define LANGUAGE_INCL(M) LANGUAGE_INCL_(M)
+#define INCLUDE_LANGUAGE LANGUAGE_INCL(LCD_LANGUAGE)
+
+#include "language_en.h"
+#include INCLUDE_LANGUAGE
 
 #endif //__LANGUAGE_H

MK/module/language/language_an.h

@@ -74,6 +74,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_bg.h

@@ -74,6 +74,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_ca.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_cn.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_da.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_de.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_en.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_es.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_eu.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_fi.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_fr.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_it.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"
@@ -151,13 +152,13 @@
 #define MSG_BABYSTEP_Z                      MSG_BABYSTEP " " MSG_Z
 #define MSG_ENDSTOP_ABORT                   "Finecorsa abort."
 #define MSG_HEATING_FAILED_LCD              "Riscaldamento fallito"
-#define MSG_ERR_REDUNDANT_TEMP              "REDUNDANT TEMP ERROR"
-#define MSG_THERMAL_RUNAWAY                 "THERMAL RUNAWAY"
+#define MSG_ERR_REDUNDANT_TEMP              "Err: TEMP RIDONDANTI"
+#define MSG_THERMAL_RUNAWAY                 "TEMP FUORI CONTROLLO"
 #define MSG_AD595                           "AD595 Offset & Gain"
-#define MSG_ERR_MAXTEMP                     "MAXTEMP ERROR"
-#define MSG_ERR_MINTEMP                     "MINTEMP ERROR"
-#define MSG_ERR_MAXTEMP_BED                 "MAXTEMP BED ERROR"
-#define MSG_ERR_MINTEMP_BED                 "MINTEMP BED ERROR"
+#define MSG_ERR_MAXTEMP                     "Err: TEMP MASSIMA"
+#define MSG_ERR_MINTEMP                     "Err: TEMP MINIMA"
+#define MSG_ERR_MAXTEMP_BED                 "Err: TEMP MASSIMA PIATTO"
+#define MSG_ERR_MINTEMP_BED                 "Err: TEMP MINIMA PIATTO"
 #define MSG_END_DAY                         "giorni"
 #define MSG_END_HOUR                        "ore"
 #define MSG_END_MINUTE                      "minuti"

MK/module/language/language_kana.h

@@ -75,6 +75,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_kana_utf8.h

@@ -78,6 +78,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_nl.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_pl.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_pt-br.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_pt.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/language/language_ru.h

@@ -73,6 +73,7 @@
 #define MSG_PID_P                           "PID-P"
 #define MSG_PID_I                           "PID-I"
 #define MSG_PID_D                           "PID-D"
+#define MSG_PID_C                           "PID-C"
 #define MSG_H1                              " H1"
 #define MSG_H2                              " H2"
 #define MSG_H3                              " H3"

MK/module/lcd/ultralcd.cpp

@@ -2723,10 +2723,17 @@ char* ftostr32sp(const float& x) {
   return conv;
 }
 
-// Convert int to lj string with +123.0 format
-char* itostr31(const int& x) {
-  conv[0] = x >= 0 ? '+' : '-';
-  int xx = abs(x);
+// Convert signed int to lj string with +012 / -012 format
+char* itostr3sign(const int& x) {
+  int xx;
+  if (x >= 0) {
+    conv[0] = '+';
+    xx = x;
+  }
+  else {
+    conv[0] = '-';
+    xx = -x;
+  }
   conv[1] = (xx / 100) % 10 + '0';
   conv[2] = (xx / 10) % 10 + '0';
   conv[3] = xx % 10 + '0';

MK/module/lcd/ultralcd.h

@@ -163,7 +163,7 @@
   #endif // NEWPANEL
 
   char* itostr2(const uint8_t& x);
-  char* itostr31(const int& xx);
+  char* itostr3sign(const int& x);
   char* itostr3(const int& xx);
   char* itostr3left(const int& xx);
   char* itostr4(const int& xx);
@@ -195,8 +195,8 @@
   FORCE_INLINE void lcd_reset_alert_level() {}
   FORCE_INLINE bool lcd_detected(void) { return true; }
 
-  #define LCD_MESSAGEPGM(x) do{}while(0)
-  #define LCD_ALERTMESSAGEPGM(x) do{}while(0)
+  #define LCD_MESSAGEPGM(x) NOOP
+  #define LCD_ALERTMESSAGEPGM(x) NOOP
 
 #endif //ULTRA_LCD
 

MK/module/lcd/ultralcd_implementation_hitachi_HD44780.h

@@ -474,7 +474,7 @@ char lcd_printPGM(const char* str) {
   return n;
 }
 
-char lcd_print(char* str) {
+char lcd_print(const char* str) {
   char c, n = 0;
   unsigned char i = 0;
   while ((c = str[i++])) n += charset_mapper(c);

MK/module/macros.h

@@ -76,4 +76,6 @@
 
 #define NOOP do{}while(0)
 
+#define _AXIS(AXIS) AXIS ##_AXIS
+
 #endif //__MACROS_H

MK/module/motion/endstops.h

+/**
+ * MK & MK4due 3D Printer Firmware
+ *
+ * Based on Marlin, Sprinter and grbl
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ * Copyright (C) 2013 - 2016 Alberto Cotronei @MagoKimbra
+ *
+ * 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/>.
+ *
+ */
+
+/**
+ *  endstops.h - manages endstops
+ */
+
+#ifndef ENDSTOPS_H
+#define ENDSTOPS_H
+
+enum EndstopEnum {X_MIN = 0, Y_MIN = 1, Z_MIN = 2, Z_PROBE = 3, X_MAX = 4, Y_MAX = 5, Z_MAX = 6, Z2_MIN = 7, Z2_MAX = 8, E_MIN = 9};
+
+class Endstops {
+
+  public:
+
+    volatile char endstop_hit_bits; // use X_MIN, Y_MIN, Z_MIN and Z_PROBE as BIT value
+
+    #if ENABLED(Z_DUAL_ENDSTOPS)
+      uint16_t current_endstop_bits = 0,
+                   old_endstop_bits = 0;
+    #else
+      byte current_endstop_bits = 0,
+               old_endstop_bits = 0;
+    #endif
+        
+
+    bool enabled = true;
+    bool enabled_globally =
+      #if ENABLED(ENDSTOPS_ONLY_FOR_HOMING)
+        false
+      #else
+        true
+      #endif
+    ;
+
+    Endstops();
+
+    /**
+     * Initialize the endstop pins
+     */
+    void init();
+
+    /**
+     * Update the endstops bits from the pins
+     */
+    void update();
+
+    /**
+     * Print an error message reporting the position when the endstops were last hit.
+     */
+    void report_state(); //call from somewhere to create an serial error message with the locations the endstops where hit, in case they were triggered
+
+    /**
+     * Report endstop positions in response to M119
+     */
+    void M119();
+
+    // Enable / disable endstop checking globally
+    FORCE_INLINE void enable_globally(bool onoff = true) { enabled_globally = enabled = onoff; }
+
+    // Enable / disable endstop checking
+    FORCE_INLINE void enable(bool onoff = true) { enabled = onoff; }
+
+    // Disable / Enable endstops based on ENSTOPS_ONLY_FOR_HOMING and global enable
+    FORCE_INLINE void not_homing() { enabled = enabled_globally; }
+
+    // Clear endstops (i.e., they were hit intentionally) to suppress the report
+    FORCE_INLINE void hit_on_purpose() { endstop_hit_bits = 0; }
+
+    // Enable / disable endstop z-probe checking
+    #if ENABLED(HAS_Z_PROBE)
+      volatile bool z_probe_enabled = false;
+      FORCE_INLINE void enable_z_probe(bool onoff = true) { z_probe_enabled = onoff; }
+    #endif
+
+  private:
+
+    #if ENABLED(Z_DUAL_ENDSTOPS)
+      void test_dual_z_endstops(EndstopEnum es1, EndstopEnum es2);
+    #endif
+};
+
+extern Endstops endstops;
+
+#endif // ENDSTOPS_H

MK/module/motion/planner.cpp

@@ -1037,7 +1037,7 @@ float junction_deviation = 0.1;
 
   // Compute and limit the acceleration rate for the trapezoid generator.
   float steps_per_mm = block->step_event_count / block->millimeters;
-  unsigned long bsx = block->steps[X_AXIS], bsy = block->steps[Y_AXIS], bsz = block->steps[Z_AXIS], bse = block->steps[E_AXIS];
+  long bsx = block->steps[X_AXIS], bsy = block->steps[Y_AXIS], bsz = block->steps[Z_AXIS], bse = block->steps[E_AXIS];
   if (bsx == 0 && bsy == 0 && bsz == 0) {
     block->acceleration_st = ceil(retract_acceleration[extruder] * steps_per_mm); // convert to: acceleration steps/sec^2
   }
@@ -1171,7 +1171,20 @@ float junction_deviation = 0.1;
     ECHO_SMV(OK, "advance :", block->advance/256);
     ECHO_EMV("advance rate :", block->advance_rate/256);
     */
-  #endif // ADVANCE
+  #elif ENABLED(ADVANCE_LPC) // ADVANCE_LPC
+    // bse == allsteps: A problem occurs when there's a very tiny move before a retract.
+    // In this case, the retract and the move will be executed together.
+    // This leads to an enormous number of advance steps due to a huge e_acceleration.
+    // The math is correct, but you don't want a retract move done with advance!
+    // So this situation is filtered out here.
+    if (!bse || (!bsx && !bsy && !bsz) || extruder_advance_k == 0 || bse == allsteps) {
+      block->use_advance_lead = false;
+    }
+    else {
+      block->use_advance_lead = true;
+      block->e_speed_multiplier8 = (block->steps[E_AXIS] << 8) / block->step_event_count;
+    }
+  #endif
 
   calculate_trapezoid_for_block(block, block->entry_speed / block->nominal_speed, safe_speed / block->nominal_speed);
 

MK/module/motion/planner.h

@@ -49,25 +49,32 @@
 // This struct is used when buffering the setup for each linear movement "nominal" values are as specified in
 // the source g-code and may never actually be reached if acceleration management is active.
 typedef struct {
+
+  unsigned char active_driver;              // Selects the active driver
+
   // Fields used by the bresenham algorithm for tracing the line
   unsigned long steps[NUM_AXIS];                      // Step count along each axis
+  unsigned long step_event_count;           // The number of step events required to complete this block
 
   #if ENABLED(COLOR_MIXING_EXTRUDER)
     unsigned long mix_event_count[DRIVER_EXTRUDERS];  // Step count for each stepper in a mixing extruder
   #endif
 
-  unsigned long step_event_count;           // The number of step events required to complete this block
   long accelerate_until;                    // The index of the step event on which to stop acceleration
   long decelerate_after;                    // The index of the step event on which to start decelerating
   long acceleration_rate;                   // The acceleration rate used for acceleration calculation
+
   unsigned char direction_bits;             // The direction bit set for this block (refers to *_DIRECTION_BIT in config.h)
-  unsigned char active_driver;              // Selects the active driver
 
+  // Advance extrusion
   #if ENABLED(ADVANCE)
     long advance_rate;
     volatile long initial_advance;
     volatile long final_advance;
     float advance;
+  #elif ENABLED(ADVANCE_LPC)
+    bool use_advance_lead;
+    int e_speed_multiplier8;
   #endif
 
   // Fields used by the motion planner to manage acceleration

MK/module/motion/stepper.h

@@ -34,11 +34,14 @@
    * A_AXIS and C_AXIS are used by COREXZ or COREZX printers
    * X_HEAD and Y_HEAD and Z_HEAD is used for systems that don't have a 1:1 relationship between X_AXIS and X Head movement, like CoreXY bots.
    */
-  enum AxisEnum {X_AXIS=0, A_AXIS=0, Y_AXIS=1, B_AXIS=1, Z_AXIS=2, C_AXIS=2, E_AXIS=3, X_HEAD=4, Y_HEAD=5, Z_HEAD=5};
-  enum EndstopEnum {X_MIN=0, Y_MIN=1, Z_MIN=2, Z_PROBE=3, X_MAX=4, Y_MAX=5, Z_MAX=6, Z2_MIN=7, Z2_MAX=8, E_MIN=9};
+  enum AxisEnum {X_AXIS = 0, A_AXIS = 0, Y_AXIS = 1, B_AXIS = 1, Z_AXIS = 2, C_AXIS = 2, E_AXIS = 3, X_HEAD = 4, Y_HEAD = 5, Z_HEAD = 5};
 
   #if ENABLED(ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED)
-    extern bool abort_on_endstop_hit;
+    #if ENABLED(ABORT_ON_ENDSTOP_HIT_INIT)
+      bool abort_on_endstop_hit = ABORT_ON_ENDSTOP_HIT_INIT;
+    #else
+      bool abort_on_endstop_hit = false;
+    #endif
   #endif
 
   // Initialize and start the stepper motor subsystem
@@ -69,10 +72,20 @@
   //
   void report_positions();
 
-  void checkHitEndstops(); //call from somewhere to create an serial error message with the locations the endstops where hit, in case they were triggered
-  void endstops_hit_on_purpose(); //avoid creation of the message, i.e. after homing and before a routine call of checkHitEndstops();
+  //
+  // Handle a triggered endstop
+  //
+  void endstop_triggered(AxisEnum axis);
+
+  //
+  // Triggered position of an axis in mm (not core-savvy)
+  //
+  float triggered_position_mm(AxisEnum axis);
 
-  void enable_endstops(bool check); // Enable/disable endstop checking
+  //
+  // The direction of a single motor
+  //
+  bool motor_direction(AxisEnum axis);
 
   void checkStepperErrors(); //Print errors detected by the stepper
 
@@ -91,6 +104,7 @@
   void digipot_current(uint8_t driver, int current);
   void microstep_init();
   void microstep_readings();
+  void kill_current_block();
 
   #if ENABLED(Z_DUAL_ENDSTOPS)
     void In_Homing_Process(bool state);

MK/module/motion/stepper_indirection.h

@@ -232,7 +232,6 @@
     #define NORM_E_DIR()    { switch(current_block->active_driver) { case 1: E1_DIR_WRITE(!INVERT_E1_DIR); break; case 0: E0_DIR_WRITE(!INVERT_E0_DIR); break; }}
     #define REV_E_DIR()     { switch(current_block->active_driver) { case 1: E1_DIR_WRITE( INVERT_E1_DIR); break; case 0: E0_DIR_WRITE( INVERT_E0_DIR); break; }}
   #else
-    extern bool extruder_duplication_enabled;
     #define E_STEP_WRITE(v) { if(extruder_duplication_enabled) { E0_STEP_WRITE(v); E1_STEP_WRITE(v); } else if(current_block->active_driver == 1) { E1_STEP_WRITE(v); } else { E0_STEP_WRITE(v); }}
     #define NORM_E_DIR()    { if(extruder_duplication_enabled) { E0_DIR_WRITE(!INVERT_E0_DIR); E1_DIR_WRITE(!INVERT_E1_DIR); } else if(current_block->active_driver == 1) { E1_DIR_WRITE(!INVERT_E1_DIR); } else { E0_DIR_WRITE(!INVERT_E0_DIR); }}
     #define REV_E_DIR()     { if(extruder_duplication_enabled) { E0_DIR_WRITE( INVERT_E0_DIR); E1_DIR_WRITE( INVERT_E1_DIR); } else if(current_block->active_driver == 1) { E1_DIR_WRITE( INVERT_E1_DIR); } else { E0_DIR_WRITE( INVERT_E0_DIR); }}

MK/module/sanitycheck.h

@@ -174,8 +174,8 @@
   #endif
 
   // Language
-  #if DISABLED(LANGUAGE_CHOICE)
-    #error DEPENDENCY ERROR: Missing setting LANGUAGE_CHOICE
+  #if DISABLED(LCD_LANGUAGE)
+    #error DEPENDENCY ERROR: Missing setting LCD_LANGUAGE
   #endif
 
   /// FEATURE
@@ -415,6 +415,12 @@
     #endif
   #endif
 
+  /**
+   * Advance Extrusion
+   */
+  #if ENABLED(ADVANCE) && ENABLED(ADVANCE_LPC)
+    #error You can enable ADVANCE or ADVANCE_LPC, but not both.
+  #endif
   #if ENABLED(ADVANCE)
     #if DISABLED(EXTRUDER_ADVANCE_K)
       #error DEPENDENCY ERROR: Missing setting EXTRUDER_ADVANCE_K

MK/module/stopwatch/stopwatch.cpp

@@ -29,29 +29,29 @@ Stopwatch::Stopwatch() {
 
 void Stopwatch::stop() {
   #if ENABLED(DEBUG_STOPWATCH)
-    debug(PSTR("stop"));
+    Stopwatch::debug(PSTR("stop"));
   #endif
 
   if (!this->isRunning()) return;
 
-  this->status = STPWTCH_STOPPED;
+  this->state = STPWTCH_STOPPED;
   this->stopTimestamp = millis();
 }
 
 void Stopwatch::pause() {
   #if ENABLED(DEBUG_STOPWATCH)
-    debug(PSTR("pause"));
+    Stopwatch::debug(PSTR("pause"));
   #endif
 
   if (!this->isRunning()) return;
 
-  this->status = STPWTCH_PAUSED;
+  this->state = STPWTCH_PAUSED;
   this->stopTimestamp = millis();
 }
 
 void Stopwatch::start() {
   #if ENABLED(DEBUG_STOPWATCH)
-    debug(PSTR("start"));
+    Stopwatch::debug(PSTR("start"));
   #endif
 
   if (this->isRunning()) return;
@@ -59,27 +59,27 @@ void Stopwatch::start() {
   if (this->isPaused()) this->accumulator = this->duration();
   else this->reset();
 
-  this->status = STPWTCH_RUNNING;
+  this->state = STPWTCH_RUNNING;
   this->startTimestamp = millis();
 }
 
 void Stopwatch::reset() {
   #if ENABLED(DEBUG_STOPWATCH)
-    debug(PSTR("reset"));
+    Stopwatch::debug(PSTR("reset"));
   #endif
 
-  this->status = STPWTCH_STOPPED;
+  this->state = STPWTCH_STOPPED;
   this->startTimestamp = 0;
   this->stopTimestamp = 0;
   this->accumulator = 0;
 }
 
 bool Stopwatch::isRunning() {
-  return (this->status == STPWTCH_RUNNING) ? true : false;
+  return (this->state == STPWTCH_RUNNING) ? true : false;
 }
 
 bool Stopwatch::isPaused() {
-  return (this->status == STPWTCH_PAUSED) ? true : false;
+  return (this->state == STPWTCH_PAUSED) ? true : false;
 }
 
 uint16_t Stopwatch::duration() {

MK/module/stopwatch/stopwatch.h

@@ -26,7 +26,7 @@
   // Print debug messages with M111 S2 (Uses 156 bytes of PROGMEM)
   //#define DEBUG_STOPWATCH
 
-  enum StopwatchStatus {
+  enum StopwatchState {
     STPWTCH_STOPPED,
     STPWTCH_RUNNING,
     STPWTCH_PAUSED
@@ -39,7 +39,7 @@
    */
   class Stopwatch {
     private:
-      StopwatchStatus status;
+      StopwatchState state;
       uint16_t accumulator;
       uint32_t startTimestamp;
       uint32_t stopTimestamp;

MK/module/temperature/temperature.cpp

@@ -113,8 +113,8 @@ unsigned char soft_pwm_cooler;
   enum TRState { TRReset, TRInactive, TRFirstRunnig, TRStable, TRRunaway };
   void thermal_runaway_protection(TRState* state, millis_t* timer, float temperature, float target_temperature, int temp_controller_id, int period_seconds, int hysteresis_degc);
   #if ENABLED(THERMAL_PROTECTION_HOTENDS)
-    static TRState thermal_runaway_state_machine[4] = { TRReset, TRReset, TRReset, TRReset };
-    static millis_t thermal_runaway_timer[4]; // = {0,0,0,0};
+    static TRState thermal_runaway_state_machine[HOTENDS] = { TRReset };
+    static millis_t thermal_runaway_timer[HOTENDS] = { 0 };
   #endif
   #if ENABLED(THERMAL_PROTECTION_BED) && TEMP_SENSOR_BED != 0
     static TRState thermal_runaway_bed_state_machine = TRReset;
@@ -125,6 +125,7 @@ unsigned char soft_pwm_cooler;
     static millis_t thermal_runaway_cooler_timer;
   #endif
 #endif
+
 #if HAS(POWER_CONSUMPTION_SENSOR)
   int current_raw_powconsumption = 0;  //Holds measured power consumption
   static unsigned long raw_powconsumption_value = 0;
@@ -245,6 +246,11 @@ static void updateTemperaturesFromRawValues();
   millis_t watch_cooler_next_ms = 0;
 #endif
 
+#if ENABLED(THERMAL_PROTECTION_BED)
+  int watch_target_bed_temp = 0;
+  millis_t watch_bed_next_ms = 0;
+#endif
+
 #if DISABLED(SOFT_PWM_SCALE)
   #define SOFT_PWM_SCALE 0
 #endif
@@ -346,12 +352,12 @@ void autotempShutdown() {
         #if HAS(AUTO_FAN)
           if (ms > next_auto_fan_check_ms) {
             checkExtruderAutoFans();
-            next_auto_fan_check_ms = ms + 2500;
+            next_auto_fan_check_ms = ms + 2500UL;
           }
         #endif
 
         if (running && ((input > temp && temp_controller >= -1) || (input < temp && temp_controller < -1))) {
-          if (ms > t2 + 5000) {
+          if (ms > t2 + 5000UL) {
             runnig = false;
 				if (temp_controller < -1)
 				  soft_pwm_cooler = (bias - d) >> 1;
@@ -369,7 +375,7 @@ void autotempShutdown() {
         }
 
         if (!running && ((input < temp && temp_controller >= -1) || (input > temp && temp_controller < -1))) {
-          if (ms > t1 + 5000) {
+          if (ms > t1 + 5000UL) {
             running = true;
             t2 = ms;
             t_low = t2 - t1;
@@ -833,7 +839,7 @@ void manage_temp_controller() {
     if (ct < max(HEATER_0_MINTEMP, 0.01)) min_temp_error(0);
   #endif
 
-  #if ENABLED(THERMAL_PROTECTION_HOTENDS) || DISABLED(PIDTEMPBED) || DISABLED(PIDTEMPCOOLER) || HAS(AUTO_FAN)
+  #if ENABLED(THERMAL_PROTECTION_HOTENDS) || ENABLED(THERMAL_PROTECTION_BED) || ENABLED(THERMAL_PROTECTION_COOLER) || DISABLED(PIDTEMPBED) || DISABLED(PIDTEMPCOOLER) || HAS(AUTO_FAN)
     millis_t ms = millis();
   #endif
 
@@ -867,9 +873,27 @@ void manage_temp_controller() {
 
     #endif // THERMAL_PROTECTION_HOTENDS
 
+    // Check if the temperature is failing to increase
+    #if ENABLED(THERMAL_PROTECTION_BED)
+
+      // Is it time to check the bed?
+      if (watch_bed_next_ms && ELAPSED(ms, watch_bed_next_ms)) {
+        // Has it failed to increase enough?
+        if (degBed() < watch_target_bed_temp) {
+          // Stop!
+          _temp_error(-1, PSTR(SERIAL_T_HEATING_FAILED), PSTR(MSG_HEATING_FAILED_LCD));
+        }
+        else {
+          // Start again if the target is still far off
+          start_watching_bed();
+        }
+      }
+
+    #endif // THERMAL_PROTECTION_HOTENDS
+
     #if ENABLED(TEMP_SENSOR_1_AS_REDUNDANT)
       if (fabs(current_temperature[0] - redundant_temperature) > MAX_REDUNDANT_TEMP_SENSOR_DIFF) {
-        _temp_error(0, PSTR(MSG_EXTRUDER_SWITCHED_OFF), PSTR(MSG_ERR_REDUNDANT_TEMP));
+        _temp_error(0, PSTR(SERIAL_REDUNDANCY), PSTR(MSG_ERR_REDUNDANT_TEMP));
       }
     #endif
 
@@ -930,7 +954,7 @@ void manage_temp_controller() {
         soft_pwm_bed = 0;
         WRITE_HEATER_BED(LOW);
       }
-    #else // BED_LIMIT_SWITCHING
+    #else // !PIDTEMPBED && !BED_LIMIT_SWITCHING
       // Check if temperature is within the correct range
       if (current_temperature_bed > BED_MINTEMP && current_temperature_bed < BED_MAXTEMP) {
         soft_pwm_bed = current_temperature_bed < target_temperature_bed ? MAX_BED_POWER >> 1 : 0;
@@ -1487,6 +1511,22 @@ void tp_init() {
   }
 #endif
 
+#if ENABLED(THERMAL_PROTECTION_BED)
+  /**
+   * Start Heating Sanity Check for bed that are below
+   * their target temperature by a configurable margin.
+   * This is called when the temperature is set. (M140, M190)
+   */
+  void start_watching_bed() {
+    if (degBed() < degTargetBed() - (WATCH_BED_TEMP_INCREASE + TEMP_BED_HYSTERESIS + 1)) {
+      watch_target_bed_temp = degBed() + WATCH_BED_TEMP_INCREASE;
+      watch_bed_next_ms = millis() + (WATCH_BED_TEMP_PERIOD) * 1000UL;
+    }
+    else
+      watch_bed_next_ms = 0;
+  }
+#endif
+
 
 #if ENABLED(THERMAL_PROTECTION_HOTENDS) || ENABLED(THERMAL_PROTECTION_BED) || ENABLED(THERMAL_PROTECTION_COOLER) 
 
@@ -1538,14 +1578,14 @@ void tp_init() {
         	 if (temperature >= tr_target_temperature[temp_controller_index] - hysteresis_degc)
             *timer = millis();
           // If the timer goes too long without a reset, trigger shutdown
-          else if (millis() > *timer + period_seconds * 1000UL)
+          else if (ELAPSED(millis() > *timer + period_seconds * 1000UL))
             *state = TRRunaway;
         }
         else { // COOLERS
 		    if (temperature <= tr_target_temperature[temp_controller_index] + hysteresis_degc)
 			   *timer = millis();
           // If the timer goes too long without a reset, trigger shutdown
-          else if (millis() > *timer + period_seconds * 1000UL)
+          else if (ELAPSED(millis() > *timer + period_seconds * 1000UL))
             *state = TRRunaway;
         }
         break;
@@ -1561,6 +1601,9 @@ void disable_all_heaters() {
   for (int i = 0; i < HOTENDS; i++) setTargetHotend(0, i);
   setTargetBed(0);
 
+  // If all heaters go down then for sure our print job has stopped
+  print_job_timer.stop();
+
   #define DISABLE_HEATER(NR) { \
     target_temperature[NR] = 0; \
     soft_pwm[NR] = 0; \
@@ -1607,59 +1650,61 @@ void disable_all_coolers() {
 }
 
 #if ENABLED(HEATER_0_USES_MAX6675)
+
   #define MAX6675_HEAT_INTERVAL 250u
-  static millis_t next_max6675_ms = 0;
-  int max6675_temp = 2000;
 
-  static int read_max6675() {
+  #if ENABLED(MAX6675_IS_MAX31855)
+    uint32_t max6675_temp = 2000;
+    #define MAX6675_ERROR_MASK 7
+    #define MAX6675_DISCARD_BITS 18
+  #else
+    uint16_t max6675_temp = 2000;
+    #define MAX6675_ERROR_MASK 4
+    #define MAX6675_DISCARD_BITS 3
+  #endif
+
+  int Temperature::read_max6675() {
+
+    static millis_t next_max6675_ms = 0;
 
     millis_t ms = millis();
 
-    if (ms < next_max6675_ms)
-      return max6675_temp;
+    if (PENDING(ms, next_max6675_ms)) return (int)max6675_temp;
 
     next_max6675_ms = ms + MAX6675_HEAT_INTERVAL;
 
-    max6675_temp = 0;
-
+    CBI(
       #ifdef PRR
-      CBI(PRR, PRSPI);
+        PRR
       #elif defined(PRR0)
-      CBI(PRR0, PRSPI);
+        PRR0
       #endif
-
+        , PRSPI);
     SPCR = _BV(MSTR) | _BV(SPE) | _BV(SPR0);
 
-    // enable TT_MAX6675
-    WRITE(MAX6675_SS, 0);
+    WRITE(MAX6675_SS, 0); // enable TT_MAX6675
 
     // ensure 100ns delay - a bit extra is fine
-    asm("nop"); // 50ns on 20Mhz, 62.5ns on 16Mhz
-    asm("nop"); // 50ns on 20Mhz, 62.5ns on 16Mhz
+    asm("nop");//50ns on 20Mhz, 62.5ns on 16Mhz
+    asm("nop");//50ns on 20Mhz, 62.5ns on 16Mhz
 
-    // read MSB
-    SPDR = 0;
-    for (; !TEST(SPSR, SPIF););
-    max6675_temp = SPDR;
-    max6675_temp <<= 8;
-
-    // read LSB
+    // Read a big-endian temperature value
+    max6675_temp = 0;
+    for (uint8_t i = sizeof(max6675_temp); i--;) {
       SPDR = 0;
-    for (; !TEST(SPSR, SPIF););
+      for (;!TEST(SPSR, SPIF););
       max6675_temp |= SPDR;
+      if (i > 0) max6675_temp <<= 8; // shift left if not the last byte
+    }
 
-    // disable TT_MAX6675
-    WRITE(MAX6675_SS, 1);
+    WRITE(MAX6675_SS, 1); // disable TT_MAX6675
 
-    if (max6675_temp & 4) {
-      // thermocouple open
-      max6675_temp = 4000;
-    }
-    else {
-      max6675_temp = max6675_temp >> 3;
-    }
+    if (max6675_temp & MAX6675_ERROR_MASK)
+      max6675_temp = 4000; // thermocouple open
+    else
+      max6675_temp >>= MAX6675_DISCARD_BITS;
 
-    return max6675_temp;
+    return (int)max6675_temp;
   }
 
 #endif // HEATER_0_USES_MAX6675

MK/module/temperature/temperature.h

@@ -138,7 +138,11 @@ FORCE_INLINE float degTargetCooler() { return target_temperature_cooler; }
 #endif
 
 #if ENABLED(THERMAL_PROTECTION_COOLERS)
-  void start_watching_cooler(void);
+  void start_watching_cooler();
+#endif
+
+#if ENABLED(THERMAL_PROTECTION_BED)
+  void start_watching_bed();
 #endif
 
 FORCE_INLINE void setTargetHotend(const float& celsius, uint8_t hotend) {
@@ -147,8 +151,21 @@ FORCE_INLINE void setTargetHotend(const float& celsius, uint8_t hotend) {
     start_watching_heater(HOTEND_ARG);
   #endif
 }
-FORCE_INLINE void setTargetBed(const float& celsius) { target_temperature_bed = celsius; }
-FORCE_INLINE void setTargetCooler(const float& celsius) { target_temperature_cooler = celsius; }
+
+FORCE_INLINE void setTargetBed(const float& celsius) {
+  target_temperature_bed = celsius;
+  #if ENABLED(THERMAL_PROTECTION_BED)
+    start_watching_bed();
+  #endif
+}
+
+FORCE_INLINE void setTargetCooler(const float& celsius) {
+  target_temperature_cooler = celsius;
+  #if ENABLED(THERMAL_PROTECTION_COOLER) && ENABLED(THERMAL_PROTECTION_COOLER_WATCHDOG)
+    start_watching_cooler();
+  #endif
+}
+
 
 FORCE_INLINE bool isHeatingHotend(uint8_t hotend) { return target_temperature[HOTEND_ARG] > current_temperature[HOTEND_ARG]; }
 FORCE_INLINE bool isHeatingBed() { return target_temperature_bed > current_temperature_bed; }

README.md

 <img align="right" src="Documentation/Logo/MarlinKimbra%20Logo%20GitHub.png" />
 # MarlinKimbra 3D Printer Firmware for Arduino
-## Version 4.2.8 dev
+## Version 4.2.81 dev
 
 ### Special thanks
 * all Marlin8bit-developers.