imported last Marlin changes

Marlin/Configuration.h

 #define EXTRUDE_MINTEMP 170
 #define EXTRUDE_MAXLENGTH (X_MAX_LENGTH+Y_MAX_LENGTH) //prevent extrusion of very large distances.
 
+/*================== Thermal Runaway Protection ==============================
+This is a feature to protect your printer from burn up in flames if it has
+a thermistor coming off place (this happened to a friend of mine recently and
+motivated me writing this feature).
+
+The issue: If a thermistor come off, it will read a lower temperature than actual.
+The system will turn the heater on forever, burning up the filament and anything
+else around.
+
+After the temperature reaches the target for the first time, this feature will 
+start measuring for how long the current temperature stays below the target 
+minus _HYSTERESIS (set_temperature - THERMAL_RUNAWAY_PROTECTION_HYSTERESIS).
+
+If it stays longer than _PERIOD, it means the thermistor temperature
+cannot catch up with the target, so something *may be* wrong. Then, to be on the
+safe side, the system will he halt.
+
+Bear in mind the count down will just start AFTER the first time the 
+thermistor temperature is over the target, so you will have no problem if
+your extruder heater takes 2 minutes to hit the target on heating.
+
+*/
+// If you want to enable this feature for all your extruder heaters,
+// uncomment the 2 defines below:
+
+// Parameters for all extruder heaters
+//#define THERMAL_RUNAWAY_PROTECTION_PERIOD 40 //in seconds
+//#define THERMAL_RUNAWAY_PROTECTION_HYSTERESIS 4 // in degree Celsius
+
+// If you want to enable this feature for your bed heater,
+// uncomment the 2 defines below:
+
+// Parameters for the bed heater
+//#define THERMAL_RUNAWAY_PROTECTION_BED_PERIOD 20 //in seconds
+//#define THERMAL_RUNAWAY_PROTECTION_BED_HYSTERESIS 2 // in degree Celsius
+//===========================================================================
+
+
 //===========================================================================
 //=============================Mechanical Settings===========================
 //===========================================================================

Marlin/Configuration_adv.h

 #ifdef FWRETRACT
   #define MIN_RETRACT 0.1                //minimum extruded mm to accept a automatic gcode retraction attempt
   #define RETRACT_LENGTH 3               //default retract length (positive mm)
+  #define RETRACT_LENGTH_SWAP 13         //default swap retract length (positive mm), for extruder change
   #define RETRACT_FEEDRATE 45            //default feedrate for retracting (mm/s)
   #define RETRACT_ZLIFT 0                //default retract Z-lift
   #define RETRACT_RECOVER_LENGTH 0       //default additional recover length (mm, added to retract length when recovering)
+  #define RETRACT_RECOVER_LENGTH_SWAP 0  //default additional swap recover length (mm, added to retract length when recovering from extruder change)
   #define RETRACT_RECOVER_FEEDRATE 8     //default feedrate for recovering from retraction (mm/s)
 #endif
 

Marlin/Marlin.h

 
 #ifdef FWRETRACT
 extern bool autoretract_enabled;
-extern bool retracted;
-extern float retract_length, retract_feedrate, retract_zlift;
-extern float retract_recover_length, retract_recover_feedrate;
+extern bool retracted[EXTRUDERS];
+extern float retract_length, retract_length_swap, retract_feedrate, retract_zlift;
+extern float retract_recover_length, retract_recover_length_swap, retract_recover_feedrate;
 #endif
 
 extern unsigned long starttime;

Marlin/Marlin_main.cpp

 
 #ifdef FWRETRACT
   bool autoretract_enabled=false;
-  bool retracted=false;
+  bool retracted[EXTRUDERS]={false
+    #if EXTRUDERS > 1
+    , false
+     #if EXTRUDERS > 2
+      , false
+     #endif
+  #endif
+  };
+  bool retracted_swap[EXTRUDERS]={false
+    #if EXTRUDERS > 1
+    , false
+     #if EXTRUDERS > 2
+      , false
+     #endif
+  #endif
+  };
+
   float retract_length = RETRACT_LENGTH;
+  float retract_length_swap = RETRACT_LENGTH_SWAP;
   float retract_feedrate = RETRACT_FEEDRATE;
   float retract_zlift = RETRACT_ZLIFT;
   float retract_recover_length = RETRACT_RECOVER_LENGTH;
+  float retract_recover_length_swap = RETRACT_RECOVER_LENGTH_SWAP;
   float retract_recover_feedrate = RETRACT_RECOVER_FEEDRATE;
 #endif
 
 float axis_scaling[3]={1,1,1};  // Build size scaling, default to 1
 #endif				
 
+bool cancel_heatup = false ;
+
 //===========================================================================
 //=============================Private Variables=============================
 //===========================================================================
 }
 
 #ifdef FWRETRACT
-  void retract(bool retracting) {
-    if(retracting && !retracted) {
+  void retract(bool retracting, bool swapretract = false) {
+    if(retracting && !retracted[active_extruder]) {
       destination[X_AXIS]=current_position[X_AXIS];
       destination[Y_AXIS]=current_position[Y_AXIS];
       destination[Z_AXIS]=current_position[Z_AXIS];
       destination[E_AXIS]=current_position[E_AXIS];
-      current_position[E_AXIS]+=retract_length/volumetric_multiplier[active_extruder];
+      if (swapretract) {
+        current_position[E_AXIS]+=retract_length_swap/volumetric_multiplier[active_extruder];
+      } else {
+        current_position[E_AXIS]+=retract_length/volumetric_multiplier[active_extruder];
+      }
       plan_set_e_position(current_position[E_AXIS]);
       float oldFeedrate = feedrate;
       feedrate=retract_feedrate*60;
-      retracted=true;
+      retracted[active_extruder]=true;
       prepare_move();
       current_position[Z_AXIS]-=retract_zlift;
       plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
       prepare_move();
       feedrate = oldFeedrate;
-    } else if(!retracting && retracted) {
+    } else if(!retracting && retracted[active_extruder]) {
       destination[X_AXIS]=current_position[X_AXIS];
       destination[Y_AXIS]=current_position[Y_AXIS];
       destination[Z_AXIS]=current_position[Z_AXIS];
       current_position[Z_AXIS]+=retract_zlift;
       plan_set_position(current_position[X_AXIS], current_position[Y_AXIS], current_position[Z_AXIS], current_position[E_AXIS]);
       //prepare_move();
-      current_position[E_AXIS]-=(retract_length+retract_recover_length)/volumetric_multiplier[active_extruder]; 
+      if (swapretract) {
+        current_position[E_AXIS]-=(retract_length_swap+retract_recover_length_swap)/volumetric_multiplier[active_extruder]; 
+      } else {
+        current_position[E_AXIS]-=(retract_length+retract_recover_length)/volumetric_multiplier[active_extruder]; 
+      }
       plan_set_e_position(current_position[E_AXIS]);
       float oldFeedrate = feedrate;
       feedrate=retract_recover_feedrate*60;
-      retracted=false;
+      retracted[active_extruder]=false;
       prepare_move();
       feedrate = oldFeedrate;
     }
       break;
       #ifdef FWRETRACT
       case 10: // G10 retract
+       #if EXTRUDERS > 1
+        retracted_swap[active_extruder]=(code_seen('S') && code_value_long() == 1); // checks for swap retract argument
+        retract(true,retracted_swap[active_extruder]);
+       #else
         retract(true);
+       #endif
       break;
       case 11: // G11 retract_recover
+       #if EXTRUDERS > 1
+        retract(false,retracted_swap[active_extruder]);
+       #else
         retract(false);
+       #endif 
       break;
       #endif //FWRETRACT
     case 28: //G28 Home all Axis one at a time
 
       /* See if we are heating up or cooling down */
       target_direction = isHeatingHotend(tmp_extruder); // true if heating, false if cooling
+      
+      cancel_heatup = false;
 
       #ifdef TEMP_RESIDENCY_TIME
         long residencyStart;
         residencyStart = -1;
         /* continue to loop until we have reached the target temp
           _and_ until TEMP_RESIDENCY_TIME hasn't passed since we reached it */
-        while((residencyStart == -1) ||
-              (residencyStart >= 0 && (((unsigned int) (millis() - residencyStart)) < (TEMP_RESIDENCY_TIME * 1000UL))) ) {
+        while((!cancel_heatup)&&((residencyStart == -1) ||
+              (residencyStart >= 0 && (((unsigned int) (millis() - residencyStart)) < (TEMP_RESIDENCY_TIME * 1000UL)))) ) {
       #else
         while ( target_direction ? (isHeatingHotend(tmp_extruder)) : (isCoolingHotend(tmp_extruder)&&(CooldownNoWait==false)) ) {
       #endif //TEMP_RESIDENCY_TIME
           CooldownNoWait = false;
         }
         codenum = millis();
-
+        
+        cancel_heatup = false;
         target_direction = isHeatingBed(); // true if heating, false if cooling
 
-        while ( target_direction ? (isHeatingBed()) : (isCoolingBed()&&(CooldownNoWait==false)) )
+        while ( (target_direction)&&(!cancel_heatup) ? (isHeatingBed()) : (isCoolingBed()&&(CooldownNoWait==false)) )
         {
           if(( millis() - codenum) > 1000 ) //Print Temp Reading every 1 second while heating up.
           {
         int t= code_value() ;
         switch(t)
         {
-          case 0: autoretract_enabled=false;retracted=false;break;
-          case 1: autoretract_enabled=true;retracted=false;break;
+          case 0: 
+          {
+            autoretract_enabled=false;
+            retracted[0]=false;
+            #if EXTRUDERS > 1
+              retracted[1]=false;
+            #endif
+            #if EXTRUDERS > 2
+              retracted[2]=false;
+            #endif
+          }break;
+          case 1: 
+          {
+            autoretract_enabled=true;
+            retracted[0]=false;
+            #if EXTRUDERS > 1
+              retracted[1]=false;
+            #endif
+            #if EXTRUDERS > 2
+              retracted[2]=false;
+            #endif
+          }break;
           default:
             SERIAL_ECHO_START;
             SERIAL_ECHOPGM(MSG_UNKNOWN_COMMAND);

Marlin/language.h

 	#define MSG_KILLED "KILLED. "
 	#define MSG_STOPPED "STOPPED. "
 	#define MSG_CONTROL_RETRACT  "Retract mm"
+	#define MSG_CONTROL_RETRACT_SWAP  "Swap Re.mm"
 	#define MSG_CONTROL_RETRACTF "Retract  V"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Hop mm"
 	#define MSG_CONTROL_RETRACT_RECOVER "UnRet +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "S UnRet+mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "UnRet  V"
 	#define MSG_AUTORETRACT "AutoRetr."
 	#define MSG_FILAMENTCHANGE "Change filament"
 	#define MSG_STOPPED "Zatrzymany. "
 	#define MSG_STEPPER_RELEASED "Zwolniony."
 	#define MSG_CONTROL_RETRACT  "Wycofaj mm"
+	#define MSG_CONTROL_RETRACT_SWAP  "Z Wycof. mm"
 	#define MSG_CONTROL_RETRACTF "Wycofaj  V"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Skok Z mm:"
 	#define MSG_CONTROL_RETRACT_RECOVER "Cof. wycof. +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Z Cof. wyc. +mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "Cof. wycof.  V"
 	#define MSG_AUTORETRACT "Auto. wycofanie"
 	#define MSG_FILAMENTCHANGE "Zmien filament"
 	#define MSG_STOPPED "STOPPE."
 	#define MSG_STEPPER_RELEASED "RELACHE."
 	#define MSG_CONTROL_RETRACT "Retraction mm"
+	#define MSG_CONTROL_RETRACT_SWAP "Ech. Retr. mm"
 	#define MSG_CONTROL_RETRACTF "Retraction V"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Hop mm"
 	#define MSG_CONTROL_RETRACT_RECOVER "UnRet +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Ech. UnRet +mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "UnRet V"
 	#define MSG_AUTORETRACT "Retract. Auto."
 	#define MSG_FILAMENTCHANGE "Changer filament"
 	#define MSG_STOPPED          "GESTOPPT"
 	#define MSG_STEPPER_RELEASED "Stepper frei"
 	#define MSG_CONTROL_RETRACT  "Retract mm"
+	#define MSG_CONTROL_RETRACT_SWAP  "Wechs. Retract mm"
 	#define MSG_CONTROL_RETRACTF "Retract  V"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Hop mm"
 	#define MSG_CONTROL_RETRACT_RECOVER "UnRet +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Wechs. UnRet +mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "UnRet  V"
 	#define MSG_AUTORETRACT      "AutoRetr."
 	#define MSG_FILAMENTCHANGE "Filament wechseln"
 	#define MSG_KILLED "PARADA DE EMERG."
 	#define MSG_STOPPED "PARADA"
 	#define MSG_CONTROL_RETRACT  "Retraer mm"
+	#define MSG_CONTROL_RETRACT_SWAP  "Interc. Retraer mm"
 	#define MSG_CONTROL_RETRACTF "Retraer  V"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Levantar mm"
 	#define MSG_CONTROL_RETRACT_RECOVER "DesRet +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Interc. DesRet +mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "DesRet V"
 	#define MSG_AUTORETRACT "AutoRetr."
 	#define MSG_FILAMENTCHANGE "Cambiar filamento"
 	#define MSG_KILLED							"УБИТО."
 	#define MSG_STOPPED							"ОСТАНОВЛЕНО."
 	#define MSG_CONTROL_RETRACT					"Откат mm:"
+	#define MSG_CONTROL_RETRACT_SWAP				"своп Откат mm:"
 	#define MSG_CONTROL_RETRACTF				"Откат  V:"
 	#define MSG_CONTROL_RETRACT_ZLIFT			"Прыжок mm:"
 	#define MSG_CONTROL_RETRACT_RECOVER			"Возврат +mm:"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP		"своп Возврат +mm:"
 	#define MSG_CONTROL_RETRACT_RECOVERF		"Возврат  V:"
 	#define MSG_AUTORETRACT						"АвтоОткат:"
 	#define MSG_FILAMENTCHANGE 					"Change filament"
 	#define MSG_KILLED               "UCCISO. "
 	#define MSG_STOPPED              "ARRESTATO. "
 	#define MSG_CONTROL_RETRACT      "Ritrai mm"
+	#define MSG_CONTROL_RETRACT_SWAP "Scamb. Ritrai mm"
 	#define MSG_CONTROL_RETRACTF     "Ritrai  V"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Salta mm"
 	#define MSG_CONTROL_RETRACT_RECOVER "UnRet +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Scamb. UnRet +mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "UnRet  V"
 	#define MSG_AUTORETRACT          "AutoArretramento"
 	#define MSG_FILAMENTCHANGE       "Cambia filamento"
 	#define MSG_STOPPED "PARADA. "
 	#define MSG_STEPPER_RELEASED "Lancado."
 	#define MSG_CONTROL_RETRACT  " Retrair mm:"
+	#define MSG_CONTROL_RETRACT_SWAP  "Troca Retrair mm:"
 	#define MSG_CONTROL_RETRACTF " Retrair  V:"
 	#define MSG_CONTROL_RETRACT_ZLIFT " Levantar mm:"
 	#define MSG_CONTROL_RETRACT_RECOVER " DesRet +mm:"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Troca DesRet +mm:"
 	#define MSG_CONTROL_RETRACT_RECOVERF " DesRet  V:"
 	#define MSG_AUTORETRACT " AutoRetr.:"
 	#define MSG_FILAMENTCHANGE "Change filament"
 	#define MSG_KILLED "KILLED. "
 	#define MSG_STOPPED "STOPPED. "
 	#define MSG_CONTROL_RETRACT  "Veda mm"
+	#define MSG_CONTROL_RETRACT_SWAP  "Va. Veda mm"
 	#define MSG_CONTROL_RETRACTF "Veda V"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Z mm"
 	#define MSG_CONTROL_RETRACT_RECOVER "UnRet +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Va. UnRet +mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "UnRet  V"
 	#define MSG_AUTORETRACT "AutoVeto."
 	#define MSG_FILAMENTCHANGE "Change filament"
 	#define MSG_KILLED "ATURADA D'EMERCH."
 	#define MSG_STOPPED "ATURADA."
 	#define MSG_CONTROL_RETRACT  "Retraer mm"
+	#define MSG_CONTROL_RETRACT_SWAP  "Swap Retraer mm"
 	#define MSG_CONTROL_RETRACTF "Retraer  F"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Devantar mm"
 	#define MSG_CONTROL_RETRACT_RECOVER "DesRet +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Swap DesRet +mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "DesRet F"
 	#define MSG_AUTORETRACT "AutoRetr."
 	#define MSG_FILAMENTCHANGE "Cambear"
 	#define MSG_KILLED "AFGEBROKEN. "
 	#define MSG_STOPPED "GESTOPT. "
 	#define MSG_CONTROL_RETRACT  "Retract mm"
+	#define MSG_CONTROL_RETRACT_SWAP "Ruil Retract mm"
 	#define MSG_CONTROL_RETRACTF "Retract  F"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Hop mm"
 	#define MSG_CONTROL_RETRACT_RECOVER "UnRet +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Ruil UnRet +mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "UnRet  F"
 	#define MSG_AUTORETRACT "AutoRetr."
 	#define MSG_FILAMENTCHANGE "Verv. Filament"
 	#define MSG_KILLED "PARADA DE EMERG. "
 	#define MSG_STOPPED "ATURAT. "
 	#define MSG_CONTROL_RETRACT  "Retreure mm"
+	#define MSG_CONTROL_RETRACT_SWAP  "Swap Retreure mm"
 	#define MSG_CONTROL_RETRACTF "Retreure  F"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Aixecar mm"
 	#define MSG_CONTROL_RETRACT_RECOVER "DesRet +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Swap DesRet +mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "DesRet  F"
 	#define MSG_AUTORETRACT "AutoRetr."
 	#define MSG_FILAMENTCHANGE "Canviar filament"
 	#define MSG_KILLED "LARRIALDI GELDIA"
 	#define MSG_STOPPED "GELDITUTA. "
 	#define MSG_CONTROL_RETRACT  "Atzera egin mm"
+	#define MSG_CONTROL_RETRACT_SWAP  "Swap Atzera egin mm"
 	#define MSG_CONTROL_RETRACTF "Atzera egin V"
 	#define MSG_CONTROL_RETRACT_ZLIFT "Igo mm"
 	#define MSG_CONTROL_RETRACT_RECOVER "Atzera egin +mm"
+	#define MSG_CONTROL_RETRACT_RECOVER_SWAP "Swap Atzera egin +mm"
 	#define MSG_CONTROL_RETRACT_RECOVERF "Atzera egin V"
 	#define MSG_AUTORETRACT "Atzera egin"
 	#define MSG_FILAMENTCHANGE "Aldatu filament."

Marlin/temperature.cpp

   for(int e = 0; e < EXTRUDERS; e++) 
   {
 
+  #ifdef THERMAL_RUNAWAY_PROTECTION_PERIOD && THERMAL_RUNAWAY_PROTECTION_PERIOD > 0
+    thermal_runaway_protection(&thermal_runaway_state_machine[e], &thermal_runaway_timer[e], current_temperature[e], target_temperature[e], e, THERMAL_RUNAWAY_PROTECTION_PERIOD, THERMAL_RUNAWAY_PROTECTION_HYSTERESIS);
+  #endif
+
   #ifdef PIDTEMP
     pid_input = current_temperature[e];
 
 
   #if TEMP_SENSOR_BED != 0
   
+    #ifdef THERMAL_RUNAWAY_PROTECTION_PERIOD && THERMAL_RUNAWAY_PROTECTION_PERIOD > 0
+      thermal_runaway_protection(&thermal_runaway_bed_state_machine, &thermal_runaway_bed_timer, current_temperature_bed, target_temperature_bed, 9, THERMAL_RUNAWAY_PROTECTION_BED_PERIOD, THERMAL_RUNAWAY_PROTECTION_BED_HYSTERESIS);
+    #endif
+
   #ifdef PIDTEMPBED
     pid_input = current_temperature_bed;
 
 #endif 
 }
 
+#ifdef THERMAL_RUNAWAY_PROTECTION_PERIOD && THERMAL_RUNAWAY_PROTECTION_PERIOD > 0
+void thermal_runaway_protection(int *state, unsigned long *timer, float temperature, float target_temperature, int heater_id, int period_seconds, int hysteresis_degc)
+{
+/*
+      SERIAL_ECHO_START;
+      SERIAL_ECHO("Thermal Thermal Runaway Running. Heater ID:");
+      SERIAL_ECHO(heater_id);
+      SERIAL_ECHO(" ;  State:");
+      SERIAL_ECHO(*state);
+      SERIAL_ECHO(" ;  Timer:");
+      SERIAL_ECHO(*timer);
+      SERIAL_ECHO(" ;  Temperature:");
+      SERIAL_ECHO(temperature);
+      SERIAL_ECHO(" ;  Target Temp:");
+      SERIAL_ECHO(target_temperature);
+      SERIAL_ECHOLN("");    
+*/
+  if ((target_temperature == 0) || thermal_runaway)
+  {
+    *state = 0;
+    *timer = 0;
+    return;
+  }
+  switch (*state)
+  {
+    case 0: // "Heater Inactive" state
+      if (target_temperature > 0) *state = 1;
+      break;
+    case 1: // "First Heating" state
+      if (temperature >= target_temperature) *state = 2;
+      break;
+    case 2: // "Temperature Stable" state
+      if (temperature >= (target_temperature - hysteresis_degc))
+      {
+        *timer = millis();
+      } 
+      else if ( (millis() - *timer) > period_seconds*1000)
+      {
+        SERIAL_ERROR_START;
+        SERIAL_ERRORLNPGM("Thermal Runaway, system stopped! Heater_ID: ");
+        SERIAL_ERRORLN((int)heater_id);
+        LCD_ALERTMESSAGEPGM("THERMAL RUNAWAY");
+        thermal_runaway = true;
+        while(1)
+        {
+          disable_heater();
+          disable_x();
+          disable_y();
+          disable_z();
+          disable_e0();
+          disable_e1();
+          disable_e2();
+          manage_heater();
+          lcd_update();
+        }
+      }
+      break;
+  }
+}
+#endif
 
 void disable_heater()
 {

Marlin/temperature.h

 void setWatch();
 void updatePID();
 
+#ifdef THERMAL_RUNAWAY_PROTECTION_PERIOD && THERMAL_RUNAWAY_PROTECTION_PERIOD > 0
+void thermal_runaway_protection(int *state, unsigned long *timer, float temperature, float target_temperature, int heater_id, int period_seconds, int hysteresis_degc);
+static int thermal_runaway_state_machine[3]; // = {0,0,0};
+static unsigned long thermal_runaway_timer[3]; // = {0,0,0};
+static bool thermal_runaway = false;
+  #if TEMP_SENSOR_BED != 0
+    static int thermal_runaway_bed_state_machine;
+    static unsigned long thermal_runaway_bed_timer;
+  #endif
+#endif
+
 FORCE_INLINE void autotempShutdown(){
  #ifdef AUTOTEMP
  if(autotemp_enabled)

Marlin/ultralcd.h

   extern int absPreheatHotendTemp;
   extern int absPreheatHPBTemp;
   extern int absPreheatFanSpeed;
+  
+  extern bool cancel_heatup;
     
   void lcd_buzz(long duration,uint16_t freq);
   bool lcd_clicked();