SafetyTimer disabled

Watchdog disabled
watchdog.cpp and watchdog.h source code removed (using directly <avr/wdt.h>)

Firmware/Configuration_adv.h

@@ -284,16 +284,6 @@
   //#define PROGRESS_MSG_ONCE
 #endif
 
-// The hardware watchdog should reset the microcontroller disabling all outputs, in case the firmware gets stuck and doesn't do temperature regulation.
-//#define USE_WATCHDOG
-
-#ifdef USE_WATCHDOG
-// If you have a watchdog reboot in an ArduinoMega2560 then the device will hang forever, as a watchdog reset will leave the watchdog on.
-// The "WATCHDOG_RESET_MANUAL" goes around this by not using the hardware reset.
-//  However, THIS FEATURE IS UNSAFE!, as it will only work if interrupts are disabled. And the code could hang in an interrupt routine with interrupts disabled.
-//#define WATCHDOG_RESET_MANUAL
-#endif
-
 // Enable the option to stop SD printing when hitting and endstops, needs to be enabled from the LCD menu when this option is enabled.
 //#define ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
 

Firmware/Configuration_prusa.h

@@ -170,7 +170,8 @@ const bool Z_MIN_ENDSTOP_INVERTING = false; // set to true to invert the logic o
 
 #define PAT9125 //!< Filament sensor
 #define FANCHECK
-#define SAFETYTIMER
+//#define WATCHDOG
+//#define SAFETYTIMER
 
 
 /*------------------------------------

Firmware/Marlin_main.cpp

@@ -49,7 +49,6 @@
 #include "temperature.h"
 #include "motion_control.h"
 #include "cardreader.h"
-#include "watchdog.h"
 #include "ConfigurationStore.h"
 #include "language.h"
 #include "pins_arduino.h"
@@ -1042,7 +1041,6 @@ void setup()
 	lcd_splash(); // we need to do this again, because tp_init() kills lcd
 
 	plan_init();  // Initialize planner;
-	watchdog_init();
 
 	factory_reset();
 
@@ -1307,7 +1305,9 @@ void setup()
 #endif //UVLO_SUPPORT
 
   KEEPALIVE_STATE(NOT_BUSY);
+#ifdef WATCHDOG
   wdt_enable(WDTO_4S);
+#endif //WATCHDOG
 }
 
 #ifdef PAT9125
@@ -6901,7 +6901,9 @@ void kill(const char *full_screen_message, unsigned char id)
   suicide();
   while(1)
   {
-	wdt_reset();
+#ifdef WATCHDOG
+    wdt_reset();
+#endif //WATCHDOG
 	  /* Intentionally left empty */
 	
   } // Wait for reset

Firmware/temperature.cpp

@@ -32,7 +32,6 @@
 #include "Marlin.h"
 #include "ultralcd.h"
 #include "temperature.h"
-#include "watchdog.h"
 #include "cardreader.h"
 
 #include "Sd2PinMap.h"
@@ -262,7 +261,9 @@ unsigned long watchmillis[EXTRUDERS] = ARRAY_BY_EXTRUDERS(0,0,0);
 
 
  for(;;) {
-	wdt_reset();
+#ifdef WATCHDOG
+    wdt_reset();
+#endif //WATCHDOG
     if(temp_meas_ready == true) { // temp sample ready
       updateTemperaturesFromRawValues();
 
@@ -576,7 +577,9 @@ void checkExtruderAutoFans()
 
 void manage_heater()
 {
-	wdt_reset();
+#ifdef WATCHDOG
+    wdt_reset();
+#endif //WATCHDOG
 
   float pid_input;
   float pid_output;
@@ -960,7 +963,9 @@ static void updateTemperaturesFromRawValues()
     #endif
 
     //Reset the watchdog after we know we have a temperature measurement.
-    watchdog_reset();
+#ifdef WATCHDOG
+    wdt_reset();
+#endif //WATCHDOG
 
     CRITICAL_SECTION_START;
     temp_meas_ready = false;

Firmware/watchdog.cpp

@@ -1,56 +0,0 @@
-#include "Marlin.h"
-
-#ifdef USE_WATCHDOG
-#include <avr/wdt.h>
-
-#include "watchdog.h"
-#include "ultralcd.h"
-
-//===========================================================================
-//=============================private variables  ============================
-//===========================================================================
-
-//===========================================================================
-//=============================functinos         ============================
-//===========================================================================
-
-
-/// intialise watch dog with a 4 sec interrupt time
-void watchdog_init()
-{
-#ifdef WATCHDOG_RESET_MANUAL
-    //We enable the watchdog timer, but only for the interrupt.
-    //Take care, as this requires the correct order of operation, with interrupts disabled. See the datasheet of any AVR chip for details.
-    wdt_reset();
-    _WD_CONTROL_REG = _BV(_WD_CHANGE_BIT) | _BV(WDE);
-    _WD_CONTROL_REG = _BV(WDIE) | WDTO_4S;
-#else
-    wdt_enable(WDTO_4S);
-#endif
-}
-
-/// reset watchdog. MUST be called every 1s after init or avr will reset.
-void watchdog_reset() 
-{
-    wdt_reset();
-}
-
-//===========================================================================
-//=============================ISR               ============================
-//===========================================================================
-
-//Watchdog timer interrupt, called if main program blocks >1sec and manual reset is enabled.
-#ifdef WATCHDOG_RESET_MANUAL
-ISR(WDT_vect)
-{ 
-    //TODO: This message gets overwritten by the kill() call
-    LCD_ALERTMESSAGEPGM("ERR:Please Reset");//16 characters so it fits on a 16x2 display
-    lcd_update();
-    SERIAL_ERROR_START;
-    SERIAL_ERRORLNPGM("Something is wrong, please turn off the printer.");
-    kill(); //kill blocks
-    while(1); //wait for user or serial reset
-}
-#endif//RESET_MANUAL
-
-#endif//USE_WATCHDOG

Firmware/watchdog.h

@@ -1,17 +0,0 @@
-#ifndef WATCHDOG_H
-#define WATCHDOG_H
-
-#include "Marlin.h"
-
-#ifdef USE_WATCHDOG
-  // initialize watch dog with a 1 sec interrupt time
-  void watchdog_init();
-  // pad the dog/reset watchdog. MUST be called at least every second after the first watchdog_init or AVR will go into emergency procedures..
-  void watchdog_reset();
-#else
-  //If we do not have a watchdog, then we can have empty functions which are optimized away.
-  FORCE_INLINE void watchdog_init() {};
-  FORCE_INLINE void watchdog_reset() {};
-#endif
-
-#endif