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