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- #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
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