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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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