mirror of
https://github.com/MarlinFirmware/Marlin.git
synced 2024-11-27 22:08:02 +00:00
54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
#include "Marlin.h"
|
|
|
|
#if ENABLED(USE_WATCHDOG)
|
|
#include <avr/wdt.h>
|
|
|
|
#include "watchdog.h"
|
|
#include "ultralcd.h"
|
|
|
|
//===========================================================================
|
|
//============================ private variables ============================
|
|
//===========================================================================
|
|
|
|
//===========================================================================
|
|
//================================ functions ================================
|
|
//===========================================================================
|
|
|
|
|
|
/// intialise watch dog with a 4 sec interrupt time
|
|
void watchdog_init()
|
|
{
|
|
#if ENABLED(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.
|
|
#if ENABLED(WATCHDOG_RESET_MANUAL)
|
|
ISR(WDT_vect)
|
|
{
|
|
SERIAL_ERROR_START;
|
|
SERIAL_ERRORLNPGM("Something is wrong, please turn off the printer.");
|
|
kill(PSTR("ERR:Please Reset")); //kill blocks //16 characters so it fits on a 16x2 display
|
|
while(1); //wait for user or serial reset
|
|
}
|
|
#endif//RESET_MANUAL
|
|
|
|
#endif//USE_WATCHDOG
|