Files

watchdog.cpp
#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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