#ifdef USE_WATCHDOG #include "watchdog.h" #include <avr/wdt.h> #include <avr/interrupt.h> //=========================================================================== //=============================private variables ============================ //=========================================================================== static volatile uint8_t timeout_seconds=0; void(* ctrlaltdelete) (void) = 0; //does not work on my atmega2560 //=========================================================================== //=============================functinos ============================ //=========================================================================== /// intialise watch dog with a 1 sec interrupt time void wd_init() { WDTCSR |= (1<<WDCE )|(1<<WDE ); //allow changes WDTCSR = (1<<WDCE )|(1<<WDE )|(1<<WDP3 )|(1<<WDP0); // Reset after 8 sec. // WDTCSR = (1<<WDIF)|(1<<WDIE)| (1<<WDCE )|(1<<WDE )| (1<<WDP3) | (1<<WDP0); } /// reset watchdog. MUST be called every 1s after init or avr will reset. void wd_reset() { wdt_reset(); } //=========================================================================== //=============================ISR ============================ //=========================================================================== //Watchdog timer interrupt, called if main program blocks >1sec ISR(WDT_vect) { if(timeout_seconds++ >= WATCHDOG_TIMEOUT) { #ifdef RESET_MANUAL LCD_MESSAGEPGM("Please Reset!"); LCD_STATUS; SERIAL_ERROR_START; SERIAL_ERRORLNPGM("Something is wrong, please turn off the printer."); #else LCD_MESSAGEPGM("Timeout, resetting!"); LCD_STATUS; #endif //disable watchdog, it will survife reboot. WDTCSR |= (1<<WDCE) | (1<<WDE); WDTCSR = 0; #ifdef RESET_MANUAL kill(); //kill blocks while(1); //wait for user or serial reset #else ctrlaltdelete(); #endif } } #endif /* USE_WATCHDOG */