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#include <avr/sleep.h> | |
#include <avr/wdt.h> | |
void setup() { | |
pinMode(4, OUTPUT); | |
} | |
void water(int ms) { | |
digitalWrite(4, HIGH); | |
delay(ms); | |
digitalWrite(4, LOW); | |
set_sleep_mode(SLEEP_MODE_PWR_DOWN); | |
} | |
void loop() { | |
for (int i = 0; i < 10800; i++) { | |
sleep_enable(); | |
ADCSRA &= ~(1<<ADEN); | |
setup_watchdog(9); | |
sleep_mode(); | |
ADCSRA |= (1<<ADEN); | |
} | |
water(3000); | |
} | |
ISR(WDT_vect) {} // Wake up. | |
//0=16ms, 1=32ms, 2=64ms, 3=128ms, 4=250ms, 5=500ms, 6=1sec, 7=2sec, 8=4sec, 9=8sec | |
void setup_watchdog(int timerPrescaler) { | |
if (timerPrescaler > 9 ) timerPrescaler = 9; //Limit incoming amount to legal settings | |
byte bb = timerPrescaler & 7; | |
if (timerPrescaler > 7) bb |= (1<<5); //Set the special 5th bit if necessary | |
//This order of commands is important and cannot be combined | |
MCUSR &= ~(1<<WDRF); //Clear the watch dog reset | |
WDTCR |= (1<<WDCE) | (1<<WDE); //Set WD_change enable, set WD enable | |
WDTCR = bb; //Set new watchdog timeout value | |
WDTCR |= _BV(WDIE); //Set the interrupt enable, this will keep unit from resetting after each int | |
} |
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This is for ATTINY 85. Deep sleep code copied from somewhere, credit to those folks.