#include <avr/sleep.h>
#include <avr/interrupt.h>
#define BODS 7 //BOD Sleep bit in MCUCR
#define BODSE 2 //BOD Sleep enable bit in MCUCR
uint8_t mcucr1, mcucr2;
int led0= 0;
int led1 = 1;
int lcount = 0;
int dimmer = 255 ;
void goToSleep(void) {
// GIMSK |= _BV(INT0); //enable INT0
// MCUCR &= ~(_BV(ISC01) | _BV(ISC00)); //INT0 on low level
ACSR |= _BV(ACD); //disable the analog comparator
ADCSRA &= ~_BV(ADEN); //disable ADC
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
sleep_enable();
//turn off the brown-out detector.
//must have an ATtiny45 or ATtiny85 rev C or later for software to be able to disable the BOD.
//current while sleeping will be <0.5uA if BOD is disabled, <25uA if not.
cli();
mcucr1 = MCUCR | _BV(BODS) | _BV(BODSE); //turn off the brown-out detector
mcucr2 = mcucr1 & ~_BV(BODSE);
MCUCR = mcucr1;
MCUCR = mcucr2;
sei(); //ensure interrupts enabled so we can wake up again
sleep_cpu(); //go to sleep
cli(); //wake up here, disable interrupts
// GIMSK = 0x00; //disable INT0
sleep_disable();
sei(); //enable interrupts again (but INT0 is disabled from above)
}
void setup() {
pinMode(led0, OUTPUT);
pinMode(led1, OUTPUT);
}
void loop() {
lcount += 1;
analogWrite(0 , dimmer);
analogWrite(1 , dimmer);
delay( 700 );
dimmer = ( dimmer - 1 ) ;
if (lcount > 250) { goToSleep(); }
}
Der Sleepcode ist nicht von mir, sondern nur von mir angepasst. Das Orginal findet ihr hier: https://gist.github.com/JChristensen/5616922
