piecjedenc

//Cezary Zaprawa
//Jedna dioda swieci 500/2000ms
//Częstotliwość: 1MHz

#include <avr/io.h>
#include <avr/interrupt.h>

ISR(TIMER1_COMPA_vect) {
    PORTA &= ~(1 << 0);
}
ISR(TIMER1_OVF_vect) {
    PORTA |= (1 << 0);
}
void init() {
    cli();
    DDRA |= (1 << 0);
    PORTA |= (1 << 0);
    OCR1A = 7813;
    ICR1 = 31250;
    TCCR1A |= (1 << WGM11);
    TCCR1B |= (1 << WGM12) | (1 << WGM13);
    TIMSK |= (1 << OCIE1A) | (1 << TOIE1);
    TCCR1B |= (1 << CS11) | (1 << CS10);
    sei();
}
int main(void) {
    init();
    while(1) {
        asm("nop");
    }
}