Filip Zavadil - policejní blikač bez delay

/*
 * M32-FZavadil-blikac.c
 *
 * Created: 6. 4. 2020 22:17:55
 * Author : martin
 *
 * Ledky na PB0 a PB1
 * Takt Atmegy32A je na 16MHz, s nižším taktem upravit hodnotu OCR1A na nižší hodnotu
 */

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

ISR(TIMER1_COMPA_vect)
{
    static uint8_t cas=0;
    cas++;
    if (cas==1 || cas==3) PORTB|=(1<<PB0); else PORTB&=~(1<<PB0);
    if (cas==5 || cas==7) PORTB|=(1<<PB1); else PORTB&=~(1<<PB1);
    if (cas>9) cas=0;
}

int main(void)
{
    DDRB|=(1<<PB1)|(1<<PB0);
    TCCR1B |= (1<<WGM12)|(1<<CS12);     // CTC + /1024
    OCR1A = 5000;
    TIMSK|=(1<<OCIE1A);
    sei();
    /* Replace with your application code */
    while (1)
    {
    }
}