ATmega88 @ 8MHz Phasenkorrektur

phasecorrect.c

/* pwm_phasecorrect_01.c ATmega88 @ 8MHz */
#include <avr/io.h>
 
int main(void)
{
    DDRB |= (1<<PB1); // OC1A = Ausgang
    ICR1 = 1000;        // ICR = Top Wert bei 1000
    OCR1A = 750;        // Compare Match für OC1A bei 500
     
    // Mode 10: PWM, Phase Correct, Prescaler = 8, Clear OC1A on compare match
    TCCR1A = (1 << COM1A1) + (1 << WGM11);
    TCCR1B = (1 << WGM13) + (1 << CS11);
     
    while(1)
    {
        asm ("NOP");    // Nichts tun
    }
}