Fast PWM Pulsweitenmodulation

fast-pwm-02.c

/* fast_pwm_02.c ATmega88 @ 1MHz */
#include <avr/io.h>
 
int main(void)
{
    DDRB |= (1<<PB1); // OC1A = output
    DDRB |= (1<<PB2); // OC1B = output
    OCR1A = 307;        // Compare match bei 307 = 30% Duty Cycle
    OCR1B = 716;        // Compare match bei 716 = 70% Duty Cycle
     
    // Lösche OC1A und OC1B bei einem Compare Match
    TCCR1A = (1 << COM1A1) + (1 << COM1B1) + (1 << WGM11) +(1 << WGM10);
     
    // Mode 7, Fast PWM 10-bit und Prescaler = 8
    TCCR1B = (1 << WGM12) +(1 << CS11);
     
    while(1)
    {
        asm ("NOP"); // Nichts tun
    }
}