ATmega-basic/Fast PWM.c at main · Abdansb/ATmega-basic · GitHub

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/*
 * Percobaan 1.c
 * Created: 15/09/2022 23.29.09
 * Author : Kelompok 1
 */
#define F_CPU 16000000L
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>

double duty = 50; // Deklarasi variabel duty tipe double

int main(void)
{
	DDRB = (1 << PORTB3); // PORT B3 sebagai output
	TCCR0 = (1 << WGM00)|(1 << WGM01)|(1 << COM01); // Mode fast PWM
	TIMSK = (1 << OCIE0); // Interrupt aktif

	//OCR0 = (duty/100)*255; // Menghitung nilai OCR

	sei(); // Global interrupt

	TCCR0 |= (1 << CS02)|(1 << CS00); // Prescaler 1024

    while (1)
    {
		_delay_ms(2000); // Tunda 2 detik
		duty++; // Increment 1
		if (duty > 100)
		{
			duty = 50;
		}
    }
}

ISR(TIMER0_COMP_vect) // Interrupt servis rutin timer 0
{
	OCR0 = (duty/100)*255; // Menghitung nilai OCR
}