/*
 * tp8.c
 *
 * Created: 30/03/2021 14:10:10
 * Author : yboujon1
 */ 

#include <avr/io.h>
#define F_CPU 3686400
#include <util/delay.h>
void pwm0_init(void);
void pwm0_setalpha(float percent);

int main(void)
{
    pwm0_init();
	pwm0_setalpha(25);
	int i;
    while (1) 
    {
		//rien
    };
}

void pwm0_init(void){
	TCCR0|=(1<<WGM00)|(1<<CS00)|(1<<COM01);//mode PWM, divisé par 1, non-inverting
	DDRB|=(1<<PB3);//PB3 donc OC0 en sortie	
}

void pwm0_setalpha(float percent){
	OCR0=percent*2.56;	//on fait apha/100*256 comme expliqué precedemment
}