#define F_CPU 16000000UL
#include <avr/io.h>
#include <avr/interrupt.h>
volatile int zaehlerstand = 0;

void init (void)
{
	DDRB |= (1<<DDB1) | (1<<DDB2) | (1<<DDB3);// RGB auf Output setzen

	TCCR1A |= (1<<WGM10) | (1<<COM1A1) | (1<<COM1B1); // 8-bit Phase Correct PWM Modus Timer 1, CTC
	TCCR1B |= (1<<CS11); // Prescaler 8

	TCCR2A |= (1<<WGM20) | (1<<COM2A1); //PWM Phase Correct Timer 2, CTC
	TCCR2B |= (1<<CS21);// Prescaler 8

	TCCR0B |= (1<<CS02) | (1<<CS00); //Prescaler 1024
	TCNT0 = 134;  //Startwert

	TIMSK0 |= (1<<TOIE0); //Interrupt Lokal aktivieren

	sei(); //Global Interrupt aktivieren

}

int main (void)
{
	init ();
	while (1)
	{
		//Rot LED
		OCR1B = 0;
		OCR2A = 0;
		OCR1A = 0;
		zaehlerstand = 0;
		while (zaehlerstand <= 255)
		{
			OCR1A = zaehlerstand;
		}
		OCR1A = 0;

		//Warten 2s
		zaehlerstand = 0;
		while (zaehlerstand <= 255)
		{

		}

		//Grün LED
		zaehlerstand = 0;
		while (zaehlerstand <= 255)
		{
			OCR1B = zaehlerstand;
		}
		OCR1B = 0;

		//Warten 2s
		zaehlerstand = 0;
		while (zaehlerstand <= 255)
		{

		}

		//Blaue LED
		zaehlerstand = 0;
		while (zaehlerstand <= 255)
		{
			OCR2A = zaehlerstand;
		}
		OCR2A = 0;

		//Warten 2s
		zaehlerstand = 0;
		while (zaehlerstand <= 255)
		{

		}

		//Alle zusammen
		zaehlerstand = 0;
		while (zaehlerstand <=255)
		{
			OCR1A = zaehlerstand;
			OCR1B = zaehlerstand;
			OCR2A = zaehlerstand;
		}
		zaehlerstand = 0;
		while (zaehlerstand <=255)
		{
			OCR1A = 255-zaehlerstand;
			OCR1B = 255-zaehlerstand;
			OCR2A = 255-zaehlerstand;
		}

		OCR1B = 0;
		OCR2A = 0;
		OCR1A = 0;
		//Warten 2s
		zaehlerstand = 0;
		while (zaehlerstand <= 255)
		{

		}
	}


}

ISR (TIMER0_OVF_vect)
{
	TCNT0 = 134;
	zaehlerstand++;
}