extern volatile uint16_t LED_red_bright;			//Werden jeweils aus der Main geändert
extern volatile uint16_t LED_green_bright;
extern volatile uint16_t LED_blue_bright;


void timerconfig(void)
{
	//Timer0 config																//8bit Timer

	TCCR0A |= (1<<WGM01);															//CTC-Mode
	TCCR0B |= (1<<CS00);															//Prescale -> 0
	TIMSK0 |= (1<<OCIE0A);															//Interrupt ein bei CompareMatch
	OCR0A = 40;						//Eine Verringerung führt zu keinem besseren Ergebnis				//Vergleichswert
}


ISR (SIG_OUTPUT_COMPARE0A)
{
	static uint16_t PWM_zaehler = 0;

	if (PWM_zaehler <= 1024)
	{
		PWM_zaehler++;
	}
	else
	{
		PWM_zaehler = 0;
	}


	//RED PWM
	if ((PWM_zaehler < LED_red_bright) || (LED_red_bright == 1024))
	{
		PORTB &= ~(1<<PB2);														//LED an
	}
	else
	{
		PORTB |= (1<<PB2);														//LED aus
	}


	//GREEN PWM
	if ((PWM_zaehler < LED_green_bright) || (LED_green_bright == 1024))
	{
		PORTA &= ~(1<<PA7);														//LED an
	}
	else
	{
		PORTA |= (1<<PA7);														//LED aus
	}


	//BLUE PWM
	if ((PWM_zaehler < LED_blue_bright) || (LED_blue_bright == 1024))
	{
		PORTA &= ~(1<<PA3);														//LED an
	}
	else
	{
		PORTA |= (1<<PA3);														//LED aus
	}
}