/*
 * PWM.c
 *
 * Created: 11.4.2014 7:55:30
 *  Author: maticpi
 */ 
#include <avr/io.h>


void Init();

int main(void)
{
	Init();

	OCR2A=128;	//set duty cycle to 50% (LCD back light at 1/2 power)
	while(1)
	{
	}
}

void Init()
{
	//IO port
	PORTA=0x08; //0000 1000
	PORTB=0x00; //0000 0000
	PORTC=0x3E; //0011 1110
	PORTD=0x7D; //0111 1101
	//1-output, 0-input
	DDRA=0xF0; //1111 0000
	DDRB=0xFF; //1111 1111
	DDRC=0xC1; //1100 0001
	DDRD=0x82; //1000 0010
	
//Init timer0
	TCCR2A=(2<<COM2A0) | (3<<WGM20);	//Set OC2A pin (PD7) to normal PWM output mode (non-inverting), select Timer Mode Fast PWM with top at 0xFF
	TCCR2B=(1<<CS20);					//Set prescaler to 1:1 (max speed)
	OCR2A=0;							//set duty cycle to 0 (LCD back light off)
}