/*
 * MIC-Week1.c
 *
 * Created: 2-2-2016 11:48:44
 * Author : kenny
 */ 

#define F_CPU 8000000UL

#include <avr/io.h>
#include <util/delay.h>

/******************************************************************/
void wait( int ms )
/* 
short:			Busy wait number of millisecs
inputs:			int ms (Number of millisecs to busy wait)
outputs:	
notes:			Busy wait, not very accurate. Make sure (external)
				clock value is set. This is used by _delay_ms inside
				util/delay.h
Version :    	DMK, Initial code
*******************************************************************/
{
	for (int i=0; i<ms; i++)
	{
		_delay_ms( 1 );		// library function (max 30 ms at 8MHz)
	}
}

int main(void)
{
	DDRD = 0b11111111;			// All pins PORTD are set to output

	while (1)
	{
		opgave1( );
	}

	return 1;
}

void opgave1(void)
{
	PORTD = 0b10000000;
	wait( 500 );
	PORTD = 0b01000000;
	wait ( 500 );
}