/*
 * AB1_board_input.c
 *
 * Created: 10.01.2015 04:34:47
 *  Author: ab

Input Test.


 */ 


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

void init_ioss(void)
{
	DDRB |= (1<<PB1) | (1<<PB2); // PWM Kanal 

	DDRC |= (1<<PC0)|(1<<PC3)|(1<<PC4)|(1<<PC5); // PC4&5 für LEDs
	PORTC &= ~((1<<PC0)|(1<<PC3)|(1<<PC5)); // LEDs aus
	PORTC |= (1<<PC4);

	DDRD &= ~((1<<PD0)|(1<<PD1)|(1<<PD2)|(1<<PD3));
	PORTD |= (1<<PD0)|(1<<PD1)|(1<<PD2)|(1<<PD3);
}

void init_pwm(void)
{
	OCR1A=0x00; //duty cycle = OCR2/256*100%
	TCCR1A=(1<<WGM11) | (1<<WGM10) | (1<<COM1A1); TCCR1B = (1<<CS10); 
}

int8_t rampe(int8_t sp_akt, int8_t sp_ziel)
{
	int8_t countss;
	if (sp_akt>=sp_ziel)
	{
		countss = sp_akt;
		while (countss>sp_ziel)
		{
			countss--;
			OCR1A =countss;
			_delay_ms(50);
		}
	}
	else
	{
		countss = sp_akt;
		while (countss<sp_ziel)
		{
			countss++;
			OCR1A = countss;
			_delay_ms(50);
		}
	}
	return countss;
}

int main(void)
{
	int8_t v_min = 0;
	int8_t v_max = 255;
	int8_t v_aktuell = v_min;
	int8_t posss =0,

	init_ioss();
	init_pwm();
	while(1)
	{
		OCR1A = v_aktuell;
		if (!(PIND & (1<<PIND0)))
		{
			v_aktuell = rampe(v_aktuell,0);
			PORTC ^= (1<<PC5);
			PORTC ^= (1<<PC4);
			_delay_ms(250);
			v_aktuell = rampe(v_aktuell,v_max);
		}

		if (!(PIND & (1<<PIND1)))
		{
			PORTC ^= (1<<PC3); //toggle
			_delay_ms(250);
			v_aktuell = rampe(v_aktuell,0);
			
		}
		if (!(PIND & (1<<PIND2)))
		{
			PORTC ^= (1<<PC0); //toggle
			if (posss<254) posss++;
		}
		if (!(PIND & (1<<PIND3)))
		{
			PORTC ^= (1<<PC0); //toggle
			if (posss>0) posss--;
		}
	} //while 1
} // main