/*
 * adc_driver.c
 *
 * Created: 09.09.2019 15:38:28
 *  Author: chris
 */

#include "header/initialize.h"
#include "header/adc_driver.h"

#include <stdint.h>
#include <avr/interrupt.h>



uint8_t percentage_from_8bit(uint8_t input_value)		//Used if a percentage is more intuitive than 0-255. Delete if not needed.
{
	uint8_t percentage = 100*(input_value)/255;
	return percentage;
}

char joystick_direction(uint8_t input_value,char axis)
{

		if ((input_value < 124) & (axis == 'x')) {
			return 'L';
		}
		else if((input_value > 130) & (axis == 'x')) {
			return 'R';
		}
		else if((input_value < 124) & (axis == 'y')) {
			return 'D';
		}
		else if((input_value > 130) & (axis == 'y')) {
			return 'U';
		}
		else if((input_value <= 130) & (input_value >= 124)) {
			return 'N';
		}
		else {
			return 'E';
		}
}

uint8_t adc_read(uint8_t channel)	//Value is returned through an ISR
{
	volatile char *adc_address = 0x1400;

	switch (channel)
	{

		case 1 :
			adc_address[0] = 0b00000100;	//Select channel 1
			break;
		case 2:
			adc_address[0] = 0b00000101;	//Select channel 2
			break;
		case 3:
			adc_address[0] = 0b00000110;	//Select channel 3
			break;
		case 4:
			adc_address[0] = 0b00000111;	//Select channel 4
			break;
		default:
			printf("Invalid channel\r\n");
	}

	while(PIND &= (1 << PD3));

	return adc_address[0];
}