/*
 * adc.c
 *
 * Created: 09/12/2021 16:31:16
 *  Author: n0x
 */ 

#include "adc.h"

void 
adc_init(void) 
{
	ADMUX = (1<<REFS1)|
			(0<<REFS0)|		/* Set Voltage reference to 2.56V */
			(0<<ADLAR)		/* Set ADLAR to 0 to not left adjust the presentation of the conversion result */
	;
	
	ADCSRA = (1<<ADEN)|		/* Enable ADC */
			 (0<<ADATE)|	/* Disable the ADC auto trigger */
			 (1<<ADIE)|		/* Enable the ADC interrupt */
			 (1<<ADPS2)|
			 (1<<ADPS1)|
			 (1<<ADPS0)		/* Set ADC Prescaler to 128 */
	;
}

volatile int done = 1;

/* ADC 1 */
uint16_t 
adc_get_poti(void) 
{		
	uint16_t adc;
	ADCSRA &= ~(1<<ADIE);	/* Disable interrupt */
		
	ADMUX |= (1<<MUX0);		/* Set ADMUX to access ADC channel 1 */
	ADCSRA |= (1<<ADSC);	/* Start the conversion */

	done = 0;				/* reset the done flag to false */
	
	while(done == 0);		/* Wait till conversion completes */
	
	adc = ADC;

	ADCSRA |= (1<<ADIE);	/* Enable the interrupt again */

	return adc;
}


/* ADC 0 */
uint16_t 
adc_get_LM35(void) 
{
	uint16_t adc;
	ADCSRA &= ~(1<<ADIE);	/* Disable interrupt */
	
	ADMUX &= (0<<MUX0);		/* Set ADMUX to access ADC channel 0 */
	ADCSRA |= (1<<ADSC);	/* Start the conversion */
	
	done = 0;				/* reset the done flag to false */
	
	while(done == 0);		/* Wait till conversion completes */

	adc = ADC;

	ADCSRA |= (1<<ADIE);	/* Enable the interrupt again */

	return adc;
}

ISR(ADC_vect){
	done = 1;				/* set the done flag to true */
}