/* 
 * File:   main.c
 * Author: Sebastian H. Gabrielli
 *
 * Created on March 6, 2024, 12:34 PM
 */
#include "header.h"
#define F_CPU 4000000UL
#define RTC_PERIOD (511)
#define DELAY_TIME 1000
#define USART3_BAUD_RATE(BAUD_RATE) ((float) (64*F_CPU /(16*(float)BAUD_RATE) )+0.5)
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <string.h>
#include <stdbool.h>
#include <stdio.h>


uint16_t adcVal;

void sensor_init(void)
{	
	PORTE.DIRSET = PIN0_bm;
	PORTE.DIRSET = PIN1_bm;
	PORTE.DIRSET = PIN2_bm;
	
}

void USART3_init(void)
{
	PORTB.DIRCLR &= ~PIN1_bm;
	PORTB.DIRSET |= PIN0_bm;
	PORTB.DIRCLR = PIN2_bm;
	USART3.CTRLB |= USART_RXEN_bm | USART_TXEN_bm; /* Enable both TX and
	RX */
}

void ADC0_init(void)
{
	
	ADC0.CTRLC = ADC_PRESC_DIV4_gc;
	VREF.ADC0REF = VREF_REFSEL_VDD_gc; /* Internal reference */
	ADC0.CTRLA = ADC_ENABLE_bm /* ADC Enable: enabled */
	| ADC_RESSEL_10BIT_gc; /* 10-bit mode */
	/* Select ADC channel */
	ADC0.MUXPOS = ADC_MUXPOS_AIN6_gc;
}

void USART3_sendChar(char c)
{
	while (!(USART3.STATUS & USART_DREIF_bm))
	{
		;
	}
	USART3.TXDATAL = c;
}

void USART3_sendString(char *str)
{
	for(size_t i = 0; i < strlen(str); i++)
	{
		USART3_sendChar(str[i]);
	}
}

static int USART3_printChar(char c, FILE *stream)
{
	USART3_sendChar(c);
	return 0;
}

uint16_t ADC0_read(void)
{
	/* Start ADC conversion */
	ADC0.COMMAND = ADC_STCONV_bm;
	/* Wait until ADC conversion done */
	while ( !(ADC0.INTFLAGS & ADC_RESRDY_bm) )
	{
		;
	}
	/* Clear the interrupt flag by writing 1: */
	ADC0.INTFLAGS = ADC_RESRDY_bm;
	return ADC0.RES;
}

bool ADC0_conversionDone(void)
{
	return (ADC0.INTFLAGS & ADC_RESRDY_bm);
}


static FILE USART_stream = FDEV_SETUP_STREAM(USART3_printChar, NULL, _FDEV_SETUP_WRITE);

int teller = 100;
int main(void)
{	sensor_init();
	ADC0_init();
	USART3_init();
	stdout = &USART_stream;
	
	while (1)
	{	
			if (ADC0_conversionDone())
			{
			adcVal = ADC0_read();
			printf("%d \n",adcVal);
			}
		}
	
	}