Analog_to_Digital_Converter_Using_LCD_Display

/*
 * File:   main.c
 * Author: Roniere
 *
 * Created on 28 de Novembro de 2016, 23:40
 */

#include <p18f4550.h>
#include <delays.h>
#include <adc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "biblioteca_lcd_2x16.h"
#include "config_PIC18F4550.h"

#define LED_green  LATBbits.LATB0
#define LED_red    LATBbits.LATB1
#define LED_yellow LATBbits.LATB2
#define LED_blue   LATBbits.LATB3

unsigned buffer [16];
float voltage_value;
float temp_value;
float temp;

float voltage_convert(float converter_value)
{
    return(converter_value*5000)/1023;
}

float temp_convert(float temp_value)
{
    return temp_value/2;
}

unsigned int channel_filter()
{
    unsigned int filter_count;
    unsigned long channel_value = 0;

    for(filter_count = 0;filter_count < 256; filter_count++)
    {
        ConvertADC();
        while(BusyADC());
        channel_value += ReadADC();
    }
    return(channel_value >> 8);
}

void main(void)
{
    unsigned int conv_outcome;

    OpenADC(ADC_FOSC_32                 // Fosc = 10 MHz. Tad = 32/20M = 1,6 us
        &ADC_RIGHT_JUST                 // Justified outcome to the right
        &ADC_2_TAD,                     // Sets the Automatic Aquisition Time (2&Tad = 3,2 us)
        ADC_CH0                         // Selects the channel 0
        &ADC_INT_OFF                    // Disabled interruption
        &ADC_VREFPLUS_VDD               // Vref+ = Vcc
        &ADC_VREFMINUS_VSS,             // Vref- = Vss
        ADC_1ANA);                      // Enables only channel AN0

    Delay10TCYx(5);
    ADCON1bits.PCFG = 0b1101;
    TRISAbits.TRISA0 = 1;
    TRISBbits.TRISB0 = 0;
    TRISBbits.TRISB1 = 0;
    TRISBbits.TRISB2 = 0;
    TRISBbits.TRISB3 = 0;
    TRISD = 0x00;
    PORTD = 0x00;

    lcd_inicia(0x28,0x0f,0x06);
    lcd_LD_cursor(0);

    while(1)
    {
        SetChanADC(ADC_CH0);
        Delay10TCYx(5);
        ConvertADC();
        while(BusyADC());
        conv_outcome = channel_filter();
        voltage_value = voltage_convert(conv_outcome);

        lcd_posicao(1,1);
        sprintf(buffer,"Pot: %04ld mV ",(long)voltage_value);
        lcd_LD_cursor(0);
        imprime_buffer_lcd(buffer,16);
        Delay10TCYx(100);

        SetChanADC(ADC_CH1);
        Delay10TCYx(5);
        ConvertADC();
        while(BusyADC());
        temp_value = channel_filter();//channel_filter;
        temp = temp_convert(temp_value);

        lcd_posicao(2,1);
        sprintf(buffer,"Temp: %02ld C ",(long)temp);
        lcd_LD_cursor(0);
        imprime_buffer_lcd(buffer,16);
        Delay10TCYx(100);

        if(voltage_value >= 2000)
            LED_green = 1;
        else
            LED_green = 0;

        if (temp >= 50)
            LED_red = 1;
        else
            LED_red = 0;

        if (temp >= 30 && temp < 50)
            LED_yellow = 1;
        else
            LED_yellow = 0;

        if (temp < 0)
            LED_blue = 1;
        else
            LED_blue = 0;

        Delay10TCYx(10000);
        //lcd_LD_cursor(0);
    }
    return;
}