#define _XTAL_FREQ 8000000

#define RS RD2
#define EN RD3
#define D4 RD4
#define D5 RD5
#define D6 RD6
#define D7 RD7

#include <xc.h>
#include "lcd.h";
#include <stdio.h>

// BEGIN CONFIG
#pragma config FOSC = HS // Oscillator Selection bits (HS oscillator)
#pragma config WDTE = OFF // Watchdog Timer Enable bit (WDT enabled)
#pragma config PWRTE = OFF // Power-up Timer Enable bit (PWRT disabled)
#pragma config BOREN = ON // Brown-out Reset Enable bit (BOR enabled)
#pragma config LVP = OFF // Low-Voltage (Single-Supply) In-Circuit Serial Programming Enable bit (RB3 is digital I/O, HV on MCLR must be used for programming)
#pragma config CPD = OFF // Data EEPROM Memory Code Protection bit (Data EEPROM code protection off)
#pragma config WRT = OFF // Flash Program Memory Write Enable bits (Write protection off; all program memory may be written to by EECON control)
#pragma config CP = OFF // Flash Program Memory Code Protection bit (Code protection off)
//END CONFIG

unsigned int ADC_Read(unsigned int channel)
{
  if(channel > 7)              //Channel range is 0 ~ 7
    return 0;

  // clear channel bits
 ADCON0bits.CHS0 = 0;
 ADCON0bits.CHS1 = 0;
 ADCON0bits.CHS2 = 0;

  ADCON0 |= channel<<3;        //Setting channel selection bits
  __delay_ms(2);               //Acquisition time to charge hold capacitor
  GO_nDONE = 1;                //Initializes A/D conversion
  while(GO_nDONE);             //Waiting for conversion to complete
  return ((ADRESH<<8)+ADRESL); //Return result
}


int main()
{
    TRISA = 0xFF;                 //Analog pins as Input

    ADCON0 = 0x81;
    ADCON1 = 0b10000000;                       //All pins are analog + internal reference.
    unsigned int a;
    unsigned int reading;
    float final_value;
    char display_value[16];
    TRISD = 0x00;
    Lcd_Init();
    Lcd_Clear();
    while(1)
    {




       Lcd_Clear();

        reading = ADC_Read(0);
        final_value = (reading/1023.0)*5.0;

        sprintf(display_value, "reading = %f", final_value);
        Lcd_Set_Cursor(1,1);
        Lcd_Write_String(display_value);


        __delay_ms(1000);

    }
    return 0;
}