#include<htc.h>
#include<pic.h>
#define _XTAL_FREQ 8000000
void ADC_Init()
{
ADCON0 = 0x41; //ADC Module Turned ON and Clock is selected
ADCON1 = 0xC0; //All pins as Analog Input
//With reference voltages VDD and VSS
}
unsigned int ADC_Read(unsigned char channel)
{
if(channel > 7) //If Invalid channel selected
return 0; //Return 0
ADCON0 &= 0xC5; //Clearing the Channel Selection Bits
ADCON0 |= channel<<3; //Setting the required Bits
__delay_ms(2); //Acquisition time to charge hold capacitor
GO_nDONE = 1; //Initializes A/D Conversion
while(GO_nDONE); //Wait for A/D Conversion to complete
return ((ADRESH<<8)+ADRESL); //Returns Result
}
void main()
{
unsigned int a;
TRISB = 0x00; //PORTB as output
TRISC = 0x00; //PORTC as output
TRISA = 0xFF; //PORTA as input
ADC_Init(); //Initializes ADC Module
do
{
a = ADC_Read(4); //Reading Analog Channel 0
PORTB = a; //Lower 8 bits to PORTB
PORTC = a>>8; //Higher 2 bits to PORTC
__delay_ms(100); //Delay
}while(1); //Infinite Loop
}
