any sample program (HTC pro) for ADC in pic16f877a

#include    <pic.h>
#include    "adc.h"


void
adc_read(unsigned char channel)
{

    ADCON0 = (channel << 3) + 0xC1;        // enable ADC, RC osc.
    ADGO = 1;
    while(ADGO)
        continue;    // wait for conversion complete
}

main()
{

    PORTA = 0;
    CMCON0 = 7;                 //  Turn off Comparators
    ANSEL = 1;                  //  Just RA0 is an Analog Input

    ADCON0 = 0b00000001;        //  Turn on the ADC
                                //   Bit 7 - Left Justified Sample
                                //   Bit 6 - Use VDD
                                //   Bit 4:2 - Channel 0
                                //   Bit 1 - Do not Start
                                //   Bit 0 - Turn on ADC
    ADCON1 = 0b00010000;        //  Selemct the Clock as Fosc/8

    while(1 == 1)               //  Loop Forever
    {
        for (i = 0; i < 8; i++ )
        {                       //  Loop through Each of the 8 LEDS
            for (j = 0; j < Dlay; j++);  //  Display "On" Delay Loop
            if ((ADCValue & (1 << i)) == 0)
                PORTA = NOTPORTA[i];
            else
                PORTA = PORTAValue[i];
            TRISA = TRISAValue[i];
        }  //  rof
        switch (ADCState)       //  ADC State Machine
        {
            case 0:             //  Finished, Start Next Sample
                GODONE = 1;
                ADCState++;
                break;
            case 1:             //  Wait for ADC to complete
                if (!GODONE)
                    ADCState++; //  Sample Finished
                break;
            case 2:             //  Save Sample Value in "ADCValue" 
                ADCValue = ADRESH;
                ADCState = 0;
                break;
        }  // hctiws
    }  //  elihw
}  //  End