multypal adc readind with hitech

[sahu]

whats wrong with me about multipal adc reading with hi tech (9.82)?

void InitADC(unsigned char Channel)
{
   ANSEL  = 0x10;    // Clear Pin selection bits
   ANSEL  |= Channel;  // Select Channel
   TRISA  = 0x07;  // AN0 TO AN 2 input, rest all output
   TRISA |= Channel;    // Make selected channel pins input

   ADCON0 = 0x81;      // Turn on the A/D Converter
   CMCON  = 0x07;      // Shut off the Comparator, so that pins are available for ADC
   VRCON  = 0x00;    // Shut off the Voltage Reference for Comparator
}

unsigned int GetADCValue(unsigned char Channel)
{
    ADCON0 &= 0xf3;      // Clear Channel selection bits

    switch(Channel)
    {
        case ANS0:    ADCON0 |= 0x00; break;      // Select AN0 pin as ADC input
        case ANS1:    ADCON0 |= 0x04; break;      // Select AN1 pin as ADC input
        case ANS2:    ADCON0 |= 0x08; break;      // Select AN2 pin as ADC input
        case ANS3:    ADCON0 |= 0x0c; break;      // Select AN4 pin as ADC input

        default:    return 0;                     //Return error, wrong channel selected
    }
  
    __delay_ms(10);      // Time for Acqusition capacitor to charge up and show correct value

    GO_nDONE  = 1;         // Enable Go/Done

    while(GO_nDONE);     //wait for conversion completion

    return ((ADRESH<<8)+ADRESL);   // Return 10 bit ADC value
}

found error as

ADC_Functions.c; 40.10 constant expression required

 

[Ian Rogers]

1) What pic chip are you using and 2) why are you still using HiTech... Don't get me wrong, Hitech is a good compiler but it isn't supported anymore... The latest models are available with XC8 If you download it from microchip you can use it in lite mode....