Peter,

I wrote these functions for a PIC16F877 and Hi-Tech C which may
be helpful to you. Pretty simple and uncomplicated - one function
for reading a byte and one for writing a byte. They were written
following the procedure on the data sheet, have been tested in the
field and seem to work OK.

unsigned char eeread(unsigned char address){

        EEADR = address;        // Specify address to read
        EEPGD = 0;              // select EEPROM data memory
        RD = 1;                 // perform read
        return EEDATA;          // return the read data
}

void eewrite(unsigned char address, unsigned char data){

        EEADR = address;        // Specify address
        EEDATA = data;  // and data to write
        EEPGD = 0;              // select EEPROM data memory

        WREN=1;         // Enable writing

        GIE = 0;                // Disable interrupts
        EECON2 = 0x55;  // special code
        EECON2 = 0xAA;  // special code
        WR = 1;         // Begin write
        GIE = 1;                // Enable interrupts

        while(!EEIF);           // Wait for write complete
        EEIF=0;         // Clear write complete flag
        WREN=0;         // Disable writing
}


Peter Keller wrote:
> I would like to program the 256 bytes EEPROM using the CCS Compiler.
> Does anybody know how to code this ?
> Peter Keller

Brent Brown
Electronic Design Solutions
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Hamilton, New Zealand
Ph/fax: +64 7 849 0069
Mobile: 025 334 069
eMail:  brent.brown@clear.net.nz