Eprom Access Functions.c

// External Eprom Access. Jamie Balfour. Dec 2002.

// No Liability Accepted.



#include "I2C Low Level.h"

#include "Eprom Functions.h"





unsigned char RetrieveData( unsigned char ControlByte, unsigned char HighByte, unsigned char LowByte )

{

    unsigned char required_data=0, test=1;

    while( test )

    {

        SendStart();

        test=SendDeviceAddress( ControlByte, WRITE );		/* Wait for eprom to signal it is ready */

    }

    SendData(HighByte);

    SendData(LowByte);

    Restart();

    SendDeviceAddress( ControlByte, READ );

    required_data = GetData();

    SendStop();

    return required_data;

}



void ByteWrite( unsigned char ControlByte, unsigned char HighByte, unsigned char LowByte, unsigned char DataByte )

{

    unsigned char required_data=0, test=1;

    while( test )

    {

        SendStart();

        test=SendDeviceAddress( ControlByte, WRITE );		/* Wait for eprom to signal it is ready */

    }

    SendData(HighByte);

    SendData(LowByte);

    SendData(DataByte);

    SendStop();

}