XIO2001 I2C control under windows

Hello Alan,

Unfortunately we have no source code examples we can provide; although I just found a code snippet that I hope can help to clarify the process in case you have any doubts.

Example: Write a value of 0x55 to address 0x00 on an I2C EEPROM which slave address is 0xA0

I2C Write Byte

// Write the address to register offset 0xB1

WritePciByte(Local_Device.BUS_NUMBER, Local_Device.DEVICE_NUMBER, 0, 0xB1, 0x00)

// Write the data to register offset 0xB0

WritePciByte(Local_Device.BUS_NUMBER, Local_Device.DEVICE_NUMBER, 0, 0xB0, 0x55)

// Write the device’s slave address and write command to register offset 0xB2

WritePciByte(Local_Device.BUS_NUMBER, Local_Device.DEVICE_NUMBER, 0, 0xB2, 0xA0)

                Where

• WritePciByte(PCI Bus Number, PCI Device Number, PCI Function Number, Register Offset, Data);

Example:  Read back the data written on the previous example

I2C Read Byte

                Byte ROM_Busy_Counter = 0

                // Write the address to register offset 0xB1

               WritePciByte(Local_Device.BUS_NUMBER, Local_Device.DEVICE_NUMBER, 0, 0xB1, 0x00)

                // Write the device’s slave address and read command to register offset 0xB2

                WritePciByte(Local_Device.BUS_NUMBER, Local_Device.DEVICE_NUMBER, 0, 0xB2, 0xA1)

                // Wait for EEPROM to come ready

                Do

{

ROM_Busy_Counter ++

                                If ( ROM_Busy_Counter >= 50 )

                                {

                                                Print("EEPROM BUSY TIMEOUT REACHED!");

                                                break;

                                }

} while ( REQBUSY() == true )

                // Check for errors

                If (SB_ERR() )

                    // There was a read error. Data is not valid.

                    Data_Returned = -1

                Else

                    Data_Returned = ReadPciByte(Local_Device.BUS_NUMBER, Local_Device.DEVICE_NUMBER, 0, 0xB0)

                Where

• ReadPciByte(PCI Bus Number, PCI Device Number, PCI Function Number, Register Offset);

• Bool REQBUSY()

                {

                                Byte Busy_Register = ReadPciByte(Local_Device.BUS_NUMBER, Local_Device.DEVICE_NUMBER, 0, 0xB3)

                                If ( (Busy_Register && 0x20) == 0x20 )

                                {

                                                // EEPROM busy. Wait a bit.

                                                mS_Wait(0.4)

                                                return True

}

                                else

                                                return False                                       

                }

• Bool SB_ERR()

                {

                                Byte Error_Register = ReadPciByte(Local_Device.BUS_NUMBER, Local_Device.DEVICE_NUMBER, 0, 0xB3)

                                If ( (Error_Register && 0x02) == 0x02 )                                                                  

                                                return True

                                else

                                                return False                                       

                }

Thanks for the snippet - I will pass it on to our softies..