FTD2XX_NET.FTDI.ReadFT2232EEPROM C# (CSharp) Method

        public FT_STATUS ReadFT2232EEPROM(FT2232_EEPROM_STRUCTURE ee2232)
        {
            // Initialise ftStatus to something other than FT_OK
            FT_STATUS ftStatus = FT_STATUS.FT_OTHER_ERROR;
            FT_ERROR ftErrorCondition = FT_ERROR.FT_NO_ERROR;

            // If the DLL hasn't been loaded, just return here
            if (hFTD2XXDLL == IntPtr.Zero)
                return ftStatus;

            // Check for our required function pointers being set up
            if (pFT_EE_Read != IntPtr.Zero)
            {
                tFT_EE_Read FT_EE_Read = (tFT_EE_Read)Marshal.GetDelegateForFunctionPointer(pFT_EE_Read, typeof(tFT_EE_Read));

                if (ftHandle != IntPtr.Zero)
                {
                    FT_DEVICE DeviceType = FT_DEVICE.FT_DEVICE_UNKNOWN;
                    // Check that it is an FT2232 that we are trying to read
                    GetDeviceType(ref DeviceType);
                    if (DeviceType != FT_DEVICE.FT_DEVICE_2232)
                    {
                        // If it is not, throw an exception
                        ftErrorCondition = FT_ERROR.FT_INCORRECT_DEVICE;
                        ErrorHandler(ftStatus, ftErrorCondition);
                    }

                    FT_PROGRAM_DATA eedata = new FT_PROGRAM_DATA();

                    // Set up structure headers
                    eedata.Signature1 = 0x00000000;
                    eedata.Signature2 = 0xFFFFFFFF;
                    eedata.Version = 2;

                    // Allocate space from unmanaged heap
                    eedata.Manufacturer = Marshal.AllocHGlobal(32);
                    eedata.ManufacturerID = Marshal.AllocHGlobal(16);
                    eedata.Description = Marshal.AllocHGlobal(64);
                    eedata.SerialNumber = Marshal.AllocHGlobal(16);

                    // Call FT_EE_Read
                    ftStatus = FT_EE_Read(ftHandle, eedata);

                    // Retrieve string values
                    ee2232.Manufacturer = Marshal.PtrToStringAnsi(eedata.Manufacturer);
                    ee2232.ManufacturerID = Marshal.PtrToStringAnsi(eedata.ManufacturerID);
                    ee2232.Description = Marshal.PtrToStringAnsi(eedata.Description);
                    ee2232.SerialNumber = Marshal.PtrToStringAnsi(eedata.SerialNumber);

                    // Free unmanaged buffers
                    Marshal.FreeHGlobal(eedata.Manufacturer);
                    Marshal.FreeHGlobal(eedata.ManufacturerID);
                    Marshal.FreeHGlobal(eedata.Description);
                    Marshal.FreeHGlobal(eedata.SerialNumber);

                    // Map non-string elements to structure to be returned
                    // Standard elements
                    ee2232.VendorID = eedata.VendorID;
                    ee2232.ProductID = eedata.ProductID;
                    ee2232.MaxPower = eedata.MaxPower;
                    ee2232.SelfPowered = Convert.ToBoolean(eedata.SelfPowered);
                    ee2232.RemoteWakeup = Convert.ToBoolean(eedata.RemoteWakeup);
                    // 2232 specific fields
                    ee2232.PullDownEnable = Convert.ToBoolean(eedata.PullDownEnable5);
                    ee2232.SerNumEnable = Convert.ToBoolean(eedata.SerNumEnable5);
                    ee2232.USBVersionEnable = Convert.ToBoolean(eedata.USBVersionEnable5);
                    ee2232.USBVersion = eedata.USBVersion5;
                    ee2232.AIsHighCurrent = Convert.ToBoolean(eedata.AIsHighCurrent);
                    ee2232.BIsHighCurrent = Convert.ToBoolean(eedata.BIsHighCurrent);
                    ee2232.IFAIsFifo = Convert.ToBoolean(eedata.IFAIsFifo);
                    ee2232.IFAIsFifoTar = Convert.ToBoolean(eedata.IFAIsFifoTar);
                    ee2232.IFAIsFastSer = Convert.ToBoolean(eedata.IFAIsFastSer);
                    ee2232.AIsVCP = Convert.ToBoolean(eedata.AIsVCP);
                    ee2232.IFBIsFifo = Convert.ToBoolean(eedata.IFBIsFifo);
                    ee2232.IFBIsFifoTar = Convert.ToBoolean(eedata.IFBIsFifoTar);
                    ee2232.IFBIsFastSer = Convert.ToBoolean(eedata.IFBIsFastSer);
                    ee2232.BIsVCP = Convert.ToBoolean(eedata.BIsVCP);
                }
            }
            else
            {
                if (pFT_EE_Read == IntPtr.Zero)
                {
                    LogB.Debug("FTD2XX: Failed to load function FT_EE_Read.");
                }
            }
            return ftStatus;
        }