Problem when read data from USB

Hello All!

  I am new to libusb and this community. I am using windows-backend and

created a small test app with below code. But I get the following error

Always , My error is "IoTimedOur. No more bytes" or
"Win32Error:Win32Error:No more bytes" when I plug other USB

 

            public static UsbDeviceFinder MyUsbFinder = new
UsbDeviceFinder(0x058F, 0x6387);

public static void Main(string[] args)

        {

            UsbRegDeviceList allDevices = UsbDevice.AllDevices;

            ErrorCode ec = ErrorCode.None;

 

            try

            {

                // Find and open the usb device.

                MyUsbDevice = UsbDevice.OpenUsbDevice(MyUsbFinder);

 

                // If the device is open and ready

                if (MyUsbDevice == null) throw new Exception("Device Not
Found.");

 

                // If this is a "whole" usb device (libusb-win32, linux
libusb-1.0)

                // it exposes an IUsbDevice interface. If not (WinUSB) the 

                // 'wholeUsbDevice' variable will be null indicating this is


                // an interface of a device; it does not require or support 

                // configuration and interface selection.

                IUsbDevice wholeUsbDevice = MyUsbDevice as IUsbDevice;

                if (!ReferenceEquals(wholeUsbDevice, null))

                {

                    // This is a "whole" USB device. Before it can be used, 

                    // the desired configuration and interface must be
selected.

 

                    // Select config #1

                    wholeUsbDevice.SetConfiguration(1);

 

                    // Claim interface #0.

                    wholeUsbDevice.ClaimInterface(0);

                }

 

                // open read endpoint 1.

                UsbEndpointReader reader =
MyUsbDevice.OpenEndpointReader(ReadEndpointID.Ep01);

 

 

                byte[] readBuffer = new byte[1024];

                while (ec == ErrorCode.None)

                {

                    int bytesRead;

 

                    // If the device hasn't sent data in the last 5 seconds,

                    // a timeout error (ec = IoTimedOut) will occur. 

                    ec = reader.Read(readBuffer, 5000, out bytesRead);

 

                    if (bytesRead == 0) throw new
Exception(string.Format("{0}:No more bytes!", ec));

                    Console.WriteLine("{0} bytes read", bytesRead);

 

                    // Write that output to the console.

                    Console.Write(Encoding.Default.GetString(readBuffer, 0,
bytesRead));

                }

 

                Console.WriteLine("\r\nDone!\r\n");

            }

            catch (Exception ex)

            {

                Console.WriteLine();

                Console.WriteLine((ec != ErrorCode.None ? ec + ":" :
String.Empty) + ex.Message);

            }

            finally

            {

                if (MyUsbDevice != null)

                {

                    if (MyUsbDevice.IsOpen)

                    {

                        // If this is a "whole" usb device (libusb-win32,
linux libusb-1.0)

                        // it exposes an IUsbDevice interface. If not
(WinUSB) the 

                        // 'wholeUsbDevice' variable will be null indicating
this is 

                        // an interface of a device; it does not require or
support 

                        // configuration and interface selection.

                        IUsbDevice wholeUsbDevice = MyUsbDevice as
IUsbDevice;

                        if (!ReferenceEquals(wholeUsbDevice, null))

                        {

                            // Release interface #0.

                            wholeUsbDevice.ReleaseInterface(0);

                        }

 

                        MyUsbDevice.Close();

                    }

                    MyUsbDevice = null;

 

                    // Free usb resources

                    UsbDevice.Exit();

 

                }

 

                // Wait for user input..

                Console.ReadKey();

            }

        }

Can someone please tell me what is that I am doing wrong here.
Thanks,
AnTrung139.

 

 

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