Question

我正在运行Windows 7x64，连接到RFIDeas USB阅读器（部件号RDR-80582AKU）。使用设备管理器，我发现其供应商和产品ID为HID \ VID_0C27＆PID_3BFA＆REV_1623。我的.NEt应用程序引用了Libusdotnet，LibUsb.Common，还安装了libusb-win32-driver。运行时，它显示“找不到设备”，我进行了搜索，但未发现与我的问题有关的任何内容，以下是我的代码。 TIA。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using LibUsbDotNet;
using LibUsbDotNet.Info;
using LibUsbDotNet.Main;
using System.Collections.ObjectModel;

namespace RFIDeas_cs
{
class Program
{
    public static UsbDevice MyUsbDevice;

    #region SET YOUR USB Vendor and Product ID!

    public static UsbDeviceFinder MyUsbFinder = new UsbDeviceFinder(0x0c27, 0x3bfa);

    #endregion

    static void Main(string[] args)
    {

        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();
        }
    }
    }
}

Answer 1

我通过启用过滤器解决了我的问题。下载并运行安装程序LibUsbDotNet_Setup.2.2.8.exe 为您的输入设备选择合适的过滤器，在我的情况下是供应商ID 0c27

libusbdotnet找不到RFIDeas USB HID设备

1 个答案: