如何用C#开发EZ-USB

如何用C#开发EZ-USB，本人有一段代码，但调试时总是不识别设备，求各位大侠指教。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using CyUSB;
using System.Threading; 
namespace CSharpUSBTest {
    public partial class Form1 : Form {
        App_PnP_Callback evHandler;
        CyUSBDevice loopDevice = null;
        USBDeviceList usbDevices = null;
        CyBulkEndPoint inEndpoint = null;
        CyBulkEndPoint outEndpoint = null;        Thread tXfers;
        bool bRunning = false;        int value;
        long outCount, inCount;        const int XFERSIZE = 256;
        byte[] outData = new byte[XFERSIZE];
        byte[] inData = new byte[XFERSIZE];        // These 2 needed for TransfersThread to update the UI 
        delegate void UpdateUICallback();
        UpdateUICallback updateUI;
        public Form1() {
            InitializeComponent();            // Setup the callback routine for updating the UI 
            updateUI = new UpdateUICallback(StatusUpdate);            // Setup PnP event handling 
            evHandler = new App_PnP_Callback(PnP_Event_Handler);            // Create a list of CYUSB devices 
            usbDevices = new USBDeviceList(CyConst.DEVICES_CYUSB, evHandler);            setDevice();
        }        public void setDevice() {
            if (usbDevices.Count > 0)
                loopDevice = usbDevices[0x0547, 0x0080] as CyUSBDevice;            StartBtn.Enabled = (loopDevice != null);            if (loopDevice != null)
                Text = loopDevice.FriendlyName;
            else
                Text = "Bulkloop - no device";            // Set the in and out endpoints per the selected radio buttons. 
            EptPair1Btn_Click(this, null);
        }        public void PnP_Event_Handler(IntPtr pnpEvent, IntPtr hRemovedDevice) {
            if (pnpEvent.Equals(CyConst.DBT_DEVICEREMOVECOMPLETE)) {
                usbDevices.Remove(hRemovedDevice);
                //loopDevice = null; 
                setDevice();
            }            if (pnpEvent.Equals(CyConst.DBT_DEVICEARRIVAL)) {
                usbDevices.Add();
                setDevice();
            }
        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e) {
            // If close was selected while running the loopback, shut it down. 
            if (bRunning)
                StartBtn_Click(this, null);            if (usbDevices != null) usbDevices.Dispose();
        }        private void EptPair1Btn_Click(object sender, EventArgs e) {
            if (loopDevice != null) {
                if (EptPair1Btn.Checked) {
                    outEndpoint = loopDevice.EndPointOf(0x02) as CyBulkEndPoint;
                    inEndpoint = loopDevice.EndPointOf(0x86) as CyBulkEndPoint;
                } else {
                    outEndpoint = loopDevice.EndPointOf(0x04) as CyBulkEndPoint;
                    inEndpoint = loopDevice.EndPointOf(0x88) as CyBulkEndPoint;
                }                outEndpoint.TimeOut = 1000;
                inEndpoint.TimeOut = 1000;
            }
        }        private void SetOutputData() {            if (ConstByteBtn.Checked) {
                for (int i = 0; i < XFERSIZE; i++)
                    outData[i] = (byte)value;
            }            if (RandomByteBtn.Checked) {
                Random r = new Random(value);
                r.NextBytes(outData);
            }            if (IncrByteBtn.Checked) {
                for (int i = 0; i < XFERSIZE; i++)
                    outData[i] = (byte)value++;
            }            if (IncrWordBtn.Checked) {
                for (int i = 0; i < XFERSIZE; i += 4) {
                    outData[i] = (byte)(value >> 24);
                    outData[i + 1] = (byte)(value >> 16);
                    outData[i + 2] = (byte)(value >> 8);
                    outData[i + 3] = (byte)value;                    value++;
                }
            }
        }        private void StartBtn_Click(object sender, EventArgs e) {
            if (!bRunning) {
                value = Convert.ToInt32(StartValBox.Text);
                outCount = 0;
                inCount = 0;                bRunning = true;
                StartBtn.Text = "Stop";
                StartBtn.BackColor = Color.Pink;                tXfers = new Thread(new ThreadStart(TransfersThread));
                tXfers.IsBackground = true;
                tXfers.Priority = ThreadPriority.Highest;
                tXfers.Start();
            } else {
                bRunning = false;
                StartBtn.Text = "Start";
                StartBtn.BackColor = Color.Aquamarine;                if (tXfers == null) return;                if (tXfers.IsAlive) {
                    tXfers.Abort();
                    tXfers.Join();
                    tXfers = null;
                }
            }
        }        public void StatusUpdate() {
            BytesOutLabel.Text = outCount.ToString();
            BytesInLabel.Text = inCount.ToString();
            Refresh();            StartBtn.Text = bRunning ? "Stop" : "Start";
            StartBtn.BackColor = bRunning ? Color.Pink : Color.Aquamarine;
        }
        // This method runs in a separate thread. 
        public void TransfersThread() {
            int xferLen = XFERSIZE;            bool bResult = true;            // Loop stops if either an IN or OUT transfer fails 
            for (; bRunning && bResult; ) {
                SetOutputData();                xferLen = XFERSIZE;
                bResult = outEndpoint.XferData(ref outData, ref xferLen);
                outCount += xferLen;                if (bResult) {
                    bResult = inEndpoint.XferData(ref inData, ref xferLen);
                    inCount += xferLen;
                }                // Call StatusUpdate() in the main thread 
                this.Invoke(updateUI);
            }            bRunning = false;            // Call StatusUpdate() in the main thread 
            this.Invoke(updateUI);
        }    } }