上位机问题

2万 · 2011-11-23 12:47

我在使用cypress的68013的开发板。上位机使用官网提供的基于C#的类库，正在学习相关的例子程序。可是一开始就碰到了棘手的问题，请看下面的代码

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);
      }
…………

执行
usbDevices  = new USBDeviceList(CyConst.DEVICES_CYUSB, evHandler);
始终不成功