原创 EZ-USB 上位机传输

应用程序
1.打开设备，并设置端点指针   
    do {
        USBDevice->Open(d); // Open automatically calls Close() if necessary
        usb_id = d;
        vID = USBDevice->VendorID;
        pID = USBDevice->ProductID;
        d++;
    } while ((d < devices ) && (vID != mVID) && (pID != mPID));
   
    if(usb_id == devices)
        AfxMessageBox("没有找到设备！",0);
    else
    {
        int eptCount = USBDevice->EndPointCount();
        for (int i=1; i<eptCount; i++)
        {
            bool bIn = ((USBDevice->EndPoints->Address & 0x80) == 0x80);
            bool bBulk = (USBDevice->EndPoints->Attributes == 2);
            if (bBulk && bIn) BulkInEpt = (CCyBulkEndPoint *) USBDevice->EndPoints;
            if (bBulk && !bIn) BulkOutEpt = (CCyBulkEndPoint *) USBDevice->EndPoints;
        }
    }
2.BULK发送
    OVERLAPPED outOvLap;
    outOvLap.hEvent = CreateEvent(NULL, false, false, "CYUSB_OUT");
   
    for(int i=0; i<512; i++)
        outBuf = i;

    LONG length = 512;
    UCHAR *outContext = BulkOutEpt->BeginDataXfer(outBuf, length, &outOvLap);

    BulkOutEpt->WaitForXfer(&outOvLap,100);//100ms
   
    bool success;
    success = BulkOutEpt->FinishDataXfer(outBuf, length, &outOvLap, outContext);
    CloseHandle(outOvLap.hEvent);
3.BULK接收
    OVERLAPPED inOvLap;
    inOvLap.hEvent = CreateEvent(NULL, false, false, "CYUSB_IN");

    ZeroMemory(inBuf, 512);
   
    LONG length = 512;
    UCHAR *inContext = BulkInEpt->BeginDataXfer(inBuf, length, &inOvLap);

    BulkInEpt->WaitForXfer(&inOvLap,100); //100mS
    bool success;
    success = BulkInEpt->FinishDataXfer(inBuf, length, &inOvLap,inContext);
    CloseHandle(inOvLap.hEvent);