void usb_halt(HANDLE hf,byte half_data)
{
  _VENDOR_REQUEST_IN vreq;
  vreq.bRequest = 0xA0;
  vreq.wValue = 0xE600;
  vreq.wIndex = 0x00;
  vreq.wLength = 0x01;
  vreq.bData = half_data;
  vreq.direction = 0x00;
  ret = DeviceIoControl (hf,
                         Get_Ctl_Code((0x800)+5,m_buffer,a_any),
                         &vreq,
                         sizeof(VENDOR_REQUEST_IN),
                         NULL,
                         0,
                         &nbyte,
                         NULL);
  if(ret==False)
    {
      ShowMessage("i8051 halt err.\n");
    }
}

void usb_dwnload(int len)
{
  ret = DeviceIoControl (hf,                         // hDevice: THandle
                         IOCTL_Ezusb_ANCHOR_DOWNLOAD,// dwIoControlCode: DWORD
                         &mass_data,                      // lpInBuffer: Pointer
                         len,                        // nInBufferSize: DWORD
                         NULL,                        // lpOutBuffer: Pointer
                         0,                          // nOutBufferSize: DWORD
                         &nbyte,                      // var lpBytesReturned: DWORD
                         NULL);                        // lpOverlapped: POverlapped
   if (ret==false)
    {
     ShowMessage("LoadError");
    }
 }