//USB 接收到PC機下傳數據API說明
//在USB接收到PC機下傳數據時,將告訴APP層,usb 接收到了數據.函數如下:
//fuction : void APPUsbReceived
//description : tell app usb received data.when usb received data .should call it.

void APPUsbReceived();


//fuction : Bool APPGetUsbData(unsigned char *buffer,uchar *length)
//input   : buffer :output usb data buffer. length: usb data length.
//output  : when  get usb data successful,return 1.else return 0
//description : APP layer call this program .get usb data.usb should
//               fill buffer and length.
Bool APPGetUsbData(unsigned char *buffer,unsigned char *length);