The same request is used for both sending and receiving data. Which operation is used depends on the endpoint number (>=0x80 are input endpoints, <0x80 are output). The operation returns the number of bytes read or written. | The same request is used for both sending and receiving data. Which operation is used depends on the endpoint number (>=0x80 are input endpoints, <0x80 are output). The operation returns the number of bytes read or written. |