transport.py 文件源码

def _PYUSB1_write(self, frame):
        if self.usb_out is not None:
            log.debug(">>> " + str(frame).encode("hex"))
            try:
                self.usb_out.write(frame)
                if len(frame) % self.usb_out.wMaxPacketSize == 0:
                    self.usb_out.write('') # end bulk transfer
            except self.usb_core.USBError as error:
                if error.errno != errno.ETIMEDOUT:
                    log.error("{0!r}".format(error))
                raise error