transport.py 文件源码

def _PYUSB1_read(self, timeout):
        if self.usb_inp is not None:
            try:
                frame = self.usb_inp.read(300, timeout)
            except self.usb_core.USBError as error:
                if error.errno != errno.ETIMEDOUT:
                    log.error("{0!r}".format(error))
                raise error
            else:
                frame = bytearray(frame)
                log.debug("<<< " + str(frame).encode("hex"))
                return frame