def send(self, command):
'''
Send a command (report) to the USB device. The method returns True if
the command was sent and understood.
:param command: A command in the format <key>=<value><newline>, e.g.
'red=on\n'.
'''
if self._usb_transfer_type == usb_transfer_types.RAW:
if not self._device_is_open():
return False
data = command + '\0' * (self._device.get_packet_size() -
len(command))
self._logger.debug('Sending data (%u bytes): %s',
len(data),
binascii.b2a_hex(data))
try:
self._device.send(data)
data = self._device.receive()
self._logger.debug('Received data (%u bytes): %s',
len(data),
binascii.b2a_hex(data))
return utils.strip(data) == _ACK
except IOError:
return False
elif self._usb_transfer_type == usb_transfer_types.CONTROL:
self._device.send(command)
def poll(self):
'''
Poll the device.
'''
self._device.send(parser.get_challenge_request())
r = self._device.receive()
self._logger.debug('\'{0}\''.format(utils.strip(r)))
assert(parser.is_challenge_response(r))