def get_register(self):
if register.iterated:
data_len = chr((register.byte_size * self.loop_count) & 0xff)
else:
data_len = chr(register.byte_size & 0xff)
tran_id = self._transaction.next()
message = make_message_header(
self.source, self.destination,
1, tran_id
) + str(register.byte_location) + str(data_len)
check = self._checksum(message)
msg = message.replace("\x10", "\x10\x10")
packet = "\x10\x02%s\x10\x03%s" % (msg, check)
msg_back = None
with self.ser as port:
if not port.isOpen():
port.open()
msg_back = do_command(port, packet)
if not msg_back:
raise AttributeError("Cannot read attribute from controller")
returned_data = disect_packet(msg_back)
clean_data = returned_data.replace("\x10\x10", "\x10")
# actually marshall
return register.to_python(clean_data)
def set_register(self, value):
# XXX: Needs testing
data = register.from_python(value)
message = make_message_header(
self.source, self.destination,
8, self._transaction.next()
) + register.byte_location + data
check = self._checksum(message)
msg = message.replace("\x10", "\x10\x10")
packet = "\x10\x02%s\x10\x03%s" % (msg, check)
msg_back = None
with self.ser as port:
if not port.isOpen():
port.open()
msg_back = do_command(port, packet)
if not msg_back:
raise AttributeError("Cannot write attribute to controller.")