def __init__(self, temperature_setting, status):
temperature_setting.register(self.update_temperature)
self._status = status
self._worker = SerialPortWorker(self.message_received)
self._worker.setDaemon(True)
self._worker.start()
self._waiting_for_answer_event = threading.Event()
self._answer_received_event = threading.Event()
self._answer = ''
class SerialPortManager:
def __init__(self, temperature_setting, status):
temperature_setting.register(self.update_temperature)
self._status = status
self._worker = SerialPortWorker(self.message_received)
self._worker.setDaemon(True)
self._worker.start()
self._waiting_for_answer_event = threading.Event()
self._answer_received_event = threading.Event()
self._answer = ''
# settings change callback
def update_temperature(self, temperature):
self.send_and_receive(TemperatureSetMessage(temperature))
def send_and_receive(self, message):
self._waiting_for_answer_event.set()
self._worker.add_message(message)
self._wait_for_answer(message)
self._waiting_for_answer_event.clear()
return message.translate_answer(self._return_and_clear_answer())
# received message callback
def message_received(self, message):
message = message.replace('\n', '')
if self._waiting_for_answer_event.is_set():
self._answer = message
self._answer_received_event.set()
else:
AsyncMessageHandler.handle_async_message(message)
def _wait_for_answer(self, message):
self._answer_received_event.wait()
while not message.isAnswer(self._answer):
AsyncMessageHandler.handle_async_message(self._answer)
self._answer_received_event.clear()
self._answer_received_event.wait()
def _return_and_clear_answer(self):
answer, self._answer = self._answer, ''
self._answer_received_event.clear()
return answer