return None

	def __del__(self):
		self._spi.close()

	def _debug(self, message):
		if 'debug_log_command' in self._config:
		#print("LT8900 DEBUG: " + message)
			self._config['debug_log_command'](message)
		return None

	def _reset_device(self):
		if self._config is not None:
			if self._config['reset_command'] is not None:
				return self._config['reset_command']()
		return None