Python LT8900 via SPI

			'syncword_len': [11, 12],
			'trailer_len': [8, 10],
			'packet_type': [6, 7],
			'fec_type': [4, 5],
			'br_clock_sel': [1, 3],
			'reserved_1': [0, 0]
		},
		{                    # 33
		{'name': "Unknown"}, # 33
		{'name': "Unknown"}, # 34
			'name': "vco_pa_delays",
			'vco_on_delay': [8, 15],
			'pa_off_delay': [6, 7],
			'pa_tx_delay': [0, 5]
		},
		{                    # 34
			'name': "tx_packet_delays",
			'packet_control_direct': [15, 15],
			'tx_cw_delay': [8, 14],
			'reserved_1': [6, 7],
			'tx_sw_on_delay': [0, 5]
		},
		{                    # 35
			'name': "chip_power",
			'power_down': [15, 15],
			'sleep_mode': [14, 14],
			'reserved_1': [13, 13],
			'br_clock_on_sleep': [12, 12],
			'rexmit_times': [8, 11],

		# Wait for buffer to empty
		# XXX: Untested
		while True:
			radio_status = self.get_register_bits('status')
			self.__debug("radio_status={}".format(radio_status))

			if radio_status['fifo_flag'] == 0:
			if radio_status['packet_flag'] == 1:
				break
			time.sleep(0.1)

		return True

	def multi_transmit(self, message, channels, retries = 3):
		for i in range(retries):