/* if we can transmit data, do so */
if (ao_packet_tx_used && ao_tx_packet.len == 0)
continue;
if (ao_rx_packet.packet.len)
ao_packet_master_busy();
ao_packet_master_sleeping = 1;
/* if we can transmit data, do so */
if (ao_packet_tx_used && ao_tx_packet.len == 0)
continue;
if (ao_rx_packet.packet.len)
ao_packet_master_busy();
ao_packet_master_sleeping = 1;