STOP_TRANSCEIVER
bus_space_write_2(iot, ioh, ELINK_COMMAND, STOP_TRANSCEIVER);
bus_space_write_2(iot, ioh, ELINK_COMMAND, STOP_TRANSCEIVER);
bus_space_write_2(iot, ioh, ELINK_COMMAND, STOP_TRANSCEIVER);
bus_space_write_2(iot, ioh, ELINK_COMMAND, STOP_TRANSCEIVER);