FIXED_COMM
if (write_dst(state, device_type, FIXED_COMM))
if (read_dst(state, state->rxbuffer, FIXED_COMM))
if (read_dst(state, state->rxbuffer, FIXED_COMM)) {
retval = read_dst(state, &state->rx_tuna[2], FIXED_COMM);
retval = write_dst(state, &state->tx_tuna[2], FIXED_COMM);