fixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bts/+/33586 )

Change subject: [WIP] osmo-bts-trx: rx_tch[fh]_fn(): separate FACCH decoding ......................................................................

[WIP] osmo-bts-trx: rx_tch[fh]_fn(): separate FACCH decoding

Change-Id: I4c6736e84c271240d457998de688c0baf59fe578 --- M src/osmo-bts-trx/sched_lchan_tchf.c 1 file changed, 39 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/86/33586/1

diff --git a/src/osmo-bts-trx/sched_lchan_tchf.c b/src/osmo-bts-trx/sched_lchan_tchf.c index ac6fbd1..3c34522 100644 --- a/src/osmo-bts-trx/sched_lchan_tchf.c +++ b/src/osmo-bts-trx/sched_lchan_tchf.c @@ -69,6 +69,36 @@

extern const uint8_t sched_tchh_dl_amr_cmi_map[26];

+# if 0 +static int decode_facch(struct l1sched_ts *l1ts, + const struct trx_ul_burst_ind *bi) +{ + struct l1sched_chan_state *l1cs = &l1ts->chan_state[bi->chan] + const sbit_t *bursts_p = chan_state->ul_bursts; + struct l1sched_meas_set meas_avg; + uint8_t data[GSM_MACBLOCK_LEN]; + int n_errors, n_bits_total; + uint16_t ber10k; + + rc = gsm0503_tch_fr_facch_decode(&data[0], BUFTAIL8(bursts_p), + &n_errors, &n_bits_total); + if (rc != GSM_MACBLOCK_LEN) + return rc; + + /* average measurements of the last 8 bursts, obtain TDMA Fn of the first burst */ + trx_sched_meas_avg(l1cs, &meas_avg, SCHED_MEAS_AVG_M_S8N8); + ber10k = compute_ber10k(n_bits_total, n_errors); + + /* meas_avg.fn now contains TDMA frame number of the first burst */ + _sched_compose_ph_data_ind(l1ts, meas_avg.fn, bi->chan, + &data[0], GSM_MACBLOCK_LEN, + meas_avg.rssi, meas_avg.toa256, + meas_avg.ci_cb, ber10k, + PRES_INFO_UNKNOWN); + return 0; +} +#endif + /* Process a single Uplink TCH/F burst received by the PHY. * This function is visualized in file 'doc/trx_sched_tch.txt'. */ int rx_tchf_fn(struct l1sched_ts *l1ts, const struct trx_ul_burst_ind *bi)