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Diffstat (limited to 'src/target/firmware/layer1/apc.c')
-rw-r--r-- | src/target/firmware/layer1/apc.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/target/firmware/layer1/apc.c b/src/target/firmware/layer1/apc.c new file mode 100644 index 00000000..5cff191b --- /dev/null +++ b/src/target/firmware/layer1/apc.c @@ -0,0 +1,57 @@ +/* APC (Automatic Power Control) Implementation */ + +/* (C) 2010 by Harald Welte <laforge@gnumonks.org> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include <errno.h> + +#include <osmocore/utils.h> +#include <osmocore/gsm_utils.h> + +#include <layer1/apc.h> + +/* calibration table defined in board file */ +extern const int16_t dbm2apc_gsm900[]; +extern const int dbm2apc_gsm900_max; + + +/* determine the AUXAPC value by the Tx Power Level */ +int16_t apc_tx_dbm2auxapc(enum gsm_band band, int8_t dbm) +{ + if (dbm < 0) + return -ERANGE; + + /* FIXME: offsets for different bands! */ + if (dbm > dbm2apc_gsm900_max) + dbm = dbm2apc_gsm900_max; + + return dbm2apc_gsm900[dbm]; +} + +/* determine the AUXAPC value by the Tx Power Level */ +int16_t apc_tx_pwrlvl2auxapc(enum gsm_band band, uint8_t lvl) +{ + /* convert tx power level to dBm */ + int dbm = ms_pwr_dbm(band, lvl); + if (dbm < 0) + return dbm; + + return apc_tx_dbm2auxapc(band, dbm); +} |