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