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comparison autocal/txlevels.c @ 82:a094db1453b1

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fc-rfcal-txband: implemented computation of APC from basis
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 15 Jul 2017 22:48:29 +0000
parents
children 45ef4a06edfc
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81:83b24a1dfd4a 82:a094db1453b1
1 /*
2 * The calibration of Tx power levels is implemented here.
3 */
4
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <rvinterf/l1tm.h>
8 #include <rvinterf/exitcodes.h>
9 #include "txband.h"
10
11 extern double tx_power_meas();
12 extern vout_t dbm_to_vout();
13
14 extern struct txcal_band *txcal_band;
15 extern struct tx_basis_point tx_basis[MAX_BASIS_POINTS];
16 extern unsigned num_basis_points;
17 extern struct tx_level tx_levels[MAX_TX_LEVELS];
18
19 unsigned
20 find_apc_for_target(target_dbm)
21 double target_dbm;
22 {
23 vout_t target_vout;
24 unsigned n;
25 int apc_delta;
26
27 target_vout = dbm_to_vout(target_dbm);
28 for (n = 0; n < num_basis_points - 1; n++)
29 if (target_vout < tx_basis[n+1].vout)
30 break;
31 apc_delta = (target_vout - tx_basis[n].vout) / tx_basis[n].slope;
32 return tx_basis[n].apc + apc_delta;
33 }