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annotate autocal/txbasis.c @ 81:83b24a1dfd4a

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fc-rfcal-txband: implemented the slope computations after basis run
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 15 Jul 2017 21:34:29 +0000
parents b0da2db4e36b
children b0618796d28d
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b0da2db4e36b fc-rfcal-txband: basis run implemented
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1 /*
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2 * The basis steps of Tx power level calibration are implemented here.
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3 */
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4
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5 #include <stdio.h>
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6 #include <stdlib.h>
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7 #include <rvinterf/l1tm.h>
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8 #include <rvinterf/exitcodes.h>
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9 #include "txband.h"
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10
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11 extern double tx_power_meas();
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12 extern vout_t dbm_to_vout();
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13
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14 extern struct txcal_band *txcal_band;
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15 extern struct tx_basis_point tx_basis[MAX_BASIS_POINTS];
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16 extern unsigned num_basis_points;
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17
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18 txcal_basis_run()
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19 {
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20 unsigned n;
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21 double meas;
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22
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23 printf("Performing the calibration basis run\n");
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24 do_txpw(TX_PWR_LEVEL, txcal_band->start_plnum);
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25 printf("Starting RF Tx on the DUT\n");
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26 do_rfe(RX_TX_TCH);
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27
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28 for (n = 0; n < num_basis_points; n++) {
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29 do_txpw(TX_APC_DAC, tx_basis[n].apc);
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30 usleep(20000);
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31 meas = tx_power_meas();
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32 printf("APC DAC=%u: %.2f dBm\n", tx_basis[n].apc, meas);
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33 tx_basis[n].vout = dbm_to_vout(meas);
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34 }
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35
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36 printf("Stopping RF Tx on the DUT\n");
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37 do_rfe(STOP_ALL);
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38 return(0);
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39 }
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40
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41 txcal_basis_compute()
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42 {
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43 unsigned n;
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44
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45 for (n = 0; n < num_basis_points - 1; n++) {
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46 if (tx_basis[n+1].vout <= tx_basis[n].vout) {
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47 fprintf(stderr,
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48 "error: Vout at APC=%u is not greater than at APC=%u\n",
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49 tx_basis[n+1].apc, tx_basis[n].apc);
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50 exit(ERROR_RFTEST);
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51 }
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52 tx_basis[n].slope = (tx_basis[n+1].vout - tx_basis[n].vout) /
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53 (tx_basis[n+1].apc - tx_basis[n].apc);
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54 }
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55 return(0);
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56 }