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annotate autocal/txcalchan.c @ 116:4ce87a30383f

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fc-rfcal-txband: channel calibration implemented
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 13 Feb 2018 06:22:32 +0000
parents 3f63e71b6422
children 4c3f4231a021
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1 /*
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2 * This module contains the code for handling Tx calchan tables.
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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 <stdint.h>
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8 #include <endian.h>
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9 #include <rvinterf/l1tm.h>
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10 #include <rvinterf/exitcodes.h>
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11 #include "txband.h"
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12 #include "txcalchan.h"
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13
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14 extern double tx_power_meas();
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15 extern vout_t dbm_to_vout();
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16
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17 extern struct txcal_band *txcal_band;
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18 extern struct tx_level tx_levels[MAX_TX_LEVELS];
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19
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20 unsigned tx_calchan_values[TX_CALCHAN_TABLES][TX_CALCHAN_ENTRIES];
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21
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22 init_tx_calchan()
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23 {
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24 unsigned i, j;
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25
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26 for (i = 0; i < TX_CALCHAN_TABLES; i++)
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27 for (j = 0; j < TX_CALCHAN_ENTRIES; j++)
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28 tx_calchan_values[i][j] = 128;
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29 return(0);
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30 }
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31
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32 tx_calchan_one_table(tblnum)
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33 unsigned tblnum;
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34 {
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35 vout_t vout[TX_CALCHAN_ENTRIES];
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36 char cmd[80];
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37 unsigned n, arfcn, plidx;
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38 double meas;
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39 int nanflag = 0;
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40 int apc_delta;
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41 unsigned apc_wanted;
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42
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43 printf("Calibrating Tx channel correction table %u (PL #%u)\n", tblnum,
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44 txcal_band->calchan_plnum[tblnum]);
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45 do_txpw(TX_PWR_LEVEL, txcal_band->calchan_plnum[tblnum]);
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46 plidx = txcal_band->calchan_plnum[tblnum] - txcal_band->start_plnum;
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47 printf("Starting RF Tx on the DUT\n");
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48 do_rfe(RX_TX_TCH);
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49 for (n = 0; n < TX_CALCHAN_ENTRIES; n++) {
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50 arfcn = txcal_band->calchan_ranges[n].test_arfcn;
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51 sprintf(cmd, "txpwr-cal-channel %u\n", arfcn);
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52 tsid_command(cmd);
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53 do_rfpw(TCH_ARFCN, arfcn);
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54 usleep(20000);
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55 meas = tx_power_meas();
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56 printf("ARFCN=%u: %.2f dBm\n", arfcn, meas);
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57 if (isnan(meas))
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58 nanflag = 1;
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59 vout[n] = dbm_to_vout(meas);
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60 }
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61 printf("Stopping RF Tx on the DUT\n");
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62 do_rfe(STOP_ALL);
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63 if (nanflag) {
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64 printf("Error: got NaN power measurement, aborting\n");
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65 exit(ERROR_RFFAIL);
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66 }
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67
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68 for (n = 0; n < TX_CALCHAN_ENTRIES; n++) {
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69 apc_delta = (vout[txcal_band->ref_subband] - vout[n]) /
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70 tx_levels[plidx].slope;
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71 apc_wanted = tx_levels[plidx].apc + apc_delta;
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72 tx_calchan_values[tblnum][n] = (apc_wanted * 128) /
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73 tx_levels[plidx].apc;
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74 printf("ARFCN %u-%u: correction=%u\n",
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75 txcal_band->calchan_ranges[n].lower_bound,
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76 txcal_band->calchan_ranges[n].upper_bound,
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77 tx_calchan_values[tblnum][n]);
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78 }
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79 }
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80
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81 calibrate_tx_calchan()
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82 {
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83 unsigned tblnum;
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84
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85 for (tblnum = 0; tblnum < TX_CALCHAN_TABLES; tblnum++)
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86 tx_calchan_one_table(tblnum);
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87 }
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88
77
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89 upload_tx_calchan()
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90 {
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91 unsigned i, j;
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92 struct tx_calchan_entry l1_table[TX_CALCHAN_TABLES][TX_CALCHAN_ENTRIES];
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93
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94 for (i = 0; i < TX_CALCHAN_TABLES; i++) {
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95 for (j = 0; j < TX_CALCHAN_ENTRIES; j++) {
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96 l1_table[i][j].arfcn_limit =
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97 htole16(txcal_band->calchan_ranges[j].upper_bound);
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98 l1_table[i][j].chan_cal =
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99 htole16(tx_calchan_values[i][j]);
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100 }
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101 }
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102 do_rftw(TX_CAL_CHAN, l1_table, sizeof l1_table);
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103 return(0);
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104 }