FreeCalypso > hg > fc-rfcal-tools

annotate autocal/rxcommon.c @ 63:131abadbd74d

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doc/Rx-cal-theory written
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 28 May 2017 03:21:34 +0000
parents 1a0dbc746d57
children
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1 /*
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2 * This module contains the common code for
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3 * fc-rfcal-gmagic and fc-rfcal-rxband.
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4 */
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5
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6 #include <stdio.h>
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7 #include <stdlib.h>
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8 #include <unistd.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 "l1stats.h"
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12 #include "rxcaldefs.h"
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13
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14 l1tm_setup_for_rxcal()
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15 {
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16 do_rxpw(RX_AGC_ENA_FLAG, 0);
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17 do_rxpw(RX_AGC_GAIN, RXCAL_AGC_DB);
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18 do_rfpw(AFC_ENA_FLAG, 0);
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19 do_scw(LOOPS, RXCAL_LOOP_COUNT);
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20 do_scw(AUTO_RESULT_LOOPS, RXCAL_LOOP_COUNT);
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21 do_scw(AUTO_RESET_LOOPS, RXCAL_LOOP_COUNT);
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22 do_scw(STAT_TYPE, ACCUMULATED_RX_STATS);
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23 do_scw(STAT_BITMASK, DSP_PM);
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24 return(0);
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25 }
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26
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27 halfdb_to_string(halfdb, strbuf)
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28 int halfdb;
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29 char *strbuf;
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30 {
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31 int sign;
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32
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33 if (halfdb < 0) {
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34 sign = 1;
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35 halfdb = -halfdb;
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36 } else
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37 sign = 0;
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38 sprintf(strbuf, "%s%d.%c", sign ? "-" : "", halfdb >> 1,
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39 halfdb & 1 ? '5' : '0');
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40 return(0);
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41 }
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42
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43 static unsigned
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44 rx_single_offset_meas(arfcn, offset)
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45 unsigned arfcn;
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46 char *offset;
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47 {
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48 char dbm[64], tsid_cmd[128];
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49 struct l1stats l1st;
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50 unsigned pm;
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51
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52 halfdb_to_string(RXCAL_SIGGEN_LEVEL, dbm);
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53 printf("Rx meas at ARFCN %u offset %s kHz, TL=%s dBm, AGC=%d dB\n",
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54 arfcn, offset, dbm, RXCAL_AGC_DB);
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55 sprintf(tsid_cmd, "signal-gen-sine %u %s %s\n", arfcn, offset, dbm);
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56 tsid_command(tsid_cmd);
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57 usleep(20000);
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58 do_rfe(RX_TCH);
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59 collect_auto_stats(&l1st);
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60 collect_rfe_completion();
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61 if (!(l1st.bitmask & DSP_PM)) {
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62 fprintf(stderr, "DUT error: no DSP_PM in auto-stats msg\n");
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63 exit(ERROR_TARGET);
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64 }
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65 pm = l1st.dsp_pm;
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66 printf("DSP_PM=0x%04X, %u half-dBm\n", pm, (pm + 16) >> 5);
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67 return(pm);
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68 }
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69
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70 unsigned
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71 rx_measure(arfcn)
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72 unsigned arfcn;
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73 {
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74 unsigned pm1, pm2;
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75
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76 do_rfpw(TCH_ARFCN, arfcn);
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77 pm1 = rx_single_offset_meas(arfcn, "+67");
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78 pm2 = rx_single_offset_meas(arfcn, "-67");
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79 return (pm1 + pm2 + 32) >> 6;
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80 }