FreeCalypso > hg > fc-rfcal-tools

annotate autocal/vcxomain.c @ 100:7ad5836d3b87

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fc-rfcal-vcxo: added check for final freq offset being within 70 Hz
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 11 Aug 2017 02:45:10 +0000
parents 6e8f2728c7f5
children 7ad0495991ed
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1 /*
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2 * This module contains the main() function for fc-rfcal-vcxo.
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3 */
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4
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5 #include <math.h>
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6 #include <stdio.h>
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7 #include <stdint.h>
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8 #include <stdlib.h>
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9 #include <endian.h>
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10 #include <rvinterf/l1tm.h>
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11 #include <rvinterf/exitcodes.h>
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12 #include "afcparams.h"
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13 #include "stdband.h"
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14
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15 #define VCXOCAL_BAND 900
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16 #define VCXOCAL_BAND_RFPW RFPW_STD_BAND(6, 0)
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17 #define VCXOCAL_ARFCN 40
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19 extern float vcxo_freq_meas();
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20
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21 static float freq_max_neg, freq_max_pos;
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22 static float lin_a, lin_b, lin_a2, lin_b2;
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23 static int zero_search_dac1, zero_search_dac2, zero_search_incr;
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24 static float zero_search_freq1, zero_search_freq2, zero_check_freq;
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25 static float dac_min, dac_max, dac_init;
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26 static int dac_init_int;
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27 static float Psi_sta, Psi_st;
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28
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29 struct afcparams afcparams_host, afcparams_arm;
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30
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31 prepare_rf_test_system()
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32 {
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33 char cmd[80];
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34
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35 printf("Preparing RF test system for VCXO calibration\n");
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36 sprintf(cmd, "vcxo-cal-setup %d %d\n", VCXOCAL_BAND, VCXOCAL_ARFCN);
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37 tsid_command(cmd);
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38 return(0);
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39 }
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40
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41 main(argc, argv)
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42 char **argv;
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43 {
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44 socket_pathname_options(argc, argv);
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45 connect_rvinterf_socket();
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46 connect_tsid_socket();
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47 setlinebuf(stdout); /* to allow logging with tee */
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48 prepare_rf_test_system();
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49
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50 printf("Putting the DUT into Test Mode\n");
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51 do_tms(1);
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52 do_rfpw(STD_BAND_FLAG, VCXOCAL_BAND_RFPW);
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53 do_rfpw(TCH_ARFCN, VCXOCAL_ARFCN);
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54 do_rfpw(AFC_ENA_FLAG, 0);
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55 do_txpw(TX_PWR_LEVEL, 12);
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56 printf("Starting RF Tx on the DUT\n");
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57 do_rfe(RX_TX_TCH);
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58
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59 /* initial measurements at the DAC extremes */
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60 freq_max_neg = vcxo_freq_meas(-2048, "max-neg");
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61 freq_max_pos = vcxo_freq_meas(2048, "max-pos");
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62 lin_a = (freq_max_pos - freq_max_neg) / 4096.0f;
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63 lin_b = freq_max_pos - lin_a * 2048.0f;
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64 zero_search_dac1 = -lin_b / lin_a;
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65 zero_search_freq1 = vcxo_freq_meas(zero_search_dac1, "zero-search");
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67 /* search for zero crossing */
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68 if (zero_search_freq1 < 0)
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69 zero_search_incr = 100;
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70 else
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71 zero_search_incr = -100;
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72 for (;;) {
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73 zero_search_dac2 = zero_search_dac1 + zero_search_incr;
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74 zero_search_freq2 = vcxo_freq_meas(zero_search_dac2,
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75 "zero-search");
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76 if (zero_search_incr > 0 && zero_search_freq2 >= 0)
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77 break;
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78 if (zero_search_incr < 0 && zero_search_freq2 < 0)
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79 break;
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80 zero_search_dac1 = zero_search_dac2;
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81 zero_search_freq1 = zero_search_freq2;
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82 }
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83
27
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84 /* second linear approximation */
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85 lin_a2 = (zero_search_freq2 - zero_search_freq1) /
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86 (float)(zero_search_dac2 - zero_search_dac1);
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87 lin_b2 = zero_search_freq2 - lin_a2 * zero_search_dac2;
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88
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89 /* DAC settings */
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90 dac_min = (-13500.0f - lin_b) / lin_a;
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91 dac_max = (13500.0f - lin_b) / lin_a;
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92 dac_init = -lin_b2 / lin_a2;
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93 dac_init_int = (int) dac_init;
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94
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95 /* check the frequency offset at the final DAC value */
100
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96 zero_check_freq = vcxo_freq_meas(dac_init_int, "zero-check");
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97
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98 /* done with the measurements and the Tx */
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99 printf("Stopping RF Tx on the DUT\n");
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100 do_rfe(STOP_ALL);
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101
100
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102 /* sanity check */
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103 if (zero_check_freq < -70.0f || zero_check_freq > 70.0f) {
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104 printf("Error: final freq offset out of range, aborting\n");
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105 exit(ERROR_TARGET);
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106 }
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107
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108 /* Psi computations */
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109 Psi_sta = 2.0f * (float)M_PI * lin_a / 270833.0f;
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110 Psi_st = Psi_sta * 0.8f;
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111
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112 /* compute and fill afcparams */
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113 afcparams_host.psi_sta_inv = (unsigned)(1.0f / Psi_sta);
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114 afcparams_host.psi_st = (unsigned)(Psi_st * 65536.0f);
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115 afcparams_host.psi_st_32 = (unsigned)(Psi_st * 65536.0f * 65536.0f);
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116 afcparams_host.psi_st_inv = (unsigned)(1.0f / Psi_st);
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117 afcparams_host.dac_center = (int)(dac_init * 8.0f);
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118 afcparams_host.dac_min = (int)(dac_min * 8.0f);
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119 afcparams_host.dac_max = (int)(dac_max * 8.0f);
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120 afcparams_host.snr_thr = 2560;
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121
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122 /* print them out */
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123 printf("afcparams Psi_sta_inv: %u\n", afcparams_host.psi_sta_inv);
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124 printf("afcparams Psi_st: %u\n", afcparams_host.psi_st);
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125 printf("afcparams Psi_st_32: %u\n", afcparams_host.psi_st_32);
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126 printf("afcparams Psi_st_inv: %u\n", afcparams_host.psi_st_inv);
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127 printf("afcparams DAC_INIT*8: %d\n", afcparams_host.dac_center);
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128 printf("afcparams DAC_MIN*8: %d\n", afcparams_host.dac_min);
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129 printf("afcparams DAC_MAX*8: %d\n", afcparams_host.dac_max);
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130 printf("afcparams snr_thr: %d\n", afcparams_host.snr_thr);
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diff changeset
131
30
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132 /* convert to LE for upload to the DUT */
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133 afcparams_arm.psi_sta_inv = htole32(afcparams_host.psi_sta_inv);
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134 afcparams_arm.psi_st = htole32(afcparams_host.psi_st);
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135 afcparams_arm.psi_st_32 = htole32(afcparams_host.psi_st_32);
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136 afcparams_arm.psi_st_inv = htole32(afcparams_host.psi_st_inv);
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137 afcparams_arm.dac_center = htole16(afcparams_host.dac_center);
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138 afcparams_arm.dac_min = htole16(afcparams_host.dac_min);
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139 afcparams_arm.dac_max = htole16(afcparams_host.dac_max);
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140 afcparams_arm.snr_thr = htole16(afcparams_host.snr_thr);
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141
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142 /* send them up */
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143 printf("Uploading afcparams and INITIAL_AFC_DAC to the DUT\n");
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144 do_rftw(AFC_PARAMS, &afcparams_arm, sizeof(struct afcparams));
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145 do_rfpw(INITIAL_AFC_DAC, dac_init_int);
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146 printf("Saving rf-cal and rf-cfg in FFS\n");
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147 misc_enable(CFG_WRITE_RF_CAL);
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148 misc_enable(CFG_WRITE_RF_CFG);
27
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diff changeset
149
24
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150 exit(0);
21
a3f48378658d autocal: beginning of fc-rfcal-vcxo
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parents:
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151 }