FreeCalypso > hg > freecalypso-tools

annotate rvinterf/etmsync/l1tmops.c @ 407:19e5a3e2f9c0

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fcup-settime: moved time() retrieval a little closer to the output A fundamental problem with all simple time transfer tools is that there is always some delay between the time retrieval on the source system and that transmitted time being set on the destination, and the resulting time on the destination system is off by that delay amount. This delay cannot be fully eliminated when working in a simple environment like ours, but we should make our best effort to minimize it. In the present case, moving the atinterf_init() call before the time() retrieval should make a teensy-tiny improvement.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Aug 2018 21:52:17 +0000
parents 4469d73bbc60
children 4694c7686ccd
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1 /*
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2 * In this module we implement the functions that access the L1TM operations
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3 * which we are going to use in fc-tmsync and fc-readcal.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10 #include <strings.h>
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11 #include "pktmux.h"
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12 #include "tm3.h"
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13 #include "l1tm.h"
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14 #include "exitcodes.h"
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15
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16 extern u_char rvi_msg[];
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17 extern int rvi_msg_len;
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18
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19 do_tms(arg)
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20 {
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21 u_char cmdpkt[5];
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22
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23 cmdpkt[1] = TM_MODE_SET;
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24 cmdpkt[2] = arg;
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25 cmdpkt[3] = arg >> 8;
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26 etm_pkt_exch(cmdpkt, 3);
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27 if (rvi_msg[3]) {
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28 fprintf(stderr, "target error %u in response to tms\n",
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29 rvi_msg[3]);
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30 return(ERROR_TARGET);
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31 }
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32 if (rvi_msg_len != 5) {
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33 fprintf(stderr, "target error: tms response wrong length\n");
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34 return(ERROR_TARGET);
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35 }
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36 return(0);
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37 }
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38
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39 do_rfpr(index, retp)
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40 u_short *retp;
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41 {
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42 u_char cmdpkt[5];
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43
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44 cmdpkt[1] = RF_PARAM_READ;
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45 cmdpkt[2] = index;
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46 cmdpkt[3] = index >> 8;
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47 etm_pkt_exch(cmdpkt, 3);
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48 if (rvi_msg[3]) {
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49 fprintf(stderr, "target error %u in response to rfpr\n",
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50 rvi_msg[3]);
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51 return(ERROR_TARGET);
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52 }
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53 if (rvi_msg_len != 8) {
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54 fprintf(stderr, "target error: rfpr response wrong length\n");
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55 return(ERROR_TARGET);
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56 }
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57 if (rvi_msg[4] != index) {
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58 fprintf(stderr, "target error: rfpr response wrong index\n");
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59 return(ERROR_TARGET);
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60 }
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61 *retp = rvi_msg[5] | (rvi_msg[6] << 8);
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62 return(0);
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63 }
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64
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65 do_rfpw(index, value)
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66 {
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67 u_char cmdpkt[7];
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68
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69 cmdpkt[1] = RF_PARAM_WRITE;
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70 cmdpkt[2] = index;
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71 cmdpkt[3] = index >> 8;
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72 cmdpkt[4] = value;
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73 cmdpkt[5] = value >> 8;
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74 etm_pkt_exch(cmdpkt, 5);
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75 if (rvi_msg[3]) {
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76 fprintf(stderr, "target error %u in response to rfpw\n",
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77 rvi_msg[3]);
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78 return(ERROR_TARGET);
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79 }
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80 if (rvi_msg_len != 6) {
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81 fprintf(stderr, "target error: rfpw response wrong length\n");
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82 return(ERROR_TARGET);
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83 }
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84 if (rvi_msg[4] != index) {
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85 fprintf(stderr, "target error: rfpw response wrong index\n");
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86 return(ERROR_TARGET);
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87 }
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88 return(0);
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89 }
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90
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91 do_rftr(index, table, size)
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92 u_char *table;
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93 {
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94 u_char cmdpkt[4];
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95
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96 cmdpkt[1] = RF_TABLE_READ;
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97 cmdpkt[2] = index;
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98 etm_pkt_exch(cmdpkt, 2);
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99 if (rvi_msg[3]) {
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100 fprintf(stderr, "target error %u in response to rftr\n",
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101 rvi_msg[3]);
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102 return(ERROR_TARGET);
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103 }
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104 if (rvi_msg_len < size + 6) {
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105 fprintf(stderr, "target error: rftr response too short\n");
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106 return(ERROR_TARGET);
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107 }
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108 if (rvi_msg[4] != index) {
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109 fprintf(stderr, "target error: rftr response wrong index\n");
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110 return(ERROR_TARGET);
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111 }
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112 bcopy(rvi_msg + 5, table, size);
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113 return(0);
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114 }
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115
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116 do_ttr(index, buf)
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117 u_char *buf;
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118 {
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119 u_char cmdpkt[4];
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120
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121 cmdpkt[1] = TX_TEMPLATE_READ;
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122 cmdpkt[2] = index;
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123 etm_pkt_exch(cmdpkt, 2);
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124 if (rvi_msg[3]) {
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125 fprintf(stderr, "target error %u in response to ttr\n",
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126 rvi_msg[3]);
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127 return(ERROR_TARGET);
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128 }
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129 if (rvi_msg_len != 38) {
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130 fprintf(stderr, "target error: ttr response wrong length\n");
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131 return(ERROR_TARGET);
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132 }
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133 if (rvi_msg[4] != index) {
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134 fprintf(stderr, "target error: ttr response wrong index\n");
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135 return(ERROR_TARGET);
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136 }
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137 bcopy(rvi_msg + 5, buf, 32);
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138 return(0);
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139 }