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annotate miscutil/arfcn2ti.c @ 964:a96cb97b66a2

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ringtools/imy: fix duplicate definition of tdma_durations[] The bug was reported by Vadim Yanitskiy <fixeria@osmocom.org>, although the present fix is slightly different from the contributed patch: because main.c doesn't need this tdma_durations[] array at all, let's simply remove the reference to this array from main.c rather than turn it into an extern. I no longer remember my original thought flow that resulted (by mistake) in tdma_durations[] being multiply defined in main.c and durations.c. My intent might have been to define all globals in main.c and have the reference in durations.c be an extern - and I missed that extern - but without clear memory, I have no certainty. In any case, having this data array defined in the same module that fills it (durations.c) is sensible, so let's make it the new way.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 31 Aug 2023 19:38:18 +0000
parents b8cb116a7dc7
children
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1 /*
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2 * TI's TCS211 L1 does not use standard ARFCNs internally, instead it uses
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3 * its own non-standard radio_freq numbers in their place. Other firmware
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4 * components and all external interfaces do use standard ARFCNs, thus
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5 * conversion functions are invoked at appropriate points in the firmware.
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6 * However, L1-internal radio_freq numbers are emitted in L1 debug traces,
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7 * thus anyone looking at these traces needs to be able to convert between
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8 * standard ARFCNs and L1-internal radio_freq.
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9 *
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10 * The present utility converts a standard ARFCN into TI L1 radio_freq.
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11 */
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12
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13 #include <stdio.h>
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14 #include <stdlib.h>
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15 #include <string.h>
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16 #include <strings.h>
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17
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18 main(argc, argv)
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19 char **argv;
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20 {
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21 int arfcn;
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22
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23 if (argc != 3) {
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24 usage: fprintf(stderr, "usage: %s {eu|us} arfcn\n", argv[0]);
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25 exit(1);
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26 }
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27 arfcn = atoi(argv[2]);
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28 if (!strcmp(argv[1], "eu"))
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29 arfcn2ti_eu(arfcn);
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30 else if (!strcmp(argv[1], "us"))
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31 arfcn2ti_us(arfcn);
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32 else
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33 goto usage;
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34 exit(0);
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35 }
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36
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37 arfcn2ti_eu(arfcn)
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38 {
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39 if (arfcn == 0)
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40 arfcn = 174;
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41 else if ((arfcn >= 975) && (arfcn <= 1023))
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42 arfcn -= 850;
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43 else if ((arfcn >= 512) && (arfcn <= 885))
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44 arfcn -= 337;
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45 else if ((arfcn >= 1) && (arfcn <= 124))
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46 ;
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47 else {
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48 fprintf(stderr,
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49 "error: specified ARFCN is invalid for dual-EU\n");
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50 exit(1);
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51 }
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52 printf("%d\n", arfcn);
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53 }
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54
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55 arfcn2ti_us(arfcn)
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56 {
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57 if ((arfcn >= 128) && (arfcn <= 251))
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58 arfcn -= 127;
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59 else if ((arfcn >= 512) && (arfcn <= 810))
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60 arfcn -= 387;
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61 else {
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62 fprintf(stderr,
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63 "error: specified ARFCN is invalid for dual-US\n");
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64 exit(1);
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65 }
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66 printf("%d\n", arfcn);
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67 }