FreeCalypso > hg > freecalypso-tools

annotate miscutil/arfcn2ti.c @ 905:546bf873ccc8

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tchtools: new program fc-vm2gsmx
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 28 Dec 2022 09:08:50 +0000
parents b8cb116a7dc7
children
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b8cb116a7dc7 arfcn2ti utility added to miscutil
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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 }