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annotate miscutil/ti2arfcn.c @ 834:c458e33060bf

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ffstools/tiaud: prep for adding support for new AEC
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 30 Jul 2021 00:10:13 +0000
parents d2fccd82a83e
children
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d2fccd82a83e ti2arfcn 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 TI's radio_freq numbers as seen in L1 traces
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11 * into standard ARFCNs.
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12 */
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13
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14 #include <stdio.h>
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15 #include <stdlib.h>
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16 #include <string.h>
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17 #include <strings.h>
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18
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19 main(argc, argv)
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20 char **argv;
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21 {
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22 int ti_num;
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23
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24 if (argc != 3) {
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25 usage: fprintf(stderr, "usage: %s {eu|us} L1_radio_freq\n", argv[0]);
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26 exit(1);
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27 }
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28 ti_num = atoi(argv[2]);
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29 if (!strcmp(argv[1], "eu"))
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30 ti2arfcn_eu(ti_num);
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31 else if (!strcmp(argv[1], "us"))
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32 ti2arfcn_us(ti_num);
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33 else
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34 goto usage;
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35 exit(0);
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36 }
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37
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38 ti2arfcn_eu(radio_freq)
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39 {
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40 int arfcn;
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41
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42 if (radio_freq < 1 || radio_freq > 548) {
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43 fprintf(stderr,
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44 "error: specified radio_freq is out of range for dual-EU\n");
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45 exit(1);
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46 }
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47 if (radio_freq < 175) {
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48 if (radio_freq <= 124)
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49 arfcn = radio_freq;
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50 else if (radio_freq < 174)
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51 arfcn = radio_freq - 125 + 975;
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52 else
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53 arfcn = 0;
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54 } else
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55 arfcn = radio_freq - 175 + 512;
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56 printf("%d\n", arfcn);
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57 }
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58
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59 ti2arfcn_us(radio_freq)
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60 {
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61 int arfcn;
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62
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63 if (radio_freq < 1 || radio_freq > 423) {
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64 fprintf(stderr,
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65 "error: specified radio_freq is out of range for dual-US\n");
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66 exit(1);
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67 }
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68 if (radio_freq < 125)
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69 arfcn = radio_freq - 1 + 128;
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70 else
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71 arfcn = radio_freq - 125 + 512;
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72 printf("%d\n", arfcn);
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73 }