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comparison miscutil/ti2arfcn.c @ 759:d2fccd82a83e

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ti2arfcn utility added to miscutil
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 27 Nov 2020 04:39:38 +0000
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758:b8cb116a7dc7 759:d2fccd82a83e
1 /*
2 * TI's TCS211 L1 does not use standard ARFCNs internally, instead it uses
3 * its own non-standard radio_freq numbers in their place. Other firmware
4 * components and all external interfaces do use standard ARFCNs, thus
5 * conversion functions are invoked at appropriate points in the firmware.
6 * However, L1-internal radio_freq numbers are emitted in L1 debug traces,
7 * thus anyone looking at these traces needs to be able to convert between
8 * standard ARFCNs and L1-internal radio_freq.
9 *
10 * The present utility converts TI's radio_freq numbers as seen in L1 traces
11 * into standard ARFCNs.
12 */
13
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <string.h>
17 #include <strings.h>
18
19 main(argc, argv)
20 char **argv;
21 {
22 int ti_num;
23
24 if (argc != 3) {
25 usage: fprintf(stderr, "usage: %s {eu|us} L1_radio_freq\n", argv[0]);
26 exit(1);
27 }
28 ti_num = atoi(argv[2]);
29 if (!strcmp(argv[1], "eu"))
30 ti2arfcn_eu(ti_num);
31 else if (!strcmp(argv[1], "us"))
32 ti2arfcn_us(ti_num);
33 else
34 goto usage;
35 exit(0);
36 }
37
38 ti2arfcn_eu(radio_freq)
39 {
40 int arfcn;
41
42 if (radio_freq < 1 || radio_freq > 548) {
43 fprintf(stderr,
44 "error: specified radio_freq is out of range for dual-EU\n");
45 exit(1);
46 }
47 if (radio_freq < 175) {
48 if (radio_freq <= 124)
49 arfcn = radio_freq;
50 else if (radio_freq < 174)
51 arfcn = radio_freq - 125 + 975;
52 else
53 arfcn = 0;
54 } else
55 arfcn = radio_freq - 175 + 512;
56 printf("%d\n", arfcn);
57 }
58
59 ti2arfcn_us(radio_freq)
60 {
61 int arfcn;
62
63 if (radio_freq < 1 || radio_freq > 423) {
64 fprintf(stderr,
65 "error: specified radio_freq is out of range for dual-US\n");
66 exit(1);
67 }
68 if (radio_freq < 125)
69 arfcn = radio_freq - 1 + 128;
70 else
71 arfcn = radio_freq - 125 + 512;
72 printf("%d\n", arfcn);
73 }