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comparison cmu200/band.c @ 2:e2db512abbee

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fc-cmu200d: band and ARFCN tables implemented
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 21 May 2017 06:37:56 +0000
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1:698602bbd120 2:e2db512abbee
1 /*
2 * Our band and ARFCN tables and lookup code live here.
3 */
4
5 #include <string.h>
6 #include <strings.h>
7 #include "band.h"
8 #include "secaddr.h"
9
10 struct arfcn_range band850_arfcn_range = {128, 251, 824200, 869200};
11 struct arfcn_range band900_arfcn_range = { 0, 124, 890000, 935000};
12 struct arfcn_range band900_arfcn_range_ext = {975, 1023, 880200, 925200};
13 struct arfcn_range band1800_arfcn_range = {512, 885, 1710200, 1805200};
14 struct arfcn_range band1900_arfcn_range = {512, 810, 1850200, 1930200};
15
16 struct band supported_bands[] = {
17 {"850", SECADDR_GSM850MS_NSIG, &band850_arfcn_range, 0},
18 {"900", SECADDR_GSM900MS_NSIG, &band900_arfcn_range,
19 &band900_arfcn_range_ext},
20 {"1800", SECADDR_GSM1800MS_NSIG, &band1800_arfcn_range, 0},
21 {"1900", SECADDR_GSM1900MS_NSIG, &band1900_arfcn_range, 0},
22 {0, 0, 0, 0}
23 };
24
25 struct band *current_band;
26
27 find_named_band(srchname)
28 char *srchname;
29 {
30 struct band *band;
31
32 for (band = supported_bands; band->name; band++)
33 if (!strcmp(band->name, srchname))
34 break;
35 if (!band->name)
36 return(-1);
37 current_band = band;
38 return(0);
39 }
40
41 check_arfcn_range(range, arfcn, ulp, dlp)
42 struct arfcn_range *range;
43 unsigned arfcn, *ulp, *dlp;
44 {
45 if (arfcn < range->min)
46 return(-1);
47 if (arfcn > range->max)
48 return(-1);
49 if (ulp)
50 *ulp = range->ul_khz + (arfcn - range->min) * 200;
51 if (dlp)
52 *dlp = range->dl_khz + (arfcn - range->min) * 200;
53 return(0);
54 }
55
56 verify_arfcn(arfcn, ulp, dlp)
57 unsigned arfcn, *ulp, *dlp;
58 {
59 if (!check_arfcn_range(current_band->arfcn_range, arfcn, ulp, dlp))
60 return(0);
61 if (current_band->arfcn_range_ext &&
62 !check_arfcn_range(current_band->arfcn_range_ext, arfcn, ulp, dlp))
63 return(0);
64 return(-1);
65 }