annotate cmu200/band.c @ 65:e7b9a9903f14

doc/Rx-cal-theory: typo fix
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 28 May 2017 05:10:32 +0000
parents e2db512abbee
children
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1 /*
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2 * Our band and ARFCN tables and lookup code live here.
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3 */
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4
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5 #include <string.h>
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6 #include <strings.h>
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7 #include "band.h"
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8 #include "secaddr.h"
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9
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10 struct arfcn_range band850_arfcn_range = {128, 251, 824200, 869200};
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11 struct arfcn_range band900_arfcn_range = { 0, 124, 890000, 935000};
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12 struct arfcn_range band900_arfcn_range_ext = {975, 1023, 880200, 925200};
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13 struct arfcn_range band1800_arfcn_range = {512, 885, 1710200, 1805200};
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14 struct arfcn_range band1900_arfcn_range = {512, 810, 1850200, 1930200};
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15
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16 struct band supported_bands[] = {
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17 {"850", SECADDR_GSM850MS_NSIG, &band850_arfcn_range, 0},
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18 {"900", SECADDR_GSM900MS_NSIG, &band900_arfcn_range,
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19 &band900_arfcn_range_ext},
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20 {"1800", SECADDR_GSM1800MS_NSIG, &band1800_arfcn_range, 0},
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21 {"1900", SECADDR_GSM1900MS_NSIG, &band1900_arfcn_range, 0},
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22 {0, 0, 0, 0}
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23 };
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24
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25 struct band *current_band;
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26
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27 find_named_band(srchname)
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28 char *srchname;
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29 {
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30 struct band *band;
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31
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32 for (band = supported_bands; band->name; band++)
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33 if (!strcmp(band->name, srchname))
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34 break;
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35 if (!band->name)
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36 return(-1);
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37 current_band = band;
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38 return(0);
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39 }
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40
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41 check_arfcn_range(range, arfcn, ulp, dlp)
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42 struct arfcn_range *range;
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43 unsigned arfcn, *ulp, *dlp;
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44 {
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45 if (arfcn < range->min)
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46 return(-1);
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47 if (arfcn > range->max)
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48 return(-1);
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49 if (ulp)
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50 *ulp = range->ul_khz + (arfcn - range->min) * 200;
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51 if (dlp)
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52 *dlp = range->dl_khz + (arfcn - range->min) * 200;
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53 return(0);
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54 }
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55
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56 verify_arfcn(arfcn, ulp, dlp)
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57 unsigned arfcn, *ulp, *dlp;
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58 {
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59 if (!check_arfcn_range(current_band->arfcn_range, arfcn, ulp, dlp))
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60 return(0);
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61 if (current_band->arfcn_range_ext &&
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62 !check_arfcn_range(current_band->arfcn_range_ext, arfcn, ulp, dlp))
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63 return(0);
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64 return(-1);
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65 }