Contents of /trunk/src/gps.h

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Revision 252 - (hide annotations)
Thu Feb 4 20:15:19 2010 UTC (14 years, 4 months ago) by harbaum
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Geotoad fixes
1 harbaum 1 /*
2     * Copyright (C) 2008 Till Harbaum <till@harbaum.org>.
3     *
4     * This file is based upon parts of gpsd/libgps
5     *
6     * This file is part of GPXView.
7     *
8     * GPXView is free software: you can redistribute it and/or modify
9     * it under the terms of the GNU General Public License as published by
10     * the Free Software Foundation, either version 3 of the License, or
11     * (at your option) any later version.
12     *
13     * GPXView is distributed in the hope that it will be useful,
14     * but WITHOUT ANY WARRANTY; without even the implied warranty of
15     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16     * GNU General Public License for more details.
17     *
18     * You should have received a copy of the GNU General Public License
19     * along with GPXView. If not, see <http://www.gnu.org/licenses/>.
20     *
21     */
22    
23     #ifndef GPS_H
24     #define GPS_H
25    
26     #include "gpx.h"
27    
28     #ifndef NAN
29     #define NAN (0.0/0.0)
30     #endif /* !NAN */
31    
32     #define MAXCHANNELS 20
33     #define MAXTAGLEN 8 /* maximum length of sentence tag name */
34     #define MPS_TO_KNOTS 1.9438445 /* Meters per second to knots */
35    
36     struct gps_fix_t {
37     int mode; /* Mode of fix */
38     #define MODE_NOT_SEEN 0 /* mode update not seen yet */
39     #define MODE_NO_FIX 1 /* none */
40     #define MODE_2D 2 /* good for latitude/longitude */
41     #define MODE_3D 3 /* good for altitude/climb too */
42 harbaum 233 pos_t pos; /* Latitude/Longitude in degrees (valid if mode >= 2) */
43     float eph; /* Horizontal position uncertainty, meters */
44     float track; /* Course made good (relative to true north) */
45 harbaum 1 };
46    
47     typedef unsigned int gps_mask_t;
48    
49     #ifdef USE_MAEMO
50     #ifdef ENABLE_GPSBT
51     #include <gpsbt.h>
52     #include <gpsmgr.h>
53     #endif
54     #include <errno.h>
55     #endif
56    
57     #ifdef ENABLE_LIBLOCATION
58     #include <location/location-gps-device.h>
59     #include <location/location-gpsd-control.h>
60     #endif
61    
62 harbaum 8 typedef struct {
63     int num;
64     int *PRN;
65     int *ss;
66     int *used;
67     } gps_sat_t;
68    
69 harbaum 252 typedef void (*gps_cb)(struct gps_state *state, void *data);
70 harbaum 149 #define GPS_CB(f) ((gps_cb)(f))
71 harbaum 8
72 harbaum 149 typedef struct {
73     gps_cb cb;
74     gpointer data;
75     } gps_cb_t;
76    
77 harbaum 252 #define LATLON_SET 0x00000008u
78     #define TRACK_SET 0x00000040u
79     #define STATUS_SET 0x00000100u
80     #define MODE_SET 0x00000200u
81     #define HERR_SET 0x00008000u
82     #define SATELLITE_SET 0x00040000u
83    
84 harbaum 1 typedef struct gps_state {
85     #ifndef ENABLE_LIBLOCATION
86     #ifdef ENABLE_GPSBT
87     gpsbt_t context;
88     #endif
89    
90     GThread* thread_p;
91     GMutex *mutex;
92     GnomeVFSInetConnection *iconn;
93     GnomeVFSSocket *socket;
94    
95 harbaum 252 gps_mask_t set; /* has field been set since this was last cleared? */
96     struct gps_fix_t fix; /* accumulated PVT data */
97    
98     /* GPS status -- always valid */
99     int status; /* Do we have a fix? */
100     #define STATUS_NO_FIX 0 /* no */
101     #define STATUS_FIX 1 /* yes, without DGPS */
102     #define STATUS_DGPS_FIX 2 /* yes, with DGPS */
103    
104     /* precision of fix -- valid if satellites_used > 0 */
105     int satellites_used; /* Number of satellites used in solution */
106     int used[MAXCHANNELS]; /* PRNs of satellites used in solution */
107    
108     /* satellite status -- valid when satellites > 0 */
109     int satellites; /* # of satellites in view */
110     int PRN[MAXCHANNELS]; /* PRNs of satellite */
111     int elevation[MAXCHANNELS]; /* elevation of satellite */
112     int azimuth[MAXCHANNELS]; /* azimuth */
113     int ss[MAXCHANNELS]; /* signal-to-noise ratio (dB) */
114    
115 harbaum 1 #else
116     LocationGPSDevice *device;
117 harbaum 11 LocationGPSDControl *control;
118 harbaum 243 gboolean in_use;
119 harbaum 36 guint idd_changed;
120 harbaum 8 int fields;
121 harbaum 233
122     struct gps_fix_t fix;
123 harbaum 8 gps_sat_t sats;
124 harbaum 1 #endif
125 harbaum 149
126     GSList *cb;
127    
128 harbaum 1 } gps_state_t;
129    
130     void gps_init(appdata_t *appdata);
131     void gps_release(appdata_t *appdata);
132     pos_t *gps_get_pos(appdata_t *appdata);
133     float gps_get_heading(appdata_t *appdata);
134 harbaum 53 float gps_get_eph(appdata_t *appdata);
135 harbaum 1 gps_sat_t *gps_get_sats(appdata_t *appdata);
136 harbaum 243 void gps_change_state(appdata_t *appdata);
137 harbaum 1
138 harbaum 149 void *gps_register_callback(appdata_t *appdata, gps_cb cb, gpointer data);
139     void gps_unregister_callback(appdata_t *appdata, void *cb);
140 harbaum 1
141     #endif // GPS_H