Diff of /trunk/src/gps.h

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revision 281 by harbaum, Thu Feb 4 20:15:19 2010 UTC revision 282 by harbaum, Wed May 26 19:21:47 2010 UTC
# Line 3  Line 3 
3   *   *
4   * This file is based upon parts of gpsd/libgps   * This file is based upon parts of gpsd/libgps
5   *   *
6   * This file is part of GPXView.   * This file is part of Maep.
7   *   *
8   * GPXView is free software: you can redistribute it and/or modify   * Maep is free software: you can redistribute it and/or modify
9   * it under the terms of the GNU General Public License as published by   * 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   * the Free Software Foundation, either version 3 of the License, or
11   * (at your option) any later version.   * (at your option) any later version.
12   *   *
13   * GPXView is distributed in the hope that it will be useful,   * Maep is distributed in the hope that it will be useful,
14   * but WITHOUT ANY WARRANTY; without even the implied warranty of   * but WITHOUT ANY WARRANTY; without even the implied warranty of
15   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16   * GNU General Public License for more details.   * GNU General Public License for more details.
17   *   *
18   * You should have received a copy of the GNU General Public License   * You should have received a copy of the GNU General Public License
19   * along with GPXView.  If not, see <http://www.gnu.org/licenses/>.   * along with Maep.  If not, see <http://www.gnu.org/licenses/>.
20   *   *
21   */   */
22    
23  #ifndef GPS_H  #ifndef GPS_H
24  #define GPS_H  #define GPS_H
25    
26  #include "gpx.h"  #include <glib.h>
27    #include <math.h>  // for isnan
28    
29    #include <libgnomevfs/gnome-vfs.h>
30    #include <libgnomevfs/gnome-vfs-inet-connection.h>
31    
32    #ifdef USE_LIBGPS
33    #include <gps.h>
34    #endif
35    
36  #ifndef NAN  #ifndef NAN
37  #define NAN (0.0/0.0)  #define NAN (0.0/0.0)
# Line 31  Line 39 
39    
40  #define MAXCHANNELS 20  #define MAXCHANNELS 20
41  #define MAXTAGLEN    8       /* maximum length of sentence tag name */  #define MAXTAGLEN    8       /* maximum length of sentence tag name */
 #define MPS_TO_KNOTS 1.9438445       /* Meters per second to knots */  
42    
43  struct gps_fix_t {  typedef struct {
44      int    mode;        /* Mode of fix */    int prn;     /* prn of satellite, -1 if no info */
45  #define MODE_NOT_SEEN   0       /* mode update not seen yet */    int ss;      /* signal to noise ratio */
46  #define MODE_NO_FIX     1       /* none */    int used;    /* satellite is is being used */
47  #define MODE_2D         2       /* good for latitude/longitude */  } gps_sat_t;
48  #define MODE_3D         3       /* good for altitude/climb too */  
49      pos_t pos;      /* Latitude/Longitude in degrees (valid if mode >= 2) */  struct gps_t {
50      float eph;      /* Horizontal position uncertainty, meters */    double latitude;      /* Latitude in degrees */
51      float track;    /* Course made good (relative to true north) */    double longitude;     /* Longitude in degrees */
52      double altitude;      /* Altitude in meters */
53      double eph;           /* Horizontal position uncertainty, meters */
54      double track;         /* Course made good (relative to true north) */
55    
56      int sat_num;
57      gps_sat_t sat_data[MAXCHANNELS];
58  };  };
59    
60  typedef unsigned int gps_mask_t;  typedef unsigned int gps_mask_t;
61    
62    #define FIX_LATLON_SET     (1<<0)
63    #define FIX_ALTITUDE_SET   (1<<1)
64    #define FIX_TRACK_SET      (1<<2)
65    #define FIX_HERR_SET       (1<<3)
66    #define FIX_SATELLITE_SET  (1<<4)
67    
68    #define LATLON_CHANGED    (FIX_LATLON_SET    << 8)
69    #define ALTITUDE_CHANGED  (FIX_ALTITUDE_SET  << 8)
70    #define TRACK_CHANGED     (FIX_TRACK_SET     << 8)
71    #define HERR_CHANGED      (FIX_HERR_SET      << 8)
72    #define SATELLITE_CHANGED (FIX_SATELLITE_SET << 8)
73    
74    #define CHANGED_MASK 0xff00
75    
76  #ifdef USE_MAEMO  #ifdef USE_MAEMO
77  #ifdef ENABLE_GPSBT  #ifdef ENABLE_GPSBT
78  #include <gpsbt.h>  #include <gpsbt.h>
# Line 54  typedef unsigned int gps_mask_t; Line 81  typedef unsigned int gps_mask_t;
81  #include <errno.h>  #include <errno.h>
82  #endif  #endif
83    
84  #ifdef ENABLE_LIBLOCATION  typedef void (*gps_cb)(gps_mask_t set, struct gps_t *fix, void *data);
85  #include <location/location-gps-device.h>  #define GPS_CB(f) ((gps_cb)(f))
 #include <location/location-gpsd-control.h>  
 #endif  
   
 typedef struct {  
   int num;  
   int *PRN;  
   int *ss;  
   int *used;  
 } gps_sat_t;  
   
 typedef void (*gps_cb)(struct gps_state *state, void *data);  
 #define GPS_CB(f) ((gps_cb)(f))  
86    
87  typedef struct {  typedef struct {
88      gps_mask_t mask;
89    gps_cb cb;    gps_cb cb;
90    gpointer data;    void *data;
91  } gps_cb_t;  } gps_callback_t;
92    
93  #define LATLON_SET      0x00000008u  #ifdef ENABLE_LIBLOCATION
94  #define TRACK_SET       0x00000040u  #include <location/location-gps-device.h>
95  #define STATUS_SET      0x00000100u  #include <location/location-gpsd-control.h>
96  #define MODE_SET        0x00000200u  #endif
 #define HERR_SET        0x00008000u  
 #define SATELLITE_SET   0x00040000u  
97    
98  typedef struct gps_state {  typedef struct gps_state {
99  #ifndef ENABLE_LIBLOCATION  #ifndef ENABLE_LIBLOCATION
# Line 88  typedef struct gps_state { Line 102  typedef struct gps_state {
102  #endif  #endif
103    
104    GThread* thread_p;    GThread* thread_p;
105    GMutex *mutex;    GMutex *mutex, *control_mutex, *global_mutex;
106    
107    #ifdef USE_LIBGPS
108      struct gps_data_t *data;
109    #else
110    GnomeVFSInetConnection *iconn;    GnomeVFSInetConnection *iconn;
111    GnomeVFSSocket *socket;    GnomeVFSSocket *socket;
112    
113    gps_mask_t set;       /* has field been set since this was last cleared? */    /* number of clients requesting satellite details */
114    struct gps_fix_t      fix;            /* accumulated PVT data */    gint sat_requests;
115    #endif
116    
   /* GPS status -- always valid */  
   int    status;                /* Do we have a fix? */  
 #define STATUS_NO_FIX   0       /* no */  
 #define STATUS_FIX      1       /* yes, without DGPS */  
 #define STATUS_DGPS_FIX 2       /* yes, with DGPS */  
   
   /* precision of fix -- valid if satellites_used > 0 */  
   int satellites_used;  /* Number of satellites used in solution */  
   int used[MAXCHANNELS];        /* PRNs of satellites used in solution */  
   
   /* satellite status -- valid when satellites > 0 */  
   int satellites;               /* # of satellites in view */  
   int PRN[MAXCHANNELS]; /* PRNs of satellite */  
   int elevation[MAXCHANNELS];   /* elevation of satellite */  
   int azimuth[MAXCHANNELS];     /* azimuth */  
   int ss[MAXCHANNELS];  /* signal-to-noise ratio (dB) */  
   
117  #else  #else
118    LocationGPSDevice *device;    LocationGPSDevice *device;
119    LocationGPSDControl *control;    LocationGPSDControl *control;
120    gboolean in_use;    gboolean connected;
121    guint idd_changed;    guint idd_changed;
   int fields;  
   
   struct gps_fix_t fix;  
   gps_sat_t sats;  
122  #endif  #endif
123    
124    GSList *cb;    struct {
125        struct gps_t fix;
126        gps_mask_t set;
127      } last;
128    
129  } gps_state_t;    struct gps_t fix;
130      gps_mask_t set;
131    
132  void gps_init(appdata_t *appdata);    GSList *callbacks;
133  void gps_release(appdata_t *appdata);  
134  pos_t *gps_get_pos(appdata_t *appdata);    gboolean stopped, backgrounded;
135  float gps_get_heading(appdata_t *appdata);  
136  float gps_get_eph(appdata_t *appdata);  } gps_state_t;
 gps_sat_t *gps_get_sats(appdata_t *appdata);  
 void gps_change_state(appdata_t *appdata);  
137    
138  void *gps_register_callback(appdata_t *appdata, gps_cb cb, gpointer data);  gps_state_t *gps_init(void);
139  void gps_unregister_callback(appdata_t *appdata, void *cb);  void gps_register_callback(gps_state_t *gps_state, int mask,
140                               gps_cb cb, void *data);
141    void gps_unregister_callback(gps_state_t *gps_state, gps_cb cb);
142    void gps_release(gps_state_t *gps_state);
143    void gps_enable(gps_state_t *gps_state, gboolean enable);
144    
145  #endif // GPS_H  #endif // GPS_H
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