1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/* gpsd.h -- fundamental types and structures for the GPS daemon */
#include "config.h"
#include "gps.h"
/* Some internal capabilities depend on which drivers we're compiling. */
#if FV18_ENABLE || TRIPMATE_ENABLE || EARTHMATE_ENABLE || GARMIN_ENABLE || LOGFILE_ENABLE
#define NON_NMEA_ENABLE
#endif /* FV18_ENABLE || TRIPMATE_ENABLE || EARTHMATE_ENABLE || GARMIN_ENABLE || LOGFILE_ENABLE */
#if EARTHMATE_ENABLE
#define ZODIAC_ENABLE
#endif /* EARTHMATE_ENABLE */
#if defined(ZODIAC_ENABLE) || defined(GARMIN_ENABLE)
#define BINARY_ENABLE
#endif /* defined(ZODIAC_ENABLE) || defined(GARMIN_ENABLE) */
#define BUFSIZE 4096 /* longer than longest NMEA sentence (82) */
struct gps_session_t;
struct gps_type_t {
/* GPS method table, describes how to talk to a particular GPS type */
char typekey, *typename, *trigger;
void (*initializer)(struct gps_session_t *session);
int (*validate_buffer)(char *buf, size_t n);
void (*handle_input)(struct gps_session_t *session);
int (*rtcm_writer)(struct gps_session_t *session, char *rtcmbuf, int rtcmbytes);
void (*wrapup)(struct gps_session_t *session);
int baudrate, stopbits, cycle;
};
#if defined (HAVE_SYS_TERMIOS_H)
#include <sys/termios.h>
#else
#if defined (HAVE_TERMIOS_H)
#include <termios.h>
#endif
#endif
struct gps_session_t {
/* session object, encapsulates all global state */
struct gps_data_t gNMEAdata;
struct gps_type_t *device_type;
char *gpsd_device; /* where to find the GPS */
int dsock; /* socket to DGPS server */
int sentdgps; /* have we sent a DGPS correction? */
int fixcnt; /* count of good fixes seen */
struct termios ttyset, ttyset_old;
#if TRIPMATE_ENABLE || defined(ZODIAC_ENABLE) /* public; set by -i option */
char *latitude, *longitude;
char latd, lond;
#endif /* TRIPMATE_ENABLE || defined(ZODIAC_ENABLE) */
#ifdef BINARY_ENABLE
double separation; /* Geoidal separation */
int year, month, day;
int hours, minutes, seconds;
#endif /* BINARY_ENABLE */
#ifdef ZODIAC_ENABLE /* private housekeeping stuff for the Zodiac driver */
unsigned short sn; /* packet sequence number */
double mag_var; /* Magnetic variation in degrees */
/*
* Zodiac chipset channel status from PRWIZCH. Keep it so raw-mode
* translation of Zodiac binary protocol can send it up to the client.
*/
int Zs[MAXCHANNELS]; /* satellite PRNs */
int Zv[MAXCHANNELS]; /* signal values (0-7) */
#endif /* ZODIAC_ENABLE */
};
#define PREFIX(pref, sentence) !strncmp(pref, sentence, sizeof(pref)-1)
/* here are the available GPS drivers */
extern struct gps_type_t **gpsd_drivers;
/* GPS library internal prototypes */
extern int nmea_parse(char *sentence, struct gps_data_t *outdata);
extern int nmea_send(int fd, const char *fmt, ... );
extern int nmea_sane_satellites(struct gps_data_t *out);
extern void nmea_add_checksum(char *sentence);
extern int nmea_validate_buffer(char *buf, size_t n);
extern int gpsd_open(int device_speed, int stopbits, struct gps_session_t *context);
extern int gpsd_set_speed(int, struct termios *, int);
extern int gpsd_get_speed(struct termios *);
extern void gpsd_close(struct gps_session_t *context);
extern void gpsd_binary_fix_dump(struct gps_session_t *session, char *buf);
extern void gpsd_binary_satellite_dump(struct gps_session_t *session, char *buf);
extern void gpsd_binary_quality_dump(struct gps_session_t *session, char *bufp);
extern int netlib_connectsock(const char *host, const char *service, const char *protocol);
/* External interface */
extern struct gps_session_t * gpsd_init(char devtype, char *dgpsserver);
extern int gpsd_activate(struct gps_session_t *session);
extern void gpsd_deactivate(struct gps_session_t *session);
extern int gpsd_poll(struct gps_session_t *session);
extern void gpsd_wrap(struct gps_session_t *session);
/* caller should supply this */
void gpsd_report(int d, const char *fmt, ...);
#define DEFAULT_DEVICE_NAME "/dev/gps"
|
