62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
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/* dwgps.h */
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#ifndef DWGPS_H
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#define DWGPS_H 1
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#include <time.h>
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#include "config.h" /* for struct misc_config_s */
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/*
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* Values for fix, equivalent to values from libgps.
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* -2 = not initialized.
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* -1 = error communicating with GPS receiver.
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* 0 = nothing heard yet.
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* 1 = had signal but lost it.
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* 2 = 2D.
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* 3 = 3D.
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*
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* Undefined float & double values are set to G_UNKNOWN.
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*
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*/
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enum dwfix_e { DWFIX_NOT_INIT= -2, DWFIX_ERROR= -1, DWFIX_NOT_SEEN=0, DWFIX_NO_FIX=1, DWFIX_2D=2, DWFIX_3D=3 };
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typedef enum dwfix_e dwfix_t;
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typedef struct dwgps_info_s {
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time_t timestamp; /* When last updated. System time. */
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dwfix_t fix; /* Quality of position fix. */
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double dlat; /* Latitude. Valid if fix >= 2. */
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double dlon; /* Longitude. Valid if fix >= 2. */
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float speed_knots; /* libgps uses meters/sec but we use GPS usual knots. */
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float track; /* What is difference between track and course? */
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float altitude; /* meters above mean sea level. Valid if fix == 3. */
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} dwgps_info_t;
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void dwgps_init (struct misc_config_s *pconfig, int debug);
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void dwgps_clear (dwgps_info_t *gpsinfo);
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dwfix_t dwgps_read (dwgps_info_t *gpsinfo);
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void dwgps_print (char *msg, dwgps_info_t *gpsinfo);
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void dwgps_term (void);
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void dwgps_set_data (dwgps_info_t *gpsinfo);
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#endif /* DWGPS_H 1 */
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/* end dwgps.h */
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