GPSTracker.h

00001 #ifndef GPSTRACKER_H
00002 #define GPSTRACKER_H
00003 
00004 #include <stddef.h>
00005 #include "GPS.h"
00006 #include "rtos.h"
00007 
00008 /**
00009  * A GPS tracker class providing access to the current position.
00010  */
00011 class GPSTracker
00012 {
00013 public:
00014     /**
00015      * Initialize a new GPSTracker object.
00016      * @param gps a previously initialized instance of the GPSI2C class
00017      */
00018     GPSTracker();
00019     
00020     typedef struct {
00021         double altitude;  // altitude  meters
00022         double latitude;  // latitude  degrees
00023         double longitude; // longitude degrees
00024     } Position;
00025     
00026     /**
00027      * Retrieves and invalidates the current position.
00028      * @param position a pointer of type Position where the current position is written to
00029      * @return true on success, false otherwise
00030      */
00031     bool position(Position*);
00032     
00033 protected:
00034     void thread();
00035     static void thread_func(void const*);
00036 
00037 private:
00038     GPSI2C _gps;
00039     Thread _thread;
00040     Mutex _mutex;
00041     Position _position;
00042     bool _positionSet;
00043 };
00044 
00045 #endif