File content as of revision 6:4ed12067a314:

#include "mbed.h"

#ifndef MBED_GPS_PARSER_H
#define MBED_GPS_PARSER_H

#define NO_LOCK     1
#define NOT_PARSED  2
#define GGA         3
#define GLL         4
#define RMC         5
#define VTG         6

#define PI (3.141592653589793)

/**  A GPS_parser interface for reading from a Globalsat EM-406 GPS Module */
class GPS_Parser {
public:

    GPS_Parser();
    
    /** Sample the incoming GPS data, returning whether there is a lock
     * 
     * @return 1 if there was a lock when the sample was taken (and therefore .longitude and .latitude are valid), else 0
     */
    int sample(char *);
    int get_lock() { return lock; }
    int get_date() { return date; }
    float get_time() { return utc_time; }
    float get_nmea_longitude();
    float get_nmea_latitude();
    float get_dec_longitude();
    float get_dec_latitude();
    float get_msl_altitude();
    float get_course_t();
    float get_course_m();
    float get_speed_k();
    float get_speed_km();
    int get_satelites();
    float get_altitude_ft();
    
    // navigational functions
    float calc_course_to(float, float);
    double calc_dist_to_mi(float, float);
    double calc_dist_to_ft(float, float);
    double calc_dist_to_km(float, float);
    double calc_dist_to_m(float, float);
    
private:
    float nmea_to_dec(float, char);
    float trunc(float v);
    
    // calculated values
    volatile float dec_longitude;
    volatile float dec_latitude;
    volatile float altitude_ft;
    
    // GGA - Global Positioning System Fixed Data
    volatile float nmea_longitude;
    volatile float nmea_latitude;    
    volatile float utc_time;
    volatile char ns, ew;
    volatile int lock;
    volatile int satelites;
    volatile float hdop;
    volatile float msl_altitude;
    volatile char msl_units;
    
    // RMC - Recommended Minimmum Specific GNS Data
    volatile char rmc_status;
    volatile float speed_k;
    volatile float course_d;
    volatile int date;
    
    // GLL
    volatile char gll_status;
    
    // VTG - Course over ground, ground speed
    volatile float course_t; // ground speed true
    volatile char course_t_unit;
    volatile float course_m; // magnetic
    volatile char course_m_unit;
    volatile char speed_k_unit;
    volatile float speed_km; // speek km/hr
    volatile char speed_km_unit;
};

#endif