File content as of revision 2:0c9ade531a5b:

/* mbed EM-406 GPS Module Library
 * Copyright (c) 2008-2010, sford
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "mbed.h"

#ifndef MBED_GPS_H
#define MBED_GPS_H

#define NO_LOCK     1
#define NOT_PARSED  2
#define PARSED      3

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

    /** Create the GPS interface, connected to the specified serial port
     */    
    GPS(PinName tx, PinName rx);
    
    /** 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();
    float get_nmea_longitude();
    float get_nmea_latitude();
    float get_dec_longitude();
    float get_dec_latitude();
    float get_msl_altitude();
    int get_satelites();
    
    
private:
    float nmea_to_dec(float, char);
    float trunc(float v);
    void getline();
    
    Serial _gps;
    char msg[256];
    
    // calculated values
    float dec_longitude;
    float dec_latitude;
    
    // GGA - Global Positioning System Fixed Data
    float nmea_longitude;
    float nmea_latitude;    
    float utc_time;
    char ns, ew;
    int lock;
    int satelites;
    float hdop;
    float msl_altitude;
    char msl_units;
    
    // RMC - Recommended Minimmum Specific GNS Data
    char rmc_status;
    float speed_k;
    float course_d;
    int date;
    
    // GLL
    char gll_status;
    
    // VTG - Course over ground, ground speed
    float course_t; // ground speed true
    char course_t_unit;
    float course_m; // magnetic
    char course_m_unit;
    char speed_k_unit;
    float speed_km; // speek km/hr
    char speed_km_unit;
};

#endif