File content as of revision 8:2476bea153a1:

/**************************************************************************************************************************************************************
//  This is a modified version of mbed /users/SamClarke/code/GPS/ for MTK3339 GPS module
//
//  Changes made by Ryan Spillman:
//  added commands to the initialization function to set baud rate, set update rate, enabled DGPS WAAS, and set minimum navigation speed
//  added a function to put the unit into sleep mode
//  added several zeros after the decimal places to fix weird rounding errors
//  added information about checksums
//
//  IMPORTANT:
//  Any changes made to commands sent to GPS unit require corresponding changes to the
//  checksum at the end of the command
//  Here is a tool for calculating the checksum: 
//  http://siliconsparrow.com/demos/nmeachecksum.php
**************************************************************************************************************************************************************/

#include "mbed.h"
#include <string>

#ifndef GPS_H
#define GPS_H

// EXAMPLE OUTPUTS
//
// $GPRMC,064951.000,A,2307.1256,N,12016.4438,E,0.03,165.48,260406,3.05,W,A*2C
// $GPRMC, time, status, latitude, N/S, longitude, E/W, speed(knots), heading, date, N/A, N/A, MODE*CHECKSUM
//
// $GPGGA,064951.000,2307.1256,N,12016.4438,E,1,8,0.95,39.9,M,17.8,M,,*65
// $GPGGA, time, latitude, N/S, longitude, E/W, fix, satellites, hdop, altitude, M, geoidal sep , M,,*CHECKSUM
// $GPGGA, %f, %*f, %*c, %*f, %*c, %d, %d, %*f, %*f, %*c, %*f , %*c,,%*c%*c%*c0

class GPS
{
public:

    GPS(PinName tx, PinName rx);
    int parseData();
    float time;         // UTC time
    int hours;
    int minutes;
    float seconds;
    char validity,ns,ew;// RMC data status A = Data Valid; V = Data Not valid;
    float latitude;     //
    float longitude;    //
    float speed;        // speed in knots
    float heading;      // heading in degrees derived from previous & current location
    string date;           //
    int day;
    int month;
    int year;
    int fixtype;        // 0 = no fix;  1 = fix;  2=differential fix
    int satellites;     // number of satellites used
    float altitude;     //
    string fix; 
    string cardinal;
    float kph;
    
    //added by Ryan
    Serial _UltimateGps;
    int getGPRMC();
    int getGPGSA();
    int getGPGGA();
    void Init();
    void Sleep(int sleep);
    void coldStart();
    bool getData();
    char mode;          //manual or automatic
    int status;         //same as fixtype
    int NEMACount;
    int sentenceCount;
    int recordFlag;
    float PDOP;         //Position Dilution of Precision
    float HDOP;         //Horizontal Dilution of Precision
    float VDOP;         //Vertical Dilution of Precision
    double degLat;      //degrees latitude
    double degLon;      //degrees longitude
private:

    float trunc ( float v);
    //void getData();
    //Serial _UltimateGps;
    char NEMA[256];
};
#endif

/*
#define 1HZ_STREAM  "$PMTK220,1000*1F\r\n"  // 1.0 second interval
#define 5HZ_STREAM  "$PMTK220,200*2C\r\n"   // 0.2 second interval
#define 10HZ_STREAM "$PMTK220,100*2F\r\n"   // 0.1 second interval

#define OUTPUT_RMC    "$PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*29\r\n"
#define OUTPUT_RMCGGA "$PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*28\r\n"
#define OUTPUT_OFF    "$PMTK314,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*28\r\n"
*/