gps.h

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#ifndef __SIMPLE_NMEA_PARSER__
#define __SIMPLE_NMEA_PARSER__

#if defined(__cplusplus)
#extern "C" {
#endif


#include "simpletools.h"
#include "fdserial.h"

#define KNOTS          0
#define MPH            1
#define KPH            2
#define MPS            3

#define GPS_TRUE       1
#define GPS_FALSE      0

#define GPS_INBUFF_SIZE    128  //needs to be big enough to hold an entire NMEA sentence and a few estra bytes



//Type definitions
typedef unsigned char gps_byte_t;

typedef struct nmea_data_s
{
  int fix;            //fix quality, 0=invalid, 1=GPS, 2=DGPS, etc...
  int fix_valid;      //boolean indicating a valid GPS fix
  float lat_dds;      //current latitude in decimal degress
  float lon_dds;      //current longitude in decimal degrees
  int sats_tracked;   //current number of satellites tracked by the GPS
  float altitude;     //current altitude, in meters, as float
  float heading;      //current direction of travel, in degrees, as float
  float velocity;     //current speed if travel, in knots, as float
  float date;         //current date, raw format with tenths of second, as float
  int time;           //current UTC time, raw format, as integer
  float mag_var;      //current magnetic variation, as float

} nmea_data;

int gps_open(int gpsSin, int gpsSout, int gps_baud);

int gps_changeBaud(int newBaudRate);


void gps_close();


float gps_latitude();


float gps_longitude();


int gps_fix();


int gps_fixValid();


int gps_satsTracked();


float gps_altitude();


float gps_heading();


float gps_velocity(int units_type);


int gps_rawDate();


int gps_rawTime();


float gps_magneticVariation();

//Private functions

#if defined(__cplusplus)
}
#endif
//  end __cplusplus

#endif
//  end __SIMPLE_NMEA_PARSER__ redefinition guard