gps.h

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#ifndef GPS_H
#define GPS_H
 
#define NUMBERS_OF_SENTENCE 4

#define NUMBERS_OF_SENTENCE_MAX 10

// PMTK300 : controls how often the module checks the satellites and updates its position registers
// PMTK220 : controls how often the GPS module emits NMEA sentences
// PMTK314 : controls how often the GPS module emits NMEA each sentences (17 supported NMEA sentences individually)

// send sentences every X seconds

#define RATE_1SEC "$PMTK220,1000*1F\r\n"

#define RATE_2SEC "$PMTK220,2000*1C\r\n"

#define RATE_5SEC "$PMTK220,5000*1B\r\n"

#define RATE_10SEC "$PMTK220,10000*2F\r\n"

#define DISABLE_ALL "$PMTK314,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*28\r\n"

#define TURN_ALL "$PMTK314,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0*28\r\n"

#define GGA_RMC "$PMTK314,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*28\r\n"

#define RMC_ONLY "$PMTK314,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0*29\r\n"

typedef struct gps_data {
    float latitude;
    float longitude;
    float speed;
    float heading;
} gps_data;

extern unsigned int dataValid;

extern struct gps_data GPSData;

void toggleGPS(unsigned int state);

void toggleGPSInterrupt(unsigned int state);

void enableUSARTforGPS(void);

void gpsSend(char* message);

void usart0_rx(void);

float calcDistance(float lat1, float lon1, float lat2, float lon2);

float deg2rad(float deg);

#endif