nmea_gga.c

the example file that can decode the NMEA protocol

#include <stdlib.h>
#include <string.h>

#include "NMEA_Lib.h"


#if (NMEA_INCLUDE_GGA == 1)

#include "NMEA_GGA.h"


BOOL NMEA_ParseGGASentence(CHAR * sentence, struct NMEAObject_t * NMEAObject, UINT32 * flags)
{
    UINT32 sentence_index = 3;
    BOOL ret_val = NMEA_FAILURE;

    if('G' == sentence[0] && 'G' == sentence[1] && 'A' == sentence[2])
    {
        sentenceToUTC(sentence, &NMEAObject->GGAObject.UniversalTimeCoordinated, &sentence_index, NMEA_GGA_UNIVERSALTIMECOORDINATED, flags);
        sentenceToPOINT(sentence, &NMEAObject->GGAObject.Latitude, &sentence_index, NMEA_GGA_LATITUDE, flags);
        sentenceToCHAR(sentence, &NMEAObject->GGAObject.NorthOrSouth, &sentence_index, NMEA_GGA_NORTHORSOUTH, flags);
        sentenceToPOINT(sentence, &NMEAObject->GGAObject.Longitude, &sentence_index, NMEA_GGA_LONGITUDE, flags);
        sentenceToCHAR(sentence, &NMEAObject->GGAObject.EastOrWest, &sentence_index, NMEA_GGA_EASTORWEST, flags);
        sentenceToCHAR(sentence, &NMEAObject->GGAObject.GPSQualityIndicator, &sentence_index, NMEA_GGA_GPSQUALITYINDICATOR, flags);
        sentenceToUINT8(sentence, &NMEAObject->GGAObject.NumberOfSatellitesInView, &sentence_index, NMEA_GGA_NUMBEROFSATELLITESINVIEW, flags);
        sentenceToPOINT(sentence, &NMEAObject->GGAObject.HorizontalDilutionOfPrecision, &sentence_index, NMEA_GGA_HORIZONTALDILUTIONOFPRECISION, flags);
        sentenceToPOINT(sentence, &NMEAObject->GGAObject.AntennaAltitudeAboveBelowMeansealevel, &sentence_index, NMEA_GGA_ANTENNAALTITUDEABOVEBELOWMEANSEALEVEL, flags);
        sentenceToCHAR(sentence, &NMEAObject->GGAObject.UnitsOfAntennaAltitude, &sentence_index, NMEA_GGA_UNITSOFANTENNAALTITUDE, flags);
        sentenceToPOINT(sentence, &NMEAObject->GGAObject.GeoidalSeparation, &sentence_index, NMEA_GGA_GEOIDALSEPARATION, flags);
        sentenceToCHAR(sentence, &NMEAObject->GGAObject.UnitsOfGeoidalSeparation, &sentence_index, NMEA_GGA_UNITSOFGEOIDALSEPARATION, flags);
        sentenceToPOINT(sentence, &NMEAObject->GGAObject.AgeOfDifferentialGPSData, &sentence_index, NMEA_GGA_AGEOFDIFFERENTIALGPSDATA, flags);
        sentenceToUINT32(sentence, &NMEAObject->GGAObject.DifferentialReferenceStationID, &sentence_index, NMEA_GGA_DIFFERENTIALREFERENCESTATIONID, flags);
    }
    return ret_val;
}


BOOL NMEA_CreateGGASentence(CHAR * sentence, struct NMEAObject_t * NMEAObject, UINT32 * flags)
{
    UINT32 sentence_index = 3;
    BOOL ret_val = NMEA_FAILURE;

    sentence[0] = 'G';
    sentence[1] = 'G';
    sentence[2] = 'A';

    sentenceFromUTC(sentence, &NMEAObject->GGAObject.UniversalTimeCoordinated, &sentence_index, NMEA_GGA_UNIVERSALTIMECOORDINATED, flags);
    sentenceFromPOINT(sentence, &NMEAObject->GGAObject.Latitude, &sentence_index, NMEA_GGA_LATITUDE, flags);
    sentenceFromCHAR(sentence, &NMEAObject->GGAObject.NorthOrSouth, &sentence_index, NMEA_GGA_NORTHORSOUTH, flags);
    sentenceFromPOINT(sentence, &NMEAObject->GGAObject.Longitude, &sentence_index, NMEA_GGA_LONGITUDE, flags);
    sentenceFromCHAR(sentence, &NMEAObject->GGAObject.EastOrWest, &sentence_index, NMEA_GGA_EASTORWEST, flags);
    sentenceFromCHAR(sentence, &NMEAObject->GGAObject.GPSQualityIndicator, &sentence_index, NMEA_GGA_GPSQUALITYINDICATOR, flags);
    sentenceFromUINT8(sentence, &NMEAObject->GGAObject.NumberOfSatellitesInView, &sentence_index, NMEA_GGA_NUMBEROFSATELLITESINVIEW, flags);
    sentenceFromPOINT(sentence, &NMEAObject->GGAObject.HorizontalDilutionOfPrecision, &sentence_index, NMEA_GGA_HORIZONTALDILUTIONOFPRECISION, flags);
    sentenceFromPOINT(sentence, &NMEAObject->GGAObject.AntennaAltitudeAboveBelowMeansealevel, &sentence_index, NMEA_GGA_ANTENNAALTITUDEABOVEBELOWMEANSEALEVEL, flags);
    sentenceFromCHAR(sentence, &NMEAObject->GGAObject.UnitsOfAntennaAltitude, &sentence_index, NMEA_GGA_UNITSOFANTENNAALTITUDE, flags);
    sentenceFromPOINT(sentence, &NMEAObject->GGAObject.GeoidalSeparation, &sentence_index, NMEA_GGA_GEOIDALSEPARATION, flags);
    sentenceFromCHAR(sentence, &NMEAObject->GGAObject.UnitsOfGeoidalSeparation, &sentence_index, NMEA_GGA_UNITSOFGEOIDALSEPARATION, flags);
    sentenceFromPOINT(sentence, &NMEAObject->GGAObject.AgeOfDifferentialGPSData, &sentence_index, NMEA_GGA_AGEOFDIFFERENTIALGPSDATA, flags);
    sentenceFromUINT32(sentence, &NMEAObject->GGAObject.DifferentialReferenceStationID, &sentence_index, NMEA_GGA_DIFFERENTIALREFERENCESTATIONID, flags);
    return ret_val;
}

#endif