nmea_gsv.c

the example file that can decode the NMEA protocol

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

#include "NMEA_Lib.h"


#if (NMEA_INCLUDE_GSV == 1)

#include "NMEA_GSV.h"


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

    if('G' == sentence[0] && 'S' == sentence[1] && 'V' == sentence[2])
    {
        sentenceToUINT8(sentence, &NMEAObject->GSVObject.TotalNumberOfMessages, &sentence_index, NMEA_GSV_TOTALNUMBEROFMESSAGES, flags);
        sentenceToUINT8(sentence, &NMEAObject->GSVObject.MessageNumber, &sentence_index, NMEA_GSV_MESSAGENUMBER, flags);
        sentenceToUINT8(sentence, &NMEAObject->GSVObject.SatellitesInView, &sentence_index, NMEA_GSV_SATELLITESINVIEW, flags);
        sentenceToUINT8(sentence, &NMEAObject->GSVObject.SatelliteNumber, &sentence_index, NMEA_GSV_SATELLITENUMBER, flags);
        sentenceToUINT8(sentence, &NMEAObject->GSVObject.ElevationInDegrees, &sentence_index, NMEA_GSV_ELEVATIONINDEGREES, flags);
        sentenceToUINT8(sentence, &NMEAObject->GSVObject.AzimuthInDegreesToTrue, &sentence_index, NMEA_GSV_AZIMUTHINDEGREESTOTRUE, flags);
        sentenceToUINT8(sentence, &NMEAObject->GSVObject.SNRindB, &sentence_index, NMEA_GSV_SNRINDB, flags);
    }
    return ret_val;
}


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

    sentence[0] = 'G';
    sentence[1] = 'S';
    sentence[2] = 'V';

    sentenceFromUINT8(sentence, &NMEAObject->GSVObject.TotalNumberOfMessages, &sentence_index, NMEA_GSV_TOTALNUMBEROFMESSAGES, flags);
    sentenceFromUINT8(sentence, &NMEAObject->GSVObject.MessageNumber, &sentence_index, NMEA_GSV_MESSAGENUMBER, flags);
    sentenceFromUINT8(sentence, &NMEAObject->GSVObject.SatellitesInView, &sentence_index, NMEA_GSV_SATELLITESINVIEW, flags);
    sentenceFromUINT8(sentence, &NMEAObject->GSVObject.SatelliteNumber, &sentence_index, NMEA_GSV_SATELLITENUMBER, flags);
    sentenceFromUINT8(sentence, &NMEAObject->GSVObject.ElevationInDegrees, &sentence_index, NMEA_GSV_ELEVATIONINDEGREES, flags);
    sentenceFromUINT8(sentence, &NMEAObject->GSVObject.AzimuthInDegreesToTrue, &sentence_index, NMEA_GSV_AZIMUTHINDEGREESTOTRUE, flags);
    sentenceFromUINT8(sentence, &NMEAObject->GSVObject.SNRindB, &sentence_index, NMEA_GSV_SNRINDB, flags);
    return ret_val;
}

#endif