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Update VTG parsing for NMEA0183 version 2.3 and later #3

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Update VTG parsing for NMEA0183 version 2.3 and later #3

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a6292f2
Update VTG.HPP for NMEA0183 ver 2.3 and later
SivertHavso Feb 3, 2022
8ea7704
Update VTG.CPP for NMEA0183 ver 2.3 and later
SivertHavso Feb 3, 2022
2e7edb5
Add missing assignment for FAA mode
SivertHavso Feb 3, 2022
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1 change: 1 addition & 0 deletions RMC.CPP
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Original file line number Diff line number Diff line change
Expand Up @@ -163,6 +163,7 @@ RMC const& RMC::operator = ( RMC const& source ) noexcept
Date = source.Date;
MagneticVariation = source.MagneticVariation;
MagneticVariationDirection = source.MagneticVariationDirection;
FAAMode = source.FAAMode;

return( *this );
}
24 changes: 22 additions & 2 deletions VTG.CPP
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Expand Up @@ -65,12 +65,31 @@ bool VTG::Parse( SENTENCE const& sentence ) noexcept
/*
** First we check the checksum...
*/

int checksum_field = 9;

// Version 2.3 of the standard has things different

FAAMode = sentence.FAAMode(9);

if (FAAMode != FAA_MODE::ModeUnknown)
{
checksum_field = 10;
}

auto const check = sentence.IsChecksumBad(checksum_field);

if ( sentence.IsChecksumBad( 9 ) == NMEA0183_BOOLEAN::True )
if ( check == NMEA0183_BOOLEAN::True )
{
SetErrorMessage(STRING_VIEW("Invalid Checksum"));
return( false );
}
}

if (check == NMEA0183_BOOLEAN::NMEA_Unknown)
{
SetErrorMessage(STRING_VIEW("Missing Checksum"));
return(false);
}

TrackDegreesTrue = sentence.Double( 1 );
TrackDegreesMagnetic = sentence.Double( 3 );
Expand Down Expand Up @@ -108,6 +127,7 @@ VTG const& VTG::operator = ( VTG const& source ) noexcept
TrackDegreesMagnetic = source.TrackDegreesMagnetic;
SpeedKnots = source.SpeedKnots;
SpeedKilometersPerHour = source.SpeedKilometersPerHour;
FAAMode = source.FAAMode;

return( *this );
}
9 changes: 5 additions & 4 deletions VTG.HPP
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Expand Up @@ -44,10 +44,11 @@ class VTG : public RESPONSE
** Data
*/

double TrackDegreesTrue{ 0.0 };
double TrackDegreesMagnetic{ 0.0 };
double SpeedKnots{ 0.0 };
double SpeedKilometersPerHour{ 0.0 };
double TrackDegreesTrue{ 0.0 };
double TrackDegreesMagnetic{ 0.0 };
double SpeedKnots{ 0.0 };
double SpeedKilometersPerHour{ 0.0 };
FAA_MODE FAAMode{ FAA_MODE::ModeUnknown };

/*
** Methods
Expand Down