bool GGA::Parse( const SENTENCE& sentence )
{
// ASSERT_VALID( this );
/*
** GGA - Global Positioning System Fix Data
** Time, Position and fix related data fora GPS receiver.
**
** 11
** 1 2 3 4 5 6 7 8 9 10 | 12 13 14 15
** | | | | | | | | | | | | | | |
** $--GGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh<CR><LF>
**
** Field Number:
** 1) Universal Time Coordinated (UTC)
** 2) Latitude
** 3) N or S (North or South)
** 4) Longitude
** 5) E or W (East or West)
** 6) GPS Quality Indicator,
** 0 - fix not available,
** 1 - GPS fix,
** 2 - Differential GPS fix
** 7) Number of satellites in view, 00 - 12
** 8) Horizontal Dilution of precision
** 9) Antenna Altitude above/below mean-sea-level (geoid)
** 10) Units of antenna altitude, meters
** 11) Geoidal separation, the difference between the WGS-84 earth
** ellipsoid and mean-sea-level (geoid), "-" means mean-sea-level
** below ellipsoid
** 12) Units of geoidal separation, meters
** 13) Age of differential GPS data, time in seconds since last SC104
** type 1 or 9 update, null field when DGPS is not used
** 14) Differential reference station ID, 0000-1023
** 15) Checksum
*/
/*
** First we check the checksum...
*/
if ( sentence.IsChecksumBad( 15 ) ==NTrue )
{
SetErrorMessage( _T("Invalid Checksum" ));
return( FALSE );
}
UTCTime = sentence.Field( 1 );
Position.Parse( 2, 3, 4, 5, sentence );
GPSQuality = sentence.Integer( 6 );
NumberOfSatellitesInUse = sentence.Integer( 7 );
HorizontalDilutionOfPrecision = sentence.Double( 8 );
AntennaAltitudeMeters = sentence.Double( 9 );
GeoidalSeparationMeters = sentence.Double( 11 );
AgeOfDifferentialGPSDataSeconds = sentence.Double( 13 );
DifferentialReferenceStationID = sentence.Integer( 14 );
return( TRUE );
}
BOOL STN::Parse( const SENTENCE& sentence )
{
ASSERT_VALID( this );
/*
** STN - Multiple Data ID
**
** 1 2
** | |
** $--STN,x.x,*hh<CR><LF>
**
** Field Number:
** 1) Talker ID Number
** 2) Checksum
*/
/*
** First we check the checksum...
*/
if ( sentence.IsChecksumBad( 2 ) == True )
{
SetErrorMessage( "Invalid Checksum" );
return( FALSE );
}
TalkerIDNumber = sentence.Integer( 1 );
return( TRUE );
}
bool VWE::Parse( const SENTENCE& sentence )
{
/*
** VWE - Wind Track Efficiency
**
** 1 2
** | |
** $--VWE,x.x,*hh<CR><LF>
**
** Field Number:
** 1) Efficiency, Percent
** 2) Checksum
*/
/*
** First we check the checksum...
*/
if ( sentence.IsChecksumBad( 2 ) == True )
{
SetErrorMessage( "Invalid Checksum" );
return( false );
}
EfficiencyPercent = sentence.Integer( 1 );
return( true );
}
void SATELLITE_DATA::Parse( int first_field_number, const SENTENCE& sentence )
{
SatelliteNumber = sentence.Integer( first_field_number );
ElevationDegrees = sentence.Integer( first_field_number + 1 );
AzimuthDegreesTrue = sentence.Integer( first_field_number + 2 );
std::string field_data = sentence.Field( first_field_number + 3 );
if ( field_data == "" )
{
SignalToNoiseRatio = (-1);
}
else
{
SignalToNoiseRatio = sentence.Integer( first_field_number + 3 );
}
}
bool TRF::Parse( const SENTENCE& sentence )
{
/*
** TRF - TRANSIT Fix Data
** 13
** 1 2 3 4 5 6 7 8 9 10 11 12|
** | | | | | | | | | | | | |
** $--TRF,hhmmss.ss,xxxxxx,llll.ll,a,yyyyy.yy,a,x.x,x.x,x.x,x.x,xxx,A*hh<CR><LF>
**
** Field Number:
** 1) UTC Time
** 2) Date, ddmmyy
** 3) Latitude
** 4) N or S
** 5) Longitude
** 6) E or W
** 7) Elevation Angle
** 8) Number of iterations
** 9) Number of Doppler intervals
** 10) Update distance, nautical miles
** 11) Satellite ID
** 12) Data Validity
** 13) Checksum
*/
/*
** First we check the checksum...
*/
if ( sentence.IsChecksumBad( 13 ) == True )
{
SetErrorMessage( "Invalid Checksum" );
return( false );
}
UTCTime = sentence.Field( 1 );
Time = sentence.Time( 1 );
Date = sentence.Field( 2 );
Position.Parse( 3, 4, 5, 6, sentence );
ElevationAngle = sentence.Double( 7 );
NumberOfIterations = sentence.Double( 8 );
NumberOfDopplerIntervals = sentence.Double( 9 );
UpdateDistanceNauticalMiles = sentence.Double( 10 );
SatelliteID = sentence.Integer( 11 );
IsDataValid = sentence.Boolean( 12 );
return( true );
}
bool GSV::Parse( const SENTENCE& sentence )
{
/*
$GPGSV,2,1,08,01,40,083,46,02,17,308,41,12,07,344,39,14,22,228,45*75
Where:
GSV Satellites in view
2 Number of sentences for full data
1 sentence 1 of 2
08 Number of satellites in view
01 Satellite PRN number
40 Elevation, degrees
083 Azimuth, degrees
46 SNR - higher is better
for up to 4 satellites per sentence
*75 the checksum data, always begins with *
*/
/*
** GSV - GPS satellite Status
**
** 1 2 3 4 5 6 7 n
** | | | | | | | |
** $--GSV,x,x,x,x,x,x,x.........*hh<CR><LF>
**
** Field Number:
** 1) Number of sentences for full data
** 2) sentence number
** 3) Number of satellites in view
** 4) Satellite PRN number
** 5) Elevation, degrees
** 6) Azimuth, degrees
** 7) SNR - higher is better
** Fields 4-7 may repeat up to 4 times per sentence
** n) Checksum
*/
/*
** Ignore the checksum...
*/
SatsInView = sentence.Integer( 3 );
return( TRUE );
}
bool RPM::Parse( const SENTENCE& sentence )
{
/*
** RPM - Revolutions
**
** 1 2 3 4 5 6
** | | | | | |
** $--RPM,a,x,x.x,x.x,A*hh<CR><LF>
**
** Field Number:
** 1) Sourse, S = Shaft, E = Engine
** 2) Engine or shaft number
** 3) Speed, Revolutions per minute
** 4) Propeller pitch, % of maximum, "-" means astern
** 5) Status, A means data is valid
** 6) Checksum
*/
/*
** First we check the checksum...
*/
if ( sentence.IsChecksumBad( 6 ) == True )
{
SetErrorMessage( "Invalid Checksum" );
return( false );
}
Source = sentence.Field( 1 );
SourceNumber = sentence.Integer( 2 );
RevolutionsPerMinute = sentence.Double( 3 );
PropellerPitchPercentage = sentence.Double( 4 );
IsDataValid = sentence.Boolean( 5 );
return( true );
}
bool ZLZ::Parse( const SENTENCE& sentence )
{
/*
** ZLZ - Time of Day
** UTC, local time, zone
**
** 1 2 3 4
** | | | |
** $--ZLZ,hhmmss.ss,hhmmss.ss,xx*hh<CR><LF>
**
** 1) Universal Time Coordinated (UTC)
** 2) Local Time
** 3) Local Zone Description, number of whole hours added to local time to obtain GMT
** 4) Checksum
*/
/*
** First we check the checksum...
*/
if ( sentence.IsChecksumBad( 4 ) == True )
{
SetErrorMessage( "Invalid Checksum" );
return( false );
}
time_t temp_time = time(nullptr);
struct tm * tm_p = gmtime(&temp_time);
int year = tm_p->tm_year + 1900;
int month = tm_p->tm_mon;
int day = tm_p->tm_mday;
UTCTimeString = sentence.Field( 1 );
char temp_number[ 3 ];
temp_number[ 2 ] = 0x00;
temp_number[ 0 ] = UTCTimeString[ 0 ];
temp_number[ 1 ] = UTCTimeString[ 1 ];
int hours = ::atoi( temp_number );
temp_number[ 0 ] = UTCTimeString[ 2 ];
temp_number[ 1 ] = UTCTimeString[ 3 ];
int minutes = ::atoi( temp_number );
temp_number[ 0 ] = UTCTimeString[ 4 ];
temp_number[ 1 ] = UTCTimeString[ 5 ];
int seconds = ::atoi( temp_number );
UTCTime = ctime( year, month, day, hours, minutes, seconds );
LocalTimeString = sentence.Field( 2 );
temp_number[ 0 ] = LocalTimeString[ 0 ];
temp_number[ 1 ] = LocalTimeString[ 1 ];
hours = ::atoi( temp_number );
temp_number[ 0 ] = LocalTimeString[ 2 ];
temp_number[ 1 ] = LocalTimeString[ 3 ];
minutes = ::atoi( temp_number );
temp_number[ 0 ] = LocalTimeString[ 4 ];
temp_number[ 1 ] = LocalTimeString[ 5 ];
seconds = ::atoi( temp_number );
LocalTime = ctime( year, month, day, hours, minutes, seconds );
LocalHourDeviation = sentence.Integer( 3 );
return( true );
}
bool RTE::Parse( const SENTENCE& sentence )
{
/*
** RTE - Routes
**
** 1 2 3 4 5 x n
** | | | | | | |
** $--RTE,x.x,x.x,a,c--c,c--c, ..... c--c*hh<CR><LF>
**
** Field Number:
** 1) Total number of messages being transmitted
** 2) Message Number
** 3) Message mode
** c = complete route, all waypoints
** w = working route, the waypoint you just left, the waypoint you're heading to then all the rest
** 4) Waypoint ID
** x) More Waypoints
** n) Checksum
*/
delete_all_entries();
int field_number = 1;
total_number_of_messages = sentence.Integer( 1 );
// total_number_of_messages = sentence.Double( 1 );
int this_message_number = sentence.Integer( 2 );
// double this_message_number = sentence.Double( 2 );
if ( this_message_number == 1 )
{
/*
** Make sure we've got a clean list
*/
delete_all_entries();
}
if ( sentence.Field( 3 ).StartsWith(_T("c")) )
{
TypeOfRoute = CompleteRoute;
}
else if ( sentence.Field( 3 ).StartsWith(_T("w")))
{
TypeOfRoute = WorkingRoute;
}
else
{
TypeOfRoute = RouteUnknown;
}
RouteName = sentence.Field( 4 );
int number_of_data_fields = sentence.GetNumberOfDataFields();
field_number = 5;
while( field_number < number_of_data_fields )
{
Waypoints.Add( ( sentence.Field( field_number ) )) ;
field_number++;
}
return( TRUE );
}
bool GSV::Parse( const SENTENCE& sentence )
{
/*
$GPGSV,2,1,08,01,40,083,46,02,17,308,41,12,07,344,39,14,22,228,45*75
Where:
GSV Satellites in view
2 Number of sentences for full data
1 sentence 1 of 2
08 Number of satellites in view
01 Satellite PRN number
40 Elevation, degrees
083 Azimuth, degrees
46 SNR - higher is better
for up to 4 satellites per sentence
*75 the checksum data, always begins with *
*/
/*
** GSV - GPS satellite Status
**
** 1 2 3 4 5 6 7 n
** | | | | | | | |
** $--GSV,x,x,x,x,x,x,x.........*hh<CR><LF>
**
** Field Number:
** 1) Number of sentences for full data
** 2) sentence number
** 3) Number of satellites in view
** 4) Satellite PRN number
** 5) Elevation, degrees
** 6) Azimuth, degrees
** 7) SNR - higher is better
** Fields 4-7 may repeat up to 4 times per sentence
** n) Checksum
*/
/*
** First we check the checksum...
*/
int cksumFieldNr = 0;
int satInfoCnt = 0;
switch (sentence.GetNumberOfDataFields())
{
case 19:
cksumFieldNr = 20;
satInfoCnt = 4;
break;
case 15:
cksumFieldNr = 16;
satInfoCnt = 3;
break;
case 11:
cksumFieldNr = 12;
satInfoCnt = 2;
break;
case 7:
cksumFieldNr = 8;
satInfoCnt = 1;
break;
default:
SetErrorMessage( _T("Invalid Field count" ));
return( FALSE );
}
if ( sentence.IsChecksumBad( cksumFieldNr ) == NTrue )
{
SetErrorMessage( _T("Invalid Checksum" ));
return( FALSE );
}
NumberOfMessages = sentence.Integer( 1 );
MessageNumber = sentence.Integer( 2 );
SatsInView = sentence.Integer( 3 );
for (int idx = 0; idx < satInfoCnt; idx++)
{
SatInfo[idx].SatNumber = sentence.Integer( idx*4+4 );
SatInfo[idx].ElevationDegrees = sentence.Integer( idx*4+5 );
SatInfo[idx].AzimuthDegreesTrue = sentence.Integer( idx*4+6 );
SatInfo[idx].SignalToNoiseRatio = sentence.Integer( idx*4+7 );
}
return( TRUE );
}
