static bool
PZAN3(NMEAInputLine &line, NMEAInfo &info)
{
// old: $PZAN3,+,026,V,321,035,A,321,035,V*cc
// new: $PZAN3,+,026,A,321,035,V[,A]*cc
line.Skip(3);
int direction, speed;
if (!line.ReadChecked(direction) || !line.ReadChecked(speed))
return false;
char okay = line.ReadFirstChar();
if (okay == 'V') {
okay = line.ReadFirstChar();
if (okay == 'V')
return true;
if (okay != 'A') {
line.Skip();
okay = line.ReadFirstChar();
}
}
if (okay == 'A') {
SpeedVector wind(Angle::Degrees(direction),
Units::ToSysUnit(fixed(speed), Unit::KILOMETER_PER_HOUR));
info.ProvideExternalWind(wind);
}
return true;
}
static bool
ReadFixedAndChar(NMEAInputLine &line, fixed &d, char &ch)
{
bool success = line.ReadChecked(d);
ch = line.ReadFirstChar();
return success;
}
static bool
ReadAltitude(NMEAInputLine &line, fixed &value_r)
{
fixed value;
bool available = line.ReadChecked(value);
char unit = line.ReadFirstChar();
if (!available)
return false;
if (unit == _T('f') || unit == _T('F'))
value = Units::ToSysUnit(value, Unit::FEET);
value_r = value;
return true;
}
bool
NMEAParser::GLL(NMEAInputLine &line, NMEAInfo &info)
{
/*
* $--GLL,llll.ll,a,yyyyy.yy,a,hhmmss.ss,a,m,*hh
*
* Field Number:
* 1) Latitude
* 2) N or S (North or South)
* 3) Longitude
* 4) E or W (East or West)
* 5) Universal Time Coordinated (UTC)
* 6) Status A - Data Valid, V - Data Invalid
* 7) FAA mode indicator (NMEA 2.3 and later)
* 8) Checksum
*/
GeoPoint location;
bool valid_location = ReadGeoPoint(line, location);
fixed this_time;
if (!ReadTime(line, info.date_time_utc, this_time))
return true;
bool gps_valid = !NAVWarn(line.ReadFirstChar());
if (!TimeHasAdvanced(this_time, info))
return true;
if (!gps_valid)
info.location_available.Clear();
else if (valid_location)
info.location_available.Update(info.clock);
if (valid_location)
info.location = location;
info.gps.real = real;
#if defined(ANDROID) || defined(__APPLE__)
info.gps.nonexpiring_internal_gps = false;
#endif
return true;
}
bool
NMEAParser::RMC(NMEAInputLine &line, NMEAInfo &info)
{
/*
* $--RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,xxxx,x.x,a,m,*hh
*
* Field Number:
* 1) UTC Time
* 2) Status, V=Navigation receiver warning A=Valid
* 3) Latitude
* 4) N or S
* 5) Longitude
* 6) E or W
* 7) Speed over ground, knots
* 8) Track made good, degrees true
* 9) Date, ddmmyy
* 10) Magnetic Variation, degrees
* 11) E or W
* 12) FAA mode indicator (NMEA 2.3 and later)
* 13) Checksum
*/
fixed this_time;
if (!ReadTime(line, info.date_time_utc, this_time))
return true;
bool gps_valid = !NAVWarn(line.ReadFirstChar());
GeoPoint location;
bool valid_location = ReadGeoPoint(line, location);
fixed speed;
bool ground_speed_available = line.ReadChecked(speed);
Angle track;
bool track_available = ReadBearing(line, track);
// JMW get date info first so TimeModify is accurate
ReadDate(line, info.date_time_utc);
Angle variation;
bool variation_available = ReadVariation(line, variation);
if (!TimeHasAdvanced(this_time, info))
return true;
if (!gps_valid)
info.location_available.Clear();
else if (valid_location)
info.location_available.Update(info.clock);
if (valid_location)
info.location = location;
if (ground_speed_available) {
info.ground_speed = Units::ToSysUnit(speed, Unit::KNOTS);
info.ground_speed_available.Update(info.clock);
}
if (track_available && info.MovementDetected()) {
// JMW don't update bearing unless we're moving
info.track = track;
info.track_available.Update(info.clock);
}
if (!variation_available)
info.variation_available.Clear();
else if (variation_available) {
info.variation = variation;
info.variation_available.Update(info.clock);
}
info.gps.real = real;
#if defined(ANDROID) || defined(__APPLE__)
info.gps.nonexpiring_internal_gps = false;
#endif
return true;
}