/**
* Parses a RMC sentence
*
* $--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
* @param String Input string
* @param params Parameter array
* @param nparams Number of parameters
* @param info NMEA_INFO struct to parse into
* @return Parsing success
*/
bool
NMEAParser::RMC(NMEAInputLine &line, NMEAInfo &info)
{
fixed ThisTime = line.read(fixed_zero);
bool gpsValid = !NAVWarn(line.read_first_char());
GeoPoint location;
bool valid_location = ReadGeoPoint(line, location);
GPSState &gps = info.gps;
fixed speed;
bool GroundSpeedAvailable = line.read_checked(speed);
fixed track;
bool track_available = line.read_checked(track);
// JMW get date info first so TimeModify is accurate
if (ReadDate(line, info.date_time_utc))
info.date_available = true;
ThisTime = TimeModify(ThisTime, info.date_time_utc, info.date_available);
ThisTime = TimeAdvanceTolerance(ThisTime);
if (!TimeHasAdvanced(ThisTime, info))
return true;
if (!gpsValid)
info.location_available.Clear();
else if (valid_location)
info.location_available.Update(info.clock);
if (valid_location)
info.location = location;
if (GroundSpeedAvailable) {
info.ground_speed = Units::ToSysUnit(speed, unKnots);
info.ground_speed_available.Update(info.clock);
}
if (track_available && info.MovementDetected()) {
// JMW don't update bearing unless we're moving
info.track = Angle::degrees(track).as_bearing();
info.track_available.Update(info.clock);
}
if (!GGAAvailable) {
// update SatInUse, some GPS receiver don't emit GGA sentence
gps.satellites_used = -1;
}
info.gps.real = real;
#ifdef ANDROID
info.gps.android_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;
}
