dotMorten/NmeaParser
1
0
Fork 0
mirror of https://github.com/dotMorten/NmeaParser.git synced 2026-02-04 06:44:27 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Improve start/stop handling of location datasource

Browse source
This commit is contained in:
Morten Nielsen 2020-07-28 21:06:48 -07:00
parent 63344030ee
commit 32f7455876
2 changed files with 25 additions and 18 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
src/SampleApp.WinDesktop/MainWindow.xaml.cs
View file

@ -77,6 +77,7 @@ namespace SampleApp.WinDesktop
((NmeaParser.SerialPortDevice)device).Port.PortName,
((NmeaParser.SerialPortDevice)device).Port.BaudRate);
}
_ = device.OpenAsync();
}
private void device_MessageReceived(object sender, NmeaParser.NmeaMessageReceivedEventArgs args)

42
src/SampleApp.WinDesktop/NmeaLocationDataSourcer.cs
View file

@ -6,20 +6,24 @@ namespace SampleApp.WinDesktop
{
public class NmeaLocationDataSource : Esri.ArcGISRuntime.Location.LocationDataSource
{
private NmeaParser.NmeaDevice device;
private static SpatialReference wgs84_ellipsoidHeight = SpatialReference.Create(4326, 115700);
private readonly NmeaParser.NmeaDevice m_device;
private double m_Accuracy = 0;
private double m_altitude = double.NaN;
private double m_speed = 0;
private double m_course = 0;
private bool supportGNMessages; // If device detect GN* messages, ignore all other Talker ID
private bool supportGGaMessages; //If device support GGA, ignore RMC for location
private bool m_startStopDevice;
private bool m_supportGNMessages; // If device detect GN* messages, ignore all other Talker ID
private bool m_supportGGaMessages; //If device support GGA, ignore RMC for location
public NmeaLocationDataSource(NmeaParser.NmeaDevice device)
public NmeaLocationDataSource(NmeaParser.NmeaDevice device, bool startStopDevice = true)
{
this.device = device;
if(device != null)
device.MessageReceived += device_MessageReceived;
if (device == null)
throw new ArgumentNullException(nameof(device));
this.m_device = device;
m_startStopDevice = startStopDevice;
}
void device_MessageReceived(object sender, NmeaParser.NmeaMessageReceivedEventArgs e)
{
var message = e.Message;
@ -32,8 +36,8 @@ namespace SampleApp.WinDesktop
double lat = 0;
double lon = 0;
if (message.TalkerId == NmeaParser.Talker.GlobalNavigationSatelliteSystem)
supportGNMessages = true;
else if(supportGNMessages && message.TalkerId != NmeaParser.Talker.GlobalNavigationSatelliteSystem)
m_supportGNMessages = true;
else if(m_supportGNMessages && message.TalkerId != NmeaParser.Talker.GlobalNavigationSatelliteSystem)
return; // If device supports combined GN* messages, ignore non-GN messages
if (message is NmeaParser.Messages.Garmin.Pgrme rme)
@ -61,15 +65,15 @@ namespace SampleApp.WinDesktop
{
lostFix = true;
}
isNewFix = !supportGGaMessages;
isNewFix = !m_supportGGaMessages;
}
else if (message is NmeaParser.Messages.Gga gga)
{
supportGGaMessages = true;
m_supportGGaMessages = true;
if (gga.Quality != NmeaParser.Messages.Gga.FixQuality.Invalid)
{
lat = Rmc.Latitude;
lon = Rmc.Longitude;
lat = gga.Latitude;
lon = gga.Longitude;
m_altitude = gga.Altitude + gga.GeoidalSeparation; //Convert to ellipsoidal height
}
if (gga.Quality == NmeaParser.Messages.Gga.FixQuality.Invalid || gga.Quality == NmeaParser.Messages.Gga.FixQuality.Estimated)
@ -89,20 +93,22 @@ namespace SampleApp.WinDesktop
m_Accuracy, m_speed, m_course, lostFix));
}
}
private static SpatialReference wgs84_ellipsoidHeight = SpatialReference.Create(4326, 115700);
protected override Task OnStartAsync()
{
if (device != null)
return this.device.OpenAsync();
m_device.MessageReceived += device_MessageReceived;
if (m_startStopDevice)
return this.m_device.OpenAsync();
else
return System.Threading.Tasks.Task<bool>.FromResult(true);
}
protected override Task OnStopAsync()
{
m_device.MessageReceived -= device_MessageReceived;
m_Accuracy = double.NaN;
if(this.device != null)
return this.device.CloseAsync();
if(m_startStopDevice)
return this.m_device.CloseAsync();
else
return System.Threading.Tasks.Task<bool>.FromResult(true);
}