private void InitializeGpsVariables()
{
//Set up delegates for each string type to be used
m_DelegateParseGSV = new DelegateParseGSV(ParseGSV);
m_DelegateParseGGA = new DelegateParseGGA(ParseGGA);
m_DelegateParseGSA = new DelegateParseGSA(ParseGSA);
m_DelegateParseRMC = new DelegateParseRMC(ParseRMC);
//Add the delegates to the dictionary to be called for each type
ParsingFunctions = new Dictionary<NmeaString, Delegate>();
ParsingFunctions.Add(NmeaString.GSV, m_DelegateParseGSV);
ParsingFunctions.Add(NmeaString.GSA, m_DelegateParseGSA);
ParsingFunctions.Add(NmeaString.GGA, m_DelegateParseGGA);
ParsingFunctions.Add(NmeaString.RMC, m_DelegateParseRMC);
Error = GpsErrorType.NoError;
_bursts = 0;
_UseFile = false;
FileOpen = false;
GpsFile = String.Empty;
}
//GPS Connection and Read
private void GpsWorker(object o)
{
_UseFile = false;
NmeaBurst burst = new NmeaBurst();
_bursts = 0;
try
{
#region File
if (!Port.ToLower().Contains("com"))
{
_UseFile = true;
GpsFile = Port;
try
{
try
{
sr = new StreamReader(GpsFile);
FileOpen = true;
}
catch(Exception ex)
{
TtUtils.WriteError(ex.Message, String.Format("GpsAccess:GpsWorker:OpenFile [{0}]", GpsFile), ex.StackTrace);
Error = GpsErrorType.FileOpenError;
if (GpsError != null)
GpsError();
Cancel();
return;
}
if (sr.Peek() < 1)
{
Error = GpsErrorType.FileNull;
if (GpsError != null)
GpsError();
Cancel();
return;
}
while (true)
{
if (_cancelled)
{
Cancel();
return;
}
try
{
sentence = sr.ReadLine();
if (sentence == null)
{
sr.Close();
FileOpen = false;
sr = new StreamReader(GpsFile);
FileOpen = true;
sentence = sr.ReadLine();
}
sentence = sentence.Trim();
}
catch (Exception ex)
{
TtUtils.WriteError(ex.Message, "GpsAccess:GpsWorker:Readline", ex.StackTrace);
Error = GpsErrorType.FileReadError;
if (GpsError != null)
GpsError();
Cancel();
return;
}
//create new burst if no burst or prev burst was completed
if (burst == null || burst.complete)
{
burst = new NmeaBurst();
}
ParseSentence(sentence, ref burst);
//if all lines are parsed mark as complete
if (burst != null)
{
if (burst.bGGA && burst.bGSA && burst.bGSV && burst.bRMC)
burst.Complete();
}
//trigger complete burst completed
#region Trigger NmeaBurstReceived Event
if (burst != null && !_cancelled && burst.complete)
{
_bursts++;
try
{
OnBurstReceived(burst);
}
catch (Exception ex)
{
TtUtils.WriteError(ex.Message, "GpsAccess:GpsWorker:BurstReceived:Delegate", ex.StackTrace);
Error = GpsErrorType.BurstDelegateError;
if (GpsError != null)
GpsError();
Cancel();
return;
}
Thread.Sleep(1000);
}
#endregion
}
}
catch (IOException ioEx)
{
TtUtils.WriteError(ioEx.Message, "GpsAccess:GpsWorker(IO)", ioEx.StackTrace);
Error = GpsErrorType.UnknownFileError;
if (GpsError != null)
GpsError();
Cancel();
}
catch (Exception ex)
{
TtUtils.WriteError(ex.Message, "GpsAccess:GpsWorker", ex.StackTrace);
Error = GpsErrorType.UnknownError;
if (GpsError != null)
GpsError();
Cancel();
}
}
#endregion
#region GpsDevice
else
{
_port = new SerialPort(Port, Rate);
_port.Parity = Parity.None;
_port.StopBits = StopBits.One;
_port.DataBits = 8;
_port.Handshake = Handshake.None;
_port.ReadTimeout = Values.Settings.DeviceOptions.GpsTimeout;
_port.Open();
ignoreFirst = true; //ignore first GPS string (bad data)
#region Trigger Event
//Trigger Event
if (GpsStarted != null)
{
GpsStarted();
}
#endregion
if (_test)
{
sentence = _port.ReadLine().TrimEx();
_test = false;
}
else
{
sentence = SyncGps().TrimEx();
}
while (true)
{
//create new burst if no burst or prev burst was completed
if (burst == null || burst.complete)
{
burst = new NmeaBurst();
}
ParseSentence(sentence, ref burst);
if(burst != null)
{
if (burst.bGGA && burst.bGSA && burst.bGSV && burst.bRMC)
burst.Complete();
#region Trigger NmeaBurstReceived Event
if (burst.complete && BurstReceived != null && !_cancelled)
{
_bursts++;
try
{
if (burst.IsValidNmea)
{
OnBurstReceived(burst);
}
else
{
burst.drop = true;
OnBurstReceived(burst);
burst = null;
}
}
catch (Exception ex)
{
TtUtils.WriteError(ex.Message, "GpsAccess:BurstReceived:Delegate", ex.StackTrace);
}
}
#endregion
}
if (_cancelled)
{
Cancel();
return;
}
sentence = _port.ReadLine().TrimEx();
}
}
}
#endregion
#region Catch Exceptions
catch (TimeoutException toEx)
{
Error = GpsErrorType.GpsTimeout;
TtUtils.WriteError(toEx.Message, "GpsAccess", toEx.StackTrace);
#region trigger ComTimeout event
if (ComTimeout != null)
ComTimeout();
#endregion
CloseGpsPort();
}
catch(System.IO.IOException ioEx)
{
Error = GpsErrorType.ComNotExist;
TtUtils.WriteError(ioEx.Message, "GpsAccess", ioEx.StackTrace);
#region trigger Error event
if (GpsError != null)
GpsError();
#endregion
CloseGpsPort();
}
catch (Exception ex)
{
Error = GpsErrorType.UnknownError;
TtUtils.WriteError(ex.Message, "GpsAccess", ex.StackTrace);
#region trigger Error event
if (GpsError != null)
GpsError();
#endregion
CloseGpsPort();
}
#endregion
}
