/// design
/// this object in instantiated on startup and the controller thread starts
///
/// if the initial config is either un-configured or USE_NONE for GPS mode,
/// the thread will do nothing but loop on the use mode flags. A call to LoadGPSConfiguration() will
/// cause the flags to change and the operation of the loop to change.
public GPSController(PutNewGPSData putNewGPSData, APPLICATION_DATA appData)
{
m_putNewGPSData = putNewGPSData;
m_AppData = appData;
m_AppData.AddOnClosing(Close, APPLICATION_DATA.CLOSE_ORDER.FIRST);
m_Log = (ErrorLog)m_AppData.Logger;
m_FixedSiteCoordiates = new GPSDev.GPSInfo();
m_CurrentLocationInfo = new GPSDev.GPSInfo();
// load any static/stored positions in case a GPS device is not found
m_GPSUseModes = GPS_USE_MODES.USE_FIXED;
LoadGPSConfiguration();
// start a new thread
m_PollForDataThread = new Thread(Poller);
m_PollForDataThread.Start();
}
public string GetLocation(out GPSDev.GPSInfo info)
{
string l = null;
if (m_GPSUseModes == GPS_USE_MODES.USE_RECEIVER)
{
lock (m_CurrentLocationInfo)
{
info = m_CurrentLocationInfo.Clone();
}
}
else
{
lock (m_FixedSiteCoordiates)
{
info = m_FixedSiteCoordiates.Clone();
}
}
return(l);
}
void Poller()
{
GPSDev.GPSInfo gpsInfo = null;
while (!m_Stop)
{
Thread.Sleep(m_PollLoopSleepTime);
// do we have a comm port?
if (m_FixedCommPort == null)
{
m_FixedCommPort = FindDevicePort.GetGPSCommPort();
// may still be null if there is no device
}
if (m_ResetGPSDriver)
{
// lost the device connection, start over
if (m_GPSDevice != null)
{
m_GPSDevice.Close();
}
m_FixedCommPort = null; // start over, perhaps the user moved the receiver to another port
m_GPSDevice = null;
m_ResetGPSDriver = false;
m_Log.Log("lost GPS Device connection", ErrorLog.LOG_TYPE.FATAL);
m_GPSUseModes = GPS_USE_MODES.USE_FIXED;
LoadGPSConfiguration();// re-load the static configuration if one is there
}
if (m_FixedCommPort != null)
{
// we have found a comm, port, try it....
// do we have a device opened ?
if (m_GPSDevice == null && !m_Stop)
{
m_GPSDevice = new GPSDev(m_FixedCommPort, HandleLostGPSDeviceConnection, m_AppData);
}
if (m_GPSDevice == null && m_Stop)
{
break;
}
if (!m_GPSDevice.OpenSucess)
{
m_GPSDevice.Close();
m_GPSDevice = null;
continue;// try again next time around
}
else
{
if (m_ReceiverDetected == false)
{
m_Log.Log("connected to GPS Device", ErrorLog.LOG_TYPE.FATAL);
}
m_ReceiverDetected = true;
m_GPSUseModes = GPS_USE_MODES.USE_RECEIVER;
// everything is working fine, get the latest available sat data
m_GPSDevice.GetLocation(out gpsInfo);
lock (m_CurrentLocationInfo)
{
m_CurrentLocationInfo = gpsInfo.Clone();
}
BuildURL(gpsInfo.Latitude, gpsInfo.Longitude, m_googleString);
}
}
if (m_GPSUseModes == GPS_USE_MODES.USE_RECEIVER)
{
m_putNewGPSData(gpsInfo.CleanPositionString, gpsInfo.DetectedReceiver, gpsInfo.HaveSatData);
}
else if (m_GPSUseModes == GPS_USE_MODES.USE_FIXED)
{
m_putNewGPSData(m_FixedSiteCoordiates.CleanPositionString, m_FixedSiteCoordiates.DetectedReceiver, m_FixedSiteCoordiates.HaveSatData);
}
else if (m_GPSUseModes == GPS_USE_MODES.USE_NONE)
{
m_putNewGPSData("no position avaialbe", false, false);
}
}// end while (! stop)
if (m_GPSDevice != null)
{
m_GPSDevice.Close();
m_GPSDevice = null;
}
}