void TryInitModem()
{
// Try pistoning the modem with higher frequency. This does no harm (such as redundant logging)
PrepareU9Modem(); // Will do nothing if modem is okay
if (!_initFailureTimeout.IsTimedOut())
{
return; // Don't try too frequently
}
if (modemPort != null)
{
return;
}
const string modemPortName = "Basecom HS-USB NMEA 9000";
const int speed = 115200;
string portName = Hardware.Misc.SerialPortFromFriendlyName(modemPortName);
if (portName == null)
{
NihLog.Write(NihLog.Level.Error, "Modem not found (yet). ");
_initFailureTimeout.Reset();
return;
}
NihLog.Write(NihLog.Level.Info, string.Format("Found modem port \"{0}\" at {1}", modemPortName, portName));
modemPort = new System.IO.Ports.SerialPort(portName, speed);
modemPort.ReadTimeout = 3000;
modemPort.NewLine = "\r\n";
modemPort.Open();
modemPort.DiscardInBuffer();
modemPort.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(delegate { _mainThreadOwnder.Invoke(dataReceivedDelegate); }); // called in different thread!
_lastModemKeepAlive = new Timeouter(60, true);
WriteToModem("AT+CFUN=1\r");
CurrentModemState = ModemState.PowerUp;
}
public void HeartBeat()
{
if (CurrentModemState == ModemState.NotInitialized)
{
TryInitModem();
return;
}
if (IsTransitionalState(CurrentModemState) && ModemStateTimeouter.IsTimedOut())
{
NihLog.Write(NihLog.Level.Error, "Modem error. Timed out during " + CurrentModemState);
CurrentModemState = ModemState.Error;
return;
}
if (CurrentModemState == ModemState.Idle && _lastModemKeepAlive.IsTimedOut())
{
// Send keepalive
WriteToModem("AT\r");
CurrentModemState = ModemState.KeepAliveAwaitingResponse;
return;
}
if (CurrentModemState == ModemState.Error)
{
NihLog.Write(NihLog.Level.Debug, "Reenumerating modem...");
UninitModem();
return;
}
if (_outSmses.Count != 0 && CurrentModemState == ModemState.Idle)
{
SendSmsNow();
return;
}
}
