/// <summary>
/// Connect to the serial port.
/// This will set the serial port based off the serial options.
/// It will then try to open the serial port. If it cannot be opened,
/// it will get an exception and return false. The error will be logged.
/// </summary>
/// <returns>TRUE = Connection could be made. / FALSE = Conneciton could not be made.</returns>
public bool Connect()
{
// Make sure serial port is set
if (!string.IsNullOrEmpty(_serialOptions.Port))
{
_serialPort = new SerialPort(_serialOptions.Port);
_serialPort.BaudRate = _serialOptions.BaudRate; // Set baud rate
_serialPort.DataBits = _serialOptions.DataBits; // Set Data bits
_serialPort.Parity = _serialOptions.Parity; // Set Parity
_serialPort.StopBits = _serialOptions.StopBits; // Set stop bits
_serialPort.Handshake = Handshake.None; // No handshake (Flow Control None)
_serialPort.ReadBufferSize = 16 * 65536;
ReceiveBufferString = ""; // Clear the buffer
//Set the read/write timeouts
_serialPort.ReadTimeout = 50;
_serialPort.WriteTimeout = 500;
// Check if Open() has already been called on this serial port object
if (!_serialPort.IsOpen)
{
// Open the serial port and remove old data
try
{
_serialPort.Open();
// If the connection is opened, start the thread
if (_serialPort.IsOpen)
{
if (!_readThread.IsAlive)
{
_readThread = new Thread(new ParameterizedThreadStart(ReadThreadMethod));
_readThread.Priority = ThreadPriority.Normal;
_readThread.Name = "Serial Connection";
_readThread.Start();
}
}
// Discard any old data in buffer
_serialPort.DiscardInBuffer();
Debug.WriteLine("SerialConnection.Connect(): " + _serialOptions.ToString());
}
catch (System.UnauthorizedAccessException ex)
{
// Port is already in use
log.Warn("COMM Port already in use: " + _serialOptions.Port, ex);
Debug.WriteLine("COMM Port already in use: " + _serialOptions.Port);
Disconnect();
return(false);
}
catch (System.ArgumentOutOfRangeException ex_range)
{
// Not sure what is causing this exception yet
log.Error("Error COMM Port: " + _serialOptions.Port, ex_range);
Debug.WriteLine("Error COMM Port: " + _serialOptions.Port);
Disconnect();
return(false);
}
catch (System.IO.IOException io_ex)
{
// The Serial port does not exist
log.Debug(string.Format("Error COM Port: {0} does not exist.", _serialOptions.Port), io_ex);
Debug.WriteLine(string.Format("Error COM Port: {0} does not exist.", _serialOptions.Port));
Disconnect();
return(false);
}
catch (Exception ex)
{
log.Error("Error Opening in COMM Port: " + _serialOptions.Port, ex);
Debug.WriteLine("Error Opening in COMM Port: " + _serialOptions.Port);
Disconnect();
return(false);
}
}
// If the serial port is already open, return true
return(true);
}
// Serial port could not be opened
// Either a bad string or a string not given for the port
Disconnect();
return(false);
}
/// <summary>
/// Display the object to a string.
/// </summary>
/// <returns>String of the object.</returns>
public override string ToString()
{
string result = SerialOptions.ToString();
return(result);
}
