nefarius/Nefarius.Peripherals.SerialPort
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This commit is contained in:
Benjamin Höglinger-Stelzer 2018-11-22 21:35:11 +01:00
parent 55c3aefa2d
commit 33e68a0745
1 changed files with 527 additions and 479 deletions
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PInvokeSerialPort/SerialPort.cs
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@ -12,19 +12,136 @@ namespace PInvokeSerialPort
/// </summary>
public class SerialPort : IDisposable
{
private IntPtr _hPort;
private IntPtr _ptrUwo = IntPtr.Zero;
private Thread _rxThread;
private bool _online;
private readonly ManualResetEvent _writeEvent = new ManualResetEvent(false);
private bool _auto;
private bool _checkSends = true;
private Handshake _handShake;
private IntPtr _hPort;
private bool _online;
private IntPtr _ptrUwo = IntPtr.Zero;
private Exception _rxException;
private bool _rxExceptionReported;
private int _writeCount;
private readonly ManualResetEvent _writeEvent = new ManualResetEvent(false);
private int _stateRts = 2;
private int _stateDtr = 2;
private Thread _rxThread;
private int _stateBrk = 2;
private int _stateDtr = 2;
private int _stateRts = 2;
private int _writeCount;
/// <summary>
/// If true, the port will automatically re-open on next send if it was previously closed due
/// to an error (default: false)
/// </summary>
public bool AutoReopen;
/// <summary>
/// Baud Rate (default: 2400) unsupported rates will throw "Bad settings"
/// </summary>
public int BaudRate = 115200;
/// <summary>
/// If true, subsequent Send commands wait for completion of earlier ones enabling the results
/// to be checked. If false, errors, including timeouts, may not be detected, but performance
/// may be better.
/// </summary>
public bool CheckAllSends = true;
/// <summary>
/// Number of databits 1..8 (default: 8) unsupported values will throw "Bad settings"
/// </summary>
public int DataBits = 8;
/// <summary>
/// The parity checking scheme (default: none)
/// </summary>
public Parity Parity = Parity.None;
/// <summary>
/// If true, Xon and Xoff characters are sent to control the data flow from the remote station (default: false)
/// </summary>
public bool RxFlowX;
/// <summary>
/// If true, received characters are ignored unless DSR is asserted by the remote station (default: false)
/// </summary>
public bool RxGateDsr;
/// <summary>
/// The number of free bytes in the reception queue at which flow is disabled (default: 2048)
/// </summary>
public int RxHighWater = 2048;
/// <summary>
/// The number of bytes in the reception queue at which flow is re-enabled (default: 512)
/// </summary>
public int RxLowWater = 512;
/// <summary>
/// Requested size for receive queue (default: 0 = use operating system default)
/// </summary>
public int RxQueue;
/// <summary>
/// Constant. Max time for Send in ms = (Multiplier * Characters) + Constant (default: 0)
/// </summary>
public int SendTimeoutConstant;
/// <summary>
/// Multiplier. Max time for Send in ms = (Multiplier * Characters) + Constant
/// (default: 0 = No timeout)
/// </summary>
public int SendTimeoutMultiplier;
/// <summary>
/// Number of stop bits (default: one)
/// </summary>
public StopBits StopBits = StopBits.One;
/// <summary>
/// If true, transmission is halted unless CTS is asserted by the remote station (default: false)
/// </summary>
public bool TxFlowCts;
/// <summary>
/// If true, transmission is halted unless DSR is asserted by the remote station (default: false)
/// </summary>
public bool TxFlowDsr;
/// <summary>
/// If true, transmission is halted when Xoff is received and restarted when Xon is received (default: false)
/// </summary>
public bool TxFlowX;
/// <summary>
/// Requested size for transmit queue (default: 0 = use operating system default)
/// </summary>
public int TxQueue;
/// <summary>
/// If false, transmission is suspended when this station has sent Xoff to the remote station (default: true)
/// Set false if the remote station treats any character as an Xon.
/// </summary>
public bool TxWhenRxXoff = true;
/// <summary>
/// Specidies the use to which the DTR output is put (default: none)
/// </summary>
public HsOutput UseDtr = HsOutput.None;
/// <summary>
/// Specifies the use to which the RTS output is put (default: none)
/// </summary>
public HsOutput UseRts = HsOutput.None;
/// <summary>
/// The character used to signal Xoff for X flow control (default: DC3)
/// </summary>
public ASCII XoffChar = ASCII.DC3;
/// <summary>
/// The character used to signal Xon for X flow control (default: DC1)
/// </summary>
public ASCII XonChar = ASCII.DC1;
/// <summary>
/// Class contructor
@ -43,6 +160,170 @@ namespace PInvokeSerialPort
BaudRate = baudRate;
}
/// <summary>
/// True if online.
/// </summary>
public bool Online => _online && CheckOnline();
/// <summary>
/// True if the RTS pin is controllable via the RTS property
/// </summary>
protected bool RtSavailable => _stateRts < 2;
/// <summary>
/// Set the state of the RTS modem control output
/// </summary>
protected bool Rts
{
set
{
if (_stateRts > 1) return;
CheckOnline();
if (value)
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.SETRTS))
_stateRts = 1;
else
ThrowException("Unexpected Failure");
}
else
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.CLRRTS))
_stateRts = 1;
else
ThrowException("Unexpected Failure");
}
}
get => _stateRts == 1;
}
/// <summary>
/// True if the DTR pin is controllable via the DTR property
/// </summary>
protected bool DtrAvailable => _stateDtr < 2;
/// <summary>
/// The state of the DTR modem control output
/// </summary>
protected bool Dtr
{
set
{
if (_stateDtr > 1) return;
CheckOnline();
if (value)
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.SETDTR))
_stateDtr = 1;
else
ThrowException("Unexpected Failure");
}
else
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.CLRDTR))
_stateDtr = 0;
else
ThrowException("Unexpected Failure");
}
}
get => _stateDtr == 1;
}
/// <summary>
/// Assert or remove a break condition from the transmission line
/// </summary>
protected bool Break
{
set
{
if (_stateBrk > 1) return;
CheckOnline();
if (value)
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.SETBREAK))
_stateBrk = 0;
else
ThrowException("Unexpected Failure");
}
else
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.CLRBREAK))
_stateBrk = 0;
else
ThrowException("Unexpected Failure");
}
}
get => _stateBrk == 1;
}
/// <summary>
/// Port Name
/// </summary>
public string PortName { get; set; }
public Handshake Handshake
{
get => _handShake;
set
{
_handShake = value;
switch (_handShake)
{
case Handshake.None:
TxFlowCts = false;
TxFlowDsr = false;
TxFlowX = false;
RxFlowX = false;
UseRts = HsOutput.Online;
UseDtr = HsOutput.Online;
TxWhenRxXoff = true;
RxGateDsr = false;
break;
case Handshake.XonXoff:
TxFlowCts = false;
TxFlowDsr = false;
TxFlowX = true;
RxFlowX = true;
UseRts = HsOutput.Online;
UseDtr = HsOutput.Online;
TxWhenRxXoff = true;
RxGateDsr = false;
XonChar = ASCII.DC1;
XoffChar = ASCII.DC3;
break;
case Handshake.CtsRts:
TxFlowCts = true;
TxFlowDsr = false;
TxFlowX = false;
RxFlowX = false;
UseRts = HsOutput.Handshake;
UseDtr = HsOutput.Online;
TxWhenRxXoff = true;
RxGateDsr = false;
break;
case Handshake.DsrDtr:
TxFlowCts = false;
TxFlowDsr = true;
TxFlowX = false;
RxFlowX = false;
UseRts = HsOutput.Online;
UseDtr = HsOutput.Handshake;
TxWhenRxXoff = true;
RxGateDsr = false;
break;
}
}
}
/// <summary>
/// For IDisposable
/// </summary>
public void Dispose()
{
Close();
}
/// <summary>
/// Opens the com port and configures it with the required settings
/// </summary>
@ -57,12 +338,9 @@ namespace PInvokeSerialPort
_hPort = Win32Com.CreateFile(PortName, Win32Com.GENERIC_READ | Win32Com.GENERIC_WRITE, 0, IntPtr.Zero,
Win32Com.OPEN_EXISTING, Win32Com.FILE_FLAG_OVERLAPPED, IntPtr.Zero);
if (_hPort == (IntPtr)Win32Com.INVALID_HANDLE_VALUE)
if (_hPort == (IntPtr) Win32Com.INVALID_HANDLE_VALUE)
{
if (Marshal.GetLastWin32Error() == Win32Com.ERROR_ACCESS_DENIED)
{
return false;
}
if (Marshal.GetLastWin32Error() == Win32Com.ERROR_ACCESS_DENIED) return false;
throw new CommPortException("Port Open Failure");
}
@ -73,18 +351,19 @@ namespace PInvokeSerialPort
commTimeouts.ReadTotalTimeoutMultiplier = 0;
commTimeouts.WriteTotalTimeoutConstant = SendTimeoutConstant;
commTimeouts.WriteTotalTimeoutMultiplier = SendTimeoutMultiplier;
portDcb.Init(((Parity == Parity.Odd) || (Parity == Parity.Even)), TxFlowCts, TxFlowDsr,
(int)UseDtr, RxGateDsr, !TxWhenRxXoff, TxFlowX, RxFlowX, (int)UseRts);
portDcb.Init(Parity == Parity.Odd || Parity == Parity.Even, TxFlowCts, TxFlowDsr,
(int) UseDtr, RxGateDsr, !TxWhenRxXoff, TxFlowX, RxFlowX, (int) UseRts);
portDcb.BaudRate = BaudRate;
portDcb.ByteSize = (byte)DataBits;
portDcb.Parity = (byte)Parity;
portDcb.StopBits = (byte)StopBits;
portDcb.XoffChar = (byte)XoffChar;
portDcb.XonChar = (byte)XonChar;
portDcb.XoffLim = (short)RxHighWater;
portDcb.XonLim = (short)RxLowWater;
if ((RxQueue != 0) || (TxQueue != 0))
if (!Win32Com.SetupComm(_hPort, (uint)RxQueue, (uint)TxQueue)) ThrowException("Bad queue settings");
portDcb.ByteSize = (byte) DataBits;
portDcb.Parity = (byte) Parity;
portDcb.StopBits = (byte) StopBits;
portDcb.XoffChar = (byte) XoffChar;
portDcb.XonChar = (byte) XonChar;
portDcb.XoffLim = (short) RxHighWater;
portDcb.XonLim = (short) RxLowWater;
if (RxQueue != 0 || TxQueue != 0)
if (!Win32Com.SetupComm(_hPort, (uint) RxQueue, (uint) TxQueue))
ThrowException("Bad queue settings");
if (!Win32Com.SetCommState(_hPort, ref portDcb)) ThrowException("Bad com settings");
if (!Win32Com.SetCommTimeouts(_hPort, ref commTimeouts)) ThrowException("Bad timeout settings");
@ -120,6 +399,7 @@ namespace PInvokeSerialPort
_auto = AutoReopen;
return true;
}
Close();
return false;
}
@ -146,6 +426,7 @@ namespace PInvokeSerialPort
_rxThread.Abort();
_rxThread = null;
}
Win32Com.CloseHandle(_hPort);
if (_ptrUwo != IntPtr.Zero) Marshal.FreeHGlobal(_ptrUwo);
_stateRts = 2;
@ -154,20 +435,13 @@ namespace PInvokeSerialPort
_online = false;
}
/// <summary>
/// For IDisposable
/// </summary>
public void Dispose() { Close(); }
/// <summary>
/// Destructor (just in case)
/// </summary>
~SerialPort() { Close(); }
/// <summary>
/// True if online.
/// </summary>
public bool Online { get { return _online && CheckOnline(); } }
~SerialPort()
{
Close();
}
/// <summary>
/// Block until all bytes in the queue have been transmitted.
@ -185,19 +459,14 @@ namespace PInvokeSerialPort
/// <param name="reason">Description of fault</param>
protected void ThrowException(string reason)
{
if (Thread.CurrentThread == _rxThread)
{
throw new CommPortException(reason);
}
if (Thread.CurrentThread == _rxThread) throw new CommPortException(reason);
if (_online)
{
BeforeClose(true);
InternalClose();
}
if (_rxException == null)
{
throw new CommPortException(reason);
}
if (_rxException == null) throw new CommPortException(reason);
throw new CommPortException(_rxException);
}
@ -211,9 +480,9 @@ namespace PInvokeSerialPort
CheckOnline();
CheckResult();
_writeCount = toSend.GetLength(0);
if (Win32Com.WriteFile(_hPort, toSend, (uint)_writeCount, out sent, _ptrUwo))
if (Win32Com.WriteFile(_hPort, toSend, (uint) _writeCount, out sent, _ptrUwo))
{
_writeCount -= (int)sent;
_writeCount -= (int) sent;
}
else
{
@ -265,7 +534,7 @@ namespace PInvokeSerialPort
uint sent;
if (Win32Com.GetOverlappedResult(_hPort, _ptrUwo, out sent, _checkSends))
{
_writeCount -= (int)sent;
_writeCount -= (int) sent;
if (_writeCount != 0) ThrowException("Send Timeout");
}
else
@ -324,120 +593,26 @@ namespace PInvokeSerialPort
return new QueueStatus(cs.Flags, cs.cbInQue, cs.cbOutQue, cp.dwCurrentRxQueue, cp.dwCurrentTxQueue);
}
/// <summary>
/// True if the RTS pin is controllable via the RTS property
/// </summary>
protected bool RtSavailable { get { return (_stateRts < 2); } }
/// <summary>
/// Set the state of the RTS modem control output
/// </summary>
protected bool Rts
{
set
{
if (_stateRts > 1) return;
CheckOnline();
if (value)
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.SETRTS))
_stateRts = 1;
else
ThrowException("Unexpected Failure");
}
else
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.CLRRTS))
_stateRts = 1;
else
ThrowException("Unexpected Failure");
}
}
get
{
return (_stateRts == 1);
}
}
/// <summary>
/// True if the DTR pin is controllable via the DTR property
/// </summary>
protected bool DtrAvailable { get { return (_stateDtr < 2); } }
/// <summary>
/// The state of the DTR modem control output
/// </summary>
protected bool Dtr
{
set
{
if (_stateDtr > 1) return;
CheckOnline();
if (value)
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.SETDTR))
_stateDtr = 1;
else
ThrowException("Unexpected Failure");
}
else
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.CLRDTR))
_stateDtr = 0;
else
ThrowException("Unexpected Failure");
}
}
get
{
return (_stateDtr == 1);
}
}
/// <summary>
/// Assert or remove a break condition from the transmission line
/// </summary>
protected bool Break
{
set
{
if (_stateBrk > 1) return;
CheckOnline();
if (value)
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.SETBREAK))
_stateBrk = 0;
else
ThrowException("Unexpected Failure");
}
else
{
if (Win32Com.EscapeCommFunction(_hPort, Win32Com.CLRBREAK))
_stateBrk = 0;
else
ThrowException("Unexpected Failure");
}
}
get
{
return (_stateBrk == 1);
}
}
/// <summary>
/// Override this to provide processing after the port is openned (i.e. to configure remote
/// device or just check presence).
/// </summary>
/// <returns>false to close the port again</returns>
protected virtual bool AfterOpen() { return true; }
protected virtual bool AfterOpen()
{
return true;
}
/// <summary>
/// Override this to provide processing prior to port closure.
/// </summary>
/// <param name="error">True if closing due to an error</param>
protected virtual void BeforeClose(bool error) { }
protected virtual void BeforeClose(bool error)
{
}
public event Action<byte> DataReceived;
/// <summary>
/// Override this to process received bytes.
/// </summary>
@ -452,39 +627,50 @@ namespace PInvokeSerialPort
/// Override this to take action when transmission is complete (i.e. all bytes have actually
/// been sent, not just queued).
/// </summary>
protected virtual void OnTxDone() { }
protected virtual void OnTxDone()
{
}
/// <summary>
/// Override this to take action when a break condition is detected on the input line.
/// </summary>
protected virtual void OnBreak() { }
protected virtual void OnBreak()
{
}
/// <summary>
/// Override this to take action when a ring condition is signalled by an attached modem.
/// </summary>
protected virtual void OnRing() { }
protected virtual void OnRing()
{
}
/// <summary>
/// Override this to take action when one or more modem status inputs change state
/// </summary>
/// <param name="mask">The status inputs that have changed state</param>
/// <param name="state">The state of the status inputs</param>
protected virtual void OnStatusChange(ModemStatus mask, ModemStatus state) { }
protected virtual void OnStatusChange(ModemStatus mask, ModemStatus state)
{
}
/// <summary>
/// Override this to take action when the reception thread closes due to an exception being thrown.
/// </summary>
/// <param name="e">The exception which was thrown</param>
protected virtual void OnRxException(Exception e) { }
protected virtual void OnRxException(Exception e)
{
}
private void ReceiveThread()
{
var buf = new Byte[1];
var buf = new byte[1];
var sg = new AutoResetEvent(false);
var ov = new OVERLAPPED();
var unmanagedOv = Marshal.AllocHGlobal(Marshal.SizeOf(ov));
ov.Offset = 0; ov.OffsetHigh = 0;
ov.Offset = 0;
ov.OffsetHigh = 0;
ov.hEvent = sg.Handle;
Marshal.StructureToPtr(ov, unmanagedOv, true);
@ -495,27 +681,23 @@ namespace PInvokeSerialPort
{
while (true)
{
if (!Win32Com.SetCommMask(_hPort, Win32Com.EV_RXCHAR | Win32Com.EV_TXEMPTY | Win32Com.EV_CTS | Win32Com.EV_DSR
if (!Win32Com.SetCommMask(_hPort,
Win32Com.EV_RXCHAR | Win32Com.EV_TXEMPTY | Win32Com.EV_CTS | Win32Com.EV_DSR
| Win32Com.EV_BREAK | Win32Com.EV_RLSD | Win32Com.EV_RING | Win32Com.EV_ERR))
{
throw new CommPortException("IO Error [001]");
}
Marshal.WriteInt32(uMask, 0);
if (!Win32Com.WaitCommEvent(_hPort, uMask, unmanagedOv))
{
if (Marshal.GetLastWin32Error() == Win32Com.ERROR_IO_PENDING)
{
sg.WaitOne();
}
else
{
throw new CommPortException("IO Error [002]");
}
}
eventMask = (uint)Marshal.ReadInt32(uMask);
eventMask = (uint) Marshal.ReadInt32(uMask);
if ((eventMask & Win32Com.EV_ERR) != 0)
{
UInt32 errs;
uint errs;
if (Win32Com.ClearCommError(_hPort, out errs, IntPtr.Zero))
{
var s = new StringBuilder("UART Error: ", 40);
@ -528,8 +710,10 @@ namespace PInvokeSerialPort
s.Length = s.Length - 1;
throw new CommPortException(s.ToString());
}
throw new CommPortException("IO Error [003]");
}
if ((eventMask & Win32Com.EV_RXCHAR) != 0)
{
uint gotbytes;
@ -547,14 +731,12 @@ namespace PInvokeSerialPort
throw new CommPortException("IO Error [004]");
}
}
if (gotbytes == 1) OnRxChar(buf[0]);
if (gotbytes == 1) OnRxChar(buf[0]);
} while (gotbytes > 0);
}
if ((eventMask & Win32Com.EV_TXEMPTY) != 0)
{
OnTxDone();
}
if ((eventMask & Win32Com.EV_TXEMPTY) != 0) OnTxDone();
if ((eventMask & Win32Com.EV_BREAK) != 0) OnBreak();
uint i = 0;
@ -584,11 +766,12 @@ namespace PInvokeSerialPort
private bool CheckOnline()
{
if ((_rxException != null) && (!_rxExceptionReported))
if (_rxException != null && !_rxExceptionReported)
{
_rxExceptionReported = true;
ThrowException("rx");
}
if (_online)
{
uint f;
@ -596,147 +779,12 @@ namespace PInvokeSerialPort
ThrowException("Offline");
return false;
}
if (_auto)
{
if (Open()) return true;
}
if (Open())
return true;
ThrowException("Offline");
return false;
}
/// <summary>
/// Port Name
/// </summary>
public string PortName { get; set; }
/// <summary>
/// Baud Rate (default: 2400) unsupported rates will throw "Bad settings"
/// </summary>
public int BaudRate = 115200;
/// <summary>
/// The parity checking scheme (default: none)
/// </summary>
public Parity Parity = Parity.None;
/// <summary>
/// Number of databits 1..8 (default: 8) unsupported values will throw "Bad settings"
/// </summary>
public int DataBits = 8;
/// <summary>
/// Number of stop bits (default: one)
/// </summary>
public StopBits StopBits = StopBits.One;
/// <summary>
/// If true, transmission is halted unless CTS is asserted by the remote station (default: false)
/// </summary>
public bool TxFlowCts;
/// <summary>
/// If true, transmission is halted unless DSR is asserted by the remote station (default: false)
/// </summary>
public bool TxFlowDsr;
/// <summary>
/// If true, transmission is halted when Xoff is received and restarted when Xon is received (default: false)
/// </summary>
public bool TxFlowX;
/// <summary>
/// If false, transmission is suspended when this station has sent Xoff to the remote station (default: true)
/// Set false if the remote station treats any character as an Xon.
/// </summary>
public bool TxWhenRxXoff = true;
/// <summary>
/// If true, received characters are ignored unless DSR is asserted by the remote station (default: false)
/// </summary>
public bool RxGateDsr;
/// <summary>
/// If true, Xon and Xoff characters are sent to control the data flow from the remote station (default: false)
/// </summary>
public bool RxFlowX;
/// <summary>
/// Specifies the use to which the RTS output is put (default: none)
/// </summary>
public HsOutput UseRts = HsOutput.None;
/// <summary>
/// Specidies the use to which the DTR output is put (default: none)
/// </summary>
public HsOutput UseDtr = HsOutput.None;
/// <summary>
/// The character used to signal Xon for X flow control (default: DC1)
/// </summary>
public ASCII XonChar = ASCII.DC1;
/// <summary>
/// The character used to signal Xoff for X flow control (default: DC3)
/// </summary>
public ASCII XoffChar = ASCII.DC3;
/// <summary>
/// The number of free bytes in the reception queue at which flow is disabled (default: 2048)
/// </summary>
public int RxHighWater = 2048;
/// <summary>
/// The number of bytes in the reception queue at which flow is re-enabled (default: 512)
/// </summary>
public int RxLowWater = 512;
/// <summary>
/// Multiplier. Max time for Send in ms = (Multiplier * Characters) + Constant
/// (default: 0 = No timeout)
/// </summary>
public int SendTimeoutMultiplier;
/// <summary>
/// Constant. Max time for Send in ms = (Multiplier * Characters) + Constant (default: 0)
/// </summary>
public int SendTimeoutConstant;
/// <summary>
/// Requested size for receive queue (default: 0 = use operating system default)
/// </summary>
public int RxQueue;
/// <summary>
/// Requested size for transmit queue (default: 0 = use operating system default)
/// </summary>
public int TxQueue;
/// <summary>
/// If true, the port will automatically re-open on next send if it was previously closed due
/// to an error (default: false)
/// </summary>
public bool AutoReopen;
/// <summary>
/// If true, subsequent Send commands wait for completion of earlier ones enabling the results
/// to be checked. If false, errors, including timeouts, may not be detected, but performance
/// may be better.
/// </summary>
public bool CheckAllSends = true;
private Handshake _handShake;
public Handshake Handshake
{
get { return _handShake; }
set
{
_handShake = value;
switch (_handShake)
{
case Handshake.None:
TxFlowCts = false; TxFlowDsr = false; TxFlowX = false;
RxFlowX = false; UseRts = HsOutput.Online; UseDtr = HsOutput.Online;
TxWhenRxXoff = true; RxGateDsr = false;
break;
case Handshake.XonXoff:
TxFlowCts = false; TxFlowDsr = false; TxFlowX = true;
RxFlowX = true; UseRts = HsOutput.Online; UseDtr = HsOutput.Online;
TxWhenRxXoff = true; RxGateDsr = false;
XonChar = ASCII.DC1; XoffChar = ASCII.DC3;
break;
case Handshake.CtsRts:
TxFlowCts = true; TxFlowDsr = false; TxFlowX = false;
RxFlowX = false; UseRts = HsOutput.Handshake; UseDtr = HsOutput.Online;
TxWhenRxXoff = true; RxGateDsr = false;
break;
case Handshake.DsrDtr:
TxFlowCts = false; TxFlowDsr = true; TxFlowX = false;
RxFlowX = false; UseRts = HsOutput.Online; UseDtr = HsOutput.Handshake;
TxWhenRxXoff = true; RxGateDsr = false;
break;
}
}
}
}
}