public Int32 ReadCom(byte[] toSend, int uiCount)
{
bool bRes = false, bComEvent;
UInt32 retlen;
bComEvent = Win32Com.SetCommMask(_hPort, EV_RXCHAR);
if (bComEvent)
{
bRes = ReadFile(_hPort, // handle of file to read
toSend, // pointer to buffer that receives data
(uint)uiCount, // number of bytes to read
out retlen, // pointer to number of bytes read
IntPtr.Zero // pointer to structure for data
);
if (!(bRes))
{
return(0);
}
if (retlen > 0) //If we have data
{
return((Int32)retlen); //return the length
}
else
{
return(0); //else no data has been read
}
}
else
{
return(0);
}
}
internal static bool send_init_to_master()
{
uint retval = 0;
COMSTAT cs;
uint er;
writePacket(JVS_ADDR_BROADCAST, new[] { JVS_OP_RESET, JVS_OP_RESET_ARG });
if (!Win32Com.ClearCommError(HPort, out er, out cs))
{
return(false);
}
if (!Win32Com.EscapeCommFunction(HPort, Win32Com.SETRTS))
{
return(false);
}
Thread.Sleep(1000);
JVS_DEVICE_COUNT = 0;
while (JVS_DEVICE_COUNT != 1)
{
JVS_DEVICE_COUNT++;
//info(true, "Sending reset to JVS %08d", JVS_DEVICE_COUNT);
send_init_to_JVS_board(JVS_DEVICE_COUNT);
}
return(true);
}
private bool CheckOnline()
{
if ((_rxException != null) && (!_rxExceptionReported))
{
_rxExceptionReported = true;
ThrowException("rx");
}
if (_online)
{
uint f;
if (Win32Com.GetHandleInformation(_hPort, out f))
{
return(true);
}
ThrowException("Offline");
return(false);
}
if (_auto)
{
if (Open())
{
return(true);
}
}
ThrowException("Offline");
return(false);
}
/// <summary>
/// Sends a protocol byte immediately ahead of any queued bytes.
/// </summary>
/// <param name="tosend">Byte to send</param>
/// <returns>False if an immediate byte is already scheduled and not yet sent</returns>
public void SendImmediate(byte tosend)
{
CheckOnline();
if (!Win32Com.TransmitCommChar(_hPort, tosend))
{
ThrowException("Transmission failure");
}
}
/// <summary>
/// Gets the status of the modem control input signals.
/// </summary>
/// <returns>Modem status object</returns>
protected ModemStatus GetModemStatus()
{
uint f;
CheckOnline();
if (!Win32Com.GetCommModemStatus(_hPort, out f))
{
ThrowException("Unexpected failure");
}
return(new ModemStatus(f));
}
internal static List <byte> GetJvsReply(byte node, byte[] package)
{
List <byte> result = new List <byte>();
writePacket(node, package);
//if (!ClearCommError(hPort, 0, 0))
//return false;
if (!Win32Com.EscapeCommFunction(HPort, Win32Com.SETRTS))
{
return(result);
}
uint count = 0;
uint Err;
COMSTAT CST;
while (true)
{
Win32Com.ClearCommError(HPort, out Err, out CST);
if ((CST.cbInQue > 0) || (count > 1000000))
{
break;
}
count++;
}
result.AddRange(readPacket());
if (result[0] != JVS_STATUS_OK)
{
Console.WriteLine("JVS Status not ok!");
return(null);
}
if (result[1] != JVS_REPORT_OK)
{
Console.WriteLine("JVS Report not ok!");
return(null);
}
//Console.WriteLine("Reply ok!");
//info(true, "first eight bytes from reply buffer: %02x %02x %02x %02x %02x %02x %02x %02x", readData[0], readData[1], readData[2], readData[3], readData[4], readData[5], readData[6], readData[7]);
// We remove status and report.
result.RemoveAt(0);
result.RemoveAt(0);
return(result);
}
private static bool ReadTheComData()
{
COMSTAT cs;
uint er;
if (!Win32Com.ClearCommError(HPort, out er, out cs))
{
return(false);
}
if (!Win32Com.EscapeCommFunction(HPort, Win32Com.CLRRTS))
{
return(false);
}
Thread.Sleep(1000);
uint count = 0;
uint Err;
COMSTAT CST;
while (true)
{
Win32Com.ClearCommError(HPort, out Err, out CST);
if ((CST.cbInQue > 0) || (count > 1000000))
{
break;
}
count++;
}
if (CST.cbInQue == 0)
{
return(false);
}
var result = readPacket();
if (result[0] != JVS_STATUS_OK)
{
return(false);
}
if (result[1] != JVS_REPORT_OK)
{
return(false);
}
return(true);
}
/// <summary>
/// Get the status of the queues
/// </summary>
/// <returns>Queue status object</returns>
protected QueueStatus GetQueueStatus()
{
COMSTAT cs;
COMMPROP cp;
uint er;
CheckOnline();
if (!Win32Com.ClearCommError(_hPort, out er, out cs))
{
ThrowException("Unexpected failure");
}
if (!Win32Com.GetCommProperties(_hPort, out cp))
{
ThrowException("Unexpected failure");
}
return(new QueueStatus(cs.Flags, cs.cbInQue, cs.cbOutQue, cp.dwCurrentRxQueue, cp.dwCurrentTxQueue));
}
/// <summary>
/// 打开端口
/// </summary>
public void Open()
{
_iHandle = Win32Com.CreateFile(Name, 0x40000000, 0, 0, 3, 0, 0);
if (_iHandle != -1)
{
this.IsOpen = true;
}
else
{
this.IsOpen = false;
}
this.IsOpen = true;
_isWork = true;
//开一个线程检测状态口状态
new System.Threading.Thread(new System.Threading.ThreadStart(ReadState)).Start();
}
private void InternalClose()
{
Win32Com.CancelIo(_hPort);
if (_rxThread != null)
{
_rxThread.Abort();
_rxThread = null;
}
Win32Com.CloseHandle(_hPort);
if (_ptrUwo != IntPtr.Zero)
{
Marshal.FreeHGlobal(_ptrUwo);
}
_stateRts = 2;
_stateDtr = 2;
_stateBrk = 2;
_online = false;
}
/// <summary>
/// Queues bytes for transmission.
/// </summary>
/// <param name="toSend">Array of bytes to be sent</param>
public void Write(byte[] toSend)
{
uint sent;
CheckOnline();
CheckResult();
_writeCount = toSend.GetLength(0);
if (Win32Com.WriteFile(_hPort, toSend, (uint)_writeCount, out sent, _ptrUwo))
{
_writeCount -= (int)sent;
}
else
{
if (Marshal.GetLastWin32Error() != Win32Com.ERROR_IO_PENDING)
{
ThrowException("Unexpected failure");
}
}
}
public bool WriteCom(byte[] toSend, uint uiCount)
{
uint sent;
Win32Com.WriteFile(_hPort, // Port handle
toSend, // Pointer to the data to write
uiCount, // Number of bytes to write
out sent, // Pointer to the number of bytes written
IntPtr.Zero); // Must be NULL
if (sent > 0)
{
return(true); //Transmission was success
}
else
{
return(false);
}
}
/// <summary>
/// 向端口写入指定的数据
/// </summary>
/// <param name="Data">指定的数据</param>
/// <returns></returns>
public bool WriteData(byte[] Data)
{
//for (int i = 0; i < Data.Length; i++)
// Output(BasePort, Data[i]); 这里原来也想用inpout32实现，但是从字节到int转换比较麻烦，试了几次没达到效果
//return true;
if (_iHandle != -1)
{
Win32Com.OVERLAPPED x = new Win32Com.OVERLAPPED();
int i = 0;
Win32Com.WriteFile(_iHandle, Data, Data.Length, ref i, ref x);
return(true);
}
else
{
//不能连接到打印机;
return(false);
}
}
private void CheckResult()
{
if (_writeCount <= 0)
{
return;
}
uint sent;
if (Win32Com.GetOverlappedResult(_hPort, _ptrUwo, out sent, _checkSends))
{
_writeCount -= (int)sent;
if (_writeCount != 0)
{
ThrowException("Send Timeout");
}
}
else
{
if (Marshal.GetLastWin32Error() != Win32Com.ERROR_IO_PENDING)
{
ThrowException("Unexpected failure");
}
}
}
/// <summary>
/// Opens the com port and configures it with the required settings
/// </summary>
/// <returns>false if the port could not be opened</returns>
public bool Open()
{
var portDcb = new DCB();
var commTimeouts = new COMMTIMEOUTS();
var wo = new OVERLAPPED();
if (_online)
{
return(false);
}
_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 (Marshal.GetLastWin32Error() == Win32Com.ERROR_ACCESS_DENIED)
{
return(false);
}
throw new CommPortException("Port Open Failure");
}
_online = true;
commTimeouts.ReadIntervalTimeout = 0;
commTimeouts.ReadTotalTimeoutConstant = 0;
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.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");
}
}
if (!Win32Com.SetCommState(_hPort, ref portDcb))
{
ThrowException("Bad com settings");
}
if (!Win32Com.SetCommTimeouts(_hPort, ref commTimeouts))
{
ThrowException("Bad timeout settings");
}
_stateBrk = 0;
if (UseDtr == HsOutput.None)
{
_stateDtr = 0;
}
if (UseDtr == HsOutput.Online)
{
_stateDtr = 1;
}
if (UseRts == HsOutput.None)
{
_stateRts = 0;
}
if (UseRts == HsOutput.Online)
{
_stateRts = 1;
}
_checkSends = CheckAllSends;
wo.Offset = 0;
wo.OffsetHigh = 0;
wo.hEvent = _checkSends ? _writeEvent.Handle : IntPtr.Zero;
_ptrUwo = Marshal.AllocHGlobal(Marshal.SizeOf(wo));
Marshal.StructureToPtr(wo, _ptrUwo, true);
_writeCount = 0;
_rxException = null;
_rxExceptionReported = false;
_rxThread = new Thread(ReceiveThread)
{
Name = "CommBaseRx",
Priority = ThreadPriority.AboveNormal
};
//If not set to true, my application process will not exit completely after UI closed
_rxThread.IsBackground = true;
_rxThread.Start();
Thread.Sleep(1); //Give rx thread time to start. By documentation, 0 should work, but it does not!
_auto = false;
if (AfterOpen())
{
_auto = AutoReopen;
return(true);
}
Close();
return(false);
}
/// <summary>
/// 关闭端口
/// </summary>
public void Close()
{
this.IsOpen = !Win32Com.CloseHandle(_iHandle);
_isWork = false;
}
/// <summary>
/// Check to see if the named com port is available.
/// </summary>
/// <returns>True if port available.</returns>
public bool Available(string portName)
{
Win32Com temp = new Win32Com();
bool status = temp.Open(portName, false);
if(status)
{
temp.Close();
}
temp = null;
return status;
}
/// <summary>
/// Closes and destroys the com port.
/// </summary>
protected void Destroy()
{
// Cancel I/O, kill receiver & close port.
if(this.portOpen)
{
this.port.Cancel();
if(this.rxThread != null)
{
this.rxThread.Abort();
this.rxThread = null;
}
this.port.Close();
this.portOpen = false;
}
// Reinit resources.
this.dcb = null;
this.port = null;
this.stats = null;
this.props = null;
this.tmout = null;
this.rxOvr = null;
this.txOvr = null;
this.escape = null;
this.writeEvent = null;
this.recvrEvent = null;
return;
}
private void ReceiveThread()
{
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.hEvent = sg.Handle;
Marshal.StructureToPtr(ov, unmanagedOv, true);
uint eventMask = 0;
var uMask = Marshal.AllocHGlobal(Marshal.SizeOf(eventMask));
try
{
while (true)
{
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);
if ((eventMask & Win32Com.EV_ERR) != 0)
{
UInt32 errs;
if (Win32Com.ClearCommError(_hPort, out errs, IntPtr.Zero))
{
var s = new StringBuilder("UART Error: ", 40);
if ((errs & Win32Com.CE_FRAME) != 0)
{
s = s.Append("Framing,");
}
if ((errs & Win32Com.CE_IOE) != 0)
{
s = s.Append("IO,");
}
if ((errs & Win32Com.CE_OVERRUN) != 0)
{
s = s.Append("Overrun,");
}
if ((errs & Win32Com.CE_RXOVER) != 0)
{
s = s.Append("Receive Cverflow,");
}
if ((errs & Win32Com.CE_RXPARITY) != 0)
{
s = s.Append("Parity,");
}
if ((errs & Win32Com.CE_TXFULL) != 0)
{
s = s.Append("Transmit Overflow,");
}
s.Length = s.Length - 1;
throw new CommPortException(s.ToString());
}
throw new CommPortException("IO Error [003]");
}
if ((eventMask & Win32Com.EV_RXCHAR) != 0)
{
uint gotbytes;
do
{
if (!Win32Com.ReadFile(_hPort, buf, 1, out gotbytes, unmanagedOv))
{
if (Marshal.GetLastWin32Error() == Win32Com.ERROR_IO_PENDING)
{
Win32Com.CancelIo(_hPort);
gotbytes = 0;
}
else
{
throw new CommPortException("IO Error [004]");
}
}
if (gotbytes == 1)
{
OnRxChar(buf[0]);
}
} while (gotbytes > 0);
}
if ((eventMask & Win32Com.EV_TXEMPTY) != 0)
{
OnTxDone();
}
if ((eventMask & Win32Com.EV_BREAK) != 0)
{
OnBreak();
}
uint i = 0;
if ((eventMask & Win32Com.EV_CTS) != 0)
{
i |= Win32Com.MS_CTS_ON;
}
if ((eventMask & Win32Com.EV_DSR) != 0)
{
i |= Win32Com.MS_DSR_ON;
}
if ((eventMask & Win32Com.EV_RLSD) != 0)
{
i |= Win32Com.MS_RLSD_ON;
}
if ((eventMask & Win32Com.EV_RING) != 0)
{
i |= Win32Com.MS_RING_ON;
}
if (i != 0)
{
uint f;
if (!Win32Com.GetCommModemStatus(_hPort, out f))
{
throw new CommPortException("IO Error [005]");
}
OnStatusChange(new ModemStatus(i), new ModemStatus(f));
}
}
}
catch (Exception e)
{
if (uMask != IntPtr.Zero)
{
Marshal.FreeHGlobal(uMask);
}
if (unmanagedOv != IntPtr.Zero)
{
Marshal.FreeHGlobal(unmanagedOv);
}
if (!(e is ThreadAbortException))
{
_rxException = e;
OnRxException(e);
}
}
}
private static byte readByte(out uint bytesRead)
{
byte[] c = new byte[256];
Win32Com.ReadFile(HPort, c, 1, out bytesRead, IntPtr.Zero);
return(c[0]);
}
private static void sendByte(byte b)
{
uint written = 0;
Win32Com.WriteFile(HPort, new[] { b }, 1, out written, IntPtr.Zero);
}
private void ReceiveSendThreadSerial()
{
var buffer = new byte[64];
var restart = false;
var sendMessageBytes = new byte[0];
int sentBytes = 0;
var sendTimeout = new Stopwatch();
var portHandle = IntPtr.Zero;
Thread.Sleep(1000);
_receivedBytes.Clear();
var resetEvent = new AutoResetEvent(false);
var overlapped = new OVERLAPPED();
var ptrOverlapped = Marshal.AllocHGlobal(Marshal.SizeOf(overlapped));
overlapped.Offset = 0;
overlapped.OffsetHigh = 0;
overlapped.hEvent = resetEvent.SafeWaitHandle.DangerousGetHandle();
Marshal.StructureToPtr(overlapped, ptrOverlapped, true);
bool waitingRead = false;
var writeResetEvent = new AutoResetEvent(false);
var writeOverlapped = new OVERLAPPED();
var ptrWriteOverlapped = Marshal.AllocHGlobal(Marshal.SizeOf(writeOverlapped));
writeOverlapped.Offset = 0;
writeOverlapped.OffsetHigh = 0;
writeOverlapped.hEvent = writeResetEvent.SafeWaitHandle.DangerousGetHandle();;
Marshal.StructureToPtr(writeOverlapped, ptrWriteOverlapped, true);
bool waitingWrite = false;
while (!_receiveSendThreadStopped)
{
try
{
if (portHandle == IntPtr.Zero)
{
int portnumber = Int32.Parse(_comPort.Replace("COM", String.Empty));
string comPort = _comPort;
if (portnumber > 9)
{
comPort = String.Format("\\\\.\\{0}", _comPort);
}
portHandle = Win32Com.CreateFile(comPort, Win32Com.GENERIC_READ | Win32Com.GENERIC_WRITE, 0, IntPtr.Zero,
Win32Com.OPEN_EXISTING, Win32Com.FILE_FLAG_OVERLAPPED, IntPtr.Zero);
if (portHandle == (IntPtr)Win32Com.INVALID_HANDLE_VALUE)
{
if (Marshal.GetLastWin32Error() == Win32Com.ERROR_ACCESS_DENIED)
{
throw new Exception(String.Format("Access denied for port {0}", _comPort));
}
else
{
throw new Exception(String.Format("Failed to open port {0}", _comPort));
}
}
COMMTIMEOUTS commTimeouts = new COMMTIMEOUTS
{
ReadIntervalTimeout = 5,
ReadTotalTimeoutConstant = 0,
ReadTotalTimeoutMultiplier = 0,
WriteTotalTimeoutConstant = 0,
WriteTotalTimeoutMultiplier = 0
};
DCB dcb = new DCB();
dcb.Init(false, false, false, 0, false, false, false, false, 0);
dcb.BaudRate = _baudRate;
dcb.ByteSize = 8;
dcb.Parity = 0;
dcb.StopBits = 0;
if (!Win32Com.SetupComm(portHandle, 8192, 4096))
{
throw new Exception(String.Format("Failed to set queue settings for port {0}", _comPort));
}
if (!Win32Com.SetCommState(portHandle, ref dcb))
{
throw new Exception(String.Format("Failed to set comm settings for port {0}", _comPort));
}
if (!Win32Com.SetCommTimeouts(portHandle, ref commTimeouts))
{
throw new Exception(String.Format("Failed to set comm timeouts for port {0}", _comPort));
}
if (_rtsCts)
{
if (!Win32Com.EscapeCommFunction(portHandle, Win32Com.CLRRTS))
{
throw new Exception(String.Format("Failed to reset RTS pin{0}", _comPort));
}
}
Thread.Sleep(1000);
}
if (!Win32Com.GetHandleInformation(portHandle, out uint lpdwFlags))
{
throw new Exception(String.Format("Port {0} went offline", _comPort));
}
if (!waitingRead)
{
waitingRead = true;
if (!Win32Com.ReadFile(portHandle, buffer, (uint)buffer.Length, out uint readBytes, ptrOverlapped))
{
if (Marshal.GetLastWin32Error() != Win32Com.ERROR_IO_PENDING)
{
throw new Exception(String.Format("Failed to read port {0}", _comPort));
}
}
}
else
{
if (resetEvent.WaitOne(10))
{
waitingRead = false;
if (!Win32Com.GetOverlappedResult(portHandle, ptrOverlapped, out uint readBytes, false))
{
throw new Exception(String.Format("Failed to read port {0}", _comPort));
}
for (int i = 0; i < readBytes; i++)
{
_receivedBytes.Add(buffer[i]);
}
}
}
if (_sendMessageQueue.Count > 0 && sendMessageBytes.Length == 0)
{
lock (_syncobject)
sendMessageBytes = _sendMessageQueue.Dequeue();
sentBytes = 0;
}
if (sendMessageBytes.Length > 0)
{
if (_rtsCts)
{
if (!Win32Com.EscapeCommFunction(portHandle, Win32Com.SETRTS))
{
lock (_syncobject)
_sendExceptionQueue.Enqueue(new SBPSendExceptionEventArgs(new Exception(String.Format("Failed to set RTS pin{0}", _comPort))));
}
}
uint lpmodemstat = 0;
if (_rtsCts)
{
if (!Win32Com.GetCommModemStatus(portHandle, out lpmodemstat))
{
_sendExceptionQueue.Enqueue(new SBPSendExceptionEventArgs(new Exception(String.Format("Failed to get RTS pin{0}", _comPort))));
}
}
if ((lpmodemstat & Win32Com.MS_CTS_ON) > 0 || !_rtsCts)
{
if (!waitingWrite)
{
waitingWrite = true;
sendTimeout.Restart();
if (!Win32Com.WriteFile(portHandle, sendMessageBytes, (uint)sendMessageBytes.Length, out uint sent, ptrWriteOverlapped))
{
if (Marshal.GetLastWin32Error() != Win32Com.ERROR_IO_PENDING)
{
_sendExceptionQueue.Enqueue(new SBPSendExceptionEventArgs(new Exception(String.Format("Failed to write to port {0}", _comPort))));
}
}
}
else
{
if (writeResetEvent.WaitOne(0))
{
if (!Win32Com.GetOverlappedResult(portHandle, ptrWriteOverlapped, out uint sent, false))
{
_sendExceptionQueue.Enqueue(new SBPSendExceptionEventArgs(new Exception(String.Format("Failed to write to port {0}", _comPort))));
}
sentBytes += (int)sent;
}
}
if (sentBytes == sendMessageBytes.Length || sendTimeout.ElapsedMilliseconds > 200)
{
if (sendTimeout.ElapsedMilliseconds > 100)
{
lock (_syncobject)
_sendExceptionQueue.Enqueue(new SBPSendExceptionEventArgs(new Exception(String.Format("Failed to write all bytes to port {0}", _comPort))));
}
if (_rtsCts)
{
if (!Win32Com.EscapeCommFunction(portHandle, Win32Com.CLRRTS))
{
lock (_syncobject)
_sendExceptionQueue.Enqueue(new SBPSendExceptionEventArgs(new Exception(String.Format("Failed to reset RTS pin{0}", _comPort))));
}
}
sendMessageBytes = new byte[0];
waitingWrite = false;
}
}
}
ProcessReading(restart);
restart = false;
}
catch (Exception e)
{
_receivedBytes.Clear();
Win32Com.CancelIo(portHandle);
Win32Com.CloseHandle(portHandle);
portHandle = IntPtr.Zero;
restart = true;
lock (_syncobject)
_readExceptionQueue.Enqueue(new SBPReadExceptionEventArgs(e));
Thread.Sleep(5000);
}
}
Win32Com.CancelIo(portHandle);
Win32Com.CloseHandle(portHandle);
Marshal.FreeHGlobal(ptrOverlapped);
Marshal.FreeHGlobal(ptrWriteOverlapped);
}
/// <summary>
/// Create & opens the com port and configures it with the required settings.
/// </summary>
/// <param name="cfg">Reference to port user config.</param>
/// <returns>True if port opened successfully.</returns>
protected bool Create(SerialCnfg cfg)
{
// If port already open, return.
if(portOpen)
{
this.CommError("Com Port Already Open.");
return false;
}
// Init members.
this.fault = "";
this.rxThread = null;
this.writeEvent = new ManualResetEvent(false);
this.recvrEvent = new ManualResetEvent(false);
// Copy config to DCB.
this.dcb = new Win32DCB(cfg);
// Create handle to comm port.
this.port = new Win32Com();
if((this.portOpen = this.port.Open(cfg.PortName, true)) == false)
{
this.CommError(this.port.Fault);
return false;
}
this.portName = cfg.PortName;
// Instantiate support classes.
this.stats = new Win32Status();
this.tmout = new Win32Tmout();
this.props = new Win32Props();
this.escape = new Win32Escape(port.Handle);
// Set read/write timeouts.
this.tmout.WriteConstant = cfg.TxTmoConst;
this.tmout.WriteMultiplier = cfg.TxTmoMulti;
if(this.tmout.Set(this.port.Handle) == false)
{
this.Destroy();
this.CommError(this.tmout.Fault);
return false;
}
// Overide OS default queue sizes.
if((cfg.RxQueLen != 0) || (cfg.TxQueLen != 0))
{
if(this.props.Set(this.port.Handle, (uint)cfg.RxQueLen, (uint)cfg.TxQueLen) == false)
{
this.Destroy();
this.CommError(this.props.Fault);
return false;
}
}
// Get the current properties.
if(this.props.Get(this.port.Handle) == false)
{
this.Destroy();
this.CommError(this.props.Fault);
return false;
}
// Set flow control limits.
this.dcb.Limits(cfg, this.props.RxCurSize);
// Update the port settings.
if(this.dcb.Set(this.port.Handle) == false)
{
this.Destroy();
this.CommError(this.dcb.Fault);
return false;
}
// XON/OFF extended functionality.
this.escape.XOFFavailable = true;
// RTS extended functionality.
if(cfg.RtsControl == PinState.Disable)
this.escape.RTS = false;
else if(cfg.RtsControl == PinState.Enable)
this.escape.RTS = true;
else if(cfg.RtsControl == PinState.Handshake)
this.escape.RTSavailable = false;
// DTR extended functionality.
if(cfg.DtrControl == PinState.Disable)
this.escape.DTR = false;
else if(cfg.DtrControl == PinState.Enable)
this.escape.DTR = true;
else if(cfg.DtrControl == PinState.Toggle)
this.escape.DTR = false;
else if(cfg.DtrControl == PinState.Handshake)
this.escape.DTRavailable = false;
// Create TX overlap memory pointer.
this.txOvr = new Win32Ovrlap(this.port.Handle, this.writeEvent.Handle);
// Set the receiver mode.
this.immediate = cfg.ReceiveMode;
// Start the receiver thread.
this.rxThread = new Thread(new ThreadStart(ReceiveThread));
this.rxThread.Name = "COMReceiver";
this.rxThread.Priority = ThreadPriority.AboveNormal;
this.rxThread.Start();
// Wait for receive thread to start.
this.recvrEvent.WaitOne(500, false);
// Port opened OK.
return true;
}
public bool OpenCom(String strPort, int iBaudRate)
{
var portDcb = new DCB();
var commTimeouts = new COMMTIMEOUTS();
_hPort = Win32Com.CreateFile(strPort,
Win32Com.GENERIC_READ | Win32Com.GENERIC_WRITE,
0,
IntPtr.Zero,
Win32Com.OPEN_EXISTING,
0,
IntPtr.Zero);
if (_hPort == (IntPtr)Win32Com.INVALID_HANDLE_VALUE)
{
return(false);
}
if (GetCommState(_hPort, ref portDcb))
{
portDcb.BaudRate = iBaudRate;
portDcb.ByteSize = (byte)8;
portDcb.Parity = (byte)0;
portDcb.StopBits = (byte)0;
portDcb.fNull = 0;
portDcb.fParity = 0; /*
* portDcb.XonLim = 32768;
* portDcb.XoffLim = 8192;
* portDcb.XonChar= 17;
* portDcb.XoffChar = 19;
* portDcb.XoffChar = 19;
* portDcb.fOutxCtsFlow = 0;
* portDcb.fOutxDsrFlow = 0;*/
}
else
{
CloseHandle(_hPort);
return(false);
}
SetupComm(_hPort, DATA_BUFFER, DATA_BUFFER);
if (!SetCommState(_hPort, ref portDcb))
{
CloseHandle(_hPort);
return(false);
}
GetCommTimeouts(_hPort, out commTimeouts);
commTimeouts.ReadIntervalTimeout = MAXDWORD;
commTimeouts.ReadTotalTimeoutConstant = 0;
commTimeouts.ReadTotalTimeoutMultiplier = 0;
commTimeouts.WriteTotalTimeoutConstant = MAXDWORD;
commTimeouts.WriteTotalTimeoutMultiplier = 0;
// Set the time-out parameters for all read and write operations on the port.
if (!SetCommTimeouts(_hPort, ref commTimeouts))
{
// Could not create the read thread.
CloseHandle(_hPort);
return(false);
}
// Clear the port of any existing data.
PurgeComm(_hPort, PURGE_TXCLEAR | PURGE_RXCLEAR);
return(true);
}