private void CheckResult()
{
uint nNumberOfBytesTransferred = 0U;
if (writeCount <= 0)
{
return;
}
if (Win32Com.GetOverlappedResult(hPort, ptrUWO, out nNumberOfBytesTransferred, checkSends))
{
if (!checkSends)
{
return;
}
writeCount -= (int)nNumberOfBytesTransferred;
if (writeCount != 0)
{
ThrowException("Send Timeout");
}
writeCount = 0;
}
else
{
if ((long)Marshal.GetLastWin32Error() == 996L)
{
return;
}
ThrowException("Write Error");
}
}
protected void SendImmediate(byte tosend)
{
CheckOnline();
if (Win32Com.TransmitCommChar(hPort, tosend))
{
return;
}
ThrowException("Transmission failure");
}
protected CommBase.ModemStatus GetModemStatus()
{
CheckOnline();
uint lpModemStat;
if (!Win32Com.GetCommModemStatus(hPort, out lpModemStat))
{
ThrowException("Unexpected failure");
}
return(new CommBase.ModemStatus(lpModemStat));
}
private void InternalClose()
{
Win32Com.CancelIo(m_hPort);
if (m_RxThread != null)
{
m_RxThread.Abort();
m_RxThread.Join(100);
m_RxThread = (Thread)null;
}
Win32Com.CloseHandle(m_hPort);
if (m_ptrUWO != IntPtr.Zero)
{
Marshal.FreeHGlobal(m_ptrUWO);
}
}
protected CommBase.QueueStatus GetQueueStatus()
{
CheckOnline();
uint lpErrors;
Win32Com.COMSTAT cs;
if (!Win32Com.ClearCommError(hPort, out lpErrors, out cs))
{
ThrowException("Unexpected failure");
}
Win32Com.COMMPROP cp;
if (!Win32Com.GetCommProperties(hPort, out cp))
{
ThrowException("Unexpected failure");
}
return(new CommBase.QueueStatus(cs.Flags, cs.cbInQue, cs.cbOutQue, cp.dwCurrentRxQueue, cp.dwCurrentTxQueue));
}
private void InternalClose()
{
Win32Com.CancelIo(hPort);
if (rxThread != null)
{
rxThread.Abort();
rxThread.Join(100);
rxThread = (Thread)null;
}
Win32Com.CloseHandle(hPort);
if (ptrUWO != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptrUWO);
}
stateRTS = 2;
stateDTR = 2;
stateBRK = 2;
online = false;
}
public CommBase.PortStatus IsPortAvailable(string s)
{
IntPtr file = Win32Com.CreateFile(s, 3221225472U, 0U, IntPtr.Zero, 3U, 1073741824U, IntPtr.Zero);
if (file == (IntPtr)(-1))
{
if ((long)Marshal.GetLastWin32Error() == 5L)
{
return(CommBase.PortStatus.unavailable);
}
file = Win32Com.CreateFile(AltName(s), 3221225472U, 0U, IntPtr.Zero, 3U, 1073741824U, IntPtr.Zero);
if (file == (IntPtr)(-1))
{
return((long)Marshal.GetLastWin32Error() == 5L ? CommBase.PortStatus.unavailable : CommBase.PortStatus.absent);
}
}
Win32Com.CloseHandle(file);
return(CommBase.PortStatus.available);
}
protected void Send(byte[] tosend)
{
uint lpNumberOfBytesWritten = 0U;
CheckOnline();
CheckResult();
m_writeCount = tosend.GetLength(0);
if (Win32Com.WriteFile(m_hPort, tosend, (uint)m_writeCount, out lpNumberOfBytesWritten, m_ptrUWO))
{
m_writeCount -= (int)lpNumberOfBytesWritten;
}
else
{
if ((long)Marshal.GetLastWin32Error() != 997L)
{
ThrowException("Send failed");
}
}
}
public static PortStatus IsPortAvailable(int iComPort)
{
string comPort = "COM" + iComPort.ToString();
IntPtr file = Win32Com.CreateFile(comPort, 3221225472U, 0U, IntPtr.Zero, 3U, 1073741824U, IntPtr.Zero);
if (file == (IntPtr)(-1))
{
if ((long)Marshal.GetLastWin32Error() == 5L)
{
return(PortStatus.Unavailable);
}
file = Win32Com.CreateFile(AltName(comPort), 3221225472U, 0U, IntPtr.Zero, 3U, 1073741824U, IntPtr.Zero);
if (file == (IntPtr)(-1))
{
return((long)Marshal.GetLastWin32Error() == 5L ? PortStatus.Unavailable : PortStatus.Absent);
}
}
Win32Com.CloseHandle(file);
return(PortStatus.Available);
}
private void ReceiveThread()
{
byte[] lpBuffer = new byte[1];
bool flag = true;
AutoResetEvent autoResetEvent = new AutoResetEvent(false);
Win32Com.OVERLAPPED overlapped = new Win32Com.OVERLAPPED();
uint num1 = 0U;
IntPtr num2 = Marshal.AllocHGlobal(Marshal.SizeOf((object)overlapped));
IntPtr num3 = Marshal.AllocHGlobal(Marshal.SizeOf((object)num1));
overlapped.Offset = 0U;
overlapped.OffsetHigh = 0U;
overlapped.hEvent = autoResetEvent.Handle;
Marshal.StructureToPtr((object)overlapped, num2, true);
try
{
while (Win32Com.SetCommMask(hPort, 509U))
{
Marshal.WriteInt32(num3, 0);
if (flag)
{
startEvent.Set();
flag = false;
}
if (!Win32Com.WaitCommEvent(hPort, num3, num2))
{
if ((long)Marshal.GetLastWin32Error() != 997L)
{
throw new CommPortException("IO Error [002]");
}
autoResetEvent.WaitOne();
}
uint num4 = (uint)Marshal.ReadInt32(num3);
if (((int)num4 & 128) != 0)
{
uint lpErrors;
if (!Win32Com.ClearCommError(hPort, out lpErrors, IntPtr.Zero))
{
throw new CommPortException("IO Error [003]");
}
int num5 = 0;
StringBuilder stringBuilder = new StringBuilder("UART Error: ", 40);
if (((int)lpErrors & 8) != 0)
{
stringBuilder = stringBuilder.Append("Framing,");
++num5;
}
if (((int)lpErrors & 1024) != 0)
{
stringBuilder = stringBuilder.Append("IO,");
++num5;
}
if (((int)lpErrors & 2) != 0)
{
stringBuilder = stringBuilder.Append("Overrun,");
++num5;
}
if (((int)lpErrors & 1) != 0)
{
stringBuilder = stringBuilder.Append("Receive Cverflow,");
++num5;
}
if (((int)lpErrors & 4) != 0)
{
stringBuilder = stringBuilder.Append("Parity,");
++num5;
}
if (((int)lpErrors & 256) != 0)
{
stringBuilder = stringBuilder.Append("Transmit Overflow,");
++num5;
}
if (num5 > 0)
{
stringBuilder.Length = stringBuilder.Length - 1;
throw new CommPortException(stringBuilder.ToString());
}
else
{
if ((int)lpErrors != 16)
{
throw new CommPortException("IO Error [003]");
}
num4 |= 64U;
}
}
if (((int)num4 & 1) != 0)
{
uint nNumberOfBytesRead;
do
{
nNumberOfBytesRead = 0U;
if (!Win32Com.ReadFile(hPort, lpBuffer, 1U, out nNumberOfBytesRead, num2))
{
Marshal.GetLastWin32Error();
throw new CommPortException("IO Error [004]");
}
else if ((int)nNumberOfBytesRead == 1)
{
OnRxChar(lpBuffer[0]);
}
}while (nNumberOfBytesRead > 0U);
}
if (((int)num4 & 4) != 0)
{
lock (empty)
empty[0] = true;
OnTxDone();
}
if (((int)num4 & 64) != 0)
{
OnBreak();
}
uint val = 0U;
if (((int)num4 & 8) != 0)
{
val |= 16U;
}
if (((int)num4 & 16) != 0)
{
val |= 32U;
}
if (((int)num4 & 32) != 0)
{
val |= 128U;
}
if (((int)num4 & 256) != 0)
{
val |= 64U;
}
if ((int)val != 0)
{
uint lpModemStat;
if (!Win32Com.GetCommModemStatus(hPort, out lpModemStat))
{
throw new CommPortException("IO Error [005]");
}
OnStatusChange(new CommBase.ModemStatus(val), new CommBase.ModemStatus(lpModemStat));
}
}
throw new CommPortException("IO Error [001]");
}
catch (Exception ex)
{
Win32Com.CancelIo(hPort);
if (num3 != IntPtr.Zero)
{
Marshal.FreeHGlobal(num3);
}
if (num2 != IntPtr.Zero)
{
Marshal.FreeHGlobal(num2);
}
if (ex is ThreadAbortException)
{
return;
}
rxException = ex;
OnRxException(ex);
}
}
public bool Open()
{
Win32Com.DCB lpDCB = new Win32Com.DCB();
Win32Com.COMMTIMEOUTS lpCommTimeouts = new Win32Com.COMMTIMEOUTS();
Win32Com.OVERLAPPED overlapped = new Win32Com.OVERLAPPED();
if (online)
{
return(false);
}
CommBase.CommBaseSettings commBaseSettings = CommSettings();
hPort = Win32Com.CreateFile(commBaseSettings.port, 3221225472U, 0U, IntPtr.Zero, 3U, 1073741824U, IntPtr.Zero);
if (hPort == (IntPtr)(-1))
{
if ((long)Marshal.GetLastWin32Error() == 5L)
{
return(false);
}
hPort = Win32Com.CreateFile(AltName(commBaseSettings.port), 3221225472U, 0U, IntPtr.Zero, 3U, 1073741824U, IntPtr.Zero);
if (hPort == (IntPtr)(-1))
{
if ((long)Marshal.GetLastWin32Error() == 5L)
{
return(false);
}
else
{
throw new CommPortException("Port Open Failure");
}
}
}
online = true;
lpCommTimeouts.ReadIntervalTimeout = uint.MaxValue;
lpCommTimeouts.ReadTotalTimeoutConstant = 0U;
lpCommTimeouts.ReadTotalTimeoutMultiplier = 0U;
lpCommTimeouts.WriteTotalTimeoutMultiplier = (int)commBaseSettings.sendTimeoutMultiplier != 0 ? commBaseSettings.sendTimeoutMultiplier : (Environment.OSVersion.Platform != PlatformID.Win32NT ? 10000U : 0U);
lpCommTimeouts.WriteTotalTimeoutConstant = commBaseSettings.sendTimeoutConstant;
lpDCB.init(commBaseSettings.parity == CommBase.Parity.odd || commBaseSettings.parity == CommBase.Parity.even, commBaseSettings.txFlowCTS, commBaseSettings.txFlowDSR, (int)commBaseSettings.useDTR, commBaseSettings.rxGateDSR, !commBaseSettings.txWhenRxXoff, commBaseSettings.txFlowX, commBaseSettings.rxFlowX, (int)commBaseSettings.useRTS);
lpDCB.BaudRate = commBaseSettings.baudRate;
lpDCB.ByteSize = (byte)commBaseSettings.dataBits;
lpDCB.Parity = (byte)commBaseSettings.parity;
lpDCB.StopBits = (byte)commBaseSettings.stopBits;
lpDCB.XoffChar = (byte)commBaseSettings.XoffChar;
lpDCB.XonChar = (byte)commBaseSettings.XonChar;
if ((commBaseSettings.rxQueue != 0 || commBaseSettings.txQueue != 0) && !Win32Com.SetupComm(hPort, (uint)commBaseSettings.rxQueue, (uint)commBaseSettings.txQueue))
{
ThrowException("Bad queue settings");
}
if (commBaseSettings.rxLowWater == 0 || commBaseSettings.rxHighWater == 0)
{
Win32Com.COMMPROP cp;
if (!Win32Com.GetCommProperties(hPort, out cp))
{
cp.dwCurrentRxQueue = 0U;
}
lpDCB.XoffLim = cp.dwCurrentRxQueue <= 0U ? (lpDCB.XonLim = (short)8) : (lpDCB.XonLim = (short)((int)cp.dwCurrentRxQueue / 10));
}
else
{
lpDCB.XoffLim = (short)commBaseSettings.rxHighWater;
lpDCB.XonLim = (short)commBaseSettings.rxLowWater;
}
if (!Win32Com.SetCommState(hPort, ref lpDCB))
{
ThrowException("Bad com settings");
}
if (!Win32Com.SetCommTimeouts(hPort, ref lpCommTimeouts))
{
ThrowException("Bad timeout settings");
}
stateBRK = 0;
if (commBaseSettings.useDTR == CommBase.HSOutput.none)
{
stateDTR = 0;
}
if (commBaseSettings.useDTR == CommBase.HSOutput.online)
{
stateDTR = 1;
}
if (commBaseSettings.useRTS == CommBase.HSOutput.none)
{
stateRTS = 0;
}
if (commBaseSettings.useRTS == CommBase.HSOutput.online)
{
stateRTS = 1;
}
checkSends = commBaseSettings.checkAllSends;
overlapped.Offset = 0U;
overlapped.OffsetHigh = 0U;
overlapped.hEvent = !checkSends ? IntPtr.Zero : writeEvent.Handle;
ptrUWO = Marshal.AllocHGlobal(Marshal.SizeOf((object)overlapped));
Marshal.StructureToPtr((object)overlapped, ptrUWO, true);
writeCount = 0;
empty[0] = true;
dataQueued = false;
rxException = (Exception)null;
rxExceptionReported = false;
rxThread = new Thread(new ThreadStart(ReceiveThread));
rxThread.Name = "CommBaseRx";
rxThread.Priority = ThreadPriority.AboveNormal;
rxThread.Start();
startEvent.WaitOne(500, false);
auto = false;
if (AfterOpen())
{
auto = commBaseSettings.autoReopen;
return(true);
}
else
{
Close();
return(false);
}
}
internal static extern bool GetCommTimeouts(IntPtr hFile, out Win32Com.COMMTIMEOUTS lpCommTimeouts);
internal static extern bool GetCommState(IntPtr hFile, ref Win32Com.DCB lpDCB);
internal static extern bool GetCommProperties(IntPtr hFile, out Win32Com.COMMPROP cp);
internal static extern bool ClearCommError(IntPtr hFile, out uint lpErrors, out Win32Com.COMSTAT cs);
internal static extern bool BuildCommDCBAndTimeouts(string lpDef, ref Win32Com.DCB lpDCB, ref Win32Com.COMMTIMEOUTS lpCommTimeouts);