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);
}
}
extern internal static bool SetCommTimeouts(IntPtr hFile, [In] ref Win32Com.COMMTIMEOUTS lpCommTimeouts);
extern internal static bool GetCommTimeouts(IntPtr hFile, out Win32Com.COMMTIMEOUTS lpCommTimeouts);
extern internal static bool BuildCommDCBAndTimeouts(string lpDef, ref Win32Com.DCB lpDCB, ref Win32Com.COMMTIMEOUTS lpCommTimeouts);
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;
}
}