protected CommBase.ModemStatus GetModemStatus()
{
CheckOnline();
uint lpModemStat;
if (!Win32Com.GetCommModemStatus(hPort, out lpModemStat))
{
ThrowException("Unexpected failure");
}
return(new CommBase.ModemStatus(lpModemStat));
}
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);
}
}
