private void ReceiveThread()
{
byte[] lpBuffer = new byte[1];
bool flag = true;
AutoResetEvent event2 = new AutoResetEvent(false);
Win32Com.OVERLAPPED structure = new Win32Com.OVERLAPPED();
uint num2 = 0;
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf(structure));
IntPtr ptr2 = Marshal.AllocHGlobal(Marshal.SizeOf(num2));
structure.Offset = 0;
structure.OffsetHigh = 0;
structure.hEvent = event2.Handle;
Marshal.StructureToPtr(structure, ptr, true);
try
{
while (true)
{
if (!Win32Com.SetCommMask(this.hPort, 0x1fd))
{
throw new CommPortException("IO Error [001]");
}
Marshal.WriteInt32(ptr2, 0);
if (flag)
{
this.startEvent.Set();
flag = false;
}
if (!Win32Com.WaitCommEvent(this.hPort, ptr2, ptr))
{
if (Marshal.GetLastWin32Error() != 0x3e5L)
{
throw new CommPortException("IO Error [002]");
}
event2.WaitOne();
}
num2 = (uint)Marshal.ReadInt32(ptr2);
if ((num2 & 0x80) != 0)
{
uint num3;
if (!Win32Com.ClearCommError(this.hPort, out num3, IntPtr.Zero))
{
throw new CommPortException("IO Error [003]");
}
int num4 = 0;
StringBuilder builder = new StringBuilder("UART Error: ", 40);
if ((num3 & 8) != 0)
{
builder = builder.Append("Framing,");
num4++;
}
if ((num3 & 0x400) != 0)
{
builder = builder.Append("IO,");
num4++;
}
if ((num3 & 2) != 0)
{
builder = builder.Append("Overrun,");
num4++;
}
if ((num3 & 1) != 0)
{
builder = builder.Append("Receive Cverflow,");
num4++;
}
if ((num3 & 4) != 0)
{
builder = builder.Append("Parity,");
num4++;
}
if ((num3 & 0x100) != 0)
{
builder = builder.Append("Transmit Overflow,");
num4++;
}
if (num4 > 0)
{
builder.Length--;
throw new CommPortException(builder.ToString());
}
if (num3 != 0x10)
{
throw new CommPortException("IO Error [003]");
}
num2 |= 0x40;
}
if ((num2 & 1) != 0)
{
uint num;
do
{
num = 0;
if (!Win32Com.ReadFile(this.hPort, lpBuffer, 1, out num, ptr))
{
int num5 = Marshal.GetLastWin32Error();
throw new CommPortException("IO Error [004]");
}
if (num == 1)
{
this.OnRxChar(lpBuffer[0]);//这个就是触发事件
}
}while (num > 0);
}
if ((num2 & 4) != 0)
{
lock (this.empty)
{
this.empty[0] = true;
}
this.OnTxDone();
}
if ((num2 & 0x40) != 0)
{
this.OnBreak();
}
uint val = 0;
if ((num2 & 8) != 0)
{
val |= 0x10;
}
if ((num2 & 0x10) != 0)
{
val |= 0x20;
}
if ((num2 & 0x20) != 0)
{
val |= 0x80;
}
if ((num2 & 0x100) != 0)
{
val |= 0x40;
}
if (val != 0)
{
uint num7;
if (!Win32Com.GetCommModemStatus(this.hPort, out num7))
{
throw new CommPortException("IO Error [005]");
}
this.OnStatusChange(new ModemStatus(val), new ModemStatus(num7));
}
}
}
catch (Exception exception)
{
Win32Com.CancelIo(this.hPort);
if (ptr2 != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptr2);
}
if (ptr != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptr);
}
if (!(exception is ThreadAbortException))
{
this.rxException = exception;
this.OnRxException(exception);
}
}
}
