/// <summary>
/// Start the I/O thread.
/// </summary>
public void Start()
{
m_IsRunning = true;
try {
if (m_Buffers == null) m_Buffers = new OverlappedIoState(m_ReadBufferSize, m_WriteBufferSize);
// Set the time outs
NativeMethods.COMMTIMEOUTS timeouts = new NativeMethods.COMMTIMEOUTS();
// We read only the data that is buffered
#if PL2303_WORKAROUNDS
// Timeout if data hasn't arrived in 10ms, or if the read takes longer than 100ms in total
timeouts.ReadIntervalTimeout = 10;
timeouts.ReadTotalTimeoutConstant = 100;
timeouts.ReadTotalTimeoutMultiplier = 0;
#else
// Non-asynchronous behaviour
timeouts.ReadIntervalTimeout = -1;
timeouts.ReadTotalTimeoutConstant = 0;
timeouts.ReadTotalTimeoutMultiplier = 0;
#endif
// We have no time outs when writing
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = 500;
bool result = UnsafeNativeMethods.SetCommTimeouts(m_ComPortHandle, ref timeouts);
if (!result) throw new IOException("Couldn't set CommTimeouts", Marshal.GetLastWin32Error());
m_Thread = new Thread(new ThreadStart(OverlappedIoThread));
m_Thread.Name = "SerialPortStream_" + Name;
m_Thread.IsBackground = true;
m_Thread.Start();
} catch {
m_IsRunning = false;
throw;
}
}
public static extern bool SetCommTimeouts(SafeFileHandle hFile,
[In] ref NativeMethods.COMMTIMEOUTS lpCommTimeouts);