internal WinSerialStream(string port_name, int baud_rate, int data_bits, Parity parity, StopBits sb,
bool dtr_enable, bool rts_enable, Handshake hs, int read_timeout, int write_timeout,
int read_buffer_size, int write_buffer_size)
{
handle = CreateFile(String.Format("\\\\.\\{0}", port_name), GenericRead | GenericWrite, 0, 0, OpenExisting,
FileFlagOverlapped, 0);
if (handle == -1)
{
ReportIOError(port_name);
}
// Set port low level attributes
SetAttributes(baud_rate, parity, data_bits, sb, hs);
// Clean buffers and set sizes
if (!PurgeComm(handle, PurgeRxClear | PurgeTxClear) ||
!SetupComm(handle, read_buffer_size, write_buffer_size))
{
ReportIOError(null);
}
// Set timeouts
this.read_timeout = read_timeout;
this.write_timeout = write_timeout;
timeouts = new Timeouts(read_timeout, write_timeout);
if (!SetCommTimeouts(handle, timeouts))
{
ReportIOError(null);
}
/// Set DTR and RTS
SetSignal(SerialSignal.Dtr, dtr_enable);
if (hs != Handshake.RequestToSend &&
hs != Handshake.RequestToSendXOnXOff)
{
SetSignal(SerialSignal.Rts, rts_enable);
}
// Init overlapped structures
NativeOverlapped wo = new NativeOverlapped();
write_event = new ManualResetEvent(false);
#if NET_2_0
wo.EventHandle = write_event.Handle;
#else
wo.EventHandle = write_event.SafeWaitHandle.DangerousGetHandle();
#endif
write_overlapped = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(NativeOverlapped)));
Marshal.StructureToPtr(wo, write_overlapped, true);
NativeOverlapped ro = new NativeOverlapped();
read_event = new ManualResetEvent(false);
#if NET_2_0
ro.EventHandle = read_event.Handle;
#else
ro.EventHandle = read_event.SafeWaitHandle.DangerousGetHandle();
#endif
read_overlapped = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(NativeOverlapped)));
Marshal.StructureToPtr(ro, read_overlapped, true);
}
static extern bool SetCommTimeouts(int handle, Timeouts timeouts);