public 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 (port_name != null && !port_name.StartsWith(@"\\.\") ? @"\\.\" + port_name : 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); wo.EventHandle = write_event.Handle; write_overlapped = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (NativeOverlapped))); Marshal.StructureToPtr (wo, write_overlapped, true); NativeOverlapped ro = new NativeOverlapped (); read_event = new ManualResetEvent (false); ro.EventHandle = read_event.Handle; read_overlapped = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (NativeOverlapped))); Marshal.StructureToPtr (ro, read_overlapped, true); }
static extern bool SetCommTimeouts(int handle, Timeouts timeouts);