/// <summary>
/// Open the port specified by the Port property.
/// </summary>
public void Open()
{
if (IsDisposed)
{
throw new ObjectDisposedException("NativeSerialPort");
}
if (string.IsNullOrWhiteSpace(m_Port))
{
throw new InvalidOperationException("Port must first be set");
}
if (IsOpen)
{
throw new InvalidOperationException("Serial Port currently open");
}
m_ComPortHandle = UnsafeNativeMethods.CreateFile(@"\\.\" + m_Port,
NativeMethods.FileAccess.GENERIC_READ | NativeMethods.FileAccess.GENERIC_WRITE,
NativeMethods.FileShare.FILE_SHARE_NONE,
IntPtr.Zero,
NativeMethods.CreationDisposition.OPEN_EXISTING,
NativeMethods.FileAttributes.FILE_FLAG_OVERLAPPED,
IntPtr.Zero);
if (m_ComPortHandle.IsInvalid)
{
WinIOError();
}
NativeMethods.FileType t = UnsafeNativeMethods.GetFileType(m_ComPortHandle);
if (t != NativeMethods.FileType.FILE_TYPE_CHAR && t != NativeMethods.FileType.FILE_TYPE_UNKNOWN)
{
m_ComPortHandle.Close();
m_ComPortHandle = null;
throw new IOException("Wrong Filetype: " + m_Port);
}
// Set the default parameters
UnsafeNativeMethods.SetupComm(m_ComPortHandle, m_DriverInQueue, m_DriverOutQueue);
m_CommState = new CommState(m_ComPortHandle, m_CommState);
m_CommProperties = new CommProperties(m_ComPortHandle);
m_CommModem = new CommModemStatus(m_ComPortHandle);
CommOverlappedIo commIo = new CommOverlappedIo(m_ComPortHandle, m_CommIo, Port);
m_CommIo.Dispose();
m_CommIo = commIo;
}
/// <summary>
/// Opens the serial port specified by <see cref="PortName" />.
/// </summary>
/// <exception cref="System.ObjectDisposedException"/>
/// <exception cref="System.InvalidOperationException">
/// Port must first be set;
/// or
/// Serial Port currently open.
/// </exception>
/// <exception cref="System.IO.IOException">Wrong file type.</exception>
/// <remarks>
/// Opening the serial port does not set any settings (such as baud rate, etc.). On the windows implementation,
/// it only sets the internal driver input and output queue.
/// </remarks>
public void Open()
{
if (m_IsDisposed)
{
throw new ObjectDisposedException("WinNativeSerial");
}
if (string.IsNullOrWhiteSpace(PortName))
{
throw new InvalidOperationException("Port must first be set");
}
if (IsOpen)
{
throw new InvalidOperationException("Serial Port currently open");
}
m_ComPortHandle = UnsafeNativeMethods.CreateFile(@"\\.\" + PortName,
NativeMethods.FileAccess.GENERIC_READ | NativeMethods.FileAccess.GENERIC_WRITE,
NativeMethods.FileShare.FILE_SHARE_NONE,
IntPtr.Zero,
NativeMethods.CreationDisposition.OPEN_EXISTING,
NativeMethods.FileAttributes.FILE_FLAG_OVERLAPPED,
IntPtr.Zero);
if (m_ComPortHandle.IsInvalid)
{
WinIOError();
}
NativeMethods.FileType t = UnsafeNativeMethods.GetFileType(m_ComPortHandle);
bool validOverride = false;
if (t != NativeMethods.FileType.FILE_TYPE_CHAR && t != NativeMethods.FileType.FILE_TYPE_UNKNOWN)
{
foreach (string port in GetPortNames())
{
#if NETSTANDARD15
if (port.Equals(PortName, StringComparison.OrdinalIgnoreCase))
{
validOverride = true;
break;
}
#else
if (port.Equals(PortName, StringComparison.InvariantCultureIgnoreCase))
{
validOverride = true;
break;
}
#endif
}
if (!validOverride)
{
m_ComPortHandle.Dispose();
m_ComPortHandle = null;
throw new IOException("Wrong file type: " + PortName);
}
}
// Set the default parameters
UnsafeNativeMethods.SetupComm(m_ComPortHandle, m_DriverInQueue, m_DriverOutQueue);
m_CommState = new CommState(m_ComPortHandle);
m_CommProperties = new CommProperties(m_ComPortHandle);
m_CommModemStatus = new CommModemStatus(m_ComPortHandle);
m_CommOverlappedIo = new CommOverlappedIo(m_ComPortHandle);
RegisterEvents();
}
