public static extern Boolean GetCommTimeouts(IntPtr hFile, out COMMTIMEOUTS lpCommTimeouts);
/// <summary>
/// ³������� ���-�����
/// </summary>
/// <param name="portIndex">����� �����</param>
/// <returns>���� true �� ���-���� �������� ������</returns>
public bool Open(int portIndex)
{
string portName = "COM" + portIndex.ToString() + ":";
handle = API.CreateFile(portName, (UInt32)(winapi.dwDesiredAccess.GENERIC_READ | winapi.dwDesiredAccess.GENERIC_WRITE),
0, IntPtr.Zero, (UInt32)winapi.dwCreationDisposion.OPEN_EXISTING, (UInt32)winapi.dwFileFlags.FILE_FLAG_OVERLAPPED, IntPtr.Zero);
if (handle == (IntPtr)API.INVALID_HANDLE_VALUE)
return false;
DCB _dcb = new DCB();
API.GetCommState(handle, ref _dcb);
//Setup dcb
_dcb.BaudRate = (int)this.baudRate;
//Clear RtsControl
_dcb.Flags &= 0x7FFFCFFF;
//Clear DsrControl
_dcb.Flags &= 0x7FFFFFCF;
//Set fBinary to 1
_dcb.Flags |= 0x00000001;
//Set fParity to 1
_dcb.Flags |= 0x00000002;
_dcb.ByteSize = (byte)this.dataBits;
_dcb.Parity = (byte)this.parity;
_dcb.StopBits = (byte)this.stopBits;
//Handflow
_dcb.XonLim = 2048;
_dcb.XoffLim = 512;
_dcb.XonChar = (char)0x11;
_dcb.XoffChar = (char)0x13;
if (!API.SetCommState(handle, ref _dcb))
{
System.Windows.Forms.MessageBox.Show("����� ���������� ��������� �����", "COM ����",
System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Error);
return false;
}
COMMTIMEOUTS _tOut = new COMMTIMEOUTS();
API.GetCommTimeouts(handle, out _tOut);
//Setup timeouts
_tOut.ReadIntervalTimeout = ReadIntervalTimeout;
_tOut.ReadTotalTimeoutConstant = ReadTotalTimeoutConstant;
_tOut.ReadTotalTimeoutMultiplier = ReadTotalTimeoutMultiplier;
_tOut.WriteTotalTimeoutConstant = WriteTotalTimeoutConstant;
_tOut.WriteTotalTimeoutMultiplier = WriteTotalTimeoutMultiplier;
if (!API.SetCommTimeouts(handle, ref _tOut))
{
System.Windows.Forms.MessageBox.Show("����� ���������� �������� �����", "COM ����",
System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Error);
return false;
}
API.PurgeComm(handle, API.PURGE_TXCLEAR);
API.PurgeComm(handle, API.PURGE_RXCLEAR);
isOpen = true;
return true;
}
public static extern Boolean BuildCommDCBAndTimeouts(String lpDef, ref DCB lpDCB,
ref COMMTIMEOUTS lpCommTimeouts);