C#

<li ID='45'>

Quote:

var versionPtr = GetPropellerVersion();

Quote:

[DllImport("Propellent.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr GetPropellerVersion();

Quote:

Unhandled Exception: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at program.GetPropellerVersion()
at program.btnDetectPort_Click(Object sender, EventArgs e) in program\Form1.cs:line 1750
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NatiThe program '[48096] program.exe: Managed (v2.0.50727)' has exited with code -1073741819 (0xc0000005) 'Access violation'.
veWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at program.Program.Main() in program\Program.cs:line 19

private void btnDetectPort_Click(object sender, EventArgs e)
        {
            cbxSerialPort.Items.Clear();
            string[] ports = SerialPort.GetPortNames();
            foreach (string port in ports)
            {
                cbxSerialPort.Items.Add(port);
                cbxSerialPort.SelectedIndex = 0;
                serialPort1.PortName = port;
                serialPort1.BaudRate = 115200;
                serialPort1.Encoding = Encoding.ASCII;

                try
                {
                    serialPort1.Open();
                    this.Invoke(new EventHandler(delegate
                    {
                        serialPort1.Close();
                    }));
                }
                catch (Exception)
                {
                   // do nothing
                }

            }

            var versionPtr = GetPropellerVersion();                     // error here
            string version = Marshal.PtrToStringAnsi(versionPtr);       

            int delimiter = version.IndexOf(':');
            if (delimiter > -1)
            {
                string comPort = version.Remove(delimiter - 1);
                string firmWare = version.Remove(0, delimiter + 2);
                tbxPropPortFound.Text = comPort;
                                int comPortIndex = cbxSerialPort.FindString(comPort);
                cbxSerialPort.SelectedIndex = comPortIndex;
            }
        }