windows stopped working while communicate with "COM PORT"

Here is my code...

public FrmHome() //Constructor

{

InitializeComponent();

OpenSerialPort();

}

~FrmHome()

{

serialPort1.Close();

}

private void OpenSerialPort()

{

try

{

if (!string.IsNullOrEmpty(Properties.Settings.Default.COMPort.ToString()))

{

serialPort1 = new SerialPort();

serialPort1.PortName = Properties.Settings.Default.COMPort.ToString();

serialPort1.BaudRate = Convert.ToInt32(Properties.Settings.Default.COMBaudRate.ToString());

serialPort1.DataBits = Convert.ToInt32(Properties.Settings.Default.COMDataBits.ToString());

serialPort1.StopBits = (StopBits)Enum.Parse(typeof(StopBits), Properties.Settings.Default.COMStopBits.ToString());

serialPort1.Parity = (Parity)Enum.Parse(typeof(Parity), Properties.Settings.Default.COMParityBits.ToString());

serialPort1.RtsEnable = false;

serialPort1.DtrEnable = false;

serialPort1.Handshake = Handshake.None;

serialPort1.ReadTimeout = 10000;

serialPort1.ReadTimeout = 500;

serialPort1.WriteTimeout = 500;

serialPort1.Open();

}

else

{

MessageBox.Show("ComPort Settings aren't yet Done.");

}

private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)

{

//i tried the following three methods

SerialPortdataIN = serialPort1.ReadExisting();

//SerialPortdataIN = serialPort1.Read();

//SerialPortdataIN = serialPort1.ReadLine();

this.Invoke(new EventHandler(ShowData));

}

private void ShowData(object sender, EventArgs e)

{

labeldisplayReader.Text = SerialPortdataIN; // showing weight from com port

}

private void FrmHome_FormClosing(object sender, FormClosingEventArgs e)

{

if (serialPort1.IsOpen)

{

serialPort1.Close();

}

im trying to read data from com port and displaying in my application..

while APPLICATION START im start reading from com port (for eg. from COM2 Port).

but it showing error like "windows stopped working" when application start running.

i find out COM port communication is problem. because if i gave COM1 insted of COM2 (COM2 is actual port COM1 is not present) application is running fine.

when i run my application my giving correct com port value like COM2 .. then it showing error "windows stopped working" ...

it raised me many doubt's..

i should use any threading operation ?? bec upto now im not using any threading opeartion.. (if it is... pls give me any example or any web link)

either i need to do any modification in my codings ???

Hi Saravanan,

Have you followed this(below) link to build your routine??

https://msdn.microsoft.com/en-us/library/system.io.ports.serialport.readline(v=vs.110).aspx

COM Port Selection, port availability and baud rate selection is listed among the common communication problems when involving serial connections.Also COM port you select in the software must match the physical port on the PC used for the connection.

Visit this web-link:- https://stackoverflow.com/questions/39294081/serial-port-communication-on-the-same-windows-machine-not-working

Here great answer has been given by Yvette Colomb.

Also visit this link, it would be of great help to you :https://stackoverflow.com/questions/29096766/make-serialport-close-and-stop-read-data-on-window-closing

Hope it helps.

Thanks.

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Rajneesh Chaubey8y ago
Hi Saravanan,
Have you followed this(below) link to build your routine??
https://msdn.microsoft.com/en-us/library/system.io.ports.serialport.readline(v=vs.110).aspx
COM Port Selection, port availability and baud rate selection is listed among the common communication problems when involving serial connections.Also COM port you select in the software must match the physical port on the PC used for the connection.
Visit this web-link:- https://stackoverflow.com/questions/39294081/serial-port-communication-on-the-same-windows-machine-not-working
Here great answer has been given by Yvette Colomb.
Also visit this link, it would be of great help to you :https://stackoverflow.com/questions/29096766/make-serialport-close-and-stop-read-data-on-window-closing
Hope it helps.
Thanks.
+1