DataReceived not working when using 2 serial ports

NETMF & Gadgeteer
1

Im using a Fez Domino connected to a RN42 on COM1 and a XBee on COM4(REMAPPED) but serial data receive event works only on the last declared port.
There is a special consideration to use multiple com ports.

2

Please show your code.

3 
namespace AlarmaV1
{
    public delegate void DataReceivedEventHandler(string data);

    public class SerialDevice
    {
        static SerialPort com;
        static Thread receiveThread;

        public event DataReceivedEventHandler DataReceived;

        void RemapCOM4()
        {
            if (com.PortName != "COM4")
                return;

            if (!com.IsOpen)
                throw new Exception("Only use COM4 and make sure it is open");

            Register PINSEL9 = new Register(0xE002C024);
            PINSEL9.Write(0);// COM4 is now disconnected from P4.28 and P4.29
            Register PINSEL1 = new Register(0xE002C004);
            PINSEL1.SetBits(0xf << 18);// COM4 is now connected to An3 and An4
        }

        public SerialDevice(string port, int baudRate)
        {
            com = new SerialPort(port,baudRate,Parity.None,8,StopBits.One);
            com.BaudRate = baudRate;
            com.DataReceived += new SerialDataReceivedEventHandler(com_DataReceived);
        }

        public void Open()
        {
            try
            {
                com.Open();
                RemapCOM4();
                receiveThread.Start();
            }
            catch (Exception ex)
            { 
                Debug.Print("Exception: " + ex.Message);
            }            
        }

        public void Close()
        {
            try
            {
                receiveThread.Abort();
                com.DiscardInBuffer();
                com.DiscardOutBuffer();
                com.Close();
            }
            catch (Exception ex)
            {
                Debug.Print("Exception: " + ex.Message);
            }
        }

        void com_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            try
            {
                int r = 0;
                string msg = "";

                r = com.BytesToRead;
                if (r <= 0)
                    return;
                byte[] bytes = new byte[r];
                com.Read(bytes, 0, r);
                msg = new string(System.Text.Encoding.UTF8.GetChars(bytes));
                onDataReceived(msg);
            }
            catch (Exception ex)
            {
                Debug.Print("Exception: " + ex.Message);
            }
        }

        void onDataReceived(string data)
        {
            if (DataReceived != null)
                DataReceived(data);
        }

        public void Send(string data)
        {
            if(com.IsOpen)
                com.Write(System.Text.Encoding.UTF8.GetBytes(data), 0, data.Length);
        }
    }
}
4 
namespace AlarmaV1
{
    public class Program
    {
        static string EOM = new string(System.Text.UTF8Encoding.UTF8.GetChars(new byte[]{0x13}));
        static SerialDevice RN42;
        static SerialDevice XBee;
        static bool ledState = false;
        static OutputPort led;
        static Thread LEDBlinker;


        public static void Setup()
        {

            led = new OutputPort((Cpu.Pin)FEZ_Pin.Digital.LED, ledState);

            RN42 = new SerialDevice("COM1", 115200);
            RN42.DataReceived += new DataReceivedEventHandler(RN42_DataReceived);
            RN42.Open();

            XBee = new SerialDevice("COM4", 9600);
            XBee.DataReceived += new DataReceivedEventHandler(XBee_DataReceived);
            XBee.Open();

            XBee.Send("+++");
            Thread.Sleep(50);
            XBee.Send("ATDN REMOTEMKI" + EOM);
            Thread.Sleep(20);
            XBee.Send("ATCN" + EOM);
            Thread.Sleep(50);

            

            LEDBlinker = new Thread(blink);
            LEDBlinker.Start();

        }

        static void XBee_DataReceived(string data)
        {
            Debug.Print("XBee: "+data);
            XBee.Send("Read: " + data.Length);
        }

        static void blink()
        {
            while (true)
            {
                Thread.Sleep(500);

                // toggle LED state
                ledState = !ledState;
                led.Write(ledState);
            }
        }

        static void RN42_DataReceived(string data)
        {
            Debug.Print("RN42: "+data);
            RN42.Send("Read: " + data.Length);
            //XBee.Send("BT Read: " + data.Length);
        }

        public static void Loop()
        {
            //Debug.Print("Loop");
        }

        public static void Main()
        {
            try
            {
                Setup();

                while (true)
                {
                    Loop();
                }
            }
            catch (Exception ex)
            {
                Debug.Print("Something wwent wrong, exception: " + ex.Message);
            }
        }

    }
}
5

I posted the code, I think its very easy, but the problem is that the XBee instance is properly working, and RN42 isnt.

Only work if I use a single instace of my class.

Any help is apreciated.

6

try registering for serial event after open() not before.

and in main put a thread.sleep() in loop

7

I tried your suggestions, but no work, also im using Visual Studio 2010 Express C# and when I start debugging a VS exception constantly appears, but I ignore it (it appears on all my projects, its really annoying)

Any other ideas? :S

Thanks in advance

8

What exception is that?