How Do I Communicate With Two Channels In Single Comport

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C#

VB

Windows

Hi I tried to read the values from comport with 2 Channels concurrently. currently i am getting value from only one channel ,how to get the value from second channel, please advise.

Below is the code I tried using threading with delegates.please help me

Thanks in advance
Sheethal

delegate double delcompvalue(int num, SerialPort objports);
delcompvalue fncompvalue = null;
protected IAsyncResult asyncfncompvalue = null;

fncompvalue = new delcompvalue(Read);
Thread t = new Thread(delegate() { fncompvalue.BeginInvoke(0, objport, null, null); });
t.Start();

asyncfncompvalue = fncompvalue.BeginInvoke(0, objport, null, null);
while (true)
{
    if (asyncfncompvalue.IsCompleted)
    break;
}
if (asyncfncompvalue.IsCompleted)
{
    tempread = fncompvalue.EndInvoke(asyncfncompvalue);
}

public double Read(int serno, SerialPort objport)
{
    double tempread = 0;
    // while (_continue)
    {
        try
        {
           tempread = new General().funReadCOM(0, objport);   
        }
        catch (TimeoutException) { }
    }
    // null;
    return tempread;
}

public double funReadCOM(int intCOMContNo, SerialPort objport)
{
    if (objport.IsOpen == false)
    {
        // objport.Open();
    }

    double read1 = 0;
    objport.DiscardInBuffer();
    byte[] buff = new byte[8];
    buff[0] = 1;
    string readValue = "";
    string[] readValue1 = new string[1];
    int readcount = 1;
    int offset = 1;
    string sWord1 = "", sWord2 = "";
    double dResult1 = 0;
    double dMulFactor = 0;
    double dResult = 0;
    //  objport.ReadBufferSize = 0;
    objport.Write(buff, offset, readcount);
    
    do
    {
    
    } while (objport.BytesToRead < 2);

    byte[] buffer = new byte[objport.ReadBufferSize];
    try
    {
        int bytesRead = objport.Read(buffer, 0, 2);
        tString = BitConverter.ToString(buffer.ToArray(), 0, 2);
        sWord2 = tString.Substring(0, 2);
        sWord1 = tString.Substring(3, 2);
        int value = Convert.ToInt32(sWord2, 16);
        
        if (dResult1 == 0)
        {
            dResult = (-1 * (Convert.ToInt32(sWord1, 16) + dMulFactor));
        }
        else if (dResult1 == 2)
        {
            dResult = ((Convert.ToInt32(sWord1, 16) + dMulFactor));
        }
    }
    catch
    {
    }
    return dResult;
}