[Mono-dev] Mono C# Serial Port problem

[christopher jones]

Hi guys, I had som eissues with the RS232 implementation in mono. I found
that the example of using polling did not work inside linux and would like
to suggest the following code instead:

I have tried this on both Windows and under linux in a virtual Fedora
machine and it does work.



using System;
using System.Collections.Generic;
using System.IO.Ports;

public class SerialPortTest
{
    public static void Main(string[] args)
    {
        SerialPortTest myTest = new SerialPortTest();
        myTest.Test();
    }

    private SerialPort mySerial;

    // Constructor
    public SerialPortTest()
    {
    }

    public void Test()
    {
        if (mySerial != null)
            if (mySerial.IsOpen)
                mySerial.Close();

        mySerial = new SerialPort("/dev/ttyS0", 19200);
        mySerial.Open();
        mySerial.ReadTimeout = 400;
      
        while (true)
        {
            Console.WriteLine(ReadData());
        }
    }

    public string ReadData()
    {
        byte tmpByte;
        string rxString = "";

        try
        {
           
            tmpByte = (byte)mySerial.ReadByte();

            while (true)
            {
                Console.WriteLine("Data Received");
                try
                {
                    rxString += ((char)tmpByte);
                    tmpByte = (byte)mySerial.ReadByte();
                }
                catch
                {
                    rxString += "!2";       
                    break;
                }
            }

        }
        catch 
        {
            rxString+="!1";
        }
        return rxString;
    }

    public bool SendData(string Data)
    {
        mySerial.Write(Data);
        return true;
    }
}
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