C#

<br />
using System;<br />
using System.Collections.Generic;<br />
using System.Text;<br />
using System.IO.Ports;<br />
using System.Timers;<br />
<br />
<br />
namespace test<br />
{<br />
<br />
    public partial class testsupport<br />
    {<br />
        private System.IO.Ports.SerialPort port;<br />
        private Timer timeoutRecvTimer = new Timer();<br />
        private Timer noMoreDataTimer = new Timer();<br />
<br />
        public testsupport()<br />
	{<br />
            port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);<br />
            timeoutRecvTimer.Elapsed += new ElapsedEventHandler(timeoutRecvTimer_Elapsed);<br />
            GC.KeepAlive(timeoutRecvTimer);<br />
        }<br />
<br />
        void timeoutRecvTimer_Elapsed(object sender, ElapsedEventArgs e)<br />
        {<br />
            timeoutRecvTimer.Stop();<br />
            log.AddMessage("Timeout happened.", true);<br />
            throw new System.TimeoutException("No data received, device correctly connected?");<br />
        }<br />
<br />
        void port_DataReceived(object sender, SerialDataReceivedEventArgs e)<br />
        {<br />
            port.Read(buffer, buffer.GetLength(0), port.BytesToRead);<br />
<br />
            timeoutRecvTimer.Interval = 2000;<br />
            timeoutRecvTimer.Start();<br />
        }<br />
<br />
        public bool DoSomething(int timeout)<br />
        {<br />
		... doing something here ...<br />
<br />
            // initialize timer for timeout handling<br />
            timeoutRecvTimer.Interval = timeout;<br />
            timeoutRecvTimer.Start();<br />
<br />
            return true;<br />
        }<br />
<br />
    }<br />
<br />
    public class Tester<br />
    {<br />
        static int Main(string[] args)<br />
        {<br />
            try<br />
            {<br />
                testsupport testing = new testsupport();<br />
<br />
<br />
                if (!testing.initComport())<br />
                    return 1;<br />
<br />
                if (!testing.DoSomething(2000))<br />
                {<br />
                    // command was not successfully sent<br />
                    return 1;<br />
                }<br />
                <br />
                while (true)<br />
                {<br />
                  // do a endless loop to see timeout exception -> timeout works but no exception!!! why?<br />
                } <br />
<br />
            }<br />
            catch (Exception ex)<br />
            {<br />
                Console.WriteLine(ex.Message);<br />
            }<br />
<br />
            return 0;<br />
        }<br />
<br />
    }<br />
}<br />