Need a wait for data type pause in C#....

[GlennP]

Hi All,
I am trying to perfect a bit of test code for a device we have updated (amongst other thing replaced a 9 Way with USB) I want to a method of waiting for a command to come back,the  routine waits while there are no bytes in the buffer and the time is less the value passed to it.
The version in red is the version that is in use now is this recommended as it uses a Thread Sleep and it is important not to lock the machine up

Glenn
   
    public int WaitForData(int NbDataToWait, int Timeout)
          {         
                        int timeWaited = 0;
                        int timeToWait = 1; // 1 ms
                       
                                                                                     // && there is no > in reply
                        while (timeWaited < Timeout && BytesToRead < NbDataToWait)// && myComPort.BytesToRead(">"))
                        {
                            timeWaited += timeToWait;
                            lblwhere.Text += ".";
                            System.Threading.Thread.Sleep(timeToWait );
                        }

            return timeWaited;

        }
      /* public int WaitForDataOK(int NbDataToWait, int Timeout)
        {
            int timeWaited = 0;
            int timeToWait = 1; // 1 ms

            // && there is no > in reply
            while (timeWaited < Timeout &&  myComPort.BytesToRead > 0)
            {
                timeWaited += timeToWait;
                lblwhere.Text += ".";
                System.Threading.Thread.Sleep(timeToWait);
            }

            return timeWaited;

        }
         */

[Jan Axelson]

Thread sleep sleeps the thread. The application can have other threads that are awake.

See my Com Port Terminal example for a way to do it with the DataReceived event:

http://www.lvr.com/serport.htm#my_example_code

Jan

[GlennP]

Thanks for that I had solve it sort of.