Non obstructive wait, using WaitForSingleObject.....

darn clicked on wrong button question finished not posted

hi all,

i trying write c# app interface board have designed have used serialdatareceived event  to pick data issue need way of using asynchronous read waitforsingleobject  how can used in c# examples can find c++.

what trying write app interface board via usb serial

the issue using monitor can see data being sent , replies happening 2 crossing. complete string sent  , wait for  ok, > or period of time (.timeout)  i think waitforsingleobject might need example.

        public int waitfordata(int timeout)         {          //   bool respond = false;             //bool waitforprompt = false;              stopwatch sw = stopwatch.startnew();                 this.invoke(new methodinvoker(delegate()                {                    replydata = rtbincoming.text;                }));                  //if((replydata.contains(">")||(replydata.contains("ok"))))                 //                   respond = true;                 //else                 //                    respond = false;              while (sw.elapsedmilliseconds < timeout && mycomport.bytestoread > 0)// && respond == false)// && rtbincoming.text.contains(">") || rtbincoming.text.contains("ok"))             {                 lblwhere.text += ".";                 system.threading.thread.sleep(1);  // sleep 1 millisecond             }              int elapsed = (int)sw.elapsedmilliseconds;             sw.stop();             return elapsed;         }

 this routine called via  value = waitfordata(10);

i hoping use value of elapsed value appears 0 time.

glenn

hi glenn,

i sorry mistakes , got startnew() new stopwatch().

yeap, stopwatch.startnew() same as:

stopwatch sw = new stopwatch();
sw.start();

but issue is, thread.sleep(1).

in default, stopwatch accurate to 1 milliseconds. so, 1 ignored. if tried thread.sleep(2) , print elapsedmilliseconds, shows 1. first milliseconds lost.

use frequency and ishighresolution fields determine precision , resolution of stopwatch timing implementation:

frequency: gets frequency of timer number of ticks per second.this field read-only.

ishighresolution: indicates whether timer based on high-resolution performance counter.this field read-only.

best regards

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neddy ren[msft]
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