Virtual COM port crashes labVIEW

[muks]

I am using virtual comport for one of my application and sometimes due to time out or lack of processing data my labVIEW hangs and i am not able to stop it properly and the only solution is I un plug the USB cable and which results in a labVIEW crash. Any suggestion to avaiod the crash?

[Pnt]

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muks wrote:
due to time out .....

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If a time out occurs trere are no data, so it should not crash Labview.

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muks wrote:
 lack of processing data

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What does it mean? Do you have many bytes of data stored at the Visa buffer, without reading them? That could crash Labview.

Just set a bigger buffer, or better, read the data faster.

[muks]

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muks wrote:
due to time out .....

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If a time out occurs trere are no data, so it should not crash Labview.

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Time out doesnt crash labVIEW.It hangs it .Once i get the time out error i am not able to stop the vi.

[muks]

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muks wrote:
 lack of processing data

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What does it mean? Do you have many bytes of data stored at the Visa buffer, without reading them? That could crash Labview.

Just set a bigger buffer, or better, read the data faster.

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I have lot of image processing function which i use after getting the data from the serial port. Once i unplug the cable (Which i shouldnt normally).LabVIEW crashes

[Ray.R]

If you are processing lots of data through the COM port, you should use a producer consumer loop arrangement in order to read the port consistently.

How are you doing your port read?  What else are you doing (at the same time)?  Are you using an architecture which uses the loop efficiently?  Not just spinning the loop while waiting for data...

Something in the code may be causing LV to crash....

Maybe if you posted your code we could have a look at it. 

R

Message Edited by JoeLabView on 07-29-2008 09:48 AM

[muks]

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How are you doing your port read?  What else are you doing (at the same time)?  Are you using an architecture which uses the loop efficiently?  Not just spinning the loop while waiting for data...

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Well i have got  an idea thanx joe will try and let you know

[muks · Accepted solution]

Well sorted the problem and the problem was due to processing junk data and i am performing fft and so it hangs if i dont get a proper data.Nothing to do with lv.Thanx for the replies

[Ray.R]

Glad you found it.  🙂

I would have been very surprised that something related to serial communication would cause LV to crash.. 😉

R