VISA wave GUI crashes after a while

Hey everybody,

SUMMARY:


I'm working on a project through my University that has the reading data from a disk USB eZ430.  The eZ430 is connected to a (a Board using a MSP430) wireless receiver that receives data from a remote sensing node (also a Board MSP430) based.

We have developed a .vi displaying our data on two charts of waveform - one for data of temperature and moisture collects data we are from the remote sensing node.

The GUI works fine for a random time then it will interfere.  This hook may occur a few minutes or even a few seconds of operation the .vi

Sometimes the hangup returns an error and sometimes LabVIEW goes into (no response).  I'm currently trying to reproduce the error popup so I can provide the error code - I'll add to this post as soon as it arrives.

DETAILS:

Our transmitter sends our data in a package that contains a numeric value and a header - either A or B.  A process our temperature value while B is the header of our value of moisture.  The string is then terminated by '\r\n '.  The range of numeric values between 0 and 4 096.  A series of packets in hyperterminal would be as follows:

A1034

B901

A1040

B895

...

We assume that the number of bytes is 7 - (A one) + (an each number) x (4 issues) + (1 per \n) + (1 per \r)

The .vi tries to pull the A or B of the string using a string splitting function and inputs then the letter A or B in a housing structure.  This case structure decides what inputs are based on the input byte A or B that is extracted from the string.  The numeric value that is passed into the structure of the case came out to our table of waveform accordingly in case whatever is determined.

It was also necessary to include a third case, case C to be committed of a broken by default to prevent any reads null of being mixed with our actual data.

WHAT WE TRIED:

So far, we have tried several things:

We have included/enabled to check the stop ('\n' = 0x0A) character in the block of visa Installer.  We also tried assigning this character ('\r' = 0x0D).  With no luck, we tried the other obvious option to let the disabled stop character...  In each case, we re programmed our show node to have ONLY the tank of respective termination (or none) and adjusted our number of bytes.

I understand that our case may be situational and difficult to debug without our actual transmission and reception of the nodes, but I was wondering if there may be something obvious jump in the eyes more qualified.

All advice is appreciated!

Hmm... .

Why are you closing your reference CITATION after every read?

You have to keep it open until you are finished with it and then close it.

In addition, you have controls and indicators which do not have labels.  This could cause trouble LabVIEW but I'm not sure.

Your loop runs also without waiting if you have problems using CPU.  Read VISA can provide a delay time for you well.

Tags: NI Software

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