Extra FF character in serial communication

[manmar]

Hi,

After upgrading the LabView 8.6  to LabView 2010 the following problem appeared:

The correct response to a read command is: A5FF 0201 0001 32FF 0000 0000.

But now with LabView 2010  extra FF characters are addded: A5FF FF0201 0001 32FF FF00

What is happening. Can you help me with this problem ?

Thanks,

Manuel

[Albert.Geven]

please send the offending vi. I don't see a difference without it.

Maybe you have integers of the wrong data type

[manmar]

This is the vi

[manmar]

More information:

Linux Fedora 9

And the Visa configuration vi

[Albert.Geven]

don't see anything disturbing so I guess that something else has been changed too.

Probably the lower level visa driver?

[manmar]

I install LabView 2011 in another computer and the result in the same.

If I add a delay of at least 30 ms between writing and reading works fine.

[manmar]

A typo error, is 2010 Not 2011

[Albert.Geven]

I guess that it is te underlying serial driver in linux that has difficulties, in principle your program is not to blame

[smercurio_fc]

Have you tried slowing down the communication? You may have an "iffy" cable, or noise being injected into the cable. Does the same thing happen if you use, say, a simple serial communications program?

[manmar]

After LabVIEW updates and the problem started I place a spy hanging on the line of communication and the data are good, no noise.

I test with simple serial communication between two computers. If the data has more than 10 characters and at least one FF. When reading adds an extra FF.