[libdc] Follow-up on DFW-X710 lock-up

[David J. S. <dj...@co...>]

RE the Sony DFW-X710 which locks up when I change the "shutter speed"
setting, and requires a power cycle to re-enable it:

Thanks for the tips. I investigated further and think i have a handle on
the problem now.

1) Two (out of five) of the cameras are an older model "DFW-X710 v1.02A"
rather than "DFW-X710 v1.11A" and only those two cameras are vulnerable
to the problem. This explains why I was never able to reproduce the
problem on my test bench.

2) I was unable to cause the symptom with a simple test program, and it
occurred to me what was happening: the test program was straight C,
whereas the real application is multi-threaded Java. Fetching images and
changing settings are handled by two different threads. The camera was
being hit with two commands at once and could not cope.

I have done some work on thread synchronization and I think the problem
has been eliminated.

Cheers,
-  
=======================================================================
You can't possibly be a scientist if you mind people
thinking that you're a fool. - Wonko the Sane
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                               David J. Schuller
                               modern man in a post-modern world
                               MacCHESS, Cornell University
                               sch...@co...