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from Marty: USB volume triggers bug fix
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I noticed a stray "clear all" in config_triggers.m

That's OK if you run config_triggers from the MATLAB command line
before starting your script; it's also OK if config_triggers is the
first command in a Cogent script.

However, the "clear all" will break things if you call config_triggers
in the middle of a Cogent program (as was suggested in the NOTES :-/ ):

     ...
     start_cogent;
     tdevnum = config_triggers;
     ...
     [setup your wait screen]
     ...
     wait_for_trigger(5,tdevnum);
     [expt stimulus code starts now]
     ...

I removed "clear all" from the example code on the new Cogent PC:

    C:\Expts\#HOWTO-Acces-TTL-USB-box\config_triggers.m

If your USB triggers are working, don't do anything.

If you were having a problem, copy the new config_triggers.m file above
into your MATLAB directory (or comment out the "clear all" line in your
current copy of config_triggers.m).

Sorry for not spotting this earlier.

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