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<== Date ==> <== Thread ==>

Subject: RE: how to know which PVs write to a PV
From: <michael.abbott@diamond.ac.uk>
To: <leige@ihep.ac.cn>, <tech-talk@aps.anl.gov>
Date: Wed, 21 May 2014 09:09:32 +0000
From: LEI Ge [mailto:leige@ihep.ac.cn]
> This week we met a problem, a PV's value should be 1 (to enable our e-
> gun trigger), but sometimes it becomes 0 unexpectedly. I checked the
> software logic I can remember to this pv, and have not found the
> reason. Maybe there is some logic I forget or I don't know, to write to
> this pv. So is there a way to check in our control system, which PVs
> write to this pv? Or, this PV is written from which IP?

EPICS provides a hook, asTrapWriteRegisterListener, which is called on every CA put.  I've attached a small support module that I've written to use this to write a log message every time a CA put occurs.



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Attachment: pvlogging.tgz
Description: pvlogging.tgz


References:
how to know which PVs write to a PV LEI Ge

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