Experimental Physics and
Industrial Control System

"Mark Rivers" <[email protected]> · Mon, 12 Apr 2010 07:25:08 -0500

Section 7.4 of the App Developers Guide lists the sequence in which things happen when iocInit is called.  initialProcess happens after both calls to init() in device support.

When are you doing initialization?

You could do a test by removing PINI=1 but then adding a 
dbpf "rec.PROC","1" 
right after iocInit() and see if that works.

Mark

________________________________

From: John Dobbins [mailto:[email protected]]
Sent: Mon 4/12/2010 7:09 AM
To: Mark Rivers
Cc: EPICS Tech-Talk
Subject: Re: device support PINI problem

Mark,

This is certainly possible but the App Developers Guide doesn't say anything about when initialProcess() happens so I'm not sure.

John

Mark Rivers wrote:
> Is there some initialization of your Opto22 device support that might not have happened yet when records with PINI=1 process?  How and when does any initialization occur?
> 
> Mark
> 
>
> ________________________________
>
> From: [email protected] on behalf of John Dobbins
> Sent: Sun 4/11/2010 7:06 PM
> To: EPICS Tech-Talk
> Subject: device support PINI problem
>
>
>
> All,
>
> I have a puzzle that I'm not sure where to begin with. I've written
> device support for Opto22 remote I/O based on Opto22 provided libraries.
> I have been using it for a few years without trouble until the other day
> I set PINI = 1 on an output record. It turns out I haven't needed to do
> this  before. The the record got stuck in a funny state with UDF = 1, if
> I subsequently write to the record the new value appears there but not
> in hardware. Also, these output records do a read from remote hardware
> during record init so I'm surprised that I should have a problem later,
> i.e. during initialProcess(). If PINI is not set I can write to the
> record and hardware without problem. Any ideas where to begin?
>
> Thanks,
>
> John Dobbins
> Cornell Laboratory for Accelerator-based Science and Education
>
>
>

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System