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Subject: Re: Writing PVs from an amalgamated structure
From: "Arnold, Ned D." <nda@anl.gov>
To: Iain Marcuson <Iain.Marcuson@sydorinstruments.com>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Mon, 9 Oct 2017 13:49:55 +0000


Hey Iain -


I would do this in the sequencer (SNL - State Notation Language). The sequencer will do all the connection handling to the PVs and you can include your own library (C/C++) for the file operations.  I think you'll find it a nice environment to work in on the IOC.


   Ned



From: tech-talk-bounces@aps.anl.gov <tech-talk-bounces@aps.anl.gov> on behalf of Iain Marcuson <Iain.Marcuson@sydorinstruments.com>
Sent: Monday, October 9, 2017 08:23 AM
To: Johnson, Andrew N.
Cc: EPICS Tech Talk
Subject: RE: Writing PVs from an amalgamated structure
 
I have attached a diagram of what we are planning at the moment.  The functions ReadConfigFile() and WriteConfigFile() would be called when the user requests a load or save.  The configuration data would be stored in one big structure.  GetData() returns a pointer to the structure, and is intended as the link between the PVs and the library.



> -----Original Message-----
> From: Johnson, Andrew N. [mailto:anj@aps.anl.gov]
> Sent: Saturday, October 07, 2017 6:59 AM
> To: Iain Marcuson <Iain.Marcuson@sydorinstruments.com>
> Cc: EPICS Tech Talk <tech-talk@aps.anl.gov>
> Subject: Re: Writing PVs from an amalgamated structure
>
> Hi Iian,
>
> I think we need to know quite a bit more about what you're trying to do, and
> where/when these configuration files will be read and/or written. The
> answers are likely to be very different depending on what you tell us, and I
> don't think anyone wants to spend time answering the wrong question.
>
> - Andrew
>
> --
> Sent from my iPad
>
> > On Oct 6, 2017, at 6:22 PM, Iain Marcuson
> <Iain.Marcuson@sydorinstruments.com> wrote:
> >
> > I need to create support for reading and writing a configuration file, but I
> also have to support non-EPICS environments.  I am thus considering making
> a library to be used in the IOC.  My present idea is to pass EPICS a pointer to a
> structure containing all the configuration options.  However, I do not know
> what best practices are for mapping PVs to the memory location.  What are
> the accepted methods?
> >
> > Thank you,
> >
> > Iain.
> >
> >

Replies:
Re: Writing PVs from an amalgamated structure Ralph Lange
References:
Writing PVs from an amalgamated structure Iain Marcuson
Re: Writing PVs from an amalgamated structure Johnson, Andrew N.
RE: Writing PVs from an amalgamated structure Iain Marcuson

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