RE: How to get a list of all available PVs

[<ronaldo.mercado@diamond.ac.uk>]

Hi Carlos,

 

Adding to Pavel’s all good suggestions, there is no “native” directory in base epics that lists the PVs available on a network.

 

Ralph Lange’s channel finder is an alternative that some sites may be using.

 

http://sourceforge.net/projects/channelfinder/

 

Ronaldo

 

From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Pavel Maslov
Sent: 17 December 2012 08:50
To: Carlos Pascual
Cc: EPICS Tech Talk
Subject: Re: How to get a list of all available PVs

 

Hi Carlos, 

 

on the IOC side issue dbl (in the epics shell):

 

epics> dbl

And you'll get all the PVs loaded in to EPICS database.

 

If you want to get a list of PVs on the client side though, then I don't think that can be implemented as easily as I have descibed above.

You can always ssh to the IOC box and either execute st.cmd and use the dbl command, or use procServ to connect to a running IOC. In this case, I suspect the st.cmd file should contain dbl after the iocInit command. As for the latter, I have never used procServ myself. So just guessing.

 

On Mon, Dec 17, 2012 at 12:38 PM, Carlos Pascual <cpascual@cells.es> wrote:

Hi,

Sorry for this newbie question... I come from the Tango community, and I am
quite lost with Epics

I am a developer of Taurus [1], a GUI library initially designed to provide
PyQT GUIs on top of Tango. But our goal is to also support other
communication/control systems such as Epics.

I recently implemented some very basic support for epics in Taurus (just a
proof of concept) using PyEpics, and one of the first questions that I came
across is:

How can I obtain a list of all PVs that are available?

... or even better, can I get a list of all PVs whose name contains a certain
prefix?

The reason I want this is that I want to create a browser/selector of PVs. I
do not care that much if the method is slow (I could live with doing it once
and only manually refreshing the list).
But I need the method to be generic, i.e. it should not assume some non-
standard service (such a site-dependent database) to be available.

Is this possible at all?

Cheers,

[1] http://www.tango-controls.org/static/taurus/latest/doc/html/

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+----------------------------------------------------+
 Carlos Pascual Izarra
 Scientific Software Coordinator
 Computing Division
 Cells / Alba Synchrotron  [http:/www.cells.es]
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--
Best regards,


Pavel Maslov, MS
Controls Engineer at Pulsed power Lab
Efremov Institute for Electro-Physical Apparatus
St. Petersburg, Russia

Mobile: +7 (951) 672 22 19
Landline: +7 (812) 461 01 01

 

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