Experimental Physics and
Industrial Control System

<[email protected]> · Fri, 30 Sep 2011 15:33:33 +0000

Hi

I've made a test connecting BOY to the pvAccess protocol, it's fairly straightforward. BOY uses the org.csstudio.utility.pv.IPVFactory and org.csstudio.utility.pv.PV interfaces, there are plugins for simulated values already in CSS. Some minimal example code is here:

http://epics-pvdata.hg.sourceforge.net/hgweb/epics-pvdata/pvAccessCSSTests

You make a PVFactory which registers a prefix like ipc:// and returns a PV when called with createPV(name). The PV object has an IValue getValue() method, return an IDoubleValue wrapping a double and some metadata. 

James

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Elliott Wolin
Sent: 30 September 2011 15:51
To: [email protected]; Kay-Uwe Kasemir
Cc: Hovanes Egiyan; David Lawrence; Vardan Gurjyan; carl Timmer
Subject: BOY widgets and protocols other than Channel Access

Hi,

I'm wondering how flexible BOY and its widgets are concerning 
interprocess communication (IPC) protocols other than Channel Access.

We likely will use BOY for all our EPICS interfaces, and are considering 
using it for our experiment control interfaces as well  (i.e. for our 
"ECS", following LHC nomenclature).   Our experiment control and DAQ 
systems use IPC protocols other than CA, including some home-grown ones 
(e.g. the cMsg publish/subscribe package). 

Can BOY accept IPC plugins?  Is CA implemented as a plugin or something 
analogous?  Does BOY use a generic interface to connect to IPC packages 
that we can implement ourselves using our other IPC packages?  Or is CA 
hard-wired in and difficult to disentangle from the core BOY code?

Any information and especially suggestions on how to proceed will be 
appreciated.

Thanks,

-- 

				Sincerely,
					Elliott

================================================================================

 Those raised in a morally relative or neutral environment will hold
		    no truths to be self-evident.

Elliott Wolin
Staff Physicist, Jefferson Lab
12000 Jefferson Ave
Suite 8 MS 12A1
Newport News, VA 23606
757-269-7365

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System