Experimental Physics and
Industrial Control System

Heinrich du Toit <[email protected]> · Wed, 14 Nov 2007 08:26:23 +0200

There are atleast 3+ libraries out there.
There are a multi-threaded one from KEK. (import ca)
it works but docs are a bit sketchy - I have some notes somewhere.
Then there is another non-threaded one. from FNAL I think.
Good docs on this one. Don't think it's multi-threaded though.
I think that's the two on the EPICs web-site (look under extensions)
Then there is one from Newville (import epicsca)
nice documentation. non-multithreaded.
http://cars9.uchicago.edu/~newville/Epics/Python/

I have a library that runs python inside the IOC (embedded)
it includes CA capability also.
Is in Beta stages. (will move CA part out to seperate library some time)
Is kind off specialized. I think one of the above ones will work for you.
And I'm sure there's more out there.
I guess making a python library is not all that difficult.

Emmanuel Mayssat wrote:

Does anyone of you have a channel access library for python?
--
Emmanuel

On Wed, 2007-09-12 at 09:23 +0900, Noboru Yamamoto wrote:

Hi, Hinrichi:
Very interesting.
Actually, I have experimented similar approach called devPy.
You can use Python to interface your device to EPICS.
It does not uses ASYN and just have AI/AO and WF device support
routines.ãAnd I found it is still usefull.
I will definitely look at your code.
Regards,
Noboru
Heinrich du Toit wrote:

Hi there
I've started a project that allows me to run an embedded python script
inside an IOC using an ASYN driver.
This allows you to setup (standard) records that using ASYN will call
python functions (inside classes) directly.
It's a multi-threaded environment.
You can use any channel access library available for python.
It's already in working version - but is still alpha - ie. it needs
work.
If your interested download svn source:

svn co
http://epicstlabs.svn.sourceforge.net/svnroot/epicstlabs/pythonioc

pythonioc

(in one line!)
If you want to help develop - just sent me an email with your
sourceforge username.
If your not interested - well delete this email :P
cherios
-Heinrich

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System