Experimental Physics and
Industrial Control System

Eric Norum <[email protected]> · Mon, 26 Jul 2010 16:15:18 -0700

On Jul 26, 2010, at 4:00 PM, Angus Gratton wrote:
......
> Yes, I understand. I've been working from the well documented minimal
> example given in this presentation:
> 
> http://www.aps.anl.gov/epics/meetings/2009-07/talks/em_WritingEPICSDrivers.ppt

That's a good set of instructions.   
If you need asynchronous device support I would suggest that you look through the ASYN support module documentation.
In fact I'd go so far as to recommend ASYN for VME register-based synchronous access as well.  The 'devEpics' support provides a good way to decouple your I/O support from particular record types.  The synApps package contains the ASYN support module and lots of good drivers (e.g. ip330) for existing VME hardware.   One of these might be a good place to start modifying to match your hardware.

> 
> Outside of there, I've downloaded a few device support sources and
> looked at them but to be honest it's hard to tell what is legacy and
> what is a good example - lots of the sources haven't been touched in
> many years, some of them do things like combine device support & the
> driver into the same source, which I understand is no longer
> recommended. Which is why I thought I'd ask to be sure, because I'm not
> yet experienced enough to tell the difference between a good example and
> a bad one.
> 
> Regards,
> 
> Angus
> 

-- 
Eric Norum
[email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System