Re: FW: EPICS driver for SIS3302

[Till Straumann <strauman@slac.stanford.edu>]

On 06/16/2011 12:20 PM, Andrew Johnson wrote:
> There is obviously a need for a VME DMA API in devLib.  APS has been using one
> I designed here for many years, and there are tech-talk messages archiving my
> implementations of this for vxWorks for all 3 of the VME interface chips we
> use here (VMEChip2, Universe-2, Tempe).  Recently Mark Rivers started using it
> for some of his code and now Diamond have looked at it.  I believe that Till
> has a slightly different API for RTEMS with implementations for the Universe-2
> and Tempe chips, and PSI also wrote their own but I don't know what chips or
> OSs that runs on.

The one I have for RTEMS is actually an adapter layer that implements
your API (the one that comes in 'gtr'). IIRC there are some enhancements
but the basic functionality is fully compatible with your stuff.

Under the hood we can use universe or Tsi148 but that is mostly 
transparent to the user.

T.


> I've already suggested that Michael Davidsaver add a pluggable DMA API to
> devLib so we can stop reinventing this particular wheel, but I know he's busy
> with work on NSLS-II so he might appreciate some help.  If anyone discusses
> this topic in the future, /please/ use tech-talk (or core-talk) so others can
> also join in.
>
> - Andrew
>
>
> On 2011-06-16 Ernest Williams wrote:
> > From: Williams Jr., Ernest L.
> > Sent: Wednesday, June 15, 2011 10:39 PM
> > To: Korhonen Timo; Keahey, Pelham; Hu, Yong
> > Cc: Szalata, Zenon M.; Straumann, Till; Kim, Kukhee; anj@slac.stanford.edu;
> >   Allison, Stephanie; mdavidsaver@bnl.gov; Williams Jr., Ernest L. Subject:
> >   RE: FW: EPICS driver for SIS3302
> >
> > Hi,
> >
> > This sounds like a great codeathon topic.
> >
> > Till are you interested in this as well?
> >
> > Can we get this kind of thing in devLib2 -->  libCom ?
> > Michael, what do you think?
> >
> >
> >
> > Cheers,
> > Ernest
> > ________________________________________
> > From: Korhonen Timo [timo.korhonen@psi.ch]
> > Sent: Wednesday, June 15, 2011 9:47 PM
> > To: Keahey, Pelham; Williams Jr., Ernest L.; Hu, Yong
> > Cc: Szalata, Zenon M.
> > Subject: RE: FW: EPICS driver for SIS3302
> >
> > Hi all,
> >
> > sorry for the late reply.
> > The complicated part of our driver is that we make heavy use of DMA, and
> > we have some libraries that are on top of the vxWorks BSPs. So it
> >   unfortunately will need some work to get it to run on RTEMS; libCom did
> >   not have this support (as far as I remember). It should, though - but this
> >   is another issue.
> >
> > In any case we would be happy to share the driver. To understand it
> >   somebody needs to look at the vxWorks dependent part, to be able to
> >   replicate the API functions in RTEMS.
> >
> > best regards,
> >
> > Timo