Experimental Physics and
Industrial Control System

Noboru Yamamoto <[email protected]> · Mon, 03 Sep 2001 15:14:47 +0900

Hi,

Jeff Hill wrote:
> 
> Rolph,
> 
> > What solutions are currently used in the community for image capture. We
> > want to look at beam spots on scintillators with a camera and integrate
> > capture and maybe processing into the control system.
> 
> On a related note, I have finished a CA protocol upgrade that includes
> a configurable maximum array size limit. This will show up in the next
> R3.14 release.
> 
> Jeff
>

When you consider to extend CA libarary to support large array, please also
consider to add API/protocol to access subarray with offset.

As far as I understand, EPICS CA/DB library allow to access a part of
array if it starts
from the top of array, ie. a[:n] in Python notation.. In Db library, we
needed to implement 
API to access array data with offset, i.e. a[n:n+m] in Python notation
again, for effcient use
of memory in a subarray record.   I believe this kind of access method
is useful for many applications and it will not so difficult and will
not break any existing application. 

I would greatly appriciate if you could consider this possibility.

Thank you,

Noboru Yamamoto
KEKB control group
KEK, JAPAN

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System