Re: write to a single element of an array field

[Ben Franksen via Tech-talk <tech-talk at aps.anl.gov>]

Hi Ralph

thanks for your reply.

Am 06.03.20 um 09:26 schrieb Ralph Lange via Tech-talk:
> On Thu, 5 Mar 2020 at 19:42, Benjamin Franksen via Tech-talk <
> tech-talk at aps.anl.gov> wrote:
> 
>> Is there an EPICS version where I can write (via link, DB or CA) a
>> scalar to one specific element (i.e. index) of an array field? I am not
>> as up to date on EPICS development as I used to be, so perhaps this has
>> been added and I missed it, perhaps in 7.x (hope dies last...).
> 
> Filters on write (that would be the obvious way to do it) have not been
> implemented yet.
> Dirk Zimoch added filters for DB links at the last Codeathon, but - as with
> CA - these are only working for get and monitor; there's nothing (yet) for
> the write operations.

Interesting. Could you point me to some place where I can read about
these developments? It sounds like some progress has indeed been made.
So with Dirk's additions I can now read a single element from an array
via DB link?

BTW, I am a bit confused by your terminology, i.e. don't quite get how
this is a "filter". ATM my best guess is that this is because it was
discovered that the same mechanism that was originally designed to allow
filtering of events turned out to be more general and allow things like
re-targeting of links?

> Pull Requests / Merge Proposals are always welcome!

Where does this link filtering code live? (I mean which file or
directory in base.)

Cheers
Ben

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