RE: Waveform record missing fields

["Allison, Stephanie" <saa@slac.stanford.edu>]

Hi Mark,

> NUSE: The number of elements in the waveform to actually use.  Must be <=NELM.

I think you intend this record to be something you can caput?  If yes, maybe better to call it something other than NUSE since NUSE for a compressRecord is not modifiable (NUSE for a compress is the same concept as NORD for a waveform).  Maybe "NINP" instead.

> Also, the record does not post monitors on the BUSY or NORD fields.  Should this be the
> responsibility of device support, or does that code belong in the record?

I think the code belongs in the record.  It would be very nice to have monitors on NORD!

Thank you!

Stephanie Allison

> -----Original Message-----
> From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf
> Of Mark Rivers
> Sent: Friday, February 10, 2012 10:50 AM
> To: tech-talk@aps.anl.gov
> Subject: Waveform record missing fields
> 
> Folks,
> 
> All versions of the EPICS Record Reference Manual from 3.13 to 3.14.12.2 document the
> following 2 fields in the waveform record:
> 
> RATE Sampling Rate       Some device support modules may find this useful.
> PTSS Pre-trigger Samples Some device support modules may find this useful.
> 
> I really need to use these 2 fields in some new asyn device support I am writing.  (This
> device support will allow me to remove the dependence of areaDetector on mca).
> 
> But these fields do not actually exist in the waveform record, at least for any version of base
> from 3.14.8.2 to 3.14.12.2!
> 
> I cannot find anything in the 3.13 or 3.14 release notes that mentions removing these fields.
> 
> Questions:
> 
> - Did these fields ever exist?
> 
> - Should they be added?
> 
> - If so, then while we are adding these fields are there others we should also add that would
> not break backward compatibility?
> 
> Here are is one that I can think of:
> 
> NUSE: The number of elements in the waveform to actually use.  Must be <=NELM.
> 
> Also, the record does not post monitors on the BUSY or NORD fields.  Should this be the
> responsibility of device support, or does that code belong in the record?
> 
> Thanks,
> Mark
> 
> 
>