Experimental Physics and
Industrial Control System

Michael Davidsaver <[email protected]> · Fri, 26 Jun 2015 11:24:27 -0400

On 06/26/2015 10:42 AM, Florian Feldbauer wrote:
> Hey Michael,
> 
> thanks for the quick answer.
> Looking at your code, I'm doing in principal the same.
> Instead of having a special flag I'm setting PACT = true
> as Ralph suggested.
> 
> But even when I use your method with the sync flag
> I have the same problem:
> The device supports updates RVAL of the bo,
> but VAL is not changed.
> Do I have to set VAL explicitly from device support in this case?

Yes.

The logic in the process() function of boRecord assumes that VAL updated
before processing begins (as is typical of output recordtypes) and
updates RVAL from VAL before calling into device support.

Since you are doing something different you'll need to set VAL yourself.

https://github.com/epics-base/epics-base/blob/3.16/src/std/rec/boRecord.c#L224

In my example I do this for aoRecord

https://github.com/mdavidsaver/pscdrv/blob/master/coreApp/src/devPSCSingle.cpp#L194

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System