Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov> · Sat, 22 Jul 2023 09:13:23 -0700

On 7/21/23 00:42, Gabriel Fedel via Tech-talk wrote:

Hi Tech-Talk,

I'm playing a bit with the NTEnum (https://docs.epics-controls.org/en/latest/specs/Normative-Types-Specification.html#ntenum), and I'm wondering if would be possible to use a string as the input so I would get its index.

Something like:

pvput PVEnum "ABC"

This is what should happen now.

NTEnum is a bit awkward as it requires that clients be aware of
value.index and value.choices.  In the specific case of pvput
the code involved is here.

https://github.com/epics-base/pvAccessCPP/blob/581d100a029e6f68f3c1830b90509b3ee5ebd7a0/pvtoolsSrc/pvput.cpp#L180-L202

Note that this code is triggered when field being written is a
sub-structure with ID "enum_t".  So it isn't limited to NTEnum.

pvget PVEnum
return : 5

"pvget PVEnum value.index" would print the numeric index.

I'm using this db as a start point: https://github.com/epics-base/pva2pva/blob/master/iocBoot/iocimagedemo/ntenum.db

Thanks in advance
Cheers

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System