Re: asynInt32 device support for mbbiDirect record for representing bitmasks

[Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>]

On Mon, 2 Feb 2026 at 16:29, Wlodek, Jakub via Tech-talk <tech-talk at aps.anl.gov> wrote:

As an aside, it would be nice if I could also give names to each of the bits in an mbbiDirect/mbboDirect, like with mbbo/mbbi record values. This would be helpful for creating UIs and other client programs. From the record reference manual, I don't see any fields that would allow for this, is that correct?

The usual setup will have a bi record for each bit, with an appropriate name, description, string values and alarm severities for each state, and its input set to "status_word,Bxx CP MS".

That makes sure each single bit is only processed when its value changes.

The mbb[io]Direct record are bitset records for command words and status words, and as such, their description, status, severity, ... refer to the bitset, not single bits.

Cheers,
~Ralph