Experimental Physics and
Industrial Control System

Michael Abbott <[email protected]> · Mon, 16 Mar 2009 08:38:35 +0000 (GMT)

On Mon, 16 Mar 2009, Gasper Jansa wrote:
> You can use extended device support to support changes to INP/OUT fields 
> in runtime. See chapter 12.5 of Application developer's guide.

Thanks, wasn't aware of this.  Look like that support was added to 3.14.8 
(which happens to be the version we've been using for ages...)

Took a little reading to make sense, think I understand it now: is the 
idea that every time a write to INP occurs my record will first receive a 
del_record() callback follwed by an add_record() callback?

Do I have any idea about the new INP and DTYP values at the time 
del_record() is called, or do I have to assume that I'm going to have to 
completely detach the record?  I guess the model is that writing to 
DTYP/INP are complete changes of record context -- I guess I can work with 
that.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System