Experimental Physics and
Industrial Control System

Tim Mooney <[email protected]> · Fri, 26 Feb 1999 13:05:43 -0600 (CST)

re...

> I am creating a custom record, and have defined a field in the record to
> have special processing at run time (special = SPC_MOD) and have the pp_value
> set to YES (a passive record should be processed when Channel Access writes
> to this field).
>....  Sometimes I
> see that special is called and then some time later - much later -
> the process gets called by "scanOnce".
>...
> So, sequence of events is:
> 
> -start watchdog timer at time <72103>
> -value written to SPC_MOD field <73003> in an interrupt routine from a different
> record.

You don't want to do this.  If you call dbPutField (for a process-passive field)
from an interrupt routine, the record will get processed at interrupt level.
You shouldn't do anything at interrupt level that you can avoid doing there.

Tim Mooney ([email protected]) (630)252-5417
Beamline Controls & Data Acquisition Group
Advanced Photon Source, Argonne National Lab

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System