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<== Date ==> <== Thread ==>

Subject: RE: AreaDetector bindings and RBV propagation
From: Iain Marcuson <Iain.Marcuson@sydorinstruments.com>
To: "Mark S. Engbretson" <Engbretson@anl.gov>, "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Mon, 8 May 2017 20:53:12 +0000
I checked and I do have a callParamCallbacks(addr) call at the end of the function.

Iain.

> -----Original Message-----
> From: Mark S. Engbretson [mailto:Engbretson@anl.gov]
> Sent: Monday, May 08, 2017 4:51 PM
> To: Iain Marcuson <Iain.Marcuson@sydorinstruments.com>; tech-
> talk@aps.anl.gov
> Subject: RE: AreaDetector bindings and RBV propagation
> 
> You might be missing the
> 
> callParamCallbacks();
> 
> any time that you perform a set command.
> 
> -----Original Message-----
> From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-
> bounces@aps.anl.gov]
> On Behalf Of Iain Marcuson
> Sent: Monday, May 08, 2017 3:29 PM
> To: tech-talk@aps.anl.gov >> EPICS Tech Talk <tech-talk@aps.anl.gov>
> Subject: AreaDetector bindings and RBV propagation
> 
> I have completed a basic AreaDetector module for my camera and am
> working on adding enhancements.  Presently, I am attempting to add
> readback of acquisition status.  I am unfamiliar with the normal operations of
> the RBV PVs, but tried manipulating one for practice.  The sequence of
> events is:
> 1. Start IOC.
> 2. Caget $(P)$(R)DetectorState_RBV.  It is idle.
> 3. Run acquisition command.
> 4. Caget $(P)$(R)DetectorState_RBV.  It is idle.
> 5. Caput $(P)$(R)GetStatus  1.  PV and function are detailed below.
> Initially reported value is 0, as expected.
> 6. Caget $(P)$(R)DetectorState_RBV.  It is "Correct" (numeric value 3, as
> expected from GetStatus code).
> 7. Caput $(P)$(R)DetectorState_RBV 2.
> 8. Caget $(P)$(R)DetectorState_RBV.  It is "Readout" (as expected from
> ADBase.template, numeric value 2).
> 9. Caput $(P)$(R)GetStatus 1.  Initially reported value is 3, not 2 as would be
> expected from step 8.
> 10. Caget $(P)$(R)DetectorState_RBV.  It is "Readout" (numeric value 2), not
> 3 as would be expected from step 9.
> 
> The Get Status code is
> 
> if (function == detector_get_status_)
>     {
>       printf("Received SDGetStaus command.\n");
>       // XXX Does putting a Get make the set take effect?
>       getIntegerParam(ADStatus, &det_status);
>       printf("Detector status before set is %i.\n", det_status);
>       setIntegerParam(ADStatus, 3);
>     }
> 
> And the GetStatus record is:
> record(longout, $(P)$(R)GetStatus)
> {
> 	field(DTYP, "asynInt32")
> 	field(OUT, "@asyn($(PORT),$(ADDR),$(TIMEOUT))SDGETSTATUS")
> }
> 
> Why are the values not propagating between parameter library and PVs, and
> how does one update these readback value PVs?
> 
> Thank you,
> 
> Iain Marcuson.


References:
AreaDetector bindings and RBV propagation Iain Marcuson
RE: AreaDetector bindings and RBV propagation Mark S. Engbretson

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