Re: Transfering array of 256 elements to driver

[Mark Rivers <rivers@cars.uchicago.edu>]

You have a typo in your DTYP.

Sent from my iPhone

> On May 31, 2018, at 8:28 AM, Jörn Dreyer <j.dreyer@hzdr.de> wrote:
> 
> Hi Mark and Michael,
> 
> her is how I configured the waveform record:
> 
> record(waveform, $(P)$(R)$(I):DelayTimeA) {
>   field (DESC,    "Delay of channel A")
>   field (DTYP,    "asnyInt32ArrayOut")
>   field (OUT,        "@asyn($(PORT), 0, 100) DELAYTIMEA")
>   field (FTVL,    "LONG")
>   field (NELM,    "256")
> }
> 
> At IOC startup I get the following error message:
> 
>> Can't set "XXX:Test1:DelayTimeA.DTYP" to "asnyInt32ArrayOut"
>> Error at or before ")" in file "db/Delay.db" line 355
>> Record "XXX:Test1:DelayTimeA" does not have a field "OUT"
> 
> This somehow contradicts the information. And the record reference manual 
> defines also onle the INP field for the waveform record.
> 
> Regards,
> 
> Jörn
> 
> Am Donnerstag, 31. Mai 2018, 15:01:35 CEST schrieb Mark Rivers:
>> Hi Jörn
>> 
>>> The waveform record supports only INP direction.
>> 
>> The devAsynInt32Array.dbd file defines both input and output.
>> 
>> 
>> corvette:asyn/asyn/devEpics>more devAsynInt32Array.dbd
>> device(waveform,INST_IO,asynInt32ArrayWfIn,"asynInt32ArrayIn")
>> device(waveform,INST_IO,asynInt32ArrayWfOut,"asynInt32ArrayOut")
>> 
>> Your waveform record would use DTYP="asynInt32ArrayOut".
>> 
>> 
>> Mark
>> 
>> 
>> 
>> ________________________________
>> From: tech-talk-bounces@aps.anl.gov <tech-talk-bounces@aps.anl.gov> on
>> behalf of michael.abbott@diamond.ac.uk <michael.abbott@diamond.ac.uk> Sent:
>> Thursday, May 31, 2018 7:54 AM
>> To: 'Jörn Dreyer'; tech-talk@aps.anl.gov
>> Subject: RE: Transfering array of 256 elements to driver
>> 
>> From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov]
>> 
>>> I'm working on a driver that needs to set 256 values into one hardware
>>> register. What type of database record should I use for this purpose?
>>> 
>>> The waveform record supports only INP direction.
>> 
>> In fact this is not so: you can write in either direction when processing
>> the record, it's up to the device driver to decide whether to push or pull
>> waveform data, so the waveform record will be what you need.
>> 
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> 
> 
> -- 
> Dr. Joern Dreyer
> HIBEF DAQ + Controls
> Institut für Strahlenphysik
> Helmholtz-Zentrum Dresden - Rossendorf e.V
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