Re: EPICS waveform output record

[Carl Lionberger <CALionberger@lbl.gov>]

Because database puts write the new data into the waveform buffer before 
the device support read_wf function is called when the record 
subsequently processes(by process passive), you can just have the 
read_wf write to the hardware.

Carl

Steven Hartman wrote:

> I am writing support for an arbitrary waveform generator (Joerger Model
> VDACM 8 channel, 16-bit, 100kHz, waveform generator with 32k memory per
> channel).
>
> Is there an EPICS record which is appropriate for such a device? The aao
> record seems like a possibility, but a search of tech-talk archives from
> 1996 and 2000 revealed a number of problems with this record which don't
> appear to have been incorporated into later releases (looking at
> aaoRecord.c from R3.13.10).
>
> The waveformRecord is close, but is designed for readback, not output like
> I need for this device. The gensub record may be a way to deal with it, if
> necessary.
>
> Is anyone using a similar device, and if so, what record are you using?
> Also, any suggestions on user interface for loading and modifying
> waveforms?
>
> Thanks,
>  

--
Carl Lionberger
Control System Software Engineer
Berkeley National Laboratory (LBNL)
(510)486 7503