Re: pvget to an _output_ record

[hill@luke.atdiv.lanl.gov (Jeff Hill)]

> 
> It turns out that we have a situation where a pvget directed to
> an ouptput record needs to do some processing (read the actual
> device) rather than simply return the restored value.
> 

Perhaps you will want to implement an AI device interface for your 
AO device (in addition to the normal AO device interface).

> 
> I see that the record structures include entries for things like:
>     long            rbv;            /* Readback Value */
>     long            orbv;           /* Prev Readback Value */
>     etc
>     
> but it's not clear how these values get set and who uses them.  Or even if
> they are applicable to the problem.
> 

This is used to restore the database value for AO devices from the 
hardware during iocInit.

Jeff

______________________________________________________________________
Jeffrey O. Hill			Internet	johill@lanl.gov
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