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Re2: vrf Filter/intercept GPIB commands

Question asked by VRFuser on Nov 30, 2007
Stan Bischof (Richard S) <rsb@soco.agilent.com> wrote:
> "Robert Hemp" <rhemp@rim.com> wrote:
> > Hi All,
> >
> >
>
> >
> > The other way would interface / wrap around the VISA COM in some way
> > and filters directly whats send to the VISA interface.
> >
> > 
> >
> > Can one these solutions work and has anybody tried this before?
> >
>
> I did something similar to that a ways back with SICL, so I'd expect
> that something similar could be done with VISA.
>
> Ended up creating library that duplicated the SICL commands and looked
> externally like SICL. It internally did SICL calls to the "real" SICL
> library.
>
> I would think that you could write a VISA lookalike and have it call
> the "real" VISA.
>
> Woudln't it maybe be easier to get the vendor to fix their code?

ONE THING TO WATCH OUT FOR---

This approach will fail miserably unless the vendor's software talks through your VISA library. There's plenty of ways to talk GPIB without VISA so unless you are sure that the target code talks through a VISA library that you can hijack, this won't work.

regards

Stan


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Stan Bischof  Agilent Technologies  707-577-3994  stan_bischof@agilent.com
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