[time-nuts] OT: Test for NI IEEE-488 interface
Didier Juges
didier at cox.net
Sat Oct 6 14:13:56 UTC 2007
Ulrich,
I do not have a plug-in NI card (I do have a USB type controller from NI
though) so I am not sure what I am going to say will work, but it's worth a
try.
I believe the IEEE-488 controller has its own address (that is not often
used, but the IEEE-488 spec requires that), so you should be able to address
it and get its name. You should also be able to set its time-out and ask it
to query a non-existant instrument and get the time out error from the
controller card, which I believe is different from the time-out from the DLL
(which you would obtain if there were no controller card).
Didier KO4BB
> -----Original Message-----
> From: time-nuts-bounces at febo.com
> [mailto:time-nuts-bounces at febo.com] On Behalf Of Ulrich Bangert
> Sent: Saturday, October 06, 2007 7:23 AM
> To: Time nuts
> Subject: [time-nuts] OT: Test for NI IEEE-488 interface
>
> Gentlemen,
>
> I know this is a bit OT but otherwise I also know that some
> of you are well acquainted to IEEE-488 data acqusition:
>
> Suppose I can test whether the National Instruments DLL for
> their range of IEEE-488 interfaces is available on a Windows
> based system. Suppose also that I can load the DLL
> dynamically and find out whether all the expected function
> names are really exported by the DLL, i.e. if an
> IEEE-488 interface WERE really connected to the pc I would be
> in full control of it.
>
> What actions (DLL-calls) would you suggest for a good test of
> the presence of an IEEE-488 interface and it's basic
> functionality? The test should NOT involve any communication
> to instruments on the bus. Its just to find out whether an
> interface is available and if it can be expected to be in
> working condition.
>
> Best regards and TIA
>
> Ulrich Bangert
> www.ulrich-bangert.de
> Ortholzer Weg 1
> 27243 Gross Ippener
> Germany
>
>
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