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vrf Programmatically Finding GPIB Devices

Question asked by VRFuser on Jul 12, 2006

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Why not look at the examples

Â

ExamplesInstrumentIODynamicFindRemoteInstruements.VeeÂ is a good example which finds everything on any interface and tells you what it is.

Â

Just modify the bits you need.Â It will be a lot faster than cycling through the addresses.

Â

Adam Kohler

SVV

Wireless Division

South Queensferry

Scotland

Â

t 313 3527

e adam_kohler@agilent.com

Â _____ Â

From: Crossland Shawn R MSgt 193OPS/DOOW-E [mailto:shawn.crossland@paharr.ang.af.mil]
Sent: Wednesday 12 July 2006 20:08
To: VRF
Subject: [vrf] Programmatically Finding GPIB Devices

Â

Hello all,

I used to be a vrf member for several years.Â Then, I stopped because my company decided to stop using Vee.Â Now, I'm back using Vee in another application.

Here's my problem:Â My older computer used Vee 5 and had an RS-232 to GPIB converter made by National Instruments.Â In that set up, I could programmatically step through all 30 GPIB addresses and "discover" what was out on the bus.

My newer computer is running Vee 7 and it has a USB to GPIB converter.Â Since Vee IO natively "sees" the USB interface, I don't know how to step through each GPIB address to discover what devices are there.

In my set up, it's possible that equipment will be removed for calibration and the replacement piece will have a different GPIB address than the one it replaced.Â Ultimately, I want my program to be able to a change in GPIB addresses.

Any ideas?

Thanks,

-Shawn

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VRFuser Jul 12, 2006 12:08 AM
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2658.34"><TITLE>Programmatically Finding GPIB Devices</TITLE></HEAD><BODY>Hello all,I used to be a vrf member for several years. Then, I stopped because my company decided to stop using Vee. Now, I'm back using Vee in another application.Here's my problem: My older computer used Vee 5 and had an RS-232 to GPIB converter made by National Instruments. In that set up, I could programmatically step through all 30 GPIB addresses and "discover" what was out on the bus.My newer computer is running Vee 7 and it has a USB to GPIB converter. Since Vee IO natively "sees" the USB interface, I don't know how to step through each GPIB address to discover what devices are there.In my set up, it's possible that equipment will be removed for calibration and the replacement piece will have a different GPIB address than the one it replaced. Ultimately, I want my program to be able to a change in GPIB addresses.Any ideas?Thanks,-Shawn --- You are currently subscribed to vrf as: rsb@soco.agilent.com To subscribe please send an email to: "vrf-request@lists.it.agilent.com" with the word subscribe in the message body. To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com". Search the "unofficial vrf archive" at "www.oswegosw.com/vrf_archive/".</BODY></HTML>
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VRFuser Jul 12, 2006 12:06 PM
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Hello all,

I used to be a vrf member for several years.Â Then, I stopped because my company decided to stop using Vee.Â Now, I'm back using Vee in another application.

Here's my problem:Â My older computer used Vee 5 and had an RS-232 to GPIB converter made by National Instruments.Â In that set up, I could programmatically step through all 30 GPIB addresses and "discover" what was out on the bus.

My newer computer is running Vee 7 and it has a USB to GPIB converter.Â Since Vee IO natively "sees" the USB interface, I don't know how to step through each GPIB address to discover what devices are there.

In my set up, it's possible that equipment will be removed for calibration and the replacement piece will have a different GPIB address than the one it replaced.Â Ultimately, I want my program to be able to a change in GPIB addresses.

Any ideas?

Thanks,

-Shawn

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rsb Jul 12, 2006 12:26 PM
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Crossland Shawn R MSgt 193OPS/DOOW-E <shawn.crossland@paharr.ang.af.mil> wrote:
> Hello all,
> I used to be a vrf member for several years. Then, I stopped because my
> company decided to stop using Vee. Now, I'm back using Vee in another
> application.
> Here's my problem: My older computer used Vee 5 and had an RS-232 to GPIB
> converter made by National Instruments. In that set up, I could
> programmatically step through all 30 GPIB addresses and "discover" what was
> out on the bus.
>
> My newer computer is running Vee 7 and it has a USB to GPIB converter.
> Since Vee IO natively "sees" the USB interface, I don't know how to step
> through each GPIB address to discover what devices are there.
>
> In my set up, it's possible that equipment will be removed for calibration
> and the replacement piece will have a different GPIB address than the one it
> replaced. Ultimately, I want my program to be able to a change in GPIB
> addresses.
>

Not sure what you were doing before, but I would guess that you were
querying easy address to see which ones respond.

I would expect you can do the same thing in VEE 7 by creating
a dummy instrument and stepping its address using a formula
with the appropriate line, such as

IO.dummyInstrument.address=value;

to set the address then a direct IO to query the instrument ( dummyInstrument )

Or do the same sort of thing with a "multi instrument direct IO" since
you can set address via an input.

Stan

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Stan Bischof Agilent Technologies 707-577-3994 stan_bischof@agilent.com
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VRFuser Jul 12, 2006 12:27 PM
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Crossland Shawn R MSgt 193OPS/DOOW-E <shawn.crossland@paharr.ang.af.mil> wrote:
> Hello all,
> I used to be a vrf member for several years. Then, I stopped because
> my company decided to stop using Vee. Now, I'm back using Vee in
> another application.
> Here's my problem: My older computer used Vee 5 and had an RS-232 to
> GPIB converter made by National Instruments. In that set up, I could
> programmatically step through all 30 GPIB addresses and "discover"
> what was out on the bus.
>
> My newer computer is running Vee 7 and it has a USB to GPIB converter.
> Since Vee IO natively "sees" the USB interface, I don't know how to
> step through each GPIB address to discover what devices are there.
>
> In my set up, it's possible that equipment will be removed for
> calibration and the replacement piece will have a different GPIB
> address than the one it replaced. Ultimately, I want my program to be
> able to a change in GPIB addresses.
>

Not sure what you were doing before, but I would guess that you were querying easy address to see which ones respond.

I would expect you can do the same thing in VEE 7 by creating a dummy instrument and stepping its address using a formula with the appropriate line, such as

IO.dummyInstrument.address=value;

to set the address then a direct IO to query the instrument ( dummyInstrument )

Or do the same sort of thing with a "multi instrument direct IO" since you can set address via an input.

Stan

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

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adam_kohler Jul 12, 2006 4:53 PM
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<html><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 11 (filtered)"><title>Programmatically Finding GPIB Devices</title><style></style></head><body lang=EN-GB link=blue vlink=purple><div class=Section1>Why not look at the examples ExamplesInstrumentIODynamicFindRemoteInstruements.Vee is a good example which finds everything on any interface and tells you what itis. Just modify the bits you need. It will bea lot faster than cycling through the addresses. <div>Adam KohlerSVVWireless DivisionSouth QueensferryScotland<spanstyle='font-size:12.0pt;color:navy'> t 313 3527e adam_kohler@agilent.com</div><div><div class=MsoNormal align=center style='text-align:center'><hr size=2 width="100%" align=center tabindex=-1></div>From:<fontsize=2 face=Tahoma>Crossland Shawn R MSgt 193OPS/DOOW-E [mailto:shawn.crossland@paharr.ang.af.mil]
Sent: Wednesday 12 July 2006 20:08
To: VRF
Subject: [vrf] ProgrammaticallyFinding GPIB Devices</div> Helloall,Iused to <spanstyle='font-size:10.0pt;font-family:Arial'>be a vrf member for severalyears. Then, I stopped because my company decided to stop usingVee. Now, I'm back using Vee in another application.Here'smy problem: My older computer used Vee 5 and had an RS-232 to GPIBconverter made by National Instruments. In that set up, I <fontsize=2 face=Arial>couldprogrammaticallystep through all 30 GPIB addresses and <spanstyle='font-size:10.0pt;font-family:Arial'>"discover" what was out onthe bus.Mynewer computer is running Vee 7 and it has a USB to GPIB converter. SinceVee IOnatively "sees" the USB interface, I don't know how to stepthrough each GPIB address to discover what devices are there.Inmy set up, it's possible that equipment will be removed for calibration and thereplacement piece will have a different GPIB address than the one itreplaced. Ultimately, <spanstyle='font-size:10.0pt;font-family:Arial'>I want my program to be able toachange in GPIB addresses.Anyideas?Thanks,-Shawn
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Search the "unofficial vrf archive" at"www.oswegosw.com/vrf_archive/". </div> --- You are currently subscribed to vrf as: rsb@soco.agilent.com To subscribe please send an email to: "vrf-request@lists.it.agilent.com" with the word subscribe in the message body. To unsubscribe send a blank email to "leave-vrf@it.lists.it.agilent.com". To send messages to this mailing list, email "vrf@agilent.com". If you need help with the mailing list send a message to "owner-vrf@it.lists.it.agilent.com". Search the "unofficial vrf archive" at "www.oswegosw.com/vrf_archive/".</BODY></html>
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