GPIB: WIRETAPPING into GPIB

[XxtianX]

Hi Everyone,

What I am trying to to is wiretap the data from GPIB1  by another GPIB2 but it should not interfere with the communication on goin on with GPIB1 and the target device.

Details:

1.The source code for the program for the on going communication on the GPIB1 + target device can't be retrieve

2.I am thinking of tapping on the gpib1 through gpib2 + using a gpib to serial then connect it to a microcontroller and data to be sent through the network.

3.I am trying to intercept the data from GPIB1 then recieve it through GPIB2 then send it to the target device then recieve the reply to GPIB2 then send it to GPIB1- this way I could retrieve all datas (IN AND OUT).

my questions

1.for #2- Is this a possible solution? Can i retrieve the on going message to GPIB1 and Target device without interfering to the handshake?

2.for #3- I was able to simulate this but I am loosing my 2 NI GPIB to USB converters in MAX. they only appear occasionally

3. is there a better solutions for this like microcontroller ones..?

[Albert.Geven]

why not buy a gpib analyzer card?

[XxtianX]

expensive:)

[XxtianX]

I want to create a low cost solution

[Dennis_Knutson]

What are you trying to read that NI-Spy/IO-Trace does not tell you?

[XxtianX]

I want to be able to do what NI spy is doing but what to have a control programatically. Later on I would send it over the network and use this for my own logs.

[BriceS]

This KnowledgeBase article describes how you can programatically control NI I/O Trace from LabVIEW. This should let you do what you're trying to do programatically and create logs.

http://digital.ni.com/public.nsf/allkb/667F69EC03F5376886257A060049E632

[XxtianX]

Thanks Bro. I'll try that out tommorow

[Xtian_prodigy]

Brice. can you look unto this.. http://forums.ni.com/t5/Instrument-Control-GPIB-Serial/ASIC-interfacing/m-p/2154866/highlight/false#...

[zerotolerance]

I have this "Track History VI" that might be of some use. Provided that you are using it the right way, it can be a nice logging tool.