GPIB-USB with Mac Lion?

[WilliJD1]

Hi Everyone,

I like to run a number of GPIB-controlled instruments with Matlab on MacBookPro running Lion 10.7.2.  I have installed the latest drivers from NI (4882MacOSX301) for my hardware, which is the GPIB-USB-HS interface.

I also installed the 32 bit version of Matlab (R2010a/7.10i).

Neither tmtool nor instrhwinfo find/show any instrument.

Trying gpib('ni',0,24) results in this error message:

>> gpib('ni',0,24)
??? Error using ==> gpib.gpib>gpib.gpib at 155
Unable to load NI GPIB interface. Please check that the necessary
drivers are installed on your machine.

Any idea how to solve this issue?

Thank you.

[CarstenS]

Hi,

you can use this tool to check if the driver is installed correctly and the device is working fine

Kind regards

Carsten

[WilliJD1]

Thank you for the quick answer and advice.

The Interactive Control shows all connected GPIB instruments and the "*IDN?" query shows the proper names of the instruments. I assume, hence, the drivers are installed properly.

I also have Parallels with Win7. In that VirtualBox everything works as intended even with the 64-bit Matlab.

Working natively in OS X would be, however, the preferred solution.

[WilliJD1]

Hi,

The "gpib('ni',0,24)" did not work in my case.

A solution, however, is to use the following command:

obj1 = visa('NI', 'GPIB0::24::0::INSTR');

I figured this out by using the "NI VISA Configuration" tool provided with LabView.