Acquiring Data with USB-9215 on MAC OS

[mbtucker]

I am new to LabVIEW on the MAC OS and am not having much luck duplicating a project I have done on Windows.  The project is interfacing an Exercise Bike with a MAC.  I was originally told that I could create a VI on Windows and move it over to the MAC, which obviously wasn't completely correct.  I am attempting to acquire 2 signals from the bike, but I can't figure out the task utility and when I attempt to create a virtual channel, I get the error "200170: Physical Channel does not exist on this device".  According to "lsdaq" the machine is seeing the USB-9215 that I am attempting to use.  Can someone please create a short example, link me to an example (I have looked everywhere for an example of acquiring data on a MAC and been completely unsuccessful), or explain how to go about acquiring the signals so that I can create my VI.  I simply need to know how to acquire the signals in LabVIEW and from there I will be fine.

Any help would be greatly appreciated.  My senior design project depends on it.

Sincerely,

Michael

[mbtucker]

Okay, at this point I have been able to get the signal.  Now my only problem is that I have to rename the task each time I run the VI.  I want to be able to run the VI and not have to rename the task.  Is there a way to do this?

Thanks,

mt

[ryan_d]

Hi Michael,

The error you experienced earlier (200170) can occur when you are using an incompatible driver version. The User Guide and Manual for the USB-9215 specifies the appropriate drivers to use on page four. The USB-9215 is most likely using the 9161 carrier, so you need to make sure that you're using DAQmx Base 2.2 or earlier. You can download the 2.1 driver for MAC here. Keep in mind that DAQmx Base is a different driver than the more common DAQmx, so if you use DAQmx VIs, you will need to rewrite your program to utilize the Base driver.

If you’ve already done this and still have to rename your task every time, please post a screen shot or a minimized/reduced version of code that still produces the problem.

Post back if you have any questions. Have a great day!

Message Edited by ryan_d on 11-19-2007 10:43 AM