j-link issue if used with Nordic EK j-link OB

[cocoa]

I wish to inform Nordic about this issue with jlink OB used on EK boards when used in OS X environment.

J-link OB returns " Can not connect to J-Link via USB." and a CDC disabling is due to establish a connection.

But, if I use j-link Lite Cortex M there are no problems, the connection is ready without disabling CDC.

All firmwares are updated.

Not fatal but annoying .

-c

[cocoa]

Thank you RK, I 've read it previously.

My doubts are starting from release Jlink version 4.74 (the last one in .dmg format). In README.txt Segger wrote :

Requirements
============
libusb is no longer required.

So, I am inclined to think that starting from this version, libusb no longer used by Segger in OS X Jlink.

I've not installed any libusb on my mac.

But the main question here is why Jlink Lite cortexM-9 works fine without disabling CDC and Jlink OB on Nordic EK boards doesn't.

Any idea about ?

-c

[Ole Morten]

The J-Link Lite does not have a CDC interface and hence you don't need to do the module unload tweak that the Segger thread RK links to talks about.

I guess the removal of the libusb dependency may be because Segger have chosen to statically link with the library, instead of depending on it being on the system.