Re: [Discuss-gnuradio] Problem with USB on OSX?

[Michael Dickens]

GR uses interface 1 for TX, and interface 2 for RX.  For some reason,  
LIBUSB finds that interface 1 is null, and thus not usable.  Hence  
the error.

You can get to the file in question via DarwinPorts:

port configure libusb
cd `port dir libusb`/work/libusb-0.1.12/

then the file that needs changing is "darwin.c".  I haven't had time  
to look through the details yet, to see what's changed on Darwin for  
Intel (for MacBook and Pro models only) and thus what needs to be  
changed for LIBUSB.  Might be simple, might not.  More as it  
comes ;-) - MLD

On Sep 16, 2006, at 2:03 PM, Ryan Pape wrote:
> usb_os_open: fffe:0002
> usb_claim_interface: called for interface 1
> Interface 0 of device is 0x00001163
> Interface 1 of device is 0x00000000
> claim_interface: No interface found; selecting configuration
> claim_interface: device has 1 configuration
> claim_interface: configuration value is 1
> claim_interface: Interface 0 of device is 0x00001903
> claim_interface: Interface 1 of device is 0x00000000
> USB error: claim_interface: interface iterator returned NULL
> USB error: usb_claim_interface: couldn't claim interface
> usrp_open_interface:usb_claim_interface: failed interface 1