Re: [Discuss-gnuradio] UHD Announcement - April 23rd 2010

[Josh Blum]

> I would really like to use the USRP2 with my MacBook. My first test with the 
> driver yields the following result:
>
> > $ uhd_find_devices
> > --------------------------------------------------
> > -- UHD Device 0
> > --------------------------------------------------
> > name: USRP2
> > addr: 192.168.10.2
> >
> >
> > Error: No buffer space available
>
> It seems that there is some problem in device::make, but I have no idea where 
> this error comes from. If this worked (or if it is no problem at all), what is 
> the easiest way to test things with the new driver (something like 
> usrp2_fft.py)?

Was there more verbose after that? It looks like it crashed or threw, 
trying to allocate a large buffer for the udp data socket.

I have not had a chance to test on macos/freebsd type platform. It seems 
that I need to rethink that buffer resizing code.

So, the culprit code is on line 130 
host/lib/transport/udp_zero_copy_asio.cpp, just remove that chunk of 
code that re-sizes the buffer and see if that fixes things for you.

The equivalent of usrp_fft would be to install the gr-uhd and to connect 
a UHD source to a fft sink in GRC.

Thanks for testing it, this is the first report of something working 
with the hardware on the mac!
-Josh