Quick Change to fusb_darwin


#1

I made a quick change to the fusb_darwin code, to allow for the
possibility that the write() command might get called with more data
than the maximum allowed per transfer. While I’ve never seen the
number of incoming Bytes get that high, I’d rather have the code handle
it correctly on the off chance it does happen to someone. I also
updated “mld_threads” to the latest version, which allows for switching
between darwin’s pthreads and omni_threads, but provides a consistent
interface no matter which mechanism is used.

In the near future, I will be updating both gr-audio-osx and
fusb_darwin for cosmetic changes (mostly changing variable names from
“CamelCase” to “camel_case”). I will also be updating some of the
buffer classes to allow for optional use of a mutex to control access
to class internals (i.e. being “thread safe” or not). For example,
gr-audio-osx’s code must already be thread-safe because of the way
OSX/Darwin provides access to audio data, and thus having the buffer
also be thread-safe is redundant and unnecessary (and only adds
latency). fusb_darwin, OTOH, is not inherently thread-safe and thus
the buffer needs to provide this functionality.

Has any OSX user tried these codes out? Any success compiling and/or
executing? - MLD

ps> Has anyone successfully gotten GNURadio (and thus background
libraries and includes) to install and execute on an Intel-Mac? It was
good to see the note about “.align 4” versus “.align 16”, so I know
that folks are making progress. I hope to have access (remotely,
without USRP hardware) to an Intel-Mac soon and will start working my
way through the process. I will update my install guide (2) with
advice once I get it working, but I certainly welcome advice from
others who have already done this or are in the process of doing it.

(2) Currently at < http://www.nd.edu/~mdickens/GNURadio/ >, but
hopefully soon to be moved somewhere on < http://sdr.nd.edu/ >.


#2

Michael D. wrote:

ps> Has anyone successfully gotten GNURadio (and thus background
libraries and includes) to install and execute on an Intel-Mac? It
was good to see the note about “.align 4” versus “.align 16”, so I
know that folks are making progress. I hope to have access (remotely,
without USRP hardware) to an Intel-Mac soon and will start working my
way through the process. I will update my install guide (2) with
advice once I get it working, but I certainly welcome advice from
others who have already done this or are in the process of doing it.
I am almost there and I’ll send you my notes once I am a little further
with the USRP. I tried a few examples without the USRP, and everything I
tried showed signs of life. I am still working on the USRP part, and it
is looking promising. As soon as I can pry the machine out of my wife’s
hands, I’ll continue my quest.

The prerequisites weren’t hard, the process I used for the wxPython
libraries is somewhat questionable, but it appears to work.
fftw-3-single didn’t build from darwinports, and that’s because the
Portfile enables Altivec. Once I changed that, it built fine. Then
there’s the alignment issue in gnuradio-core, but that’s pretty much all
I had to do so far.

One question, do you have a pointer to a concise description of the USB
problems? I’ll be happy to test your fix for applicability to the Intel
Macs.

Cheers,
Jan