As Eric mentioned, the USB support for MacOS X isn't up to speed
yet. I have been playing around with both libusb's "darwin" and
USRP's "fusb_darwin" codes over the holidays, with no success (though
some changes I will eventually provide since they are either bug
fixes or augments for MacOS X 10.4). I will post an email soon
regarding my efforts (or success, if that happens), in the hope that
someone might have "been there and done that" before and can offer
suggestions; a quick summary would be "it's either really trivial but
difficult to find, or really trick and difficult to find". There
seems to be no issue with transport at 2 MBps, usually not for 4 MBps
(but sometimes, yes), but nothing beyond that ... it's as if the
Mac's USB controller isn't being set to "480 Mbps" ("high speed"
according to Apple's documentation) mode.
gr-audio-osx is being tested at UND, and I'll release a first version
sometime soon. BTW: Either this should be renamed "gr-audio-darwin"
or the "darwin" named codes and references in (e.g.) USRP should be
renamed "osx". I believe the latter is the proper naming solution,
as the audio and USB support are provided in OSX libraries which (to
the best of my knowledge and understanding) are not part of darwin.I
just updated my local gr-build copy, and can confirm that those
modules compile and install without error in the order listed. I use
DarwinPorts for all the background stuff.
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