[Discuss-gnuradio] USB Issues

[Michael Dickens]

The primary issues right now are that (1) both the USRP and my  
fusb_darwin codes copy LIBUSB internals to get the job done (mine is  
very dependent right now, but I'll reduce that with re-programming  
some things); and (2) some LIBUSB calls are made directly, while  
others are through the USRP's "fusb" implementation.  My fusb_darwin  
code is much more efficient that libusb's already since it's darwin- 
specific (instead of an OS-blind wrapper into darwin code), but could  
be even more so if all the USB calls were routed through it (i.e. I  
would put all the USB code into FUSB, and not even use LIBUSB; a C++  
class works -so- much better than LIBUSB's C code).

Thus, IMHO what needs to happen is to route -all- USB calls through  
FUSB, so that there is 1 place to deal with "everything USB".  That  
won't immediately take care of the "internals" problem, but it would  
centralize all USB calls and issues into a few files, and make a  
cleaner USB interface for all platforms.  Thoughts? - MLD