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Diffstat (limited to 'usrp/host/lib/README_OSX')
| -rw-r--r-- | usrp/host/lib/README_OSX | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/usrp/host/lib/README_OSX b/usrp/host/lib/README_OSX deleted file mode 100644 index 37026f25a3..0000000000 --- a/usrp/host/lib/README_OSX +++ /dev/null @@ -1,63 +0,0 @@ -USRP Darwin Fast USB Changes -Version 0.2 of 2006-04-27 -Michael Dickens <mdickens @at@ nd .dot. edu> - -The files included in this archive are: - -circular_buffer.h -circular_linked_list.h -darwin_libusb.h -fusb_darwin.cc -fusb_darwin.h -mld_threads.h - -These files allow GNURadio code for Darwin / MaxOS X to talk to the -USRP via USB 2.0 at rates up to around 30 Mega-Bytes/sec (MBps), up -from 4-8 MBps without the changes. - -I implemented the buffering myself; there are probably GR buffers -available which would do the work but as this is "beta" software it's -a good place to start. Speed improvements are made by porting -LIBUSB's non-true async bulk read and write functions into USRP's -"fusb", and upgrading them to handle -true- async transfers. -Unfortunately, the easiest way to do this is to spawn a thread or 2 to -handle the "async" part of the transfers. This implementation uses -Darwin's pthreads to do the work for mutexes, conditions, and threads. -Previous implementations (0.1 and before) used "omni_threads" as -provided by gnuradio-core, which caused issues with compiling and -execution ... I'm glad that this is no longer the case. - -As far as I have tested, there is no way to improve the throughput to -32+ MBps without moving into Darwin's "port"s ... a kernel-level data -transport method with a user/application layer for USB-specific -functions. Unfortunately, Apple's documentation for these "port"s is -minimal; I have learned more from reading the Darwin source code -< http://darwinsource.opendarwin.org/ > than by reading Apple's -documents! This would also require -not- using LIBUSB, of which the -removal from the rest of the USRP code would be potentially tedious. - -If you run into issues either compiling or testing the USRP on -OSX, please send me a note. - -(1) Go through the bootstrap, configure, compile, and install as -usual (e.g. see < http://www.nd.edu/~mdickens/GNURadio/ > for my -usual). - -(2) from .../usrp/host/apps : run the scripts -++++++++++++++++ -./test_usrp_standard_tx -./test_usrp_standard_rx -++++++++++++++++ - -For -all- systems I've tested on thus far, both of these return -exactly 41 overruns / underruns, and -most- systems start out with a -stalled pipe. This stall comes in a usb_control function call to -LIBUSB; one would have to change the LIBUSB code to handle this issue. - -(3) from gr-build/gnuradio-examples/python/usrp : -++++++++++++++++ -./benchmark_usb.py -++++++++++++++++ - -(4) If you get to here, the try doing the FM receiver (gui or not). -If that sounds correct, then the USB is working. Yay!
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