On Sat, Oct 9, 2010 at 2:54 AM, Elvis Dowson <[email protected]> wrote: > Hi Marcus, > > On Oct 9, 2010, at 4:44 AM, Marcus D. Leech wrote: > >> Not to be a wet-blanket or anything, but the USRP2 requires 1GiGe. The >> PHY/MAC isn't set up to negotiate 100Mbit. To support >> USRP2, you need a 1GiGE interface. That's part of the reason I went >> with the Sheeva Plug--it has 1GiGe. But it doesn't have floating >> point :-( > > I wasn't aware of that. Perhaps in this special case, the PHY/MAC FPGA > code could be reprogrammed to operate at 100Mbit, just to make it work with > the Overo? > > If that is sufficient bandwidth would depend upon the application, but it is > an > interesting experiment to try out.
I haven't actually run GNU Radio or connect the USRP to my Gumstix Overo Fire, but the highest data rate I could sustain over the USB 2.0 or the Ethernet interface using the Tobi expansion board was around 2.5 MBytes/sec. That may be sufficient for the USRP1 using the highest decimation rates. > I already got GNU Radio running on the Mac from sources. I also have been > working on the Gumstix Overo for about 2 years now with OpenEmbedded, > so it should be interesting just to port it across and run it off the overo. I noticed that when using the Angstrom online builder http://www.angstrom-distribution.org/narcissus/ one has the option to include GNU Radio (see under "Additional console packages"). This will not use the hardware DSP though. Alex _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
