On Wed, Jan 27, 2010 at 10:54, Tom Gross <tomgr...@gmail.com> wrote: > Johnathan, the custom FPGA firmware you describe sounds like it might > be perfect for what we want to do, provided it's not impossible to > demux the data stream.
It's straightforward. Just use gr.deinterleave(gr.sizeof_gr_complex) after the usrp2.source_32fc block, and attach two separate complex input block chains to outputs 0 and 1 of the deinterleaver. Also, the minimum decimation rate becomes 8 instead of 4 (this isn't checked for.) > I haven't seen any usrp2 FPGA sources (they > don't appear to be in either the 3.2.2 or 3.3.3 tarballs) - I guess > this means I need to figure out the new "git" stuff... The FPGA code is not distributed as part of GNU Radio (it's a product of Ettus Research). It's currently hosted inside the gnuradio.org repository, though that will be changing. For now, though, the only git fu you need to know is: $ git clone git://gnuradio.org/gnuradio ...to create your own complete repository (assuming you already have git installed.) > it sounds like I will need to get a Xilinx compiler to build them, > once I find them. Yes. FYI, the USRP2 FPGA requires the full version of the Xilinx ISE tools; the free version won't work. Also, you specifically need release 10.1 with SP3. There are currently problems synthesizing even the standard image with newer versions of the tools. Johnathan _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
