On Fri, Aug 1, 2008 at 6:31 PM, Eric Brombaugh <[EMAIL PROTECTED]> wrote: > > On Aug 1, 2008, at 1:58 PM, Philip Balister wrote: >>> >> I've been talking to a friend (he knows FPGA stuff much better than >> me) about using the expansion port to communicate with an FPGA via a >> SDIO interface. I don't think we can beat the current USRP data rate, >> but we should be able to reduce the latency introduced by the USB >> interface. > > Looks like the SDIO ports run up to 50MHz and have 8-bit wide data. No idea > how much overhead there is in that, but it might be able to go a bit faster > than USB2.0 and as you note would have a lot less latency. Hook up to a > decent FPGA and you could cram a bit of external pre-processing in as well. > I picked up one of the Avnet Xilinx Spartan 3A boards for $50 that would > probably work well for that.
We are hoping to create a board with a reasonable FPGA that works with existing USRP daughterboards. This would make a really neat system for small SDR nodes. I'll be sure to keep you updated on out progress. Using an existing dev board for developing the beagle to FPGA interface is a really good idea, thanks for suggesting it! Philip _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
