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Re: [Discuss-gnuradio] Beagleboard

From: Eric Brombaugh
Subject: Re: [Discuss-gnuradio] Beagleboard
Date: Fri, 1 Aug 2008 15:31:45 -0700

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

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.


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