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From: | Nikhil Adnani |
Subject: | Re: [Discuss-gnuradio] Beagleboard |
Date: | Mon, 04 Aug 2008 19:30:09 -0400 |
User-agent: | Thunderbird 2.0.0.16 (Windows/20080708) |
Eric A. Cottrell wrote:
Philip Balister wrote:On Fri, Aug 1, 2008 at 6:31 PM, Eric Brombaugh <address@hidden> wrote:On Aug 1, 2008, at 1:58 PM, Philip Balister wrote: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 fasterI'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.than USB2.0 and as you note would have a lot less latency. Hook up to adecent 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 wouldprobably 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! PhilipHello,Since I have some receive only applications I would like to see a box that took one RX or a RX/TX set of USRP daughterboard(s).
We had also wanted a board that was optimized for wideband signal reception, processing and analysis. So we designed and built one with an RF front-end and ADC to support 85MHz bandwidth, and an FPGA foragile radio control and additional on-board processing. The radio receiver is designed for high P1dB, low noise figure and hence large operating amplitude range. We've currently got two flavors: 2.4GHz and 1.9GHz.
The intended applications for our system are network-based, distributed spectral & signal analysis. In general it's useful for wideband test & measurement applications. The system runs linux and can go fully standalone, but we've also included support for USB2.0 and Ethernet interfaces.
We'll have a few beta units available this fall, so if you're interested in details, feel free to get in touch.
Nikhil
The OMAP has some interesting interfaces and I wonder if some of them could be adapted for a more general I/O use. I am more familiar with the earlier versions of the OMAP. It will be nice to use the DSP for some signal blocks and use the ARM for more general UI and I/O blocks.73 Eric _______________________________________________ Discuss-gnuradio mailing list address@hidden http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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