Re: [Discuss-gnuradio] User experience with E1x0 boards

[Philip Balister]

On 04/22/2011 06:00 PM, Almohanad Fayez wrote:
> I haven't worked with the E100 per se but I've worked with the Beagleboard + 
> USRP1 which is the same thing except the E100 uses SPI to communicate with the 
> processor versus USB.  So I've done work on integrating the OMAP3530 DSP with 
> the GPP within GNU Radio.  I feel that the use of the DSP is a MUST to make the 
> most out of the E100 and with my Beagleboard + USRP setup I was able to run 
> some FM flowgraphs but one of my bottlenecks was the USB USRP interface which 
> the E100 would definitely fix.

Al points are good, except the E100 uses the GPMC bus to communicate 
with the FPGA. 16 bit wide data bus instead of 1 :)

Philip

> Basically with the E100 I feel that you need to get your hands "dirty" where 
> you might need to rewrite some GNU Radio components to make use of the NEOS coprocessor, 
> which Philip Balister has done some good work in that respect, and you would also need to 
> make use of the C64x+ DSP which I can point you to the source code I've developed.
>
> The E100 has a lot of untapped potential at the moment and I hope to see more 
> momentum in working with the NEOS and DSP which is what I'm focusing on and 
> willing to help people to get started on.
>
>
> al fayez
>
>
> -----Original Message-----
> From: Colby Boyer<address@hidden>
> To: GNU Radio Discussion<address@hidden>
> Sent: Fri, Apr 22, 2011 5:43 pm
> Subject: [Discuss-gnuradio] User experience with E1x0 boards
>
>
> Hi All,
> My lab is interested in purchasing some USRPs. It is pretty settled
> hat some of the boards will be the N2x0 series, but I am interested
> o hear from people who have used the E1x0 boards. From what I can
> ell, the E1x0 board should have better latency performance than the
> 2x0 and should have a better interface with the FPGA (GPIO pins);
> lso, it has an onboard DSP. It seems that the latency would be the
> ain motivation for the product, from an experimental point of view.
> Has anyone tried integrating processing on the FPGA and DSP to get
> etter latency results? Your thoughts on the board versus the N2x0?
> If you want to take the discussion off list, feel free to.
> Thanks,
> olby
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