Re: [Discuss-gnuradio] Details on Ettus E100?

[Matt Ettus]

On 12/14/2010 08:34 AM, Douglas Geiger wrote:
>   Thanks Matt - that's very helpful. Interesting in that the Gumstix
> configures the FPGA. I see the fpga-downloader program in
> host/lib/usrp/usrp_e100 that does the work, and presumably with the
> stock linux distribution you're shipping it has the image file in some
> default location, and it looks like the uhd driver calls a magic
> find_image_path function to find it.

Yes.

> Are you all working on an
> E-Series Application Note like the rather nice ones already existent
> for the USRP1/2/N-series? Perhaps you could include some notes for
> those of us who would want to create a custom distro image for our
> E100's.Do you plan to share/host a repository of the default distro
> loaded on the Gumstix? Are you using Angstrom to build that image?

We have based our distro on Angstron and OpenEmbedded.  The vast 
majority of packages come from the standard repositories, and we have 
our UHD and kernel driver work added to that.

> As a side note it looks like there is no aeMB/microblaze loaded in the
> fpga for the e100 (at least not in the fpga/usrp2/top/u1e directory,
> which I assume is the correct place to look), so no firmware file to
> create/load - which also presumably leaves more room for DSP work,
> yes?


There is no aeMB so there is no firmware in the sense that we have on 
the USRP2.  The OMAP fulfills that role because it has direct 
low-latency bus access to the FPGA.  The FPGA can directly interrupt the 
CPU as well.

Matt