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Hi Phil, et. al.,<br>
<br>
One thing I would like you to think about is the long term availability
of the computer boards you propose to use. Try and do it in such a way
that it will work with future generations of similar boards with no
modifications. Back in 1998 I did a <a
href="http://people.wallawalla.edu/%7ERob.Frohne/R2_DSP/Motorola_DSP_Receiver.html">similar
project</a> that used very a cheap Motorola DSP56002EVM board. It was
great until those evaluation boards weren't available anymore, which
happened much too quickly, and I couldn't afford to purchase new
evaluation boards to port my code to every time they changed.<br>
<br>
73,<br>
<br>
Rob, KL7NA<br>
<br>
<br>
<br>
On 07/09/2010 01:32 AM, Phil Harman wrote:
<blockquote
cite="mid:2b76f9a6ba4357de84b9e4f523643be0.squirrel@webmail.eftel.com"
type="cite">
<pre wrap="">***** High Performance Software Defined Radio Discussion List *****
All,
There seems to be some interest in building a Microprocessor/DSP board
that will plug into the Atlas bus and enable an openHPSDR system to
operate without the need to have a PC connected.
Whilst one option would be to design and manufacture our own board from
scratch, which would be an interesting and challenging project, another is
to build on existing work by others.
The Beagle board (<a class="moz-txt-link-freetext" href="http://beagleboard.org/">http://beagleboard.org/</a>) looks like a suitable
candidate since it has both an OMAP3530 processor and TMS320C64x+™ DSP.
It also appears that some SDR support is already available in that dttSP
has been ported and support for the SoftRock exists.
In terms of getting data into the DSP from the Atlas bus there is an
McBSP3 interface, which I understand can be configured as I2S, that
connects directly to the DSP.
The suggestion is that we design a simple, low cost, mother board that
will take a Beagle board and enable it to be interfaced to the Atlas bus.
This would be along the same lines as what the USRP folks are doing here:
<a class="moz-txt-link-freetext" href="http://members.cox.net/ebrombaugh1/embedded/beagle/beagle_fpga.html">http://members.cox.net/ebrombaugh1/embedded/beagle/beagle_fpga.html</a>
We can also build on ideas from the BeagleBrick announced at Dayton this
year:
<a class="moz-txt-link-freetext" href="http://beagleboard.org/project/BeagleBrick/">http://beagleboard.org/project/BeagleBrick/</a>
Kevin, M0KHZ, has available to layout a suitable PCB and I'd be happy to
develop any FPGA code that may be required.
Is there any interest in such a project and anyone willing to be the
project leader please?
73's Phil....VK6APH
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Rob Frohne, Ph.D., P.E.
E.F. Cross School of Engineering
Walla Walla University
100 SW 4th Street
College Place, WA 99324
(509) 527-2075 <a class="moz-txt-link-freetext" href="http://people.wallawalla.edu/~rob.frohne">http://people.wallawalla.edu/~rob.frohne</a>
</pre>
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