[hpsdr] Blackfin

[Rob Frohne]

Hi All,

I don't mean to throw cold water on the idea.  It probably makes more
sense in India where there may not be as many surplus PCs, laptops, etc.
available at cheap prices.  It seems to me, for most of us it will be
hard to beat a laptop interfaced via USB to Atlas et. al.  One of the
things I really like about the way things are being done these days is
that if you use PC's you can upgrade them easily, they are inexpensive
and powerful.  I once build a DSP software based receiver
(http://www.wallawalla.edu/frohro/R2_DSP/R2-DSP.html) using a Motorola
EVM.  It was great until the evaluation boards were no longer available.
Now nobody can duplicate it without finding an obsolete piece of
hardware.  If we stick with PC's that isn't as likely to happen.  They
have beautiful displays, etc.

73,

Rob, KL7NA

On Wed, 2007-07-11 at 16:18 -0400, Philip Covington wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> On 7/11/07, Lyle Johnson <kk7p at wavecable.com> wrote:
> > ***** High Performance Software Defined Radio Discussion List *****
> >
> > > One thing I over looked (thanks to Steve KA6S) is that, there is going
> > > to be a huge software effort to port/rewrite dttsp in fixed point.
> > > Sasquash does not have that problem. TI C67xx floating point tools can
> > > be used to cross compile DTTSP for C67xx and some C-level
> > > optimizations can be done specific to C67xx without even writing any
> > > assembly code for it.
> >
> > This will be done for Sasquatch because it is being done for the AMSAT
> > SDX, but some of the core stuff is also being/has been ported to the
> > dsPIC for SuitSat-2, so there will be some 16-bit fixed-point code base
> > to work from.
> >
> > And a DSP-based portable radio doesn't have to be based on this core,
> > see EMRFD, Johan Forrer's ASP code, Bob Larkin's DSP-10 and Peter
> > Rhodes' Pic A Star for some examples.
> >
> > Lyle
> >
> 
> I still wonder if it would not be just as cost effective to use a
> mini-ITX board instead of custom DSP board for a stand alone radio?
> It might not be as power efficient, but everything as far as the DSP
> code is already in place (DttSP) to get the job done.
> 
> 73 Phil N8VB
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at hpsdr.org
> Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> HPSDR web page: http://hpsdr.org
> Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
-- 
Rob Frohne, Ph.D., P.E., Professor
E.F. Cross School of Engineering
Walla Walla College
100 SW 4th St.
College Place, WA 99324
(509) 527-2075
http://www.wwc.edu/~frohro/


 1184203750.0