[hpsdr] Dumb question - HPSDR sound card

[Philip Covington]

On 4/4/07, Lyle Johnson <kk7p at wavecable.com> wrote:
> > You probably could do something like this (for the target price) with
> > the TI TLV320AIC23B CODEC:
> >
> > <http://focus.ti.com/docs/prod/folders/print/tlv320aic23b.html>
> >
> > and an Altera EPM240 CPLD + Cypress CY7C68013A "FX2" USB microcontroller.
>
> Or an STM STR7 or STR9.  These are Flash-based ARM CPus with USB (and
> Ethernet :-) support.  STM provides free software libraries and demos
> using this as a USB audio streaming device for input and output.  Use a
> CPLD like a Xilinx XCR3032 or similar (even cheaper than the Altera
> EPM240 since cost seems to be a driver here) and you're on your way...
>
> Sounds like a fun project, Terry!
>
> 73,
>
> Lyle KK7P

On the STM parts: Too bad they do not have a USB high speed interface
(only full speed).  I'd be concerned whether they would be able to
keep up at 96 kHz/24 bit.

I'll have to keep the XCR3032 in mind for future projects - they are
inexpensive.

73 Phil N8VB

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