[sdiy] Audio Weaver for ST Discovery boards -Free!

[Scott Gravenhorst]

Ah, thanks for that.  One thing that pisses me off a bit is that it's still too uncommon for dev
boards (like this one) to have an on board audio codec.  Thankfully, the Discovery board does.  I
would think in these days where every product out there has a screen and sound that it would be
imperative to put at least an audio codec on the board.  The advantage for me is that when
developing driver code for a codec, it's comforting to know that the codec being placed there by
the mfr would seem to indicate that it _should_ work and that if there's a problem - it's your code.  

I may purchase the SAM E70 board after looking at the datasheet, but I can see I'll have to
jerry-rig a codec to some pins on the board - which will be SMD and having myopia plus presbyopia,
that's a problem.  Perhaps there's a plug in board... (not with my luck)  I've not yet had luck
coding I2S, but I can sharpen my chops on the Discovery board.  At least the E70 board isn't
expensive at about $30usa.  I'll need to determine what the difference is between S70 and E70.  The
S70 chip is the one used for the Tsunami Super WAV Trigger board.

paula at synth.net wrote:
>Scott,
>
>  You should take a look at this eval board for the SAM E70 -
>
>https://www.digikey.co.uk/product-detail/en/microchip-technology/ATSAME70-XPLD/ATSAME70-XPLD-ND/5725743

>
>  has a nice fast M7 CPU and a big chunk of RAM too ;)
>
>Paula
>
>On 2017-05-11 12:30, Scott Gravenhorst wrote:
>> Well, to be honest, I started looking at Microchip's (Atmel)
>> ATSAMS70N20 which includes
>> almost identical internal features.  It has a bit more internal RAM,
>> but the datasheet
>> says it runs up to 300 MHz.  The ARM on the 32F746GDISCOVERY board
>> runs up to 216 MHz.
>> However, I've not been able to find a dev board for the ATSAMS70N20.
>> 
>> So I have to say that this Discovery board is my second choice and
>> will be a super-major
>> step up from a dsPIC.  As for performance, I'll just have to see how
>> much synth I can
>> cram into it.  One interesting thing about both of the ARM ICs is that
>> they have a 2
>> channel 12 bit DAC that runs up to 1 MHz sample rate which might be
>> fun with naive
>> waveforms since the Nyquist limit is 500 kHz.  I've worked with a 12
>> bit DAC at that
>> sample rate using an FPGA and I noticed no alias problems with naive 
>> waveforms.
>> However, such a high sample rate will limit voice and feature count.
>> 
>> Anyway, I'll post about it once I've got a good feel for what it can
>> do.  All I have
>> right now is a bunch of PDF files.
>> 
>> Michael Zacherl <sdiy-mz01 at blauwurf.info> wrote:
>>> 
>>> On 11.May 2017, at 3:44 , Scott Gravenhorst <music.maker at gte.net> 
>>> wrote:
>>> 
>>>> I got some birthday money and bought this: 32F746GDISCOVERY
>>>> =
>>> 
>>>> It looks pretty nice.  I will try Audio Weaver when the board comes 
>>>> here.
>>> 
>>> at this price ($49 really?) it looks like a steal!
>>> How you=92d rank the cpu performance-wise?
>>> Additional I/O via SPI? (still thinking dc-coupled audio rate A/D D/A)
>>> 
>>> --
>>> http://mz.klingt.org
>>> 
>>> 
>>> _______________________________________________
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>> 
>> -- ScottG
>> ________________________________________________________________________
>> -- Scott Gravenhorst
>> -- http://scott.joviansynth.com/
>> -- When the going gets tough, the tough use the command line.
>> -- Matt 21:22
>> 
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>

-- ScottG
________________________________________________________________________
-- Scott Gravenhorst
-- http://scott.joviansynth.com/
-- When the going gets tough, the tough use the command line.
-- Matt 21:22