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

[Scott Gravenhorst]

Ah, so you've already been down this road.  I prefer simple, so I'll take a pass.  

At this point, my best bet is to use the Discovery since it's got everything I need, just
a bit slower than I'd prefer, but can certainly help me with two major hurdles 1) the
codec coding and 2) this is bare metal - I've done bare metal with FPGAs and dsPICs, but
not yet with ARM.  The stuff I did with ARM on the Rpi3 is ALSA based, but after my
experience with dsPIC, I do prefer the control I have when doing a bare metal project.

Given that I'd use Audio Weaver - are there restrictions?  I do have intentions to sell
synth equipment with my code in it.  Will I be able to create and distribute such code
using Audio Weaver and not have legal license problems?

Jason Tribbeck <jason at tribbeck.com> wrote:
>
>While there are two I2S interfaces, neither of them are fully accessible
>via the I/O connectors (both use wires that are only connected to the
>memories).
>
>Shame - looked quite nice otherwise!
>
>On Thu, 11 May 2017 at 14:51 Scott Gravenhorst <music.maker at gte.net> wrote:
>
>>
>> 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 > >>> > >>> > >>> 
>_______________________________________________ > >>> Synth-diy 
>mailing list > >>> Synth-diy at synth-diy.org > >>> 
>http://synth-diy.org/mailman/listinfo/synth-diy > >>> > >> > >> 
>-- ScottG > >> 
>________________________________________________________________________ 
>> >> -- Scott Gravenhorst > >> -- http://scott.joviansynth.com/ > 
>>> -- When the going gets tough, the tough use the command line. 
>> >> -- Matt 21:22 > >> > >> 
>_______________________________________________ > >> Synth-diy 
>mailing list > >> Synth-diy at synth-diy.org > >> 
>http://synth-diy.org/mailman/listinfo/synth-diy > > > > -- ScottG 
>> 
>________________________________________________________________________ 
>> -- Scott Gravenhorst > -- http://scott.joviansynth.com/ > -- 
>When the going gets tough, the tough use the command line. > -- 
>Matt 21:22 > > _______________________________________________ > 
>Synth-diy mailing list > Synth-diy at synth-diy.org > 
>http://synth-diy.org/mailman/listinfo/synth-diy > 
>

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