[sdiy] Some Audio DSP prototypes

Sat Apr 16 17:47:25 CEST 2022

For you high end processing guys this might not be helpful, but for more general MCU usage there are some Asian Cortex brands that are fully supported by Keil and buyable. Also some of them have inexpensive ($395) or free Keil seats so it's not a horrible experience.  For a list of legit ARM licensees supported: https://www.keil.com/dd2/

I'm looking at Holtek, Nuvoton, Sonix and GigaDevice at the moment.

GB

------ Original Message ------
From: "Mike Bryant" <mbryant at futurehorizons.com<mailto:mbryant at futurehorizons.com>>
To: "ackolonges fds" <ackolonges at hotmail.com<mailto:ackolonges at hotmail.com>>; "Eric Brombaugh" <ebrombaugh at gmail.com<mailto:ebrombaugh at gmail.com>>
Cc: "synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>" <synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>>
Sent: 4/15/2022 4:33:00 PM
Subject: Re: [sdiy] Some Audio DSP prototypes

> Is it possible to get something comparable to the STM32CubeIDE/ST-LINK/SWD workflow?

In a word, NO.  I’m in the middle of conversations with Eben, founder of RPL, but they really are stuck in the dark ages as regards embedded software development.  Everything is still based on how Broadcom developed software for STBs a decade ago, with no realisation that software development turned right when they turned left.  Lots of comments about this on the RPi forum, many from me :-)

Not that I’d regard CubeIDE as that much better – that’s another one where users on the STM forum have also been screaming for them to come to their senses and invest properly but they haven’t.

But as they say the RP2040 is the only game in town at the moment with regards to IC availability, so we’re stuck with them.  I’m using 26 RP2040s in a system but it really is a nightmare.  Development time with our usual STM32F730/H750s would have been under half the time and performed far better.

From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org<mailto:synth-diy-bounces at synth-diy.org>] On Behalf Of ackolonges fds via Synth-diy
Sent: 15 April 2022 23:40
To: synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>; Eric Brombaugh
Subject: Re: [sdiy] Some Audio DSP prototypes

Hi Eric,

That's fantastic - thanks so much for sharing your projects, it's very enlightening and helpful.

I've been thinking of converting a design to RP2040 from STM32 because of the shortage. It's not heavy on DSP, just controls a couple of I2C DACs, GPIOs, and uses an Input Compare timer. I have been using the STM32CubeIDE with an ST-LINK V2 programmer, and have found it very good, and debugging very convenient via SWD. From what I've searched on the RP2040 so far, the debugging is much less convenient than this. Would you please be able to comment on your programming/debugging setup for it? Is it possible to get something comparable to the STM32CubeIDE/ST-LINK/SWD workflow?

________________________________
From: Synth-diy <synth-diy-bounces at synth-diy.org<mailto:synth-diy-bounces at synth-diy.org>> on behalf of Eric Brombaugh via Synth-diy <synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>>
Sent: Friday, April 15, 2022 11:05 AM
To: synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org> <synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>>
Subject: [sdiy] Some Audio DSP prototypes

Hey folks,

A while back there were some lengthy threads that veered off into
discussions of what to do about audio DSP in these times of MCU
shortages. I mentioned some projects with RP2040 and ESP32 that I've
been puttering around with for the last few months. I've gotten them to
a presentable stage now and have published them on my github here:

https://github.com/emeb/RP2040_Audio

https://github.com/emeb/ESP32S2_Audio

You'll notice a lot of similarities - that's intentional as I wanted to
be as much apples:apples as possible and it's allowed me to evaluate
them with very similar use-cases.

Overall I prefer the ESP32 for the faster speed and PSRAM, but both
systems are usable and not difficult to work with. Definitely worth
considering if you're casting around for alternatives for the
high-powered ARMs that we can't get these days.

Eric
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