stm32mp1-baremetal VS JUCE

2x A7 cores for running an OS (Linux, Android) or you can run bare metal code on them too. (https://github.com/4ms/stm32mp1-baremetal)

stm32mp1-baremetal and forum post and summary, linker script

As others have said, it’s not real-time Linux because it’s not Linux. I also want to add that if you require hard-real time and are ok with not having Linux, you can also use the A7 core for hard-real time applications. Some example projects here: stm32mp1-baremetal

I didn’t go through the 29 bytes you’re sending to the codec, but I do see you call the array “master”. The codec should be setup as slave. It could cause problems if the codec and ARM chip are both trying to be the master (generating the clocks). You’ve double/triple checked those bytes set up the codec properly? You may want to spell them out like I’ve done here: https://github.com/4ms/stm32mp1-baremetal/blob/master/examples/audio_processor/lib/mdrivlib/drivers/codec_CS42L51_registers.h

And if you want more processing power and memory, there are some audio examples in this project using a Cortex A7 (STM32MP157) bare-metal (512MB RAM, 800MHz) https://github.com/4ms/stm32mp1-baremetal

Personally, I started by writing externals for Pure Data, then started to contribute to the care. Later I took the same path for SuperCollider.

The more typical path, I guess, would be to start with simple audio plugins. Have a look at JUCE (https://juce.com/)!

Realtime audio programming has some rather strict requirements that you don't have in most other software. Check out this classic article: http://www.rossbencina.com/code/real-time-audio-programming-...

Check out https://juce.com in the meantime

You can definitely start putting C++ into your embedded projects, and get familiar with things in an environment in which you're already operating. A lot of great C++ code can be found with motivated use of, for example, the platformio tooling, such that you can see for yourself some existing C++ In Embedded scenarios.

In general, also, I have found that it is wise to learn C++ socially - i.e. participate in Open Source projects, as you learn/study/contribute/assist other C++ developers, on a semi-regular basis.

I've learned a lot about what I would call "decent C++ code" (i.e. shipping to tens of thousands, if not hundreds of thousands of customers) from such projects. I would suggest finding an open source C++ project, aligned with your interests, and study the codebase - as well as the repo history (i.e. gource) - to get a productive, relatively effortless (if the interests align) boost into the subject.

(My particular favourite project is the JUCE Audio library: https://juce.com/ .. one of many hundreds of great projects out there from which one can also glean modern C++ practices..)

Respect for the others here who recommend C but I think they’re possibly masochists. If anything JUCE, which uses C++ is in my opinion far more approachable.

Here's a link to their website: https://juce.com/

It seems like most audio plug-ins are built in C++ inside an audio coding program called JUCE, so maybe if I could open up the exisiting code inside that and then output it as an AU instead of a VST that could work.

C++ has https://juce.com/, I think.

Open source rule https://juce.com/