[sdiy] New cute "Microcontrollers" - STM32U with integrated GPU for UIs (+math accel + analog stuff)

[sleepy_dog at gmx.de]

Mike Bryant:
>  brianw <brianw at audiobanshee.com> wrote
> Personally, I prefer to avoid operating systems and to avoid the ARM A
> series.
>
> I also avoid OSes, but I use bare metal on a Raspberry CM4 in the
> latest incarnation of my additive polysynth.  Amazing how much having
> gigabytes of memory and the capability of almost a thousand sinewaves
> frees up some of the compromises one has to make with a smaller
> processor :-)

Whoa! Looking into that (but using a modest Pi Zero) I have had on my
todo list for a whlie...
How much pain is it to get into bare metal development on that thing,
compared to STM32 or PIC?
Indeed the decadent amount of RAM, and the prospect of pairing that with
low-latency, kinda makes me drool, LOL.

I personally would not hesitate to actually use FreeRTOS on a thing like
that, e.g. the UI and file operations and stuff like that, well, why not.
Have used FreeRTOS on some STM32L476 or so in the past where there
really was a benefit of running stuff in several threads, and using
everything in ISR mode like some people do seems a bit whacky when the
processor has HW support for threads (e.g. helping with context switches).

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