add stm32 low level drivers

[rahmanih]

[github-actions[bot]]

Test Results

30 tests   30 :heavy_check_mark:  4m 57s :stopwatch: 10 suites    0 :zzz: 10 files      0 :x:

Results for commit e862d943.

[github-actions[bot]]

Package	Line Rate	Branch Rate	Health
default_build_coverage Package 1	65%	60%	➖
Summary	65% (1383 / 2126)	60% (651 / 1093)	➖

[rahmanih]

Hi @wickste,

Could you please review this PR?

regards Haithem.

[wickste]

Thank you @rahmanih - this looks good!

I will need to hold off on merging it for the moment as we are still finalizing the new development process. We need to make sure all new contributions are compliant with that process, so we can continue to obtain safety certification for this code base.

[rahmanih]

closing this PR, as it'll be merged in a separate repository