STM32: fix HRTIM pwm init and corner case#31

Merged

facchinm merged 3 commits intoarduino:extrapatches-6.17.0from

leonardocavagnis:pwm_fix_stm

Sep 29, 2023

Commits on Sep 27, 2023

Commits on Sep 28, 2023

STM32: add helper fun to manage pwmout obj period
leonardocavagnis
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