pwr: Add power configuration module #7
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richardeoin
approved these changes
Jun 9, 2024
src/pwr.rs
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| // ************************************ | ||
| // TODO: Warning! STM32H503 Errata 2.2.13 states that for Rev A, Z this transition should only | ||
| // be executed from RAM | ||
| // Move this function into RAM! |
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This is a pretty impressive errata! I wonder if any Rev A or Z hardware ever made it out into the wild? Assuming that current dev boards have revision Y parts on them, I wouldn't worry about it too much.
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Yeah, it's a fun one. I don't know whether Rev A or Z was ever released widely. It seems as though the dev boards that ST sells and the processors that I've used since Q3 2023 are Rev Y. I can probably just leave a note here, instead of a TODO, given how unlikely it seems that someone would actually run into this.
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The Power configuration module manages voltage scaling modes, which need to be set correctly based on power usage considerations, as well as desired clock speed. The blinky example incorporates the power module and demonstrates choosing a voltage scaling mode.