Hmmh. So, there is this line:

https://github.com/rtic-rs/rtic/blob/f8c95a13c77fcf7acecd1b0e1782a7b776d7e55c/rtic-monotonics/src/stm32.rs#L322

Which enforces `(tim_clock_hz % timer_hz) == 0`.

Hence, `tim_clock_hz` nust be be bigger or equal to `timer_hz`.

When I make `tim_clock_hz` `u32::MAX`, my timing is still off by three orders of magnitude, what should be a 10ms LED pulse takes multiple seconds.

If I lower `tim_clock_hz`, time get's worse (as in even slower). So it seems I cant make it work.