stm32/usart: Changing baud rate

[ra1u]

I would like to change uart baud at runtime.

Code seems to be in usart::configure and one needs to write appropriate value into brr reg

However I can not figure out how to access relevant initialisation values T::MULTIPLIER and T::frequency() because they are behind sealed (aka private) interface. Values are needed to calculate appropriate value for brr divisor .

Question is, how do I change brr register, accordingly.
Only idea I have so far is to set value relative to current value. So if baud needs to go from 57600 to 115200 one can divide current brr reg by 2,

Is there anything better?

[Dirbaio]

it's not implemented yet. The inner guts are intentionally not public, you're not supposed to touch registers directly if using the HAL. The fix would be to add a public .set_baudrate() method.

[EnmanuelParache]

Just opened #3512 adding .set_baudrate() method as mentioned above.