1492: Remove ability to, during runtime, set alt layout - it does not work. r=rmja a=rmja
I wasted yesterday trying to get this to work. It seems that erase operations does not work when in db1m mode. The erase operations, both bank and sector, runs and completes without any error flags being set. It also takes expected amount of time, but the flash is not actually erased.
I found [this](https://community.st.com/s/question/0D50X00009XkWrASAV/is-it-possilbe-to-checkand-may-be-writethe-db1m-option-byte-from-the-firmware-i-am-using-an-stmf4427ig-1mb-with-double-bank-via-db1m-option-byte) on the topic, at it seems that one have to reset the mcu for the change to take effect, so it does not make any sense to have it as runtime configurable.
Co-authored-by: Rasmus Melchior Jacobsen <rmja@laesoe.org>
1480: stm32: Async flash support for F4 r=rmja a=rmja
This PR depends on https://github.com/embassy-rs/embassy/pull/1478.
It adds async write/erase operations to the F4 series based on the work in https://github.com/embassy-rs/embassy/pull/870 but aligned to the new flash regions.
If one considers the entire `Flash` then nothing has changed other than the async operations have been added.
Co-authored-by: Rasmus Melchior Jacobsen <rmja@laesoe.org>
1487: rp: Implement embedded_hal::serial::Write for Uart/UartTx r=Dirbaio a=Alpha-3
Uart/UartTx currently implements `embedded_hal_02::serial::Read<u8>` and `embedded_hal_02::blocking::serial::Write<u8>` but not `embedded_hal_02::serial::Write<u8>`.
This implements the missing `embedded_hal_02::serial::Write<u8>` to allow use of Uart with crates that expect this interface, such as [defmt_serial](https://docs.rs/defmt-serial/latest/defmt_serial/).
Co-authored-by: Alpha3__0 <Alpha3.0gmail.com>
