Hi all,
I am quite new to embedded rust and rust in general. I am currently implementing a serial driver on my own to get more used to it, while checking which traits to implement I got a bit confused about the relation between embedded-hal-nb::serial and embedded-io.
From my understanding:
- embedded-hal-nb is:
  - more "low level"
  - stable (v1.0)
  - usually implemented by the device hals (e.g. stm32h7xx-hal)
- embedded-io:
  - high level abstraction
  - not yet stable (V0.6)
  - not implemented by e.g. stm32h7xx-hal

I have seen that there is also a "embedded-io-adapters", I thought that this might provide an embedded-io implementation based on an embedded-hal-nb::serial implementation, but this does not seem to be the case (yet?).

That leads me to the following questions (I hope this is the right place to ask):
- Is it planned that the "embedded-io-adapters" will have such a default implementation in the future (=when stable)?
  - Or is this the completely wrong place to implement such a thing?
- Is there a good reason (apart from lack of time/resources) why a device hal should NOT implement the embedded-io traits for e.g. the uart?