Feature request - ADC

[usbalbin]

Add support for the ADCx peripherals which are available on all devices, also including H523 and H533.

[astapleton]

@usbalbin I'm not going to be able to take this on the short-term, but I'm very happy to help you out and review contributions if you're willing to submit PRs for this.

[usbalbin]

No problem, sounds good! I am happy to give this a go in (hopefully not too distant) future, unless someone else gets to this first.

Thanks :)

BTW, anyone know if H5's ADC's are similar to that of any other family?

[astapleton]

Looks like a number of processors share the same ADC peripheral (see here). Notably, the H7 series does, and I've based a lot of my work on stm32h7xx-hal (although I've demacro-fied some of the drivers, taking inspiration from stm32f4xx-hal in order to do so). See the I2C PR (#27) for an example (ie. Instance trait, and usage of generics).