Have you thought about contributing to the https://github.com/japaric/stm32f30x-hal crate?

[Frederik-Baetens]

You need adc conversion and you seem to have implemented it by using the stm32f30x crate. But I think having all that abstracted in the stm32f30x-hal crate would be really helpful.

It would be nice if someone implemented those adc traits in the hal crate.

I'm currently trying to figure out how to do adc on the stm32f303 myself, when I figure it out, I will try to contribute to the hal crate.

Another question: is there a reason you use the stm32f30x crate instead of the stm32-rs crate ?