ral-registers - MMIO abstraction using a macro-based API

Age	Commit message (Collapse)	Author
2021-09-21	Mark all registers as transparent	Ian McIntyre
	Guarantees that the layout is the same as the inner type. Since UnsafeCell is also transparent, this ensures that the register has the same ABI as T. Today's registers work without this. Otherwise, RAL register blocks would have unaccounted offsets / wrong sizes. This is for completness, and a signal for others that a transmute might be OK. Requires Rust 1.28.
2021-08-15	Initial commit. Import `registers.rs` from stm32ral.	Adam Greig