Monotonic trait confusion

[diggit]

Hi,
I'd like to implement custom monotonic using TIM3 on STM32H7. Ideally using HAL rather than PAC.
I am unsure which Monotonic trait to implement.
There is one in rtic-time (this - rtic repo) and another one in rtic-monotonic repo.
All the existing implementations I found (except those in rtic-monotonics in this repo) are implementing trait from rtic-monotonic repo.
Why there are 2 different definitions of same trait?

Please bear with me, I am total rust and rtic beginner.

My goal is to implement something like this for STM32H7
https://github.com/stm32-rs/stm32f4xx-hal/blob/master/src/timer/monotonic.rs

[burrbull]

I think you should implement both.
rtic-monotonic one is used in RTIC 1.x which works on stable.
rtic-tick is optimized for using with async an required by future RTIC 2.0

[burrbull]

Added extended 64-bit rtic-monotonic timer in f4xx-hal
stm32-rs/stm32f4xx-hal#640

@korken89 What should I change for rtic-time support?

[datdenkikniet]

I second the advice from burrbull.

Luckily the traits are almost identical, so it should not be very difficult to do a single implementation and #[cfg] the parts that aren't shared.

Closing because I think the question has been answered. Feel free to reopen if that's not the case.