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traits: migrate Delay to embedded-hal 1.0+async, remove Rng and Flash.

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Dario Nieuwenhuis 2022-01-27 00:08:02 +01:00
parent d76cd5ceaf
commit 0719b05d63
32 changed files with 145 additions and 304 deletions
docs/modules/ROOT/pages
traits.adoc

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docs/modules/ROOT/pages/traits.adoc
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Embassy provides a set of traits and types specifically designed for `async` usage. Many of these futures will be upstreamed to the `embedded-hal` crate at some point in the future, probably when the required GAT (Generic Associated Types) feature is stabilized in Rust.
* `embassy::io`: `AsyncBufRead`, `AsyncWrite`. Traits for byte-stream IO, essentially `no_std` compatible versions of `futures::io`. The primary reason for re-defining these traits is that the `futures::io` variant requires `std::io::Error`, which does not work in the `no_std` environment.
* `embassy::traits`: Async traits for Flash, SPI, I2C, UART, RNG, GPIO and more.
* `embassy::time`: Time `Driver` trait that is implemented for different platforms. Time in Embassy is represented using the `Duration` and `Instant` types.
These traits are implemented by the platform-specific crates, such as `embassy-nrf` or `embassy-stm32`.