Merge #613

613: Rust stable support r=Dirbaio a=Dirbaio

This PR adds (limited) stable Rust support!

The drawbacks are: 

- No `#[embassy::task]`, `#[embassy::main]`. (requires `type_alias_impl_trait`). You have to manually allocate the tasks somewhere they'll live forever. See [example](https://github.com/embassy-rs/embassy/blob/master/examples/nrf/src/bin/raw_spawn.rs)
- No async trait impls (requires GATs). Note that the full API surface of HALs is still available through inherent methods: #552 #581 
- Some stuff is not constructible in const (requires `const_fn_trait_bound`), although there's an (ugly) workaround for the generic `Mutex`.

So it's not that bad in the end, it's fully usable for shipping production-ready firmwares. We'll still recommend nightly as the default, until GATs and `type_alias_impl_trait` are stable.

Co-authored-by: Dario Nieuwenhuis <[email protected]>

1 files changed, 2 insertions, 2 deletions

diff --git a/docs/modules/ROOT/examples/basic/Cargo.toml b/docs/modules/ROOT/examples/basic/Cargo.toml
index 0f1c30da3..ed1c3cb1c 100644
--- a/docs/modules/ROOT/examples/basic/Cargo.toml
+++ b/docs/modules/ROOT/examples/basic/Cargo.toml
@@ -5,8 +5,8 @@ name = "embassy-basic-example"
 version = "0.1.0"
 
 [dependencies]
-embassy = { version = "0.1.0", path = "../../../../../embassy", features = ["defmt"] }
-embassy-nrf = { version = "0.1.0", path = "../../../../../embassy-nrf", features = ["defmt", "nrf52840", "time-driver-rtc1", "gpiote"] }
+embassy = { version = "0.1.0", path = "../../../../../embassy", features = ["defmt", "nightly"] }
+embassy-nrf = { version = "0.1.0", path = "../../../../../embassy-nrf", features = ["defmt", "nrf52840", "time-driver-rtc1", "gpiote", "nightly"] }
 
 defmt = "0.3"
 defmt-rtt = "0.3"