This is a `core` patch to make wakers 1 word (the task pointer) instead of 2 (task pointer + vtable). It allows having the "waker optimization" we had a while back on `WakerRegistration/AtomicWaker`, but EVERYWHERE, without patching all crates.
Advantages:
- Less memory usage.
- Faster.
- `AtomicWaker` can actually use atomics to load/store the waker, No critical section needed.
- No `dyn` call, which means `cargo-call-stack` can now see through wakes.
Disadvantages:
- You have to patch `core`...
- Breaks all executors and other things that create wakers, unless they opt in to using the new `from_ptr` API.
How to use:
- Run this shell script to patch `core`. https://gist.github.com/Dirbaio/c67da7cf318515181539122c9d32b395
- Enable `build-std`
- Enable `build-std-features = core/turbowakers`
- Enable feature `turbowakers` in `embassy-executor`, `embassy-sync`.
- Make sure you have no other crate creating wakers other than `embassy-executor`. These will panic at runtime.
Note that the patched `core` is equivalent to the unpached one when the `turbowakers` feature is not enabled, so it should be fine to leave it there.
1294: Add support for `QSPI` in `stm32` r=Dirbaio a=Mirror0
Implemented with help of Tomasz Grześ <tomasz.grzes@gmail.com>.
Tested only on stm32f777zi.
Co-authored-by: Mateusz Butkiewicz <mateusz@github.butkiewicz.dev>
1299: sync/pipe: update to clarify docs that it is byte-oriented. r=Dirbaio a=Dirbaio
There was some language copypasted from Channel talking about "messages" or "values", that is not really accurate with Pipe.
bors r+
Co-authored-by: Dario Nieuwenhuis <dirbaio@dirbaio.net>
1287: stm32: use stm32-metapac from crates.io, remove stm32-data submodule. r=Dirbaio a=Dirbaio
- `embassy-stm32` uses `stm32-metapac` from `crates.io`.
- Remove `stm32-data` submodule.
- Remove `stm32-metapac`, `stm32-metapac-gen`. These are now in the `stm32-data` repo.
- Remove `stm32-gen-features`, since it used `stm32-data` directly.
- The feature list in `stm32-metapac` is generated by `stm32-metapac-gen` now.
- The feature list in `embassy-stm32` can be updated by hand by copypasting from `stm32-metapac`'s `Cargo.toml`. We can add a script to do this automatically later if that's too annoying.
- Remove outdated `xtask` scripts that no longer work. Not needed anymore, you can run CI locally by doing `./ci.sh`.
Co-authored-by: Dario Nieuwenhuis <dirbaio@dirbaio.net>
1274: Example using the PIO to drive WS2812 aka Neopixel RGB leds r=Dirbaio a=CBJamo
This example also uses a pio program compiled at runtime, rather than one built at compile time. There's no reason to do that, but it's probably useful to have an example that does this as well.
Co-authored-by: Caleb Jamison <Caleb@hellbender.com>
1277: (embassy-rp): Allow upgrading a blocking uart to a BufferedUart r=MathiasKoch a=MathiasKoch
Also implement blocking embedded-nal serial traits for BufferedUart
Co-authored-by: Mathias <mk@blackbird.online>
This example also uses a pio program compiled at runtime, rather than one built at compile time. There's no reason to do that, but it's probably useful to have an example that does this as well.
1264: Add multicast to udp socket r=Dirbaio a=28Smiles
This should make it possible to implement mDNS for embassy-net, which in turn is essential for smart home
Co-authored-by: Leon Camus <leon.c@gmx.de>
Co-authored-by: 28Smiles <Leon.c@gmx.de>
