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async_util

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This commit is contained in:
Per Lindgren 2020-10-26 17:16:51 +01:00
parent 5df1f59f47
commit 5b1c0dbb0a
3 changed files with 15 additions and 4 deletions
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2
Cargo.toml
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@ -82,6 +82,8 @@ version = "0.5.2"
trybuild = "1" trybuild = "1"
[features] [features]
# experimental support for async/await
async = []
# used for testing this crate; do not use in applications # used for testing this crate; do not use in applications
__v7 =[] __v7 =[]
__min_r1_43 =[] __min_r1_43 =[]

10
examples/async_systick2.rs
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@ -91,8 +91,10 @@ mod app {
async fn task(mut cx: foo::Context<'static>) { async fn task(mut cx: foo::Context<'static>) {
hprintln!("foo task").ok(); hprintln!("foo task").ok();
hprintln!("delay long time").ok(); hprintln!("prepare two futures").ok();
timer_delay(&mut cx.resources.systick, 5000000).await; let d1 = timer_delay(&mut cx.resources.systick, 5000000);
let d2 = timer_delay(&mut cx.resources.systick, 1000000);
hprintln!("foo task resumed").ok(); hprintln!("foo task resumed").ok();
hprintln!("delay short time").ok(); hprintln!("delay short time").ok();
@ -182,6 +184,7 @@ impl<F: Future + 'static> Task<F> {
use core::cmp::Ordering; use core::cmp::Ordering;
use heapless::binary_heap::{BinaryHeap, Max}; use heapless::binary_heap::{BinaryHeap, Max};
use heapless::consts::U8; use heapless::consts::U8;
use heapless::Vec;
pub enum State { pub enum State {
Started, Started,
@ -217,7 +220,6 @@ pub struct Systick {
syst: cortex_m::peripheral::SYST, syst: cortex_m::peripheral::SYST,
state: State, state: State,
queue: BinaryHeap<Timeout, U8, Max>, queue: BinaryHeap<Timeout, U8, Max>,
// waker: Option<Waker>,
} }
//============= //=============
@ -260,7 +262,7 @@ impl<'a, T: Mutex<T = Systick>> Future for Timer<'a, T> {
fn timer_delay<'a, T: Mutex<T = Systick>>(systick: &'a mut T, t: u32) -> Timer<'a, T> { fn timer_delay<'a, T: Mutex<T = Systick>>(systick: &'a mut T, t: u32) -> Timer<'a, T> {
hprintln!("timer_delay {}", t); hprintln!("timer_delay {}", t);
Timer { Timer {
request: Some(t), request: heapless,
systick, systick,
} }
} }

7
src/lib.rs
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@ -34,9 +34,16 @@
#![deny(rust_2018_idioms)] #![deny(rust_2018_idioms)]
#![deny(warnings)] #![deny(warnings)]
#![no_std] #![no_std]
// async currently requires nightly
#![cfg_attr(feature = "async", feature(const_fn))]
#![cfg_attr(feature = "async", feature(type_alias_impl_trait))]
use core::ops::Sub; use core::ops::Sub;
// currently requires nightly
#[cfg(feature = "async")]
pub mod async_util;
use cortex_m::{ use cortex_m::{
interrupt::Nr, interrupt::Nr,
peripheral::{CBP, CPUID, DCB, DWT, FPB, FPU, ITM, MPU, NVIC, SCB, TPIU}, peripheral::{CBP, CPUID, DCB, DWT, FPB, FPU, ITM, MPU, NVIC, SCB, TPIU},