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-rw-r--r--examples/async-task.rs61
1 files changed, 61 insertions, 0 deletions
diff --git a/examples/async-task.rs b/examples/async-task.rs
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+#![no_main]
+#![no_std]
+#![feature(type_alias_impl_trait)]
+
+use panic_semihosting as _;
+
+// NOTES:
+//
+// - Async tasks cannot have `#[lock_free]` resources, as they can interleve and each async
+// task can have a mutable reference stored.
+// - Spawning an async task equates to it being polled once.
+
+#[rtic::app(device = lm3s6965, dispatchers = [SSI0, UART0], peripherals = true)]
+mod app {
+ use cortex_m_semihosting::{debug, hprintln};
+ use systick_monotonic::*;
+
+ #[shared]
+ struct Shared {}
+
+ #[local]
+ struct Local {}
+
+ #[monotonic(binds = SysTick, default = true)]
+ type MyMono = Systick<100>;
+
+ #[init]
+ fn init(cx: init::Context) -> (Shared, Local, init::Monotonics) {
+ hprintln!("init").unwrap();
+
+ normal_task::spawn().ok();
+ async_task::spawn().ok();
+
+ (
+ Shared {},
+ Local {},
+ init::Monotonics(Systick::new(cx.core.SYST, 12_000_000)),
+ )
+ }
+
+ #[idle]
+ fn idle(_: idle::Context) -> ! {
+ // debug::exit(debug::EXIT_SUCCESS);
+ loop {
+ // hprintln!("idle");
+ cortex_m::asm::wfi(); // put the MCU in sleep mode until interrupt occurs
+ }
+ }
+
+ #[task]
+ fn normal_task(_cx: normal_task::Context) {
+ hprintln!("hello from normal").ok();
+ }
+
+ #[task]
+ async fn async_task(_cx: async_task::Context) {
+ hprintln!("hello from async").ok();
+
+ debug::exit(debug::EXIT_SUCCESS);
+ }
+}