diff --git a/examples/async-infinite-loop.rs b/examples/async-infinite-loop.rs new file mode 100644 index 0000000000..602387b6ca --- /dev/null +++ b/examples/async-infinite-loop.rs @@ -0,0 +1,57 @@ +#![no_main] +#![no_std] +#![feature(type_alias_impl_trait)] + +use panic_semihosting as _; + +#[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(); + + foo::spawn().ok(); + + ( + Shared {}, + Local {}, + init::Monotonics(Systick::new(cx.core.SYST, 12_000_000)), + ) + } + + #[idle] + fn idle(_: idle::Context) -> ! { + loop { + cortex_m::asm::wfi(); // put the MCU in sleep mode until interrupt occurs + } + } + + // Infinite loops are not allowed in RTIC, however in async tasks they are - in there is an + // await inside the loop. + #[task] + async fn foo(_cx: foo::Context) { + let mut i = 0; + loop { + if i == 5 { + debug::exit(debug::EXIT_SUCCESS); + } + + hprintln!("hello from async {}", i).ok(); + monotonics::delay(100.millis()).await; // This makes it okey! + + i += 1; + } + } +}