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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 interleave 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, QEI0])]
mod app {
use cortex_m_semihosting::{debug, hprintln};
#[shared]
struct Shared {
a: u32,
b: u32,
}
#[local]
struct Local {}
#[init]
fn init(cx: init::Context) -> (Shared, Local) {
hprintln!("init").unwrap();
async_task1::spawn().ok();
async_task2::spawn().ok();
async_task3::spawn().ok();
async_task4::spawn().ok();
(Shared { a: 0, b: 0 }, Local {})
}
#[idle]
fn idle(_: idle::Context) -> ! {
loop {
hprintln!("idle");
debug::exit(debug::EXIT_SUCCESS);
}
}
#[task(priority = 1, shared = [a, b])]
async fn async_task1(mut cx: async_task1::Context) {
hprintln!(
"hello from async 1 a {}",
cx.shared.a.lock(|a| {
*a += 1;
*a
})
)
.ok();
}
#[task(priority = 1, shared = [a, b])]
async fn async_task2(mut cx: async_task2::Context) {
hprintln!(
"hello from async 2 a {}",
cx.shared.a.lock(|a| {
*a += 1;
*a
})
)
.ok();
}
#[task(priority = 2, shared = [a, b])]
async fn async_task3(mut cx: async_task3::Context) {
hprintln!(
"hello from async 3 a {}",
cx.shared.a.lock(|a| {
*a += 1;
*a
})
)
.ok();
}
#[task(priority = 2, shared = [a, b])]
async fn async_task4(mut cx: async_task4::Context) {
hprintln!(
"hello from async 4 a {}",
cx.shared.a.lock(|a| {
*a += 1;
*a
})
)
.ok();
}
}
|
