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-rw-r--r--examples/shared.rs54
1 files changed, 54 insertions, 0 deletions
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+//! examples/late.rs
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+use panic_semihosting as _;
+
+#[rtic::app(device = lm3s6965)]
+mod app {
+ use cortex_m_semihosting::{debug, hprintln};
+ use heapless::{
+ consts::*,
+ i,
+ spsc::{Consumer, Producer, Queue},
+ };
+ use lm3s6965::Interrupt;
+
+ #[shared]
+ struct Shared {
+ p: Producer<'static, u32, U4>,
+ c: Consumer<'static, u32, U4>,
+ }
+
+ #[local]
+ struct Local {}
+
+ #[init(local = [q: Queue<u32, U4> = Queue(i::Queue::new())])]
+ fn init(cx: init::Context) -> (Shared, Local, init::Monotonics) {
+ let (p, c) = cx.local.q.split();
+
+ // Initialization of shared resources
+ (Shared { p, c }, Local {}, init::Monotonics())
+ }
+
+ #[idle(shared = [c])]
+ fn idle(mut c: idle::Context) -> ! {
+ loop {
+ if let Some(byte) = c.shared.c.lock(|c| c.dequeue()) {
+ hprintln!("received message: {}", byte).unwrap();
+
+ debug::exit(debug::EXIT_SUCCESS);
+ } else {
+ rtic::pend(Interrupt::UART0);
+ }
+ }
+ }
+
+ #[task(binds = UART0, shared = [p])]
+ fn uart0(mut c: uart0::Context) {
+ c.shared.p.lock(|p| p.enqueue(42).unwrap());
+ }
+}