Merge #494

494: Resoures take 2 r=korken89 a=korken89



Co-authored-by: Emil Fresk <emil.fresk@gmail.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/examples/shared.rs b/examples/shared.rs
new file mode 100644
index 00000000..c3fa07b9
--- /dev/null
+++ b/examples/shared.rs
@@ -0,0 +1,54 @@
+//! 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());
+    }
+}