1 files changed, 39 insertions, 0 deletions
diff --git a/examples/callback.rs b/examples/callback.rs
new file mode 100644
index 00000000..299c9410
--- /dev/null
+++ b/examples/callback.rs
@@ -0,0 +1,39 @@
+//! examples/callback.rs
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+use cortex_m_semihosting::{debug, hprintln};
+use panic_semihosting as _;
+
+#[rtic::app(device = lm3s6965, dispatchers = [SSI0])]
+mod app {
+    use super::*;
+    #[init()]
+    fn init(c: init::Context) -> (init::LateResources, init::Monotonics) {
+        hprintln!("init").unwrap();
+        driver(&bar::spawn);
+        foo::spawn(123).unwrap();
+        (init::LateResources {}, init::Monotonics())
+    }
+
+    #[task()]
+    fn foo(c: foo::Context, data: u32) {
+        hprintln!("foo {}", data).unwrap();
+        bar::spawn().unwrap();
+    }
+
+    #[task()]
+    fn bar(_c: bar::Context) {
+        hprintln!("bar").unwrap();
+
+        debug::exit(debug::EXIT_SUCCESS);
+    }
+}
+
+// some external code (e.g. driver)
+fn driver<E>(_callback: &dyn Fn() -> Result<(), E>) {
+    hprintln!("driver").unwrap();
+}