Merge #402

402: Extern task r=AfoHT a=perlindgren

Allows hardware and software task to be externally declared.

CI test, don't merge yet (squash needed).

Co-authored-by: Per Lindgren <per.lindgren@ltu.se>

2 files changed, 83 insertions, 0 deletions

diff --git a/examples/extern_binds.rs b/examples/extern_binds.rs
new file mode 100644
index 0000000..632f4ca
--- /dev/null
+++ b/examples/extern_binds.rs
@@ -0,0 +1,48 @@
+//! examples/extern_binds.rs
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+use cortex_m_semihosting::hprintln;
+use panic_semihosting as _;
+
+// Free function implementing the interrupt bound task `foo`.
+fn foo(_: app::foo::Context) {
+    hprintln!("foo called").ok();
+}
+
+#[rtic::app(device = lm3s6965)]
+mod app {
+    use crate::foo;
+    use cortex_m_semihosting::{debug, hprintln};
+    use lm3s6965::Interrupt;
+
+    #[init]
+    fn init(_: init::Context) -> init::LateResources {
+        rtic::pend(Interrupt::UART0);
+
+        hprintln!("init").unwrap();
+
+        init::LateResources {}
+    }
+
+    #[idle]
+    fn idle(_: idle::Context) -> ! {
+        hprintln!("idle").unwrap();
+
+        rtic::pend(Interrupt::UART0);
+
+        debug::exit(debug::EXIT_SUCCESS);
+
+        loop {
+            cortex_m::asm::nop();
+        }
+    }
+
+    extern "Rust" {
+        #[task(binds = UART0)]
+        fn foo(_: foo::Context);
+    }
+}
diff --git a/examples/extern_spawn.rs b/examples/extern_spawn.rs
new file mode 100644
index 0000000..1be3d51
--- /dev/null
+++ b/examples/extern_spawn.rs
@@ -0,0 +1,35 @@
+//! examples/extern_spawn.rs
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+use cortex_m_semihosting::{debug, hprintln};
+use panic_semihosting as _;
+
+// Free function implementing the spawnable task `foo`.
+fn foo(_c: app::foo::Context, x: i32, y: u32) {
+    hprintln!("foo {}, {}", x, y).unwrap();
+    if x == 2 {
+        debug::exit(debug::EXIT_SUCCESS);
+    }
+    app::foo::spawn(2, 3).unwrap();
+}
+
+#[rtic::app(device = lm3s6965, dispatchers = [SSI0])]
+mod app {
+    use crate::foo;
+
+    #[init]
+    fn init(_c: init::Context) -> init::LateResources {
+        foo::spawn(1, 2).unwrap();
+
+        init::LateResources {}
+    }
+
+    extern "Rust" {
+        #[task()]
+        fn foo(_c: foo::Context, _x: i32, _y: u32);
+    }
+}