Merge pull request #205 from japaric/heterogeneous

rtfm-syntax refactor + heterogeneous multi-core support

1 files changed, 50 insertions, 0 deletions

diff --git a/examples/hardware.rs b/examples/hardware.rs
new file mode 100644
index 00000000..77f19d90
--- /dev/null
+++ b/examples/hardware.rs
@@ -0,0 +1,50 @@
+//! examples/hardware.rs
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+use cortex_m_semihosting::{debug, hprintln};
+use lm3s6965::Interrupt;
+use panic_semihosting as _;
+
+#[rtfm::app(device = lm3s6965)]
+const APP: () = {
+    #[init]
+    fn init(_: init::Context) {
+        // Pends the UART0 interrupt but its handler won't run until *after*
+        // `init` returns because interrupts are disabled
+        rtfm::pend(Interrupt::UART0); // equivalent to NVIC::pend
+
+        hprintln!("init").unwrap();
+    }
+
+    #[idle]
+    fn idle(_: idle::Context) -> ! {
+        // interrupts are enabled again; the `UART0` handler runs at this point
+
+        hprintln!("idle").unwrap();
+
+        rtfm::pend(Interrupt::UART0);
+
+        debug::exit(debug::EXIT_SUCCESS);
+
+        loop {}
+    }
+
+    #[task(binds = UART0)]
+    fn uart0(_: uart0::Context) {
+        static mut TIMES: u32 = 0;
+
+        // Safe access to local `static mut` variable
+        *TIMES += 1;
+
+        hprintln!(
+            "UART0 called {} time{}",
+            *TIMES,
+            if *TIMES > 1 { "s" } else { "" }
+        )
+        .unwrap();
+    }
+};