Merge #97

97: v0.4.0 r=japaric a=japaric

closes #32
closes #33

Co-authored-by: Jorge Aparicio <jorge@japaric.io>

1 files changed, 43 insertions, 0 deletions

diff --git a/examples/periodic.rs b/examples/periodic.rs
new file mode 100644
index 0000000..0fb8bdf
--- /dev/null
+++ b/examples/periodic.rs
@@ -0,0 +1,43 @@
+//! examples/periodic.rs
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+extern crate panic_semihosting;
+
+use rtfm::{app, Instant};
+
+macro_rules! println {
+    ($($tt:tt)*) => {
+        if let Ok(mut stdout) = cortex_m_semihosting::hio::hstdout() {
+            use core::fmt::Write;
+
+            writeln!(stdout, $($tt)*).ok();
+        }
+    };
+}
+
+const PERIOD: u32 = 8_000_000;
+
+// NOTE: does NOT work on QEMU!
+#[app(device = lm3s6965)]
+const APP: () = {
+    #[init(schedule = [foo])]
+    fn init() {
+        schedule.foo(Instant::now() + PERIOD.cycles()).unwrap();
+    }
+
+    #[task(schedule = [foo])]
+    fn foo() {
+        let now = Instant::now();
+        println!("foo(scheduled = {:?}, now = {:?})", scheduled, now);
+
+        schedule.foo(scheduled + PERIOD.cycles()).unwrap();
+    }
+
+    extern "C" {
+        fn UART0();
+    }
+};