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, 61 insertions, 0 deletions

diff --git a/examples/baseline.rs b/examples/baseline.rs
new file mode 100644
index 0000000..73ef4c9
--- /dev/null
+++ b/examples/baseline.rs
@@ -0,0 +1,61 @@
+//! examples/baseline.rs
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+extern crate panic_semihosting;
+
+use cortex_m_semihosting::debug;
+use lm3s6965::Interrupt;
+use rtfm::app;
+
+macro_rules! println {
+    ($($tt:tt)*) => {
+        if let Ok(mut stdout) = cortex_m_semihosting::hio::hstdout() {
+            use core::fmt::Write;
+
+            writeln!(stdout, $($tt)*).ok();
+        }
+    };
+}
+
+// NOTE: does NOT properly work on QEMU
+#[app(device = lm3s6965)]
+const APP: () = {
+    #[init(spawn = [foo])]
+    fn init() {
+        println!("init(baseline = {:?})", start);
+
+        // `foo` inherits the baseline of `init`: `Instant(0)`
+        spawn.foo().unwrap();
+    }
+
+    #[task(schedule = [foo])]
+    fn foo() {
+        static mut ONCE: bool = true;
+
+        println!("foo(baseline = {:?})", scheduled);
+
+        if *ONCE {
+            *ONCE = false;
+
+            rtfm::pend(Interrupt::UART0);
+        } else {
+            debug::exit(debug::EXIT_SUCCESS);
+        }
+    }
+
+    #[interrupt(spawn = [foo])]
+    fn UART0() {
+        println!("UART0(baseline = {:?})", start);
+
+        // `foo` inherits the baseline of `UART0`: its `start` time
+        spawn.foo().unwrap();
+    }
+
+    extern "C" {
+        fn UART1();
+    }
+};