Merge #99

99: impl Mutex on all shared resources r=japaric a=japaric

document how to write generic code that operates on resources

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

1 files changed, 3 insertions, 13 deletions

diff --git a/examples/idle.rs b/examples/idle.rs
index 013ccce..1f21a37 100644
--- a/examples/idle.rs
+++ b/examples/idle.rs
@@ -7,24 +7,14 @@
 
 extern crate panic_semihosting;
 
-use cortex_m_semihosting::debug;
+use cortex_m_semihosting::{debug, hprintln};
 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();
-        }
-    };
-}
-
 #[app(device = lm3s6965)]
 const APP: () = {
     #[init]
     fn init() {
-        println!("init");
+        hprintln!("init").unwrap();
     }
 
     #[idle]
@@ -34,7 +24,7 @@ const APP: () = {
         // Safe access to local `static mut` variable
         let _x: &'static mut u32 = X;
 
-        println!("idle");
+        hprintln!("idle").unwrap();
 
         debug::exit(debug::EXIT_SUCCESS);