turn into a Cargo crate

examples/panic.rs

@@ -0,0 +1,35 @@
+//! Redirecting `panic!` messages
+//!
+//! The `cortex-m-rt` crate provides two options to redirect `panic!` messages
+//! through these two Cargo features:
+//!
+//! - `panic-over-semihosting`. `panic!` messages will be printed to the OpenOCD
+//!    console using semihosting. This is slow.
+//!
+//! - `panic-over-itm`. `panic!` messages will be send through the ITM port 0.
+//!   This is much faster but requires ITM support on the device.
+//!
+//! If neither of these options is specified then the `panic!` message will be
+//! lost. Note that all `panic!`s will trigger a debugger breakpoint.
+
+#![feature(used)]
+#![no_std]
+
+extern crate cortex_m;
+extern crate cortex_m_rt;
+
+use cortex_m::asm;
+
+fn main() {
+    panic!("Oops");
+}
+
+// As we are not using interrupts, we just register a dummy catch all handler
+#[allow(dead_code)]
+#[used]
+#[link_section = ".rodata.interrupts"]
+static INTERRUPTS: [extern "C" fn(); 240] = [default_handler; 240];
+
+extern "C" fn default_handler() {
+    asm::bkpt();
+}