update examples and docs

src/examples/_3_panic.rs

@@ -0,0 +1,49 @@
+//! Changing the panic handler
+//!
+//! The easiest way to change the panic handler is to use a different [panic implementation
+//! crate][0].
+//!
+//! [0]: https://crates.io/keywords/panic-impl
+//!
+//! ---
+//!
+//! ```
+//! 
+//! #![no_main]
+//! #![no_std]
+//! 
+//! extern crate cortex_m;
+//! #[macro_use]
+//! extern crate cortex_m_rt as rt;
+//! // extern crate panic_abort;
+//! extern crate panic_semihosting; // reports panic messages to the host stderr using semihosting
+//! 
+//! use cortex_m::asm;
+//! use rt::ExceptionFrame;
+//! 
+//! main!(main);
+//! 
+//! #[inline(always)]
+//! fn main() -> ! {
+//!     panic!("Oops")
+//! }
+//! 
+//! exception!(DefaultHandler, deh);
+//! 
+//! #[inline(always)]
+//! fn deh(_nr: u8) {
+//!     asm::bkpt();
+//! }
+//! 
+//! exception!(HardFault, hf);
+//! 
+//! #[inline(always)]
+//! fn hf(_ef: &ExceptionFrame) -> ! {
+//!     asm::bkpt();
+//! 
+//!     loop {}
+//! }
+//! 
+//! interrupts!(DefaultHandler);
+//! ```
+// Auto-generated. Do not modify.