bare1.rs

//! bare1.rs
//! Simple bare metal application

// feature to ensure symbols to be linked
#![feature(used)]
// build without the Rust standard library
#![no_std]

// API to the ARM Cortex M Peripherals
//extern crate cortex_m;

// Minimal runtime / startup for Cortex-M microcontrollers
extern crate cortex_m_rt;

// Convenient tracing over semihosting and ITM
// #[macro_use]
// extern crate cortex_m_debug;

#[inline(never)]
fn main() {
    // ITM trace (fast)
    // start `itmdump` before `openocd`
    // ipln!("ITM: Hello World");

    // semihosting trace (slow)
    // sprintln!("SEMIHOSTING: Hello World");

    // to prevent returning
    loop {
        // cortex_m::asm::nop();
    }
}

// As we are not using interrupts, we just register a dummy catch all handler
#[link_section = ".vector_table.interrupts"]
#[used]
static INTERRUPTS: [extern "C" fn(); 240] = [default_handler; 240];

extern "C" fn default_handler() {
    // cortex_m::asm::bkpt();
}