Microcontrôleurs

The cortex_m_rt crate provides (among other things) a reset handler for Cortex M microcontrollers.

#![no_main]
#![no_std]

extern crate panic_halt as _;

mod interrupts;

use cortex_m_rt::entry;

#[entry]
fn main() -> ! {
    loop {}
}

Next we’ll look at how to access peripherals, with increasing levels of abstraction.

The cortex_m_rt::entry macro requires that the function have type fn() -> !, because returning to the reset handler doesn’t make sense.
Run the example with cargo embed --bin minimal