onyx/src/main.rs

#![no_std]
#![no_main]

// pick a panicking behavior
extern crate panic_halt; // you can put a breakpoint on `rust_begin_unwind` to catch panics
                         // extern crate panic_abort; // requires nightly
                         // extern crate panic_itm; // logs messages over ITM; requires ITM support
                         // extern crate panic_semihosting; // logs messages to the host stderr; requires a debugger

use metro_m0 as hal;

use hal::clock::GenericClockController;
use hal::delay::Delay;
use hal::entry;
use hal::pac::{CorePeripherals, Peripherals};
use hal::prelude::*;

#[entry]
fn main() -> ! {
    let mut peripherals = Peripherals::take().unwrap();
    let core = CorePeripherals::take().unwrap();
    let mut clocks = GenericClockController::with_external_32kosc(
        peripherals.GCLK,
        &mut peripherals.PM,
        &mut peripherals.SYSCTRL,
        &mut peripherals.NVMCTRL,
    );
    let mut pins = hal::Pins::new(peripherals.PORT);
    let mut red_led = pins.d13.into_push_pull_output(&mut pins.port);

    let mut delay = Delay::new(core.SYST, &mut clocks);
    loop {
        delay.delay_ms(1000u16);
        red_led.toggle();
    }
}