feather_m0 0.20.3

Board Support crate for the Adafruit Feather M0
Documentation 
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#![no_std]
#![no_main]

#[cfg(not(feature = "use_semihosting"))]
use panic_halt as _;
#[cfg(feature = "use_semihosting")]
use panic_semihosting as _;

use bsp::hal;
use bsp::pac;
use feather_m0 as bsp;

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

#[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 pins = bsp::Pins::new(peripherals.port);
    let mut red_led: bsp::RedLed = pin_alias!(pins.red_led).into();
    let mut delay = Delay::new(core.SYST, &mut clocks);
    loop {
        delay.delay_ms(200u8);
        red_led.set_high().unwrap();
        delay.delay_ms(200u8);
        red_led.set_low().unwrap();
    }
}