stm32g0xx-hal 0.2.0

#![deny(warnings)]
#![deny(unsafe_code)]
#![no_main]
#![no_std]

extern crate cortex_m;
extern crate cortex_m_rt as rt;
extern crate panic_halt;
extern crate stm32g0xx_hal as hal;

use hal::prelude::*;
use hal::stm32;
use rt::entry;

#[entry]
fn main() -> ! {
    let dp = stm32::Peripherals::take().expect("cannot take peripherals");
    let cp = cortex_m::Peripherals::take().expect("cannot take core peripherals");

    let mut rcc = dp.RCC.constrain();
    let mut delay = cp.SYST.delay(&mut rcc);

    let gpioc = dp.GPIOC.split(&mut rcc);
    let button = gpioc.pc13.into_pull_up_input();

    let gpioa = dp.GPIOA.split(&mut rcc);
    let mut led = gpioa.pa5.into_push_pull_output();

    loop {
        let wait = match button.is_high() {
            Ok(true) => 300.millis(),
            Ok(false) => 100.millis(),
            _ => unreachable!(),
        };
        delay.delay(wait);
        led.toggle().unwrap();
    }
}