stm32f0xx-hal/examples/blinky_timer.rs

#![no_main]
#![no_std]

use panic_halt as _;

use stm32f0xx_hal as hal;

use crate::hal::{prelude::*, stm32, time::Hertz, timers::*};

use cortex_m_rt::entry;

#[entry]
fn main() -> ! {
    if let Some(mut p) = stm32::Peripherals::take() {
        cortex_m::interrupt::free(move |cs| {
            let mut rcc = p.RCC.configure().sysclk(8.mhz()).freeze(&mut p.FLASH);

            let gpioa = p.GPIOA.split(&mut rcc);

            // (Re-)configure PA1 as output
            let mut led = gpioa.pa1.into_push_pull_output(cs);

            // Set up a timer expiring after 1s
            let mut timer = Timer::tim1(p.TIM1, Hertz(1), &mut rcc);

            loop {
                led.toggle().ok();

                // Wait for the timer to expire
                nb::block!(timer.wait()).ok();
            }
        });
    }

    loop {
        continue;
    }
}