rust-stm32f1xx-hal-zrymod-20210426/examples/delay.rs

//! "Blinky" using delays instead of a timer

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

extern crate cortex_m;
extern crate cortex_m_rt as rt;
extern crate panic_semihosting;
extern crate stm32f1xx_hal as hal;

use hal::delay::Delay;
use hal::prelude::*;
use hal::stm32f103xx;
use rt::{entry, exception, ExceptionFrame};

#[entry]
fn main() -> ! {
    let dp = stm32f103xx::Peripherals::take().unwrap();
    let cp = cortex_m::Peripherals::take().unwrap();

    let mut flash = dp.FLASH.constrain();
    let mut rcc = dp.RCC.constrain();

    let clocks = rcc.cfgr.freeze(&mut flash.acr);

    let mut gpioc = dp.GPIOC.split(&mut rcc.apb2);

    let mut led = gpioc.pc13.into_push_pull_output(&mut gpioc.crh);
    let mut delay = Delay::new(cp.SYST, clocks);

    loop {
        led.set_high();
        delay.delay_ms(1_000_u16);
        led.set_low();
        delay.delay_ms(1_000_u16);
    }
}

#[exception]
fn HardFault(ef: &ExceptionFrame) -> ! {
    panic!("{:#?}", ef);
}

#[exception]
fn DefaultHandler(irqn: i16) {
    panic!("Unhandled exception (IRQn = {})", irqn);
}