esp-hal/esp32-hal/examples/watchdog.rs

//! This demos the watchdog timer.
//! Basically the same as `hello_world` but if you remove the call to
//! `wdt.feed()` the watchdog will reset the system.

#![no_std]
#![no_main]

use esp32_hal::{clock::ClockControl, pac::Peripherals, prelude::*, timer::TimerGroup, Rtc};
use esp_backtrace as _;
use esp_println::println;
use nb::block;
use xtensa_lx_rt::entry;

#[entry]
fn main() -> ! {
    let peripherals = Peripherals::take().unwrap();
    let system = peripherals.DPORT.split();
    let clocks = ClockControl::boot_defaults(system.clock_control).freeze();

    let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
    let mut timer0 = timer_group0.timer0;
    let mut wdt = timer_group0.wdt;
    let mut rtc = Rtc::new(peripherals.RTC_CNTL);

    rtc.rwdt.disable();

    wdt.start(2u64.secs());
    timer0.start(1u64.secs());

    loop {
        wdt.feed();
        println!("Hello world!");
        block!(timer0.wait()).unwrap();
    }
}