esp-hal/esp32h2-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 esp32h2_hal::{
    clock::ClockControl,
    peripherals::Peripherals,
    prelude::*,
    timer::TimerGroup,
    Rtc,
};
use esp_backtrace as _;
use esp_println::println;
use nb::block;

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

    let mut rtc = Rtc::new(peripherals.LP_CLKRST);
    let timer_group0 = TimerGroup::new(
        peripherals.TIMG0,
        &clocks,
        &mut system.peripheral_clock_control,
    );
    let mut timer0 = timer_group0.timer0;
    let mut wdt0 = timer_group0.wdt;
    let timer_group1 = TimerGroup::new(
        peripherals.TIMG1,
        &clocks,
        &mut system.peripheral_clock_control,
    );
    let mut wdt1 = timer_group1.wdt;

    // Disable watchdog timers
    rtc.swd.disable();
    rtc.rwdt.disable();
    wdt0.start(2u64.secs());
    wdt1.disable();

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

    loop {
        wdt0.feed();
        println!("Hello world!");
        block!(timer0.wait()).unwrap();
    }
}