53 lines
1.7 KiB
Rust
53 lines
1.7 KiB
Rust
//! This example shows how to use Watchdog in the RP2040 chip.
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//!
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//! It does not work with the RP Pico W board. See wifi_blinky.rs or connect external LED and resistor.
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#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use defmt::info;
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use embassy_executor::Spawner;
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use embassy_rp::gpio;
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use embassy_rp::watchdog::*;
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use embassy_time::{Duration, Timer};
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use gpio::{Level, Output};
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use {defmt_rtt as _, panic_probe as _};
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let p = embassy_rp::init(Default::default());
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info!("Hello world!");
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let mut watchdog = Watchdog::new(p.WATCHDOG);
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let mut led = Output::new(p.PIN_25, Level::Low);
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// Set the LED high for 2 seconds so we know when we're about to start the watchdog
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led.set_high();
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Timer::after(Duration::from_secs(2)).await;
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// Set to watchdog to reset if it's not fed within 1.05 seconds, and start it
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watchdog.start(Duration::from_millis(1_050));
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info!("Started the watchdog timer");
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// Blink once a second for 5 seconds, feed the watchdog timer once a second to avoid a reset
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for _ in 1..=5 {
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led.set_low();
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Timer::after(Duration::from_millis(500)).await;
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led.set_high();
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Timer::after(Duration::from_millis(500)).await;
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info!("Feeding watchdog");
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watchdog.feed();
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}
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info!("Stopped feeding, device will reset in 1.05 seconds");
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// Blink 10 times per second, not feeding the watchdog.
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// The processor should reset in 1.05 seconds.
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loop {
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led.set_low();
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Timer::after(Duration::from_millis(100)).await;
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led.set_high();
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Timer::after(Duration::from_millis(100)).await;
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}
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}
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