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//! This example shows how async gpio can be used with a RP2040.
//!
//! The LED on the RP Pico W board is connected differently. See wifi_blinky.rs.
#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
use embassy_rp::gpio;
use embassy_time::{Duration, Timer};
use gpio::{Input, Level, Output, Pull};
use {defmt_rtt as _, panic_probe as _};
/// It requires an external signal to be manually triggered on PIN 16. For
/// example, this could be accomplished using an external power source with a
/// button so that it is possible to toggle the signal from low to high.
///
/// This example will begin with turning on the LED on the board and wait for a
/// high signal on PIN 16. Once the high event/signal occurs the program will
/// continue and turn off the LED, and then wait for 2 seconds before completing
/// the loop and starting over again.
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let p = embassy_rp::init(Default::default());
let mut led = Output::new(p.PIN_25, Level::Low);
let mut async_input = Input::new(p.PIN_16, Pull::None);
loop {
info!("wait_for_high. Turn on LED");
led.set_high();
async_input.wait_for_high().await;
info!("done wait_for_high. Turn off LED");
led.set_low();
Timer::after(Duration::from_secs(2)).await;
}
}
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