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