rp-hal-boards/rp2040-hal/examples/gpio_in_out.rs

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//! Toggle LED based on GPIO input
//!
//! This will control an LED on GP25 based on a button hooked up to GP15. The button should be tied
//! to ground, as the input pin is pulled high internally by this example. When the button is
//! pressed, the LED will turn off.
#![no_std]
#![no_main]
use cortex_m_rt::entry;
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use embedded_hal::digital::v2::{InputPin, OutputPin};
use panic_halt as _;
use rp2040_hal::prelude::*;
#[link_section = ".boot2"]
#[used]
pub static BOOT2: [u8; 256] = rp2040_boot2::BOOT_LOADER;
#[entry]
fn main() -> ! {
let mut pac = rp2040_pac::Peripherals::take().unwrap();
let sio = Sio::new(pac.SIO);
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let pins = pac
.IO_BANK0
.split(pac.PADS_BANK0, sio.gpio_bank0, &mut pac.RESETS);
let mut led_pin = pins.gpio25.into_output();
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let button_pin = pins.gpio15.into_input().pull_up();
loop {
if button_pin.is_high().unwrap() {
led_pin.set_high().unwrap();
} else {
led_pin.set_low().unwrap();
}
}
}