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 hal::pac;
use hal::sio::Sio;
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use panic_halt as _;
use rp2040_hal as hal;
#[link_section = ".boot2"]
#[used]
pub static BOOT2: [u8; 256] = rp2040_boot2::BOOT_LOADER;
#[entry]
fn main() -> ! {
let mut pac = pac::Peripherals::take().unwrap();
let sio = Sio::new(pac.SIO);
let pins = hal::gpio::Pins::new(
pac.IO_BANK0,
pac.PADS_BANK0,
sio.gpio_bank0,
&mut pac.RESETS,
);
let mut led_pin = pins.gpio25.into_push_pull_output();
let button_pin = pins.gpio23.into_pull_down_input();
loop {
if button_pin.is_low().unwrap() {
led_pin.set_high().unwrap();
} else {
led_pin.set_low().unwrap();
}
}
}