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

//! Blinks the LED on a Pico board
//!
//! This will blink an LED attached to GP25, which is the pin the Pico uses for the on-board LED.
#![no_std]
#![no_main]

use cortex_m_rt::entry;
use embedded_hal::digital::v2::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);
    let pins = pac
        .IO_BANK0
        .split(pac.PADS_BANK0, sio.gpio_bank0, &mut pac.RESETS);
    let mut led_pin = pins.gpio25.into_output();

    loop {
        led_pin.set_high().unwrap();
        // TODO: Replace with proper 1s delays once we have clocks working
        cortex_m::asm::delay(500_000);
        led_pin.set_low().unwrap();
        cortex_m::asm::delay(500_000);
    }
}