/
adafruit_metro_blinky.rs
84 lines (70 loc) · 2.09 KB
/
adafruit_metro_blinky.rs
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//! # GPIO 'Blinky' Example
//!
//! Blinks the LED on a Adafruit Metro RP2040 board
//!
//! It may need to be adapted to your particular board layout and/or pin assignment.
//!
//! See the `Cargo.toml` file for Copyright and license details.
#![no_std]
#![no_main]
// The macro for our start-up function
use adafruit_metro_rp2040::entry;
// Ensure we halt the program on panic (if we don't mention this crate it won't
// be linked)
use panic_halt as _;
// Some traits we need
use embedded_hal::digital::OutputPin;
use adafruit_metro_rp2040::{
hal::{
clocks::{init_clocks_and_plls, Clock},
pac,
sio::Sio,
watchdog::Watchdog,
},
Pins, XOSC_CRYSTAL_FREQ,
};
use cortex_m::delay::Delay;
/// Entry point to our bare-metal application.
///
/// The `#[entry]` macro ensures the Cortex-M start-up code calls this function
/// as soon as all global variables are initialised.
///
/// The function configures the RP2040 peripherals, then toggles a GPIO pin in
/// an infinite loop. If there is an LED connected to that pin, it will blink.
#[entry]
fn main() -> ! {
// Grab our singleton objects
let mut pac = pac::Peripherals::take().unwrap();
let core = pac::CorePeripherals::take().unwrap();
// Set up the watchdog driver - needed by the clock setup code
let mut watchdog = Watchdog::new(pac.WATCHDOG);
// Configure the clocks
let clocks = init_clocks_and_plls(
XOSC_CRYSTAL_FREQ,
pac.XOSC,
pac.CLOCKS,
pac.PLL_SYS,
pac.PLL_USB,
&mut pac.RESETS,
&mut watchdog,
)
.ok()
.unwrap();
let mut delay = Delay::new(core.SYST, clocks.system_clock.freq().to_Hz());
// The single-cycle I/O block controls our GPIO pins
let sio = Sio::new(pac.SIO);
let pins = Pins::new(
pac.IO_BANK0,
pac.PADS_BANK0,
sio.gpio_bank0,
&mut pac.RESETS,
);
let mut led_pin = pins.d13.into_push_pull_output();
loop {
led_pin.set_high().unwrap();
delay.delay_ms(500);
led_pin.set_low().unwrap();
delay.delay_ms(500);
}
}
// End of file