rp-hal-boards/boards/arduino_nano_connect/examples/nano_blinky.rs
Wilfried Chauveau 42e929d7e1
Use rp2040-hal in all example (possibly through their bsp) (#423)
* Use rp2040-hal in all example (possibly through their bsp)

Some of the examples were using the cortex_m_rt::entry method which
misses the device specific spinlock re-initialisation.

This commits makes the usage more consistent by using rp2040_hal exported
macro as the only `entry` method used across examples.
2022-08-21 19:01:45 +01:00

93 lines
2.5 KiB
Rust

//! # Nano Blinky Example
//!
//! Blinks the LED on a Arduino Nano Connect board.
//!
//! This will blink an LED attached to GP25, which is the pin the Nano uses for
//! the on-board LED.
//!
//! See the `Cargo.toml` file for Copyright and license details.
#![no_std]
#![no_main]
use embedded_hal::digital::v2::OutputPin;
// // Time handling traits
use embedded_time::rate::*;
// Ensure we halt the program on panic (if we don't mention this crate it won't
// be linked)
use panic_halt as _;
use arduino_nano_connect as bsp;
// Pull in any important traits
use bsp::hal::prelude::*;
// A shorter alias for the Peripheral Access Crate, which provides low-level
// register access
use bsp::hal::pac;
// A shorter alias for the Hardware Abstraction Layer, which provides
// higher-level drivers.
use bsp::hal;
/// Entry point to our bare-metal application.
///
/// The `#[arduino_nano_connect::entry]` macro ensures the Cortex-M start-up code calls this function
/// as soon as all global variables and the spinlock are initialised.
///
/// The function configures the RP2040 peripherals, then blinks the LED in an
/// infinite loop.
#[arduino_nano_connect::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 = hal::Watchdog::new(pac.WATCHDOG);
// Configure the clocks
//
// The default is to generate a 125 MHz system clock
let clocks = hal::clocks::init_clocks_and_plls(
bsp::XOSC_CRYSTAL_FREQ,
pac.XOSC,
pac.CLOCKS,
pac.PLL_SYS,
pac.PLL_USB,
&mut pac.RESETS,
&mut watchdog,
)
.ok()
.unwrap();
// The delay object lets us wait for specified amounts of time (in
// milliseconds)
let mut delay = cortex_m::delay::Delay::new(core.SYST, clocks.system_clock.freq().integer());
// The single-cycle I/O block controls our GPIO pins
let sio = hal::Sio::new(pac.SIO);
// Set the pins up according to their function on this particular board
let pins = bsp::Pins::new(
pac.IO_BANK0,
pac.PADS_BANK0,
sio.gpio_bank0,
&mut pac.RESETS,
);
// Set the LED to be an output
let mut led_pin = pins.sck0.into_push_pull_output();
// Blink the LED at 1 Hz
loop {
led_pin.set_high().unwrap();
delay.delay_ms(500);
led_pin.set_low().unwrap();
delay.delay_ms(500);
}
}
// End of file