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//! This example shows how to send messages between the two cores in the RP2040 chip.
//!
//! The LED on the RP Pico W board is connected differently. See wifi_blinky.rs.
#![no_std]
#![no_main]
use defmt::*;
use embassy_executor::Executor;
use embassy_rp::gpio::{Level, Output};
use embassy_rp::multicore::{spawn_core1, Stack};
use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
use embassy_sync::channel::Channel;
use embassy_time::Timer;
use static_cell::StaticCell;
use {defmt_rtt as _, panic_probe as _};
static mut CORE1_STACK: Stack<4096> = Stack::new();
static EXECUTOR0: StaticCell<Executor> = StaticCell::new();
static EXECUTOR1: StaticCell<Executor> = StaticCell::new();
static CHANNEL: Channel<CriticalSectionRawMutex, LedState, 1> = Channel::new();
enum LedState {
On,
Off,
}
#[cortex_m_rt::entry]
fn main() -> ! {
let p = embassy_rp::init(Default::default());
let led = Output::new(p.PIN_25, Level::Low);
spawn_core1(
p.CORE1,
unsafe { &mut *core::ptr::addr_of_mut!(CORE1_STACK) },
move || {
let executor1 = EXECUTOR1.init(Executor::new());
executor1.run(|spawner| spawner.spawn(unwrap!(core1_task(led))));
},
);
let executor0 = EXECUTOR0.init(Executor::new());
executor0.run(|spawner| spawner.spawn(unwrap!(core0_task())));
}
#[embassy_executor::task]
async fn core0_task() {
info!("Hello from core 0");
loop {
CHANNEL.send(LedState::On).await;
Timer::after_millis(100).await;
CHANNEL.send(LedState::Off).await;
Timer::after_millis(400).await;
}
}
#[embassy_executor::task]
async fn core1_task(mut led: Output<'static>) {
info!("Hello from core 1");
loop {
match CHANNEL.receive().await {
LedState::On => led.set_high(),
LedState::Off => led.set_low(),
}
}
}
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