embassy/examples/nrf/src/bin/mutex.rs

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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
use defmt::{info, unwrap};
use embassy_executor::Spawner;
use embassy_time::{Duration, Timer};
use embassy_util::blocking_mutex::raw::ThreadModeRawMutex;
use embassy_util::mutex::Mutex;
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use {defmt_rtt as _, panic_probe as _};
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static MUTEX: Mutex<ThreadModeRawMutex, u32> = Mutex::new(0);
#[embassy_executor::task]
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async fn my_task() {
loop {
{
let mut m = MUTEX.lock().await;
info!("start long operation");
*m += 1000;
// Hold the mutex for a long time.
Timer::after(Duration::from_secs(1)).await;
info!("end long operation: count = {}", *m);
}
Timer::after(Duration::from_secs(1)).await;
}
}
#[embassy_executor::main]
async fn main(spawner: Spawner) {
let _p = embassy_nrf::init(Default::default());
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unwrap!(spawner.spawn(my_task()));
loop {
Timer::after(Duration::from_millis(300)).await;
let mut m = MUTEX.lock().await;
*m += 1;
info!("short operation: count = {}", *m);
}
}