esp-hal/esp32s2-hal/examples/embassy_hello_world.rs

#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]

use embassy_executor::Executor;
use embassy_time::{Duration, Timer};

use esp32s2_hal::{
    clock::ClockControl,
    prelude::*,
    timer::TimerGroup,
    Rtc, embassy, pac::Peripherals,
};
use esp_backtrace as _;
use xtensa_atomic_emulation_trap as _;
use static_cell::StaticCell;

#[embassy_executor::task]
async fn run1() {
    loop {
        esp_println::println!("Hello world from embassy using esp-hal-async!");
        Timer::after(Duration::from_millis(1_000)).await;
    }
}

#[embassy_executor::task]
async fn run2() {
    loop {
        esp_println::println!("Bing!");
        Timer::after(Duration::from_millis(5_000)).await;
    }
}

static EXECUTOR: StaticCell<Executor> = StaticCell::new();

#[xtensa_lx_rt::entry]
fn main() -> ! {
    esp_println::println!("Init!");
    let peripherals = Peripherals::take().unwrap();
    let system = peripherals.SYSTEM.split();
    let clocks = ClockControl::boot_defaults(system.clock_control).freeze();

    let mut rtc = Rtc::new(peripherals.RTC_CNTL);
    let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
    let mut wdt0 = timer_group0.wdt;
    let timer_group1 = TimerGroup::new(peripherals.TIMG1, &clocks);
    let mut wdt1 = timer_group1.wdt;

    // Disable watchdog timers
    rtc.rwdt.disable();
    wdt0.disable();
    wdt1.disable();

    #[cfg(feature = "embassy-time-timg0")]
    embassy::init(&clocks, timer_group0.timer0);

    let executor = EXECUTOR.init(Executor::new());
    executor.run(|spawner| {
        spawner.spawn(run1()).ok();
        spawner.spawn(run2()).ok();
    });
}

#[xtensa_lx_rt::exception]
fn exception(cause: xtensa_lx_rt::exception::ExceptionCause, frame: xtensa_lx_rt::exception::Context) {
    use esp_println::*;

    println!("\n\nException occured {:?} {:x?}", cause, frame);
    
    let backtrace = esp_backtrace::arch::backtrace();
    for b in backtrace.iter() {
        if let Some(addr) = b {
            println!("0x{:x}", addr)
        }
    }
}