#![no_std]
#![no_main]

extern crate alloc;
use esp32s3_hal::{clock::ClockControl, pac::Peripherals, prelude::*, timer::TimerGroup, Rtc};
use esp_backtrace as _;
#[global_allocator]
static ALLOCATOR: esp_alloc::EspHeap = esp_alloc::EspHeap::empty();

fn init_heap() {
    const HEAP_SIZE: usize = 32 * 1024;

    extern "C" {
        static mut _heap_start: u32;
        static mut _heap_end: u32;
    }

    unsafe {
        let heap_start = &_heap_start as *const _ as usize;
        let heap_end = &_heap_end as *const _ as usize;
        assert!(
            heap_end - heap_start > HEAP_SIZE,
            "Not enough available heap memory."
        );
        ALLOCATOR.init(heap_start as *mut u8, HEAP_SIZE);
    }
}
#[xtensa_lx_rt::entry]
fn main() -> ! {
    let peripherals = Peripherals::take().unwrap();
    let system = peripherals.SYSTEM.split();
    let clocks = ClockControl::boot_defaults(system.clock_control).freeze();

    // Disable the RTC and TIMG watchdog timers
    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;

    rtc.rwdt.disable();
    wdt0.disable();
    wdt1.disable();
    esp_println::println!("Hello World!");

    loop {}
}