//! Blinks an LED
//!
//! This assumes that a LED is connected to the pin assigned to `led`. (GPIO4)
#![no_std]
#![no_main]
use esp_backtrace as _;
use esp_println::println;
use hal::{
clock::ClockControl, gpio::IO, peripherals::Peripherals, prelude::*, timer::TimerGroup, Delay,
Rtc,
};
#[entry]
fn main() -> ! {
let peripherals = Peripherals::take();
let mut system = peripherals.DPORT.split();
let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
let timer_group0 = TimerGroup::new(
peripherals.TIMG0,
&clocks,
&mut system.peripheral_clock_control,
);
let mut wdt = timer_group0.wdt;
let mut rtc = Rtc::new(peripherals.RTC_CNTL);
// Disable MWDT and RWDT (Watchdog) flash boot protection
wdt.disable();
rtc.rwdt.disable();
// Set GPIO4 as an output, and set its state high initially.
let io = IO::new(peripherals.GPIO, peripherals.IO_MUX);
let mut led = io.pins.gpio4.into_push_pull_output();
led.set_high().unwrap();
// Initialize the Delay peripheral, and use it to toggle the LED state in a
// loop.
let mut delay = Delay::new(&clocks);
println!("Hello world!");
loop {
led.toggle().unwrap();
delay.delay_ms(500u32);
}
}