#![no_main]
#![no_std]

use defmt_rtt as _; // global logger
//
use panic_probe as _;
use cortex_m_rt::entry;
use hal::{pac, prelude::*, rcc::Config};

#[entry]
fn main() -> ! {
    let dp = pac::Peripherals::take().unwrap();
    let cp = cortex_m::Peripherals::take().unwrap();

    let mut rcc = dp.RCC.freeze(Config::hsi16());

    let gpioa = dp.GPIOA.split(&mut rcc);
    let gpiob = dp.GPIOB.split(&mut rcc);

    let mut builtin_led = gpioa.pa5.into_push_pull_output();
    let mut led0 = gpiob.pb5.into_push_pull_output(); // D4
    let mut led1 = gpiob.pb4.into_push_pull_output(); // D5

    let mut delay = cp.SYST.delay(rcc.clocks);

    builtin_led.set_high().unwrap();
    led0.set_high().unwrap();
    led1.set_high().unwrap();

    loop {
        builtin_led.set_high().unwrap();
        led0.set_low().unwrap();
        led1.set_low().unwrap();
        delay.delay_ms(100_u16);

        led0.set_high().unwrap();
        delay.delay_ms(100_u16);

        builtin_led.set_low().unwrap();
        delay.delay_ms(100_u16);

        led0.set_low().unwrap();
        led1.set_high().unwrap();
        delay.delay_ms(100_u16);
    }
}