#![no_main]
#![no_std]

use defmt::info;
use hal::pwr::PWR;
use hal::rtc::{Datelike, NaiveDateTime, Rtc, Timelike};
use panic_probe as _;

use defmt_rtt as _; // global logger

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();

    // Configure the clock.
    let mut rcc = dp.RCC.freeze(Config::hsi16());
    let pwr = PWR::new(dp.PWR, &mut rcc);

    let gpioa = dp.GPIOA.split(&mut rcc);
    let mut led = gpioa.pa5.into_push_pull_output();

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

    let mut rtc = Rtc::new(dp.RTC, &mut rcc, &pwr, None).unwrap(); // starts at time 0

    #[allow(clippy::never_loop)]
    loop {
        led.set_high().unwrap();
        delay.delay_ms(500_u16);

        led.set_low().unwrap();
        delay.delay_ms(500_u16);

        ptime(&mut rtc);
    }
}

fn ptime(rtc: &mut Rtc) {
    let time: NaiveDateTime = rtc.now();
    info!(
        "Time: {:04}-{:02}-{:02} {:02}:{:02}:{:02}",
        time.year(),
        time.month(),
        time.day(),
        time.hour(),
        time.minute(),
        time.second()
    )
}