#![no_std]
#![no_main]

use cortex_m_rt::entry;
use defmt::info;
use nb::block;
use stm32f1xx_hal::{pac, prelude::*, timer::Timer};
use {defmt_rtt as _, panic_probe as _};

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

    let mut rcc = dp.RCC.constrain();
    let mut gpioa = dp.GPIOA.split(&mut rcc);

    // TODO: Button wiring: PA0 -> button -> GND

    let mut timer = Timer::syst(cp.SYST, &rcc.clocks).counter_hz();
    timer.start(40.Hz()).unwrap();

    let mut last_pressed = false;

    loop {
        
        // TODO: get the current button status
        // TODO: print a message when the button is pressed and released

        // Poll at 25ms to avoid too much log spam.
        block!(timer.wait()).unwrap();
    }
}