#![deny(unsafe_code)]
#![no_std]
#![no_main]
use panic_halt as _;
use nb::block;
use cortex_m_rt::entry;
use cortex_m_semihosting::hprintln;
use stm32f1xx_hal::{gpio::PinState, pac, prelude::*, timer::Timer};
#[entry]
fn main() -> ! {
let cp = cortex_m::Peripherals::take().unwrap();
let dp = pac::Peripherals::take().unwrap();
let mut flash = dp.FLASH.constrain();
let rcc = dp.RCC.constrain();
let clocks = rcc.cfgr.freeze(&mut flash.acr);
let mut gpioc = dp.GPIOC.split();
let mut pin = gpioc.pc13.into_floating_input(&mut gpioc.crh);
let mut timer = Timer::syst(cp.SYST, &clocks).counter_hz();
timer.start(1.Hz()).unwrap();
loop {
block!(timer.wait()).unwrap();
hprintln!("{}", pin.is_high());
pin.as_push_pull_output(&mut gpioc.crh, |out| {
out.set_high();
block!(timer.wait()).unwrap();
out.set_low();
block!(timer.wait()).unwrap();
});
pin.as_push_pull_output_with_state(&mut gpioc.crh, PinState::High, |out| {
block!(timer.wait()).unwrap();
out.set_low();
block!(timer.wait()).unwrap();
});
}
}