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#![no_main]
#![no_std]
use panic_halt as _;
use stm32f0xx_hal as hal;
use crate::hal::{adc::Adc, delay::Delay, pac, prelude::*};
use cortex_m::peripheral::Peripherals;
use cortex_m_rt::entry;
#[entry]
fn main() -> ! {
if let (Some(mut p), Some(cp)) = (pac::Peripherals::take(), Peripherals::take()) {
let mut rcc = p.RCC.configure().sysclk(8.mhz()).freeze(&mut p.FLASH);
let gpioa = p.GPIOA.split(&mut rcc);
let (mut led, mut an_in) = cortex_m::interrupt::free(move |cs| {
(
// (Re-)configure PA1 as output
gpioa.pa1.into_push_pull_output(cs),
// (Re-)configure PA0 as analog input
gpioa.pa0.into_analog(cs),
)
});
// Get delay provider
let mut delay = Delay::new(cp.SYST, &rcc);
// Get access to the ADC
let mut adc = Adc::new(p.ADC, &mut rcc);
loop {
led.toggle().ok();
let time: u16 = if let Ok(val) = adc.read(&mut an_in) as Result<u16, _> {
/* shift the value right by 3, same as divide by 8, reduces
the 0-4095 range into something approximating 1-512 */
(val >> 3) + 1
} else {
1000
};
delay.delay_ms(time);
}
}
loop {
continue;
}
}