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#![no_std]
#![no_main]
use pac::gpio::vals;
use {defmt_rtt as _, panic_probe as _, stm32_metapac as pac};
#[cortex_m_rt::entry]
fn main() -> ! {
// Enable GPIO clock
let rcc = pac::RCC;
rcc.ahb2enr().modify(|w| {
w.set_gpioben(true);
w.set_gpiocen(true);
});
rcc.ahb2rstr().modify(|w| {
w.set_gpiobrst(true);
w.set_gpiocrst(true);
w.set_gpiobrst(false);
w.set_gpiocrst(false);
});
// Setup button
let gpioc = pac::GPIOC;
const BUTTON_PIN: usize = 13;
gpioc.pupdr().modify(|w| w.set_pupdr(BUTTON_PIN, vals::Pupdr::PULL_UP));
gpioc.otyper().modify(|w| w.set_ot(BUTTON_PIN, vals::Ot::PUSH_PULL));
gpioc.moder().modify(|w| w.set_moder(BUTTON_PIN, vals::Moder::INPUT));
// Setup LED
let gpiob = pac::GPIOB;
const LED_PIN: usize = 14;
gpiob.pupdr().modify(|w| w.set_pupdr(LED_PIN, vals::Pupdr::FLOATING));
gpiob.otyper().modify(|w| w.set_ot(LED_PIN, vals::Ot::PUSH_PULL));
gpiob.moder().modify(|w| w.set_moder(LED_PIN, vals::Moder::OUTPUT));
// Main loop
loop {
if gpioc.idr().read().idr(BUTTON_PIN) == vals::Idr::LOW {
gpiob.bsrr().write(|w| w.set_bs(LED_PIN, true));
} else {
gpiob.bsrr().write(|w| w.set_br(LED_PIN, true));
}
}
}
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