46 lines
1.3 KiB
Rust
46 lines
1.3 KiB
Rust
#![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));
|
|
}
|
|
}
|
|
}
|