C:
#include "main_base.h"

unsigned short int dioda();

int main(void) {
    // to jest jednorazowa konfiguracja
        RCC->AHB1ENR |= RCC_AHB1Periph_GPIOG;
        GPIOG->MODER |= GPIO_Mode_OUT << (14*2);// 1 - output
        GPIOG->OTYPER|= GPIO_OType_PP << 14;//0 - push-pull (def.)
        GPIOG->PUPDR |= GPIO_PuPd_NOPULL << (14*2);//0 - (default)
        RCC->AHB1ENR |= RCC_AHB1Periph_GPIOG;
        GPIOG->MODER |= GPIO_Mode_OUT << (13*2);// 1 - output
        GPIOG->OTYPER|= GPIO_OType_PP << 13;//0 - push-pull (def.)
        GPIOG->PUPDR |= GPIO_PuPd_NOPULL << (13*2);//0 - (default)
        RCC->AHB1ENR |= RCC_AHB1Periph_GPIOA;
        GPIOA->MODER |= GPIO_Mode_IN; // 0 - input (default)
        GPIOA->PUPDR |= GPIO_PuPd_NOPULL ; // 0 - (default)
    while (1) {
        GPIOG->BSRR = 0x80004000;   // dodany początek 0x8000 gaszący diodę PG14
        if(GPIOA->IDR&1)
            dioda();
    }
}