#include "main.h"

#define RCC_AHB4ENR ((volatile uint32_t*)0x580244E0)

#define GPIOD_MODER ((volatile uint32_t*) 0x58020C00)
#define GPIOD_IDR ((volatile uint32_t*) 0x58020C10)
#define GPIOD_ODR ((volatile uint32_t*) 0x58020C14)

#define GPIOJ_MODER ((volatile uint32_t*) 0x58022400)
#define GPIOJ_IDR ((volatile uint32_t*) 0x58022410)
#define GPIOJ_ODR ((volatile uint32_t*) 0x58022414)

#define GPIOI_MODER ((volatile uint32_t*) 0x58022000)
#define GPIOI_IDR ((volatile uint32_t*) 0x58022010)
#define GPIOI_ODR ((volatile uint32_t*) 0x58022014)

#define GPIOC_MODER ((volatile uint32_t*) 0x58020800)
#define GPIOC_IDR ((volatile uint32_t*) 0x58020810)
#define GPIOC_ODR ((volatile uint32_t*) 0x58020814)


int main(void)
{
	// 1. prizgi uro naprave
	// GPIOD: postavi bit 3 v RCC_AHB4ENR, GPIOJ: postavi bit 9, GPIOI: postavi bit 8
	// GPIOC: postavi bit 2
	*RCC_AHB4ENR = *RCC_AHB4ENR | (1 << 2) | (1 << 3) | (1 << 9) | (1 << 8);

	// 2. nastavi pin na izhod
	//PD3: brisi bit 7, postavi bit 6
	*GPIOD_MODER = *GPIOD_MODER & ~(1 << 7);
	*GPIOD_MODER = *GPIOD_MODER | (1 << 6);
	//PJ2: brisi bit 5, postavi bit 4
	*GPIOJ_MODER = *GPIOJ_MODER & ~(1 << 5);
	*GPIOJ_MODER = *GPIOJ_MODER | (1 << 4);
	//PI13: brisi bit 27, postavili bit 26
	*GPIOI_MODER = *GPIOI_MODER & ~(1 << 27);
	*GPIOI_MODER = *GPIOI_MODER | (1 << 26);
	//PC13: brisi bita 26 in 27
	*GPIOC_MODER = *GPIOC_MODER & ~(1 << 27);
	*GPIOC_MODER = *GPIOC_MODER & ~(1 << 26);

	// ugasnemo vse 3 LED
	*GPIOI_ODR = *GPIOI_ODR | (1 << 13);
	*GPIOJ_ODR = *GPIOJ_ODR | (1 << 2);
	*GPIOD_ODR = *GPIOD_ODR & ~(1 << 3);

    while (1) {
    	// ali je gumb pritisnjen
    	// 13-ti bit v IDR
    	if (*GPIOC_IDR & (1 << 13)) {
        	// prizgi LED
        	*GPIOI_ODR = *GPIOI_ODR & ~(1 << 13);
        	for (volatile int i = 0; i < 500000; i++);
        	*GPIOJ_ODR = *GPIOJ_ODR & ~(1 << 2);
        	for (volatile int i = 0; i < 500000; i++);
        	*GPIOD_ODR = *GPIOD_ODR | (1 << 3);
        	for (volatile int i = 0; i < 500000; i++);

        	// ugasni LED
        	*GPIOI_ODR = *GPIOI_ODR | (1 << 13);
        	for (volatile int i = 0; i < 500000; i++);
        	*GPIOJ_ODR = *GPIOJ_ODR | (1 << 2);
        	for (volatile int i = 0; i < 500000; i++);
        	*GPIOD_ODR = *GPIOD_ODR & ~(1 << 3);
        	for (volatile int i = 0; i < 500000; i++);
    	}
    }
}