MRS-ZAD2

/* Includes */
#include <stddef.h>
#include "stm32f10x.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_tim.h"

volatile uint32_t millis;

void initGPIO(void);
void initTimer(void);
void SysTick_Handler(void);
void wait(uint32_t time);
void led(int32_t br);

int main(void) {
	//Varijabla u svrhu brojača
	volatile int32_t br=0;
	//Varijable u svrhu kontrole stanja tipkala
    volatile uint32_t con1=0,con2=0;

    //inizijalizacija
    initGPIO();
    initTimer();

    SysTick_Config(SystemCoreClock / 1000); // 1 ms
    //ciklicko ponavljanje
    led(br);
    while(1){
    	con1 = GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_5);
       	//Čitanje ulaza s tipkala spojena na pin B6
   		con2 = GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_6);
    	//Provjeravanje da li je tipkalo na pinu B5 stisnuto
    	if(con2==1 && con1==0){
    	  	//Povećavanje brojača
    	   	br++;
    	   	//Provjera da li je brojač veći od devet ako je vrati ga na nulu
    	    if(br>9) br=0;
    	    //Provjeravanje da li je tipkalo na pinu B6 stisnuto
    	}else if(con1==1 && con2==0){
    	  	//Smanjivanje brojača
    	   	br--;
    	   	//Provjera da li je brojač manji od 0 ako je vrati ga na devet
    	   	if(br<0) br=9;
    	}
    	//Pozivanja funkcije led da bi se pokazalo trenutno stanje brojača
    	led(br);
        wait(1000);
    }
}

void initGPIO(void) {
	//Deklariranje strukture
    GPIO_InitTypeDef GPIO_InitStructure;
	//Omogućuje pinove GPIOA i GPIOB
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
	    //Inicijalizacija izlaznih pinova
	    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_12 | GPIO_Pin_11 | GPIO_Pin_10;
	    //Postavljanje pinova od A0 do A3 te A10 do A12 da budu izlazni
	    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_Out_PP;
	    //Postavljanje brzine promjene logičke '0' u logičku '1'
	    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
	    //Definiranje da se radi o pinovima s oznakom A
	    GPIO_Init(GPIOA, &GPIO_InitStructure);
	    //Inicijalizacija ulaznih pinova
	    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_6 | GPIO_Pin_7;
	    //Postavljanje pinova B5 i B6 da budu ulazni
	    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_IN_FLOATING;
	    //Postavljanje brzine promjene logičke '0' u logičku '1'
	    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
	    //Definiranje da se radi o pinovima s oznakom B
	    GPIO_Init(GPIOB, &GPIO_InitStructure);
}

void initTimer(void) {
    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

    //inicijalizacija timera
    TIM_TimeBaseStructInit(&TIM_TimeBaseInitStruct);
    TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInitStruct.TIM_Period = 1000 - 1;
    TIM_TimeBaseInitStruct.TIM_Prescaler = SystemCoreClock / 100000 - 1; //100kHz
    TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1; //null
    TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0; //null
    TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStruct);

    TIM_Cmd(TIM2, ENABLE);
}

void wait(uint32_t time) {
    millis = time;
    while(millis > 0);
}

void SysTick_Handler(void) {
    if(millis > 0) {
        millis--;
    }
}

void led(int32_t br){
	switch(br){
	    	 case 0:
	          GPIOA->BRR = GPIO_Pin_0;// LED PIN_0 ON
	          GPIOA->BRR = GPIO_Pin_1;// LED PIN_1 ON
	          GPIOA->BRR = GPIO_Pin_2;// LED PIN_2 ON
	          GPIOA->BRR = GPIO_Pin_3;// LED PIN_3 ON
	          GPIOA->BSRR = GPIO_Pin_10;// LED PIN_10 OFF
	          GPIOA->BRR = GPIO_Pin_11;// LED PIN_11 ON
	          GPIOA->BRR = GPIO_Pin_12;// LED PIN_12 ON
	         break;
	    	 case 1:
	    	  GPIOA->BRR = GPIO_Pin_0;// LED PIN_0 ON
	          GPIOA->BSRR = GPIO_Pin_1;// LED PIN_1 ON
	          GPIOA->BSRR = GPIO_Pin_2;// LED PIN_2 OFF
	          GPIOA->BRR = GPIO_Pin_3;// LED PIN_3 OFF
	          GPIOA->BSRR = GPIO_Pin_10;// LED PIN_10 OFF
	          GPIOA->BSRR = GPIO_Pin_11;// LED PIN_11 OFF
	          GPIOA->BSRR = GPIO_Pin_12;// LED PIN_12 OFF
	     	 break;
	    	 case 2:
	       	  GPIOA->BRR = GPIO_Pin_0;// LED PIN_0 ON
	          GPIOA->BRR = GPIO_Pin_1;// LED PIN_1 OFF
	          GPIOA->BRR = GPIO_Pin_2;// LED PIN_2 ON
	          GPIOA->BSRR = GPIO_Pin_3;// LED PIN_3 ON
	          GPIOA->BRR = GPIO_Pin_10;// LED PIN_10 ON
	          GPIOA->BRR = GPIO_Pin_11;// LED PIN_11 ON
	          GPIOA->BSRR = GPIO_Pin_12;// LED PIN_12 OFF
	         break;
	    	 case 3:
	    	  GPIOA->BRR = GPIO_Pin_0;// LED PIN_0 ON
	          GPIOA->BSRR = GPIO_Pin_1;// LED PIN_1 ON
	          GPIOA->BRR = GPIO_Pin_2;// LED PIN_2 ON
	          GPIOA->BRR = GPIO_Pin_3;// LED PIN_3 OFF
	          GPIOA->BRR = GPIO_Pin_10;// LED PIN_10 ON
	          GPIOA->BRR = GPIO_Pin_11;// LED PIN_11 ON
	          GPIOA->BSRR = GPIO_Pin_12;// LED PIN_12 OFF
	         break;
	    	 case 4:
	    	  GPIOA->BRR = GPIO_Pin_0;// LED PIN_0 ON
	          GPIOA->BSRR = GPIO_Pin_1;// LED PIN_1 ON
	          GPIOA->BSRR = GPIO_Pin_2;// LED PIN_2 OFF
	    	  GPIOA->BRR = GPIO_Pin_3;// LED PIN_3 OFF
	          GPIOA->BRR = GPIO_Pin_10;// LED PIN_10 ON
	    	  GPIOA->BSRR = GPIO_Pin_11;// LED PIN_11 OFF
	    	  GPIOA->BRR = GPIO_Pin_12;// LED PIN_12 ON
	    	 break;
	    	 case 5:
	    	  GPIOA->BSRR = GPIO_Pin_0;// LED PIN_0 OFF
	          GPIOA->BSRR = GPIO_Pin_1;// LED PIN_1 ON
	          GPIOA->BRR = GPIO_Pin_2;// LED PIN_2 ON
	          GPIOA->BRR = GPIO_Pin_3;// LED PIN_3 OFF
	          GPIOA->BRR = GPIO_Pin_10;// LED PIN_10 ON
	          GPIOA->BRR = GPIO_Pin_11;// LED PIN_11 ON
	          GPIOA->BRR = GPIO_Pin_12;// LED PIN_12 ON
	    	 break;
	    	 case 6:
	    	  GPIOA->BSRR = GPIO_Pin_0;// LED PIN_0 OFF
	          GPIOA->BRR = GPIO_Pin_1;// LED PIN_1 ON
	          GPIOA->BRR = GPIO_Pin_2;// LED PIN_2 ON
	          GPIOA->BRR = GPIO_Pin_3;// LED PIN_3 ON
	          GPIOA->BRR = GPIO_Pin_10;// LED PIN_10 ON
	          GPIOA->BRR = GPIO_Pin_11;// LED PIN_11 ON
	          GPIOA->BRR = GPIO_Pin_12;// LED PIN_12 ON
	     	 break;
	    	 case 7:
	    	  GPIOA->BRR = GPIO_Pin_0;// LED PIN_0 ON
	    	  GPIOA->BSRR = GPIO_Pin_1;// LED PIN_1 ON
	          GPIOA->BSRR = GPIO_Pin_2;// LED PIN_2 OFF
	          GPIOA->BRR = GPIO_Pin_3;// LED PIN_3 OFF
	          GPIOA->BSRR = GPIO_Pin_10;// LED PIN_10 OFF
	          GPIOA->BRR = GPIO_Pin_11;// LED PIN_11 ON
	          GPIOA->BRR = GPIO_Pin_12;// LED PIN_12 ON
	    	 break;
	    	 case 8:
	    	  GPIOA->BRR = GPIO_Pin_0;// LED PIN_0 ON
	          GPIOA->BRR = GPIO_Pin_1;// LED PIN_1 ON
	          GPIOA->BRR = GPIO_Pin_2;// LED PIN_2 ON
	          GPIOA->BRR = GPIO_Pin_3;// LED PIN_3 ON
	          GPIOA->BRR = GPIO_Pin_10;// LED PIN_10 ON
	          GPIOA->BRR = GPIO_Pin_11;// LED PIN_11 ON
	          GPIOA->BRR = GPIO_Pin_12;// LED PIN_12 ON
	      	 break;
	    	 case 9:
	          GPIOA->BRR = GPIO_Pin_0;// LED PIN_0 ON
	          GPIOA->BSRR = GPIO_Pin_1;// LED PIN_1 ON
	          GPIOA->BRR = GPIO_Pin_2;// LED PIN_2 ON
	          GPIOA->BRR = GPIO_Pin_3;// LED PIN_3 OFF
	          GPIOA->BRR = GPIO_Pin_10;// LED PIN_10 ON
	          GPIOA->BRR = GPIO_Pin_11;// LED PIN_11 ON
	          GPIOA->BRR = GPIO_Pin_12;// LED PIN_12 ON
	         break;
	        }
}