#include "stm32f4xx.h" /* tilz0R: HSE_VALUE je bil popravljen na 8000000 */

#include "STM32F4_Discovery.h"
#include <stm32f4xx_tim.h>
#include <stm32f4xx_rtc.h>


#define LEDS_GPIO_CLK       RCC_AHB1Periph_GPIOD     //v knjižnici e nekaj shranjeno pod imeno RCC_AHB1... mi damo svoje ime LED...
#define RED_LED             GPIO_Pin_14                 //imena so pobrana izknjižnic,tako so definirani pini
#define BLUE_LED            GPIO_Pin_15
#define ORANGE_LED          GPIO_Pin_13
#define GREEN_LED           GPIO_Pin_12
#define USER_BUTTON         GPIO_Pin_0                  //ime USER_BUTTON povežemo z pinom 0
#define ALL_EXTERNAL_LEDS   (RED_LED | BLUE_LED | ORANGE_LED | GREEN_LED);  //vsa imena shranimo v eno skupno spremenljivko
#define LEDS_GPIO_PORT      GPIOD
#define USER_BUTTON_PORT    GPIOA               //definicija za gumb
#define USER_BUTTON_CLK     RCC_AHB1Periph_GPIOA    //definicija da enablamo uro na portu A kjer je gumb

uint64_t TimerOverflow;

void Delayms(uint64_t ticks)  //simulacija delay funkcije
{
    /* tilz0R: spremenjen delay */
    TimerOverflow = 0;
    while(ticks > TimerOverflow);
}



void TIM7_IRQHandler(void)
{
    if(TIM_GetITStatus(TIM7, TIM_IT_Update) != RESET)
    {

        GPIO_ToggleBits(GPIOD, RED_LED);
        TimerOverflow++;

        TIM_ClearITPendingBit(TIM7, TIM_IT_Update);
    }
}


void EXTI0_IRQHandler(void) {
    if (EXTI_GetITStatus(EXTI_Line0) != RESET) {
        GPIO_ToggleBits(GPIOD, BLUE_LED);
        EXTI_ClearITPendingBit(EXTI_Line0);
    }
}




int main(void) {
    RCC_AHB1PeriphClockCmd (LEDS_GPIO_CLK, ENABLE);                 //na portu D enablamo uro
    RCC_AHB1PeriphClockCmd (USER_BUTTON_CLK, ENABLE);               //enablamo uro na portu kjer je gumb

    GPIO_InitTypeDef GPIO_InitStructure;                             //ocitno s tem komaj dolocimo, da lahko uporabljamo tiste funkcije

    GPIO_InitStructure.GPIO_Pin     =   ALL_EXTERNAL_LEDS;
    GPIO_InitStructure.GPIO_Mode    =   GPIO_Mode_OUT;
    GPIO_InitStructure.GPIO_OType   =   GPIO_OType_PP;
    GPIO_InitStructure.GPIO_Speed   =   GPIO_Speed_2MHz;
    GPIO_InitStructure.GPIO_PuPd    =   GPIO_PuPd_NOPULL;
    GPIO_Init(LEDS_GPIO_PORT, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin     =   USER_BUTTON;                    //inicializacija vhodne tipke
    GPIO_InitStructure.GPIO_Mode    =   GPIO_Mode_IN;
    GPIO_InitStructure.GPIO_PuPd    =   GPIO_PuPd_NOPULL;
    GPIO_Init(USER_BUTTON_PORT, &GPIO_InitStructure);



    //----------------INICIALIZACIJA PREKINITVE-----------------------
    SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);   //bi znali biti problemi z imeni porta

    EXTI_InitTypeDef EXTI_InitStructure;
    EXTI_InitStructure.EXTI_Line = EXTI_Line0;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);  //ta vrstica spremeni vredost v registru



    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);




    //------------------------INICIALIZACIJA CASOVNIKA--------------------
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM7, ENABLE);

    TIM_TimeBaseInitTypeDef TIM_Time_Base_Structure;
    RCC_ClocksTypeDef RCC_Clocks;

    /* tilz0R: Najprej je treba prebrati vrednosti, da bo RCC_Clocks postala veljavna! */
    RCC_GetClocksFreq(&RCC_Clocks);

/* tilz0R starts */
/*
 * PCLK1 = 42MHz, tvoj timer dela z frekvenco 84MHz
 *
 * Ti bi rad imel 1ms interrupte, torej mora biti prescaler * perioda = 84k
 *
 * Lahko narediš: prescaler = 84
 * Perioda = 1000
 *
 * */


    /* tilz0R ends */

    TIM_Time_Base_Structure.TIM_Period = 1000 - 1;
    TIM_Time_Base_Structure.TIM_Prescaler = 84 - 1;
    TIM_Time_Base_Structure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_Time_Base_Structure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM7, &TIM_Time_Base_Structure);

    TIM_Cmd(TIM7, ENABLE);


    //--------------------------DOLOCITEV, DA TIM7 IZVAJA INTERRRUPT------------
    NVIC_InitStructure.NVIC_IRQChannel = TIM7_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    TIM_ITConfig(TIM7, TIM_IT_Update, ENABLE);

    while(1) {
        GPIO_ToggleBits(LEDS_GPIO_PORT, GREEN_LED);                 //togla izhod
        Delayms(1000);

    }
}