#include <stdint.h>
#include "tm4c123gh6pm.h"
//#include "emp_type.h"
#include "string.h"
#define SYSTICK_RELOAD_VALUE 80000 // 5 mS
#define NVIC_INT_CTRL_PEND_SYST   0x04000000  // Pend a systick int
#define NVIC_INT_CTRL_UNPEND_SYST 0x02000000  // Unpend a systick int
#define SYSTICK_PRIORITY    0x7E

static int a,b;
static int aa,or,sw,n,b,xd,i;
void SysTick_Handler(void)
{
a++;
//auto

if(a>=400)
{
	aa=1;
}

if(aa==1 && a>50)
{
	if(n>=0)aa=0;
	a=0;
	switch (i)
	            {
	            case 0:
	                GPIO_PORTF_DATA_R=0x00;
	                i++;
	                break;

	            case 1:
	                GPIO_PORTF_DATA_R=0x02;
	                break;

	            case 2:
	                GPIO_PORTF_DATA_R=0x04;
	                break;

	            case 3:
	                GPIO_PORTF_DATA_R=0x06;
	                break;

	            case 4:
	                GPIO_PORTF_DATA_R=0x08;
	                break;

	            case 5:
	                GPIO_PORTF_DATA_R=0x0A;
	                break;

	            case 6:
	                GPIO_PORTF_DATA_R=0x0C;
	                break;

	            case 7:
	                GPIO_PORTF_DATA_R=0x0E;
	                i=0;
	                break;
	            }
	            if (i!=0)i++;

}
if(0)
{
// counting buttons
//if (a>30 && b==1)
//{
//	n++;
//	xd=1;
//	a=0;
//}

//activating switfh
if(aa==0 && or==0)sw=1;

//activing order reverse
if(n==2)or==1;

//switch
if (sw==1 && b==1)
{
	if(GPIO_PORTF_DATA_R!=0x0E) //if it is at the end, goes to 0x00;
	{
		GPIO_PORTF_DATA_R=0x00;
	}
	else
	{
		GPIO_PORTF_DATA_R++; //next diode
	}
}

//reverse
if (or==1 && b==1)
{
	if(GPIO_PORTF_DATA_R!=0x00) //if it is at the end, goes to 0x0E;
	{
		GPIO_PORTF_DATA_R=0x0E;
	}
	else
	{
		GPIO_PORTF_DATA_R--; //next diode
	}
}
}
}

void enable_global_int()
{
  // enable interrupts.
  __asm("cpsie i");
}

void disable_global_int()
{
  // disable interrupts.
  __asm("cpsid i");
}


void SysTickInit()
{

  // Disable systick timer
  NVIC_ST_CTRL_R &= ~(NVIC_ST_CTRL_ENABLE);

  // Set current systick counter to reload value
  NVIC_ST_CURRENT_R = SYSTICK_RELOAD_VALUE;
  // Set Reload value, Systick reload register
  NVIC_ST_RELOAD_R = SYSTICK_RELOAD_VALUE;

  // NVIC systick setup, vector number 15
  // Clear pending systick interrupt request
  NVIC_INT_CTRL_R |= NVIC_INT_CTRL_UNPEND_SYST;

  // Set systick priority to 0x10, first clear then set.
  NVIC_SYS_PRI3_R &= ~(NVIC_SYS_PRI3_TICK_M);
  NVIC_SYS_PRI3_R |= (NVIC_SYS_PRI3_TICK_M & (SYSTICK_PRIORITY<<NVIC_SYS_PRI3_TICK_S));

  // Select systick clock source, Use core clock
  NVIC_ST_CTRL_R |= NVIC_ST_CTRL_CLK_SRC;

  // Enable systick interrupt
  NVIC_ST_CTRL_R |= NVIC_ST_CTRL_INTEN;

  // Enable and start timer
 NVIC_ST_CTRL_R |= NVIC_ST_CTRL_ENABLE;
}

void Reset()
{
	  // Disable systick timer
	  NVIC_ST_CTRL_R &= ~(NVIC_ST_CTRL_ENABLE);
	  // Set current systick counter to reload value
	  NVIC_ST_CURRENT_R = 0;
	  NVIC_ST_RELOAD_R = SYSTICK_RELOAD_VALUE;
	  NVIC_INT_CTRL_R |= NVIC_INT_CTRL_UNPEND_SYST;
	  NVIC_ST_CTRL_R |= NVIC_ST_CTRL_ENABLE;

}
void Off()
{
	// Disable systick timer
	NVIC_ST_CTRL_R &= ~(NVIC_ST_CTRL_ENABLE);

}



int main(void)
{
	enable_global_int();
	int dummy;
	SYSCTL_RCGC2_R = SYSCTL_RCGC2_GPIOF;

	dummy = SYSCTL_RCGC2_R;

	GPIO_PORTF_DIR_R=0x0E; //DDRA

	GPIO_PORTF_DEN_R=0x1E; //like PORTA

	GPIO_PORTF_LOCK_R = 0x4C4F434B;  // Unlock the CR register
	GPIO_PORTF_CR_R   = 0xFF;        // Enable overwrite of PUR to FP0

	GPIO_PORTF_PUR_R=0x10; //PULL UP HERE
	int i=0;

	aa=or=sw=n=b=xd=i=a=0;
	GPIO_PORTF_DATA_R=0x00;
	sw=1;
	//GPIO_PORTF_DATA_R=0xFF;
	SysTickInit();
	Off();

	while(1)
	{
		if (GPIO_PORTF_DATA_R & 0x10) //nie wciskam
		{
			if(aa==0)
			{
				Off();
				a=0;
			}
			b=0;
		}
		else //wciskam xd
		{

			if(b==0)
			{
				//n++;
				b=1;
				Reset();
			}
			//if(a>399)GPIO_PORTF_DATA_R=0x0E;
			//else
			//	GPIO_PORTF_DATA_R=0x02;


		//	if(xd==0)
		//	{
		//	b=1;
		//	}


		}
	}
	return(0);
}