#include <stdint.h>
#include <stdbool.h>
#include "tm4c123gh6pm.h"

int main(void)
{
    SYSCTL_RCGC2_R |= 0x00000020;       /* enable clock to GPIOF */
    GPIO_PORTF_LOCK_R = 0x4C4F434B;     /* unlock commit register */
    GPIO_PORTF_CR_R = 0x1F;             /* make PORTF0 configurable */
    GPIO_PORTF_DEN_R = 0x1E;            /* set PORTF pins 4 pin */
    GPIO_PORTF_DIR_R = 0x0E;            /* set PORTF4 pin as input user switch pin */
    GPIO_PORTF_PUR_R = 0x10;            /* PORTF4 is pulled up */


   long int x;

   while(1)
   {
       //TURN ON LED
       x=0;
       GPIO_PORTF_DATA_R = 0x02;
       //WAIT FOR 500ms
       while(x<667750)
           x++;

       //TURN OFF LED
       x=0;
       GPIO_PORTF_DATA_R = 0x00;
       //WAIT FOR 500ms
       while(x<667750)
                  x++;


   }
}