#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 = 0x11;             /* make PORTF0 PORTF4 CONFIGURABLE*/
    GPIO_PORTF_DEN_R = 0x1F;            /* set PORTF pins 5 pins*/
    GPIO_PORTF_DIR_R = 0x0E;            /* set PORTF0 PORTF4 pin as input user switch pin */
    GPIO_PORTF_PUR_R = 0x11;            /* PORTF4 PORT0 is pulled up */
    NVIC_EN0_R |= (1<<30);              //Starting NVIC as all the interrupt goes through it
    GPIO_PORTF_IM_R = 0x00;            /*Masking the ports*/
    GPIO_PORTF_IS_R = 0x00;
    GPIO_PORTF_IBE_R = 0x00;
    GPIO_PORTF_IEV_R = 0x00;            /*detects the falling edge of the switch*/
    GPIO_PORTF_ICR_R = 0x11;
    GPIO_PORTF_IM_R = 0x11;



while(1)
    {
    //GPIO_PORTF_DATA_R = 0x02;
    }
}

void GPIOIntHandler(void)
    {
    int i=0;
    for(i=0;i<1000;i++);
    if((GPIO_PORTF_DATA_R & 0x11)== 0x11){}
    else
    {
            GPIO_PORTF_DATA_R ^= 0x02;
    }
    GPIO_PORTF_ICR_R = 0x11;
    }