This is the hello world program for the interrupt availability in the TM4C1294NCPDT microcontroller

TM4C1294NCPDT_Interrupt.c

#define GPIO_PORT_CGC_R         (*((volatile unsigned long *) 0x400FE608))

#define GPIO_PORTA_DIR_R        (*((volatile unsigned long *) 0x40058400))
#define GPIO_PORTA_IS_R         (*((volatile unsigned long *) 0x40058404))  /* Interrupt sense */
#define GPIO_PORTA_IBE_R        (*((volatile unsigned long *) 0x40058408))  /* Interrupt both edges */
#define GPIO_PORTA_IEV_R        (*((volatile unsigned long *) 0x4005840C))  /* Interrupt event */
#define GPIO_PORTA_IM_R         (*((volatile unsigned long *) 0x40058410))  /* Interrupt mask */
#define GPIO_PORTA_RIS_R        (*((volatile unsigned long *) 0x40058414))  /* Raw interrupt status */
#define GPIO_PORTA_MIS_R        (*((volatile unsigned long *) 0x40058418))  /* Masked interrupt status */
#define GPIO_PORTA_IC_R         (*((volatile unsigned long *) 0x4005841C))  /* Interrupt clear */
#define GPIO_PORTA_AFSEL_R      (*((volatile unsigned long *) 0x40058420))
#define GPIO_PORTA_DEN_R        (*((volatile unsigned long *) 0x4005851C))

#define GPIO_PORTA_DATA_R       (*((volatile unsigned long *) 0x40058080))  /* NOTE: Only PA5 can be written */

#define NVIC_EN0_R              (*((volatile unsigned long *) 0xE000E100))  /* Write to enable interrupt */
#define NVIC_DIS0_R             (*((volatile unsigned long *) 0xE000E180))  /* Write to disable interrupt */
#define NVIC_PEND0_R            (*((volatile unsigned long *) 0xE000E200))  /* Set pending interrupt */
#define NVIC_UNPEND0_R          (*((volatile unsigned long *) 0xE000E280))  /* Clear pending interrupt */
#define NVIC_ACTIVE0_R          (*((volatile unsigned long *) 0xE000E300))
#define NVIC_PRI0_R             (*((volatile unsigned long *) 0xE000E400))

#define SCB_APINT_R             (*((volatile unsigned long *) 0xE000ED0C))

void GPIOPortA_Handler(void)
{
    GPIO_PORTA_DATA_R ^= 0x20;          /* Toggle the LED attached at PA5 */
    GPIO_PORTA_IC_R |= 0x10;            /* Acknowledge the interrupt */
}

int main(void)
{
    GPIO_PORT_CGC_R |= 0x01;            /* Enable PORTA module */

    GPIO_PORTA_DIR_R &= ~0x10;          /* PA4 is an input pin */
    GPIO_PORTA_AFSEL_R &= ~0x10;        /* PA4 is not a special function pin */
    GPIO_PORTA_DEN_R |= 0x10;           /* PA4 is a digital pin */

    GPIO_PORTA_DIR_R |= 0x20;           /* PA5 is an output pin */
    GPIO_PORTA_AFSEL_R &= ~0x20;        /* PA5 is not a special function pin */
    GPIO_PORTA_DEN_R |= 0x20;           /* PA5 is a digital pin */

    GPIO_PORTA_IS_R &= ~0x10;           /* PA4 is edge sensitive */
    GPIO_PORTA_IBE_R &= ~0x10;          /* PA4 does not trigger on both edges (see GPIOIEV register) */
    GPIO_PORTA_IEV_R |= 0x10;           /* PA4 triggers an interrupt on the rising edge */
    GPIO_PORTA_IC_R |= 0x10;            /* Clear a pending interrupt for PA4. This is good practice */
    GPIO_PORTA_IM_R |= 0x10;            /* Interrupt triggered by PA4 are sent to the interrupt controller */

    SCB_APINT_R |= 0x05FA0400;          /* 3 bit group priority and no subpriority */

    NVIC_PRI0_R |= (0x01 << 5);         /* Interrupts triggered by PA4 have the priority #1 */
    NVIC_EN0_R |= 0x01;                 /* Enable interrupts for the GPIO PORTA module */

    while(1) {}

    return 0;
}

/* PA4 is input */
/* PA5 is output */