TM4C129ENCPDT: How to set the GPIO pin has input

In data sheet it has mention as Fast GPIO pin high input voltage Min -0.35*Vdd to Max - 4 . So input voltage to the GPIO pin was 3.25Volt  because it was within the range. Whether it is possible to detect the signal orelse i have give 4 v??. little bit doubt. Please clarify it.

Hi Sir,

Thank you so much for your reply... I understood the concept of voltage trigger. But in my code it is not trigger the interrupt. I don't know where i made the mistake.. 

/* 
*  ======== taAppCounterTaskFxn ========
*  This is a task function managed by tasks. It is used
*  to periodically check for the GPIO pins for TARGET / ACTUAL APPLICATION
*  increment and reset interrupts
*  The Task_sleep is determined by arg0 which
*
*  */

GPIO_PinConfig gpioPinConfigs[] = {
/* Input pins */ Board User switch interrupts
/* EK_TM4C129EXL_USR_SW1 */
GPIOTiva_PJ_0 | GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_RISING,
/* EK_TM4C129EXL_USR_SW2 */
GPIOTiva_PJ_1 | GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_RISING,

/* Output pins */
/* EK_TM4C129EXL_USR_D1 */
GPIOTiva_PN_1 | GPIO_CFG_OUT_STD | GPIO_CFG_OUT_STR_HIGH | GPIO_CFG_OUT_LOW,
/* EK_TM4C129EXL_USR_D2 */
GPIOTiva_PN_0 | GPIO_CFG_OUT_STD | GPIO_CFG_OUT_STR_HIGH | GPIO_CFG_OUT_LOW,

We Added 
* */

/* OUTPUT PINS */
/* EK_TM4C129EXL_PL1 */
GPIOTiva_PL_1 | GPIO_CFG_OUT_STD | GPIO_CFG_OUT_STR_HIGH | GPIO_CFG_OUT_LOW,
/* EK_TM4C129EXL_PL2 */
GPIOTiva_PL_2 | GPIO_CFG_OUT_STD | GPIO_CFG_OUT_STR_HIGH | GPIO_CFG_OUT_LOW,

/* INPUT PINS */ (interrupts)
/* EK_TM4C129EXL_PN2 */
GPIOTiva_PN_2 | GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_RISING, 
/* EK_TM4C129EXL_PN3 */
GPIOTiva_PN_3 | GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_RISING,

Void taAppCounterTaskFxn (UArg arg0, UArg arg1)
{
    while (1)
   {


       /* 2.1 */
       GPIO_setCallback(Board_COUNTER_RST, targetActualAppRstFxn); // We added 

       // Test call using the User switch button0
       //GPIO_setCallback(Board_BUTTON0, targetActualAppRstFxn);// board 

       /* Enable interrupts */
       GPIO_enableInt(Board_COUNTER_RST);//we added 
       //GPIO_enableInt(Board_BUTTON0); // board

       /* 2.2 */
       /* install Button callback */
       GPIO_setCallback(Board_COUNTER_INC, targetActualAppIncFxn);//we added 

       // Test call using the User switch button1
       //GPIO_setCallback(Board_BUTTON1, targetActualAppIncFxn);// board 

       /* Enable interrupts */
       GPIO_enableInt(Board_COUNTER_INC);//we added 
       //GPIO_enableInt(Board_BUTTON1);// board


       // Call this task once every 20ms or as specified for arg0 in main()
       Task_sleep((unsigned int)arg0);
   }
}

/*
*  ======== heartBeatTaskFxn ========
*  This is a task function managed by tasks. It is used
*  to periodically run the row scanning at specified number of clock ticks
*  based on the scanning requirements.
*  The Task_sleep is determined by arg0 which
*  is configured for the heartBeat Task instance.
*/
Void heartBeatTaskFxn(UArg arg0, UArg arg1)
{
   while (1)
   {
       System_printf(" hearBeatFxn running .. \n");
       /* SysMin will only print to the console when you call flush or exit */
       System_flush();


       // 1. Perform row Scanning and send data to LED driver via SPI
       ledDispRowScanFxn();


       // As all task functions are done, go to sleep
       Task_sleep((unsigned int)arg0);
       //GPIO_toggle(Board_LED0);
   }
}


/*
*  ======== main ========
*/
int main(void)
{
   Task_Handle taskHandle1;
   Task_Params taskParams1;
   Error_Block eb;
   Task_Handle taskHandle2;
   Task_Params taskParams2;

   /* Call board init functions */
   Board_initGeneral();
   Board_initGPIO();
   Board_initEMAC();
   Board_initSPI();

   System_printf(" Heart beat function task created\n");
   /* SysMin will only print to the console when you call flush or exit */
   System_flush();

   // Create the LED Displays Application task
   /* Init the Error_Block */
   Error_init(&eb);

   /* Create a task for heart beat fxn for display scanning purpose */
   /* Initialize the defaults and set the parameters. */
   Task_Params_init(&taskParams1);
   taskParams1.arg0 =1;
   taskParams1.stackSize = TASK_STACK_SIZE;
   taskParams1.priority = 15;
   taskHandle1 = Task_create((Task_FuncPtr)heartBeatTaskFxn, &taskParams1, &eb);
   if (taskHandle1 == NULL) {
       System_printf("Error: Failed to create new Task\n");
       /* SysMin will only print to the console when you call flush or exit */
       System_flush();
   }

   /* Create a task for TARGET/ACTUAL application specific counter INCREMENTS and RESET */
   /* Initialize the defaults and set the parameters. */
   Task_Params_init(&taskParams2);
   taskParams2.arg0 =200;
   taskParams2.stackSize = TASK_STACK_SIZE;
   taskParams2.priority = 10;
   taskHandle2 = Task_create((Task_FuncPtr)taAppCounterTaskFxn, &taskParams2, &eb);
   if (taskHandle2 == NULL) {
       System_printf("Error: Failed to create new Task\n");
       /* SysMin will only print to the console when you call flush or exit */
       System_flush();
   }


   /* Start BIOS */
   BIOS_start();

   return (0);
}