CCS/EK-TM4C1294XL: GPIO Interrupts not compiling

Tool/software: Code Composer Studio

I am trying to setup a GPIO interrupt triggering on a high level to detect a keypad button press.  I am using the EK-TM4C1294XL.  All the ports that have 8 pins available are being used for something else.  A code snippet is contained below.  What am I doing wrong that I am not seeing.  The debugger does not get past the line "GPIOIntTypeSet(rowPort, KEYPAD_ROWS, GPIO_HIGH_LEVEL);" in the initKeypad function.

//
// Includes
//
#include <stdbool.h>
#include <stdint.h>
#include <math.h>
#include "inc/tm4c1294ncpdt.h"
#include "inc/hw_sysctl.h"
#include "inc/hw_types.h"
#include "inc/hw_memmap.h"
#include "driverlib/sysctl.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/interrupt.h"

//
// Defines
//
#define PORTC		GPIO_PORTC_AHB_BASE
#define PORTP		GPIO_PORTP_BASE

#define	KEYPAD_ROW_0	GPIO_PIN_0	// The row beginning with 1.
#define KEYPAD_ROW_1	GPIO_PIN_1	// The row beginning with 4.
#define KEYPAD_ROW_2	GPIO_PIN_2	// The row beginning with 7.
#define KEYPAD_ROW_3	GPIO_PIN_3	// The row beginning with P(*).
#define KEYPAD_ROWS		(KEYPAD_ROW_0|KEYPAD_ROW_1|KEYPAD_ROW_2|KEYPAD_ROW_3)

#define KEYPAD_COL_0	GPIO_PIN_4	// The column beginning with 1.
#define KEYPAD_COL_1	GPIO_PIN_5	// The column beginning with 2.
#define KEYPAD_COL_2	GPIO_PIN_6	// The column beginning with 3.
#define KEYPAD_COL_3	GPIO_PIN_7	// The column beginning with H(A).
#define KEYPAD_COLS		(KEYPAD_COL_0|KEYPAD_COL_1|KEYPAD_COL_2|KEYPAD_COL_3)

#define keypadRow   4
#define keypadCol   4

//
// Global Constants/Variables
//
// Constants
//
const uint8_t keys[keypadRow][keypadCol] =
{{'1','2','3','h'},
 {'4','5','6','k'},
 {'7','8','9','m'},
 {'p','0','f','e'}};

// Volatile Variables
//

// Standard Variables
//
uint32_t KEYPAD_ROW_PORT = 0, KEYPAD_COL_PORT = 0;
int32_t LAST_KEY_PRESSED = -2;

// Booleans
//
bool NEW_KEY_PRESSED = false;

//
// Function Portotype Definitions
//
initKeypad(uint32_t rowPort, uint32_t colPort);
void keyPressISR(void);

//
// Main Program
//
void main (void)
{

	//
    // Use external 25MHz Precision Oscillator to Generate an 120MHz System
    // Clock using the PLL
    //
    SysCtlMOSCConfigSet(SYSCTL_MOSC_HIGHFREQ);
    SYS_CLK_ACT = SysCtlClockFreqSet(SYSCTL_XTAL_25MHZ | SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
                    SYSCTL_CFG_VCO_480, SYS_CLK_REQ);

    //
    // Enable Peripherals
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOP);
	
	//
    // Enable GPIO AHB
    //
    SysCtlGPIOAHBEnable(SYSCTL_PERIPH_GPIOC);
	
	//
	// Initialize the keypad interface
	//
	initKeypad(PORTP, PORTC);
	
	while (1)
	{
		
		//
		// Loop Code
		//
		
	}
	
}

void initKeypad (uint32_t rowPort, uint32_t colPort)
{

	//
    // Configure GPIO Type
    //
    // Output
    //
	GPIOPinTypeGPIOOutput(colPort, KEYPAD_COLS);
	
    // Input
    //
	GPIOPinTypeGPIOInput(rowPort, KEYPAD_ROWS);

	//
    // Set GPIO Direction
    //
    // Output
    //
	GPIODirModeSet(colPort, KEYPAD_COLS, GPIO_DIR_MODE_OUT);
	
	// Input
    //
	GPIODirModeSet(rowPort, KEYPAD_ROWS, GPIO_DIR_MODE_IN);
	
	//
    // Configure GPIO Pad Properties
    //
    // Standard
    //
	GPIOPadConfigSet(colPort, KEYPAD_COLS, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);
    GPIOPadConfigSet(rowPort, KEYPAD_ROWS, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);

	//
	// Configure the GPIO Interrupt
	//
	GPIOIntTypeSet(rowPort, KEYPAD_ROWS, GPIO_HIGH_LEVEL);
	GPIOIntRegister(rowPort, keyPressISR);
	GPIOIntEnable(rowPort, KEYPAD_ROWS);

	GPIOPinWrite(colPort, KEYPAD_COLS, KEYPAD_COLS); // turn on every column

	KEYPAD_ROW_PORT = rowPort;
	KEYPAD_COL_PORT = colPort;

}

void keyPressISR(void)
{

	LAST_KEY_PRESSED = checkKeypad(); //poll the keypad
	NEW_KEY_PRESSED = true;

	GPIOPinWrite(KEYPAD_COL_PORT, KEYPAD_COLS, KEYPAD_COLS);
	
	GPIOIntClear(KEYPAD_ROW_PORT, KEYPAD_ROWS);

}