potentiometer reading

I have some issue with analog reading, but when it shown in putty, the reading from potentiometer is not changing when I turn the knob. Here is the code that I wrote:

#include <stdint.h>
#include <stdbool.h>
#include "stdlib.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_timer.h"
#include "inc/hw_uart.h"
#include "inc/hw_gpio.h"
#include "inc/hw_pwm.h"
#include "inc/hw_types.h"
#include "driverlib/adc.h"
#include "driverlib/pin_map.h"
#include "driverlib/timer.h"
#include "driverlib/gpio.h"
#include "driverlib/interrupt.h"
#include "driverlib/rom.h"
#include "driverlib/rom_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/uart.h"
#include "driverlib/udma.h"
#include "driverlib/pwm.h"
#include "driverlib/ssi.h"
#include "driverlib/systick.h"
#include <string.h>

#define TARGET_IS_TM4C123_RB1
#define UART_BUFFERED
volatile uint32_t millis=0;

void SycTickInt()
{
millis++;
}

void SysTickbegin()
{
SysTickPeriodSet(80000);
SysTickIntRegister(SycTickInt);
SysTickIntEnable();
SysTickEnable();
}

void Wait(uint32_t time){
uint32_t temp = millis;
while( (millis-temp) < time){
}
}

void InitConsole(void)
{

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);

GPIOPinConfigure(GPIO_PA0_U0RX);
GPIOPinConfigure(GPIO_PA1_U0TX);

SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
UARTClockSourceSet(UART0_BASE, UART_CLOCK_PIOSC);
GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
UARTStdioConfig(0, 115200, 16000000);
}

int main(void)
{
uint32_t ADCValues[1];
SysCtlClockSet(SYSCTL_SYSDIV_5|SYSCTL_USE_PLL|SYSCTL_OSC_MAIN|SYSCTL_XTAL_16MHZ);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_3);
SysTickbegin();
InitConsole();

UARTprintf("ADC ->\n");
UARTprintf(" Type: Potentiometer\n");
UARTprintf(" Samples: One\n");
UARTprintf(" Update Rate: 250ms\n");
UARTprintf(" Input Pin: PIN E3 \n\n");

SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_PROCESSOR, 0);
ADCSequenceStepConfigure(ADC0_BASE,3,0,ADC_CTL_CH0|ADC_CTL_IE|ADC_CTL_END);
ADCSequenceEnable(ADC0_BASE, 3);

while(1)
{
ADCIntClear(ADC0_BASE, 3);
ADCProcessorTrigger(ADC0_BASE, 3);
ADCSequenceDataGet(ADC0_BASE, 3, ADCValues);
UARTprintf("value = %2d \n" , ADCValues);

SysCtlDelay(80000000 / 12);
}
}

Thanks,

Ferry