CCS/EK-TM4C123GXL: ADC conversion issue on the EK-TM4C123GXL

int main(void)
{
	//Set clock to 16 MHz
	SysCtlClockSet(SYSCTL_SYSDIV_10 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);

	// Enable the GPIOE,D and B peripheral

	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);

	// Enable the ADC0 module.
	//
	SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);

	// Wait for the GPIOE, B and D module to be ready.

	while(!SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOE))
	{
	}
	while(!SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOD))
	{
	}
	while(!SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOB))
	{
	}
	// Wait for the ADC0 module to be ready.
	//
	while(!SysCtlPeripheralReady(SYSCTL_PERIPH_ADC0))
	{
	}

	//Configure ADC functions
	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);
	ADCIntClear(ADC0_BASE, 3);
	ADCClockConfigSet(ADC0_BASE, ADC_CLOCK_SRC_PLL| ADC_CLOCK_RATE_FULL,24);

	/*void configADC(){ //configure PE# as an analog input
		SYSCTL_RCGCADC_R |= 1; //TURN ON ADC0 CLOCKING
		GPIO_PORTE_AFSEL_R |= 0X01; //SETTING ADC INPUT PINS
		GPIO_PORTE_DEN_R &= ~0X01;
		GPIO_PORTE_AMSEL_R |= 0X01; //TURN ON ANALOG OPERATION
		ADC0_CC_R = ADC_CC_CS_SYSPLL;
		ADC0_ACTSS_R &= ~ADC_ACTSS_ASEN3;
		ADC0_EMUX_R = ADC_EMUX_EM3_PROCESSOR;
		ADC0_SSMUX3_R = 3;
		ADC0_SSCTL3_R = ADC_SSCTL3_END0;
		ADC0_ACTSS_R |= ADC_ACTSS_ASEN3;

	}*/



	//Configures ADC pins PE1 and PE2 for proper operation PG 267
	//PE1 is Speed and PE2 is the Joystick

	GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_3);

	//Set output pins
	//GPIOPinTypeGPIOOutput(GPIO_PORTD_BASE, GPIO_PIN_0| GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3);
	GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE, GPIO_PIN_4|GPIO_PIN_5);
	GPIOPinTypeGPIOOutput(GPIO_PORTE_BASE, GPIO_PIN_5);

	//Set input pins
	GPIOPinTypeGPIOInput(GPIO_PORTE_BASE, GPIO_PIN_1 | GPIO_PIN_2 );

	//Write specific values to pins
	GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_5,GPIO_PIN_5 ); //Enable white/green A
	GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_4,0); //Reset blue/yellow C
	GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_2,0); //CCW(1 towards the rail,up)/CW(0 - towards the motor,down) orange/white D

	//clock signal
  /* delay = 1000000;
	while(1){
		GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0, GPIO_PIN_0); //B
		SysCtlDelay(delay);
		GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0, 0);
		SysCtlDelay(delay);
		GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0, GPIO_PIN_0);
		counter = counter + 1;
	}*/
	//Reading the Speed Potentiometer input
	while(1)
	{

		ADCProcessorTrigger(ADC0_BASE,3);
		//wait for the conversion to be completed
		while(!ADCIntStatus(ADC0_BASE,3,false))
		{
		}
		//clear Interrupt flag
		ADCIntClear(ADC0_BASE,3);

		//Read ADC input
		ADCSequenceDataGet(ADC0_BASE,3,array); //read the analog value for the x direction(array is the data)
		//ADCSequenceDataGet(ADC0_BASE,2,&array1); //read the analog value for speed
		speed_volt = ((array[0] * 3.3)/4095); //converting digital value to voltage
		//x_volt = ((array1 * 3.3)/4095); //converting digital value to voltage


		if (0.00<speed_volt<1.00)
		{ //if analog input gotten from the potentiometer
			delay = 2000000;
			while(1)
			{
				GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0, 0);
				SysCtlDelay(delay);
				GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0, 0);
				SysCtlDelay(delay);
				GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0, GPIO_PIN_0);
				counter = counter + 1;
			}
		}else if(2.00<speed_volt<3.00)
		{
			delay = 1000000;
			// while(counter<25){
			//GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0, GPIO_PIN_0);
			//SysCtlDelay(delay);
			GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0, 0);
			SysCtlDelay(delay);
			GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0, GPIO_PIN_0);
			SysCtlDelay(delay);
			GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_0, 0);
			//counter = counter + 1;
			 //}
		}
	}
}