Initialize ADC on tm4c123g for sequence 0 operation with oversampling

Hi guys

I'm having some trouble properly configuring the ADC on my TM4C123G board for sequence 0 with oversampling. I've read through many examples in these forums and the datasheet but I'm unsure what is causing my error. Here is my code to initialize the ADC:

//ADC Definitions
#define ADC_SEQ_NUMBER			0
#define ADC_PRIORITY_LEVEL		0
#define ADC0_OVERSAMPLE_RATE	        64//Must be exponent of two, no more then 64
#define NUM_OF_ADC_PINS			8
#define PORT_B_ADC_PINS			(GPIO_PIN_5)
#define PORT_D_ADC_PINS			(GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3)
#define PORT_E_ADC_PINS			(GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_5)

//-----------------------------------------------------------------------------------------

void initADC()
{
	//Enable the ADC
	SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
	SysCtlDelay(3);
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
	SysCtlDelay(3);
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
	SysCtlDelay(3);
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
	SysCtlDelay(3);

	//Set ADC PINS
	GPIOPinTypeADC(GPIO_PORTB_BASE, PORT_B_ADC_PINS);
	SysCtlDelay(3);
	GPIOPinTypeADC(GPIO_PORTD_BASE, PORT_D_ADC_PINS);
	SysCtlDelay(3);
	GPIOPinTypeADC(GPIO_PORTE_BASE, PORT_E_ADC_PINS);
	SysCtlDelay(3);

	//Set ADC to sample at 500 KSPS and then average 64 of them for each result
	SysCtlADCSpeedSet(SYSCTL_ADCSPEED_500KSPS);
	SysCtlDelay(3);
	ADCHardwareOversampleConfigure(ADC0_BASE, ADC0_OVERSAMPLE_RATE);//ENTER FAULTISR HERE!!!
	SysCtlDelay(3);

	//Turn off ADC sequence before configuring
	ADCSequenceDisable(ADC0_BASE, ADC_SEQ_NUMBER);//If I remove the oversampling, it enters the FAULTISR HERE
	SysCtlDelay(3);

	//Configure the ADC - Sequence 0 -> 8 steps
	ADCSequenceConfigure(ADC0_BASE, ADC_SEQ_NUMBER,
						 ADC_TRIGGER_PROCESSOR, ADC_PRIORITY_LEVEL);
	ADCSequenceStepConfigure(ADC0_BASE, ADC_SEQ_NUMBER, 0, ADC_CTL_CH1);
	ADCSequenceStepConfigure(ADC0_BASE, ADC_SEQ_NUMBER, 1, ADC_CTL_CH2);
	ADCSequenceStepConfigure(ADC0_BASE, ADC_SEQ_NUMBER, 2, ADC_CTL_CH4);
	ADCSequenceStepConfigure(ADC0_BASE, ADC_SEQ_NUMBER, 3, ADC_CTL_CH5);
	ADCSequenceStepConfigure(ADC0_BASE, ADC_SEQ_NUMBER, 4, ADC_CTL_CH6);
	ADCSequenceStepConfigure(ADC0_BASE, ADC_SEQ_NUMBER, 5, ADC_CTL_CH7);
	ADCSequenceStepConfigure(ADC0_BASE, ADC_SEQ_NUMBER, 6, ADC_CTL_CH8);
	ADCSequenceStepConfigure(ADC0_BASE, ADC_SEQ_NUMBER, 7, ADC_CTL_CH11 | ADC_CTL_IE |
							 ADC_CTL_END);

	//Enable the sequence and clear the interrupt flag
	ADCSequenceEnable(ADC0_BASE, ADC_SEQ_NUMBER);
	ADCIntClear(ADC0_BASE, ADC_SEQ_NUMBER);
}

The code builds and starts to run, but I've marked which lines put me into the faultISR. The goal of this program is to use the 8 analog input pins on the evaluation board to sample some sensors.

Another question that I have, is that if there is 12 analog in pins, why can each sequence only have a FIFO depth of (up to) 8? To utilize all pins, does one have to use both ADC converters?

Eventually, I would like to use the comparators but would like to get this code working first.