Interfacing with Capacitive Touch Screen FT5306

Hello, I'm having trouble getting data from the touch screen FT5306. This chip comes pre-assembled with other components, where the interface pins consists of 6 pins in the following order: VDD, GND, SCL, SDA, INT, and RESET. This post does overlap with my previous post, but the previous post mainly concerned with the I2C connection (which I have got some confirmation that my setup and waveform seems fine; I will have 100% confirmation Monday when I get access to an oscilloscope). The main difference with this post is that I have updated my code to reflect the example codes given in the datasheet, as well as on other sites. Yet, I'm still reading back values of 0. I wanted to make sure if my code is properly setting up I2C and communicating with the touch screen. 

From my research, I've come to the conclusion that to access the registers containing the values in the touch screen, I need to send the byte matching the address of the register from master to slave, then perform a read to retrieve the value of the register that I specified. Consecutive reads after this will retrieve the values of subsequent registers. This behavior can be seen from the sample code in this datasheet on page 15, and in this forum in reply #6.
  

Here is my initialization code for the I2C module on the launchpad:

void initTouchPanel()
{
	//
	// Enable the peripherals to be used.
	//
	MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);
	MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
	MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOL);

	//
	// Waits for peripherals to be ready.
	//
	while (!MAP_SysCtlPeripheralReady(SYSCTL_PERIPH_I2C0) &&
			!MAP_SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOL) &&
			!MAP_SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOB));

	//
	// Configure PB2 and PB3 for I2C
	//
    MAP_GPIOPinConfigure(GPIO_PB2_I2C0SCL);
    MAP_GPIOPinConfigure(GPIO_PB3_I2C0SDA);

    //
    // Select I2C function for PB2 and PB3
    //
    MAP_GPIOPinTypeI2CSCL(GPIO_PORTB_BASE, GPIO_PIN_2);
    MAP_GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_3);

	//
	// Configure pin PL4 as input. (Remember to change to PL6 later)
	//
	MAP_GPIOPinTypeGPIOInput(GPIO_PORTL_BASE, GPIO_PIN_4);

	//
	// Configure pin PL5 as output. (Remember to change to PL7 later)
	//
	MAP_GPIOPinTypeGPIOOutput(GPIO_PORTL_BASE, GPIO_PIN_5);

	//
	// Drive PL5 HIGH.
	//
	MAP_GPIOPinWrite(GPIO_PORTL_BASE, GPIO_PIN_5, 0x20);
}

This function reads in 30 values from the touch screen (based on the sample code in the datasheet):

void touchPanelReadData(uint32_t g_ui32SysClock)
{
	uint8_t i = 0;

	uint32_t touch_data_buf[30] = {};

	//
	// Command master to perform a single write.
	//
	touchPnlWrite(g_ui32SysClock, 0x00);

	//
	// Perform error check.
	//
	if (MAP_I2CMasterErr(I2C0_BASE) != I2C_MASTER_ERR_NONE)
	{
		UARTprintf("Error = %d\n\n", MAP_I2CMasterErr(I2C0_BASE));
		return;
	}

	//
	// Get touch data.
	//
	for (i = 0; i < 30; ++i)
	{
		//
		// Command master to perform a single read.
		//
		touchPnlRead(g_ui32SysClock);

		//
		// Perform error check.
		//
		if (MAP_I2CMasterErr(I2C0_BASE) != I2C_MASTER_ERR_NONE)
		{
			UARTprintf("Error = %d\n\n", MAP_I2CMasterErr(I2C0_BASE));
			return;
		}

		touch_data_buf[i] = MAP_I2CMasterDataGet(I2C0_BASE);
	}

	for (i = 0; i < 30; ++i)
	{
		UARTprintf("touch_data_buf[%d] = %d\n", i, touch_data_buf[i]);
	}
	UARTprintf("\n");
}

These two helper functions perform a single send and single receive:

//*****************************************************************************
//
// Receive one byte from touch panel.
//
//*****************************************************************************
void touchPnlRead(uint32_t g_ui32SysClock)
{
	//
	// Configure and enable master.
	//
	MAP_I2CMasterInitExpClk(I2C0_BASE, g_ui32SysClock, false);

	//
	// Set slave address.
	//
	MAP_I2CMasterSlaveAddrSet(I2C0_BASE, 0x71, true);

	//
	// Initiate master single receive.
	//
	MAP_I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_SINGLE_RECEIVE);

	//
	// Wait for master to finish transaction.
	//
	while (MAP_I2CMasterBusy(I2C0_BASE));
}

//*****************************************************************************
//
// Send one byte to touch panel.
//
//*****************************************************************************
void touchPnlWrite(uint32_t g_ui32SysClock, uint8_t ui8Data)
{
	//
	// Configure and enable master.
	//
	MAP_I2CMasterInitExpClk(I2C0_BASE, g_ui32SysClock, false);

	//
	// Set slave address.
	//
	MAP_I2CMasterSlaveAddrSet(I2C0_BASE, 0x70, false);

	//
	// Place data to be send into FIFO.
	//
	MAP_I2CMasterDataPut(I2C0_BASE, ui8Data);

	//
	// Initiate master single send.
	//
	MAP_I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_SINGLE_SEND);

	//
	// Wait for master to finish transaction.
	//
	while (MAP_I2CMasterBusy(I2C0_BASE));
}