Tiva C Series TM4C1294 Connected LaunchPad - ADC

//*****************************************************************************
//
// hello.c - Simple hello world example.
//
// Copyright (c) 2013-2014 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
// 
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
// 
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
// 
// This is part of revision 2.1.0.12573 of the EK-TM4C1294XL Firmware Package.
//
//*****************************************************************************

#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "inc/hw_adc.h"
#include "inc/hw_timer.h"
#include "driverlib/gpio.h"
#include "drivers/pinout.h"
#include "driverlib/pin_map.h"
#include "driverlib/rom.h"
#include "driverlib/rom_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/adc.h"
#include "driverlib/timer.h"
#include "driverlib/uart.h"
#include "utils/uartstdio.h"

//*****************************************************************************
//
//! \addtogroup example_list
//! <h1>Hello World (hello)</h1>
//!
//! A very simple ``hello world'' example.  It simply displays ``Hello World!''
//! on the UART and is a starting point for more complicated applications.
//!
//! Open a terminal with 115,200 8-N-1 to see the output for this demo.
//
//*****************************************************************************
uint32_t ui32adcValues[4],ui32Count,ui32adc0Values[1],ui32adc1Values[1],ui32adc2Values[1],ui32adc3Values[1];


//*****************************************************************************
//
// System clock rate in Hz.
//
//*****************************************************************************
uint32_t g_ui32SysClock;

//*****************************************************************************
//
// The error routine that is called if the driver library encounters an error.
//
//*****************************************************************************
#ifdef DEBUG
void
__error__(char *pcFilename, uint32_t ui32Line)
{
}
#endif

//*****************************************************************************
//
// Configure the UART and its pins.  This must be called before UARTprintf().
//
//*****************************************************************************
void
ConfigureADC(void)
{


		SysCtlPeripheralReset(SYSCTL_PERIPH_GPIOE);
		SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
		SysCtlPeripheralReset(SYSCTL_PERIPH_ADC0);
		SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
		SysCtlDelay(10);

	    GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_3 | GPIO_PIN_2 | GPIO_PIN_1 | GPIO_PIN_0 );

	    ADCClockConfigSet(ADC0_BASE, ADC_CLOCK_SRC_PLL | ADC_CLOCK_RATE_EIGHTH, 30);

	    	// Choose Sequencer 2 and set it at the highest Priority.
    	ADCSequenceConfigure(ADC0_BASE, 0, ADC_TRIGGER_ALWAYS,  0);

    	ADCSequenceConfigure(ADC0_BASE, 1, ADC_TRIGGER_ALWAYS,  0);

    	ADCSequenceConfigure(ADC0_BASE, 2, ADC_TRIGGER_ALWAYS,  0);

    	ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_ALWAYS,  0);

	    	// Choose Step 0 in Sequencer 2 as Data Buffer, set it as last Step and enable Interrupts


    	 ADCSequenceStepConfigure(ADC0_BASE,0,0, ADC_CTL_CH0);
    	 ADCSequenceStepConfigure(ADC0_BASE,0,1, ADC_CTL_CH1);

    	 ADCSequenceStepConfigure(ADC0_BASE,0,2, ADC_CTL_CH2);

    	 ADCSequenceStepConfigure(ADC0_BASE,0,3, ADC_CTL_CH3 | ADC_CTL_IE | ADC_CTL_END);


    	ADCSequenceEnable(ADC0_BASE, 0);
    	ADCSequenceEnable(ADC0_BASE, 1);
    	ADCSequenceEnable(ADC0_BASE, 2);
    	ADCSequenceEnable(ADC0_BASE, 3);


}


uint32_t
WaitAndReadADC(uint32_t *adcValues)
{

	ADCProcessorTrigger(ADC0_BASE,0);
    // Wait until the sample sequence has completed.

    while(!ADCIntStatus(ADC0_BASE, 0, false)) { }
    // Read the value from the ADC.


    return(ADCSequenceDataGet(ADC0_BASE, 0, adcValues));
}


uint32_t
WaitAndReadADC1(uint32_t *adcValues)
{

	ADCProcessorTrigger(ADC0_BASE,1);
    // Wait until the sample sequence has completed.

    while(!ADCIntStatus(ADC0_BASE, 1, false)) { }
    // Read the value from the ADC.


    return(ADCSequenceDataGet(ADC0_BASE, 1, adcValues));
}

uint32_t
WaitAndReadADC2(uint32_t *adcValues)
{

	ADCProcessorTrigger(ADC0_BASE,2);
    // Wait until the sample sequence has completed.

    while(!ADCIntStatus(ADC0_BASE, 2, false)) { }
    // Read the value from the ADC.


    return(ADCSequenceDataGet(ADC0_BASE, 2, adcValues));
}

uint32_t
WaitAndReadADC3(uint32_t *adcValues)
{

	ADCProcessorTrigger(ADC0_BASE,3);
    // Wait until the sample sequence has completed.

    while(!ADCIntStatus(ADC0_BASE, 3, false)) { }
    // Read the value from the ADC.


    return(ADCSequenceDataGet(ADC0_BASE, 3, adcValues));
}


//*****************************************************************************
//
// Print "Hello World!" to the UART on the Intelligent UART Module.
//
//*****************************************************************************
int
main(void)
{

    //
    // Run from the PLL at 120 MHz.
    //
    g_ui32SysClock = MAP_SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
                SYSCTL_OSC_MAIN | SYSCTL_USE_PLL |
                SYSCTL_CFG_VCO_480), 120000000);

    //
    // Configure the device pins.
    //
    PinoutSet(false, false);

    //
    // Enable the GPIO pins for the LED D1 (PN1).
    //
    ROM_GPIOPinTypeGPIOOutput(GPIO_PORTN_BASE, GPIO_PIN_1);

    //
    // Initialize the UART.
    //
    ConfigureADC();

    //
    // Hello!
    //


    //
    // We are finished.  Hang around flashing D1.
    //
    while(1)
    {



        //
        // Turn on D1.
        //
        LEDWrite(CLP_D1, 1);
     	//ui32Count = WaitAndReadADC0(ui32adc0Values);
     	//ui32Count = WaitAndReadADC1(ui32adc1Values);
     	//ui32Count = WaitAndReadADC2(ui32adc2Values);
     	ui32Count = WaitAndReadADC(ui32adcValues);



        //
        // Delay for a bit.
        //
       // SysCtlDelay(g_ui32SysClock / 10 / 3);

        //
        // Turn off D1.
        //
        LEDWrite(CLP_D1, 0);

        //
        // Delay for a bit.
        //
       // SysCtlDelay(g_ui32SysClock / 10 / 3);
    }
}