MSP432 软件方法怎么实现16位AD

给你提供一个参考，你下载后可以看到很多个ADC操作的示例

/*
 * -------------------------------------------
 *    MSP432 DriverLib - v3_21_00_05 
 * -------------------------------------------
 *
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 * Copyright (c) 2016, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
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 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * --/COPYRIGHT--*/
/*******************************************************************************
 * MSP432 ADC14 -  Single Channel with External Reference
 *
 * Description: This very simple code example shows the use of an external
 * reference for use in the ADC14 module. A single channel sample/conversion
 * is setup on input A0 (P5.5) and the sample timer is used to continuously
 * store the result in a local variable. The value coming in VREF+ (P5.6) is
 * treated as the max value of the ADC and the value coming in VREF- (P5.7) is
 * treated as the minimum value.
 *
 *                MSP432P401
 *             ------------------
 *         /|\|                  |
 *          | |                  |
 *          --|RST         P5.5  |<---- A0 In
 *            |            P5.6  |<---- VREF+
 *            |            P5.7  |<---- VREF-
 *            |                  |
 *
 * Author: Timothy Logan
 ******************************************************************************/
/* DriverLib Includes */
#include "driverlib.h"

/* Standard Includes */
#include <stdint.h>

#include <string.h>

volatile uint16_t adcResult;

int main(void)
{
    /* Halting WDT */
    WDT_A_holdTimer();
    Interrupt_enableSleepOnIsrExit();
    
    /* Initializing ADC (MCLK/1/1) */
    ADC14_enableModule();
    ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1,
            0);

    /* Configuring ADC Memory (ADC_MEM0 A0/A1) in repeat mode
     * with use of external references */
    ADC14_configureSingleSampleMode(ADC_MEM0, true);
    ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_EXTPOS_VREFNEG_EXTNEG,
            ADC_INPUT_A0, false);

    /* Setting up GPIO pins as analog inputs (and references) */
    GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5,
            GPIO_PIN7 | GPIO_PIN6 | GPIO_PIN5 | GPIO_PIN4, GPIO_TERTIARY_MODULE_FUNCTION);

    /* Enabling sample timer in auto iteration mode and interrupts*/
    ADC14_enableSampleTimer(ADC_AUTOMATIC_ITERATION);
    ADC14_enableInterrupt(ADC_INT0);

    /* Enabling Interrupts */
    Interrupt_enableInterrupt(INT_ADC14);
    Interrupt_enableMaster();

    /* Triggering the start of the sample */
    ADC14_enableConversion();
    ADC14_toggleConversionTrigger();

    /* Going to sleep */
    while (1)
    {
        PCM_gotoLPM0();
    }
}

/* This interrupt happens whenever a conversion has been completed and placed
 * into ADC_MEM0. */
void ADC14_IRQHandler(void)
{
    uint64_t status;

    status = ADC14_getEnabledInterruptStatus();
    ADC14_clearInterruptFlag(status);

    if(status & ADC_INT0)
    {
        adcResult = ADC14_getResult(ADC_MEM0);
    }

}

建议您看一下相关的APP NOTE： Precision ADC With 16-Bit Performance

 给出了相关的测试代码。