CCS/MSP432P401R: msp432 timer stuck at cpu.wfi()

/* DriverLib Includes */
#include <ti/devices/msp432p4xx/driverlib/driverlib.h>

/* Application Defines  */
#define TIMER_PERIOD    0x2DC6
uint16_t buffer[66]={0};
/* Timer_A UpMode Configuration Parameter */
const Timer_A_UpModeConfig upModeConfig =
{
        TIMER_A_CLOCKSOURCE_SMCLK,            // ACLK Clock Source
        TIMER_A_CLOCKSOURCE_DIVIDER_10,       // ACLK/1 = 32Khz
        1,
        TIMER_A_TAIE_INTERRUPT_DISABLE,      // Disable Timer ISR
        TIMER_A_CCIE_CCR0_INTERRUPT_DISABLE, // Disable CCR0
        TIMER_A_DO_CLEAR                     // Clear Counter
};

/* Timer_A Compare Configuration Parameter
const Timer_A_CompareModeConfig compareConfig =
{
        TIMER_A_CAPTURECOMPARE_REGISTER_1,          // Use CCR1
        TIMER_A_CAPTURECOMPARE_INTERRUPT_DISABLE,   // Disable CCR interrupt
        TIMER_A_OUTPUTMODE_SET_RESET,               // Toggle output but
        1                                          // 16000 Period
};*/

int main(void)
{
    /* Stop WDT  */
    WDT_A_holdTimer();

    /* Configuring P1.0 as output */
    GPIO_setAsOutputPin(GPIO_PORT_P1, GPIO_PIN0);
    GPIO_setOutputLowOnPin(GPIO_PORT_P1, GPIO_PIN0);

    /* Configuring Timer_A1 for Up Mode */
    Timer_A_configureUpMode(TIMER_A1_BASE, &upModeConfig);

    /* Enabling interrupts and starting the timer */
    Interrupt_enableSleepOnIsrExit();

    REF_A_setReferenceVoltage(REF_A_VREF2_5V);
    REF_A_enableReferenceVoltage();

    ADC14_disableConversion();
    ADC14_enableModule();
    ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1, 0);

    GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5, GPIO_PIN7|GPIO_PIN6
                |GPIO_PIN4, GPIO_TERTIARY_MODULE_FUNCTION);
    GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P9,
                GPIO_PIN0 | GPIO_PIN1, GPIO_TERTIARY_MODULE_FUNCTION);

    ADC14_configureMultiSequenceMode(ADC_MEM0, ADC_MEM2, false);
    ADC14_configureConversionMemory(ADC_MEM0,ADC_VREFPOS_AVCC_VREFNEG_VSS ,
                    ADC_INPUT_A0, false);
    ADC14_configureConversionMemory(ADC_MEM1,ADC_VREFPOS_AVCC_VREFNEG_VSS ,
                    ADC_INPUT_A16, false);
    ADC14_configureConversionMemory(ADC_MEM2,ADC_VREFPOS_AVCC_VREFNEG_VSS ,
                    ADC_INPUT_A17, false);

    //ADC14_enableInterrupt(ADC_INT2);

    /* Enabling Interrupts
    Interrupt_enableInterrupt(INT_ADC14);*/
    ADC14_enableConversion();
    ADC14_toggleConversionTrigger();
    ADC14_setSampleHoldTrigger(ADC_TRIGGER_SOURCE1, false);
    ADC14_enableSampleTimer(ADC_AUTOMATIC_ITERATION);
    Interrupt_enableInterrupt(INT_TA1_0);
    /* Enabling MASTER interrupts */
    Interrupt_enableMaster();
    Timer_A_startCounter(TIMER_A1_BASE, TIMER_A_UP_MODE);




    /* Sleeping when not in use */
    while (1)
    {
        PCM_gotoLPM0();
    }
}

void TA1_0_IRQHandler(void)
{
    uint16_t index=0;

    GPIO_toggleOutputOnPin(GPIO_PORT_P1, GPIO_PIN0);
    ADC14_disableConversion();
   // ADC14_getMultiSequenceResult(resultsBuffer);
    buffer[index] = ADC14->MEM[0];
    buffer[index+1] = ADC14->MEM[1];
    buffer[index+2] = ADC14->MEM[2];

     index=index+3;
     if(index==66)
     {
         index=0;
     }
    Timer_A_clearCaptureCompareInterrupt(TIMER_A1_BASE,
           TIMER_A_CAPTURECOMPARE_REGISTER_0);

    ADC14_enableConversion();
    //ADC14_toggleConversionTrigger();

}