MSP432 ADC Sample A1 Example

Hello,

I have been trying to get the MSP432 ADC example code, msp432p401_adc14_01, to work on my MSP432P401R. Been through the Family Guide on most of the script and it seems to be written correctly. Not sure if the ADCCTL0 or ADCCTL1 registers are missing something. When I run it I change the voltage on P5.4 and the LED never changes. When decoding, if run for any length of time it gets stuck in the startup_script defaultISR infinite loop. The only thing that seems of interest to me is that its using A1 but MEM0. Don't know enough yet about the MSP432 but it doesn't seem that should be a problem. A lot of the comments seem out of order and it never seems to get to the ADC ISR at all. Any help is greatly appreciated, I'm likely missing something simple.

Thank You, Joshua

//******************************************************************************
//  MSP432P401 Demo - ADC14, Sample A1, AVcc Ref, Set P1.0 if A1 > 0.5*AVcc
//
//   Description: A single sample is made on A1 with reference to AVcc.
//   Software sets ADC14SC to start sample and conversion - ADC14SC
//   automatically cleared at EOC. ADC14 internal oscillator times sample (16x)
//   and conversion. In Mainloop MSP432 waits in LPM0 to save power until ADC14
//   conversion complete, ADC14_ISR will force exit from LPM0 in Mainloop on
//   reti. If A0 > 0.5*AVcc, P1.0 set, else reset. The full, correct handling of
//   and ADC14 interrupt is shown as well.
//
//
//                MSP432p401rpz
//             -----------------
//         /|\|              XIN|-
//          | |                 |
//          --|RST          XOUT|-
//            |                 |
//        >---|P5.4/A1      P1.0|-->LED
//
//   Dung Dang
//   Texas Instruments Inc.
//   November 2013
//   Built with Code Composer Studio V6.0
//******************************************************************************
#include "msp.h"
#include "stdint.h"

int main(void) {
	volatile unsigned int i;
    WDTCTL = WDTPW | WDTHOLD;                 // Stop WDT

    // GPIO Setup
    P1OUT &= ~BIT0;                           // Clear LED to start
    P1DIR |= BIT0;                            // Set P1.0/LED to output
    P5SEL1 |= BIT4;                           // Configure P5.4 for ADC
    P5SEL0 |= BIT4;

    __enable_interrupt();
    NVIC_ISER0 = 1 << ((INT_ADC14 - 16) & 31);         // Enable ADC interrupt in NVIC module

    // Configure ADC14
    ADC14CTL0 = ADC14SHT0_2 | ADC14SHP | ADC14ON;          // Sampling time, S&H=16, ADC14 on
    ADC14CTL1 = ADC14RES_2;                   // Use sampling timer, 12-bit conversion results

    ADC14MCTL0 |= ADC14INCH_1;                // A1 ADC input select; Vref=AVCC
    ADC14IER0 |= ADC14IE0;                    // Enable ADC conv complete interrupt

    SCB_SCR &= ~SCB_SCR_SLEEPONEXIT;           // Wake up on exit from ISR

    while (1)
    {
      for (i = 20000; i > 0; i--);            // Delay
      ADC14CTL0 |= ADC14ENC | ADC14SC;        // Start sampling/conversion
      __sleep();

//      __bis_SR_register(LPM0_bits | GIE);     // LPM0, ADC14_ISR will force exit
      __no_operation();                       // For debugger
    }




}

// ADC14 interrupt service routine

void ADC14IsrHandler(void) {
//    ADC14CLRIFGR0 |= CLRADC14IFG0;        //Attempt at clearing flag
    if (ADC14MEM0 >= 0x7FF)               // ADC12MEM0 = A1 > 0.5AVcc?
      P1OUT |= BIT0;                      // P1.0 = 1
    else
      P1OUT &= ~BIT0;                     // P1.0 = 0


}