I2041 SD24 Exception

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//******************************************************************************
//  MSP430i20xx Demo - SD24, Single Conversion on a Single Channel, Use ISR
//
//  Description: This program uses the SD24 module to perform a single
//  conversion on a single channel. A SD24 interrupt occurs when a conversion
//  has completed.
//
//  Test by applying a voltage to the input channel and setting a breakpoint
//  at the indicated line. Run program until it reaches the breakpoint, then use
//  the debugger's watch window to view the conversion results.
//
//  Results (upper 16 bits only) are stored in the variable "results"
//
//  ACLK = 32kHz, MCLK = SMCLK = Calibrated DCO = 16.384MHz, SD_CLK = 1.024MHz
//  * Ensure low_level_init.c is included when building/running this example *
//
//  Notes: For minimum Vcc required for SD24 module - see datasheet
//         100nF cap btw Vref and AVss is recommended when using 1.2V ref
//
//               MSP430i20xx
//             -----------------
//         /|\|                |
//          | |                |
//          --|RST             |
//            |                |
//   Vin1+ -->|A0.0+      VREF |---+
//   Vin1- -->|A0.0-           |   |
//            |                |  -+- 100nF
//            |                |  -+-
//            |                |   |
//            |           AVss |---+
//
//  T. Witt
//  Texas Instruments, Inc
//  September 2013
//  Built with Code Composer Studio v5.5
//******************************************************************************
#include "msp430.h"

#define BUFFER_SIZE 256

unsigned int results[BUFFER_SIZE];              // SD24 Conversion Result Buffer
unsigned int index = 0;                         // Buffer index

void main(void) {
    WDTCTL = WDTPW | WDTHOLD;                   // Stop WDT

    SD24CTL = SD24REFS;                         // Internal ref
    SD24CCTL0  |= SD24SNGL | SD24DF | SD24IE;   // Enable interrupt

    __delay_cycles(3200);                       // Delay ~200us for 1.2V ref to settle

    while(1) {
        SD24CCTL0 |= SD24SC;                    // Set bit to start conversion
        __bis_SR_register(LPM0_bits | GIE);     // Enter LPM0 w/ interrupts
        __no_operation();                       // For debugger

        if(index > (BUFFER_SIZE - 1)) {         // If index has reached end of buffer
        	index = 0;                          // Reset index
        	__no_operation();                   // SET BREAKPOINT HERE
        }
    }
}

#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=SD24_VECTOR
__interrupt void SD24_ISR(void) {
#elif defined(__GNUC__)
void __attribute__ ((interrupt(SD24_VECTOR))) SD24_ISR (void)
#else
#error Compiler not supported!
#endif
    switch (__even_in_range(SD24IV,SD24IV_SD24MEM3)) {
        case SD24IV_NONE: break;
        case SD24IV_SD24OVIFG: break;
        case SD24IV_SD24MEM0:
                   results[index++] = SD24MEM0; // Save CH0 results (clears IFG)
                   break;
        case SD24IV_SD24MEM1: break;
        case SD24IV_SD24MEM2: break;
        case SD24IV_SD24MEM3: break;
        default: break;
    }
    __bic_SR_register_on_exit(LPM0_bits);       // Wake up from LPM0
}