MSP-EXP430F5529: Problem with MSP430F5529 Launchpad input capture both edges

Hello,

I have been trying to implement this input capture functionality to measure the high time and low time of a continuous 1 Hz square wave with 50% duty cycle. Just to make it simple I started out with this.

I am able to trigger the interrupt on a rising edge. But for some reason, the interrupt won't trigger on a falling edge. Whenever I set CM to input capture both edges, the interrupt would only trigger on a rising edge.

I am using TA0.1. Please help. Below is my code and the ISR

void EnableCaptureTA01(void)
{
    GPIO_setAsPeripheralModuleFunctionInputPin(
                      GPIO_PORT_P1, GPIO_PIN2
                      );

    Timer_A_initContinuousModeParam initContParam = {0};
    initContParam.clockSource = TIMER_A_CLOCKSOURCE_ACLK;
    initContParam.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_1;
    initContParam.timerInterruptEnable_TAIE = TIMER_A_TAIE_INTERRUPT_DISABLE;
    initContParam.timerClear = TIMER_A_DO_CLEAR;
    Timer_A_initContinuousMode(TIMER_A0_BASE, &initContParam);

    Timer_A_startCounter(TIMER_A0_BASE, TIMER_A_CONTINUOUS_MODE);
    Timer_A_clearCaptureCompareInterrupt(TIMER_A0_BASE, TIMER_A_CAPTURECOMPARE_REGISTER_1);

    Timer_A_initCaptureModeParam initCapParam = {0};
    initCapParam.captureRegister = TIMER_A_CAPTURECOMPARE_REGISTER_1;
    initCapParam.captureMode = TIMER_A_CAPTUREMODE_RISING_AND_FALLING_EDGE;
    initCapParam.captureInputSelect = TIMER_A_CAPTURE_INPUTSELECT_CCIxA;
    initCapParam.synchronizeCaptureSource = TIMER_A_CAPTURE_SYNCHRONOUS;
    initCapParam.captureInterruptEnable = TIMER_A_CAPTURECOMPARE_INTERRUPT_ENABLE;
    initCapParam.captureOutputMode = TIMER_A_OUTPUTMODE_OUTBITVALUE;
    Timer_A_initCaptureMode(TIMER_A0_BASE, &initCapParam);
}//end void EnableCaptureTA01(void)


void TIMERA0ISR (void)
{
    uint8_t integerArray[10];
    //uint8_t integerArray[10];
    //Timer_A_clearCaptureCompareInterrupt(TIMER_A0_BASE, TIMER_A_CAPTURECOMPARE_REGISTER_1);
    switch(__even_in_range(TA0IV,0x0E))
    {
        case 0x0: break;
        case 0x2:
            Timer_A_clearCaptureCompareInterrupt(TIMER_A0_BASE, TIMER_A_CAPTURECOMPARE_REGISTER_1);
                GPIO_toggleOutputOnPin(GPIO_PORT_P4, GPIO_PIN7);

                Edge= Timer_A_getCaptureCompareCount(TIMER_A0_BASE, TIMER_A_CAPTURECOMPARE_REGISTER_1);
                UINT32ToASCII(Edge, integerArray);
                WriteUARTA1("\n\rEdge = ");
                WriteUARTA1(integerArray);


                Time = (double)(Edge- PreviousEdge);
                if(Time < 0)
                {
                    Time = Time + 65535;
                }

                Time = (Time + 1) / ACLKValue;
                DoubleToASCII(Time, 3, integerArray);
                WriteUARTA1("\n\rTime = ");
                WriteUARTA1(integerArray);

                PreviousEdge = Edge;

                if(TIMER_A_CAPTURE_OVERFLOW == Timer_A_getCaptureCompareInterruptStatus
                    (TIMER_A0_BASE, TIMER_A_CAPTURECOMPARE_REGISTER_1, TIMER_A_CAPTURE_OVERFLOW ))
                {
                    WriteUARTA1("\n\rOverflow occurred ");
                }
            break;
        case 0x4: break;
        case 0x6: break;
        case 0x8: break;
        case 0xA: break;
        case 0xC: break;
        default:  break;
    }//end switch(__even_in_range(TA0IV,0x0E))

}//end void TIMERA0ISR (void)

Here is the output from my terminal. Since the squarewave is 1 HZ, and I have set the capture to both edges, I'd expect a .5 sec high and .5 sec low time. But I'm just getting the entire period

because the interrupt triggers only on the rising edge. Am I missing anything? Thanks a lot

Edge = 14264
Time = 1.000
Edge = 47033
Time = 1.000
Edge = 14267
Time = 1.000
Edge = 47036
Time = 1.000
Edge = 14268
Time = 1.000
Edge = 47038
Time = 1.000
Edge = 14271
Time = 1.000
Edge = 47040
Time = 1.000
Edge = 14272
Time = 1.000
Edge = 47041
Time = 1.000

AJ