MSP430F5529 Timer A Interrupt with Driver Library

Hello,

I am trying to understand how to use Timer A0 with the Driver Library APIs by toggling an LED (P1.0) every 15 seconds. The code runs, but the interrupt is never triggered. I think I want to use Up Mode with compare to trigger an interrupt every 15 seconds. Here is the code that sets up the clock:

UCS_initClockSignal(UCS_FLLREF, UCS_REFOCLK_SELECT, UCS_CLOCK_DIVIDER_1); // 32.768kHz
UCS_initClockSignal(UCS_ACLK, UCS_REFOCLK_SELECT, UCS_CLOCK_DIVIDER_16); // 32.768kHz / 16 = 2.048kHz
UCS_initFLLSettle(UCS_MCLK_DESIRED_FREQUENCY_IN_KHZ, UCS_MCLK_FLLREF_RATIO); // 8MHz

The way I calculated the time for the interrupt is: 65535 / 15 = 4369, where 15 is the number of seconds after an interrupt should occur. The result would be the compare value. Here is the code for configuring the timer:

// Configure timer
Timer_A_initUpModeParam upModeParam = {0};
upModeParam.clockSource = TIMER_A_CLOCKSOURCE_ACLK;
upModeParam.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_1;
upModeParam.timerInterruptEnable_TAIE = TIMER_A_TAIE_INTERRUPT_DISABLE;
upModeParam.timerClear = TIMER_A_DO_CLEAR;
upModeParam.captureCompareInterruptEnable_CCR0_CCIE = TIMER_A_CCIE_CCR0_INTERRUPT_ENABLE;
upModeParam.startTimer = false;
Timer_A_initUpMode(TIMER_A0_BASE, &upModeParam);

Timer_A_clearCaptureCompareInterrupt(TIMER_A0_BASE, TIMER_A_CAPTURECOMPARE_REGISTER_0);

// Initialize compare mode
Timer_A_initCompareModeParam compModeParam = {0};
compModeParam.compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_0;
compModeParam.compareInterruptEnable = TIMER_A_CAPTURECOMPARE_INTERRUPT_ENABLE;
compModeParam.compareOutputMode = TIMER_A_OUTPUTMODE_OUTBITVALUE;
compModeParam.compareValue = COMPARE_VALUE;
Timer_A_initCompareMode(TIMER_A0_BASE, &compModeParam);

// Start timer
upModeParam.startTimer = true;

I added a counter so that the LED would toggle once the condition is satisfied. Here is the code I have for the interrupt handler:

#pragma vector=TIMER0_A0_VECTOR
__interrupt void TIMER_A0(void)
{
	if (timerA_cntr == 1)
	{
		GPIO_toggleOutputOnPin(GPIO_PORT_P1, GPIO_PIN0);
		timerA_cntr = 0;
	}
	else
	{
		timerA_cntr++;
	}
}

Here is the code for the main loop:

// Stop the watchdog timer
WDT_A_hold(WDT_A_BASE);

// Initialize clocks
init_clock();

// Initialize GPIO
init_gpio();

// Initialize Timer A
init_timer_a();

__enable_interrupt();

while (1)
{
    // Enter Low-power Mode 3
    __bis_SR_register(LPM3_bits);
}

Can anyone offer suggestions of where I am going wrong?

Anson