How to use timer A to generate interrupt every 1 second continuously for an hour

Hi

I am using MSP430F5635.

I want to create timer interval for 1 second .

I have posted the code below .

The ISR has to blink the LED every 1 second . but this is not working .

Please help me out .

Thanks in advance.

Jenitta

This is my code .

void timer_init()

{

TA1CCTL0 = CCIE;

TA1CTL = TASSEL_1 + MC_1 + TACLR + TAIE;

TA1CCR0 = 32768;

}

#pragma vector=TIMER1_A0_VECTOR
__interrupt void TIMER1_A0_ISR(void)
{
 P1OUT ^= BIT4; // blink my led

}