#include "msp430.h"
// set names for bits to improve code readability
#define LED0 BIT0
#define LED1 BIT6
#define LED_DIR P1DIR
#define LED_OUT P1OUT
void main (void)
{
WDTCTL = WDTPW + WDTHOLD; // halt the watchdog timer
LED_DIR |= LED0 + LED1; // set both pins with our two LEDs as ouputs
LED_OUT &= ~(LED0 + LED1); // make sure both LEDs are off to begin with
TACCTL0 = CCIE; // enable timer interrupt
TACCR0 = 16384; // set timer value to count
// Start timer A0, in UP mode. which counts from 0x0000 to the value
// in TACCR0, then generate an interrupt.
TACTL = TASSEL1 + MC_1;
// Enter low power mode one, with general interrupts enabled.
__bis_SR_register(LPM1_bits + GIE);
}
#pragma vector=TIMERA0_VECTOR // timer A0 interrupt routine
__interrupt void timerA0_isr(void) {
// Flip the output state of both LEDs.
// After each interrupt, the state changes, which makes the LEDs blink.
LED_OUT ^= (LED0 + LED1);
}
You can change timer to make it blink at proper interval. Also if you initially set one led on and the other off, when the interrupt occurs they will blink alternately.