问 在P1.3加方波。怎么也进入不了中断，不知道为什么，请大家帮忙，谢谢

main()

{

WDTCTL = WDTPW + WDTHOLD; // Stop WDT
IFG1=0;
IFG2=0;
_DINT(); //disable interrupt
_BIC_SR(OSCOFF); //clear the bit OSCOFF
BCSCTL1 &= ~XT2OFF; //disable LFXT2;[p82]
BCSCTL1 |= RSEL1+RSEL0+XTS; //mode;
BCSCTL1 &= ~RSEL2; //DCO=0.47MHz(011);
delay(10000);
IFG1 &= ~OFIFG; //osc effective;[p17]
BCSCTL2 |= SELM1+SELM0; //select LFXT1CLK for MCLK;

P1IES|=0x0FE;
//init_ta0
TACTL=TASSEL0+ID_2+TACLR;
CCTL1 =0x4910; //0100 1001 0001 0000
CCTL2 = 0x4910;

P1DIR = 0x01; // P1.0
_EINT();
while(1)
{;}
}

interrupt[TIMERA1_VECTOR] void TIMERA1ISR (void)
{
switch( TAIV )
{
case 2: break; /* CCR1 */
case 4:
P1OUT ^= 0x01;
break; /* CCR2 */
case 6: break; /* CCR3 */
case 8: break; /* CCR4 */
case 10: /* Timer_A3 overflow */
P1OUT ^= 0x01;
break;
default:
break;
}

} 答 1: 计数器没打开
TACTL|=MC1;