进不去中断

只看该作者 · 2014-8-15 17:49

#include "msp430g2553.h"

void Timer0A0Init();
unsigned int temp[3];
unsigned int overflow;
unsigned int m,i;
unsigned int p,q;

void main()
{

WDTCTL = WDTPW + WDTHOLD;    // Stop WTD
Timer0A0Init();
_enable_interrupts(); //使能总中断
_bis_SR_register(LPM3_bits); //LPM3方式休眠
   while(1);
}

void Timer0A0Init()//定时器timer0的初始化程序
{
P1DIR &= ~BIT4;
P1SEL |= BIT4;
TACTL |= TASSEL_1 + MC_2 + TACLR + TAIE; //时钟源：ACLK;连续模式；清除； TAIE溢出中断
TACCTL0 |=  CM_3 + CAP + SCS +CCIS_0 ;
q=1;
}

#pragma vector=TIMER0_A0_VECTOR
__interrupt void TA0_ISR(void)
{
  switch(TAIV)
  {
  case 2:                //是捕获中断  2为CCR1捕获中断向量值

      p=1;
temp[i++]=TACCR0;
if(i==3)
{
i=0;
m=360*(temp[1]-temp[0])/(temp[2]-temp[0]);
}

      break;
  case 14:                                              //是溢出中断
         overflow++;                               //溢出次数自加1
         break;
  default: break;
  }
  P1IFG=0;
}
单步调试，或者全速运行都进不去中断，请问是哪里写的不对吗？这是个捕获然后计算脉宽的。。