MSP430 LaunchPad 定时器A捕获无法进入中断

只看该作者 · 2012-11-8 14:58

#include "msp430g2553.h"
unsigned int lastCCR0,lastCCR1;
unsigned int j;
unsigned int k;
int main( void )
{
  WDTCTL = WDTPW + WDTHOLD;//停止看门狗
  P1DIR |= (BIT0 + BIT4 + BIT6);
  P1DIR &= ~BIT2;
  P1SEL |= (BIT4 + BIT2);//P1.4->SMCLK输出，P1.2->捕获输入
  BCSCTL2 |= SELS;//SMCLK时钟源选择为LFXT1CLK(32768HZ)
  TACTL = TASSEL_2  + MC_2 + TACLR + TAIE ;//定时器A时钟源为SMCLK,连续计数模式，定时器清零
  CCTL0 = CM_3 + SCS + CCIS_0  + CAP + CCIE;//上升沿和下降沿都捕获,同步,捕获模式,捕获中断允许
  CCTL1 = CM_1 + SCS + CCIS_0  + CAP + CCIE;//上升沿捕获,同步,捕获模式,捕获中断允许
  j = 0;
  k = 0;
  lastCCR0 = 0;
  lastCCR1 = 0;
  _EINT();
  while(1);
}
#pragma vector = TIMER0_A1_VECTOR
__interrupt void TIMER_A1(void)
{
  switch(TAIV)
  {
case 2: P1OUT ^= BIT6;
         j = CCR1 - lastCCR1;
         lastCCR1 = CCR1;
         break;
case 4: break;
case 10: P1OUT ^= BIT0;
         break;
  }
}
#pragma vector = TIMER0_A0_VECTOR
__interrupt void TIMER_A0(void)
{
  if(SCCI == 0)
  {
k = CCR0 - lastCCR0;
lastCCR0 = CCR0;
  }
}
麻烦帮忙看下，定时器溢出中断是可以的，但上升沿捕获发生时P1OUT ^= BIT6;并没有发生。