MSP430G2231无法进入P1口外部中断

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楼主 | 2020-12-3 09:36 | 只看该作者回帖奖励

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外部中断, MSP430G2231, VECTOR, While, AI

求帮忙！！！为什么我的LAUNCHPAD 进不了P1口的外部中断程序？？
P1口中断和全局中断全部都打开了
部分程序如下：
..........
P1DIR &= ~BIT3;
P1DIR &= ~BIT4;
P1DIR &= ~BIT5;
P1DIR &= ~BIT7;
P1OUT |= BIT3+BIT4+BIT5+BIT7;
P1REN = 0;
P1REN |= BIT3+BIT4+BIT5+BIT7;
P1IE = 0;
P1IES = 0;
P1IE |= BIT3;
P1IE |= BIT4;
P1IE |= BIT5;
P1IE |= BIT7;
P1IES |= BIT3;
P1IES |= BIT4;
P1IES |= BIT5;
P1IES |= BIT7;
P1IFG = 0;
_BIS_SR(LPM1_bits + GIE);
_EINT();
while (1);
}                                                                         //main函数
#pragma vector=PORT1_VECTOR
__interrupt void P1_ISR(void)
  {
if (P1IFG & BIT3 == BIT3)
{
   while(!(P1IFG&BIT3))
   {
   LPM1_EXIT;
   P1OUT |= BIT6;
   for(i=0;i<1000;i++)P1OUT &= ~BIT6;
   P1IFG &= ~BIT3;
   }
   return;
}
... ... ... ... ... ... ...

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