MSP430 LauchPad 按键中断调试问题,求解答

songtao0728

MSP430 LauchPad 按键中断调试问题,求解答 [复制链接]

 

下面是我在IAR IDE中编写的代码,仿真调试的时候发现,全速运行,按下按键相应的LED不会亮,如果在中断处设置一个断点,再全速运行,按下按键可以进中断.搞了一上午,高手给你解答.

 

#include<msp430g2231.h>

#pragma vector=PORT1_VECTOR
__interrupt void INT_P1(void){
  if(P1IN&(1<<3)){                    //断点设置在此处
          P1OUT |= (1<<0);
  } 
  P1IFG = 0;  
}

void main(void){

    WDTCTL = WDTPW + WDTHOLD;  //stop watchdog timer
    P1DIR |= (1<<0);  //set p1.0 is output low level.
    P1OUT &= ~(1<<0);
   
    P1IFG = 0;
   
    P1DIR &= ~(1<<3);   
    P1IE  |= (1<<3);
    P1IES |= (1<<3);
    _BIS_SR(GIE);
    while(1);
}