基于msp430g2553按键

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基于msp430g2553按键 [复制链接]

#include "msp430g2553.h"
void main()
{
  // Stop watchdog timer to prevent time out reset
        WDTCTL = WDTPW + WDTHOLD;
        //主系统时钟切换为外部高速晶振  
 if (CALBC1_8MHZ == 0xFF || CALDCO_8MHZ == 0xFF)
 {
     while(1);   // If calibration constants erased, trap CPU!!
 }
 // Configure Basic Clock
 BCSCTL1 = CALBC1_8MHZ;     // Set range
 DCOCTL = CALDCO_8MHZ;    // Set DCO step + modulation
 BCSCTL3 |= LFXT1S_2;    // Set LFXT1
    
     P1DIR &=~BIT3;              //定义P1.3按键
     P1DIR|=BIT0;              //定义P1.0led
    
     P1REN |=BIT3;//上拉电阻
     while(1)
     {
         if(!(P1IN & 0X08))           //判断P1.3按键是否按下
        {
          __delay_cycles(5000);//延时消抖
          if(!(P1IN & 0X08))
          {
            while(!(P1IN & 0X08));//松手检测
            P1OUT^=BIT0;          
          }
        }  

     }    
}