单片机源程序如下:
- #include "msp430f5529.h"
- long unsigned int n;
- void delay(unsigned int x)
- {
- int i,j;
- for(i=x;i>0;i--)
- for(j=110;j>0;j--);
- }
- #define K1 (P2IN & BIT1)
- int flag = 0,flag1 = 0;
- void main(void){
- WDTCTL=WDTPW+WDTHOLD; //关闭看门狗
- P1DIR = BIT0;
- P1OUT &= ~BIT0;// 灯暗
-
-
- P4DIR = BIT7;
- P4OUT &= ~BIT7;
- P2DIR &= ~BIT1; //将P2.1脚设置为输入方式
- P2OUT |= BIT1;
- P2REN |= BIT1; //设置为内部上拉
- P2IE |= BIT1; //P2.1中断使能
- P2IES |= BIT1; //置1，设置为下降沿触发
- P2IFG &= ~BIT1; //清除P2.1的中断标志位
-
- P1DIR &= ~BIT1; //将P2.1脚设置为输入方式
- P1OUT |= BIT1;
- P1REN |= BIT1; //设置为内部上拉
- P1IE |= BIT1; //P2.1中断使能
- P1IES |= BIT1; //置1，设置为下降沿触发
- P1IFG &= ~BIT1; //清除P2.1的中断标志位
-
- TA0CTL = TASSEL_2 + TACLR + MC_1;//设置定时器时钟源为SCMLK，8分频，允许置位，增计计数 //
- TA0CCTL0 = CCIE; //允许使能中断
- TA0CCR0 = 1060; //设置定时周期 1ms
- __bis_SR_register(LPM0_bits + GIE); //复位CPUOFF并打开SCMLK,开可屏蔽中断}//进入低功耗模式
-
- __enable_interrupt(); //开总中断
-
- while(1)
- {
-
- }
- }
- #pragma vector=TIMER0_A0_VECTOR
- __interrupt void Timer_A(void)
- {
- n++;
-
- if(n == 5000)//5s
- {
- flag1=1;
- n=0;
- }
- }
- #pragma vector=PORT2_VECTOR //固定格式，声明中断向量地址
- __interrupt void Port2_ISR(void) //中断子程序
- {
- if(flag1!=1)
- {
- __delay_cycles(100);
- while(K1 == 0);
- P1OUT ^= BIT0;
- P2IFG &= ~BIT1;
- P1IE &= ~BIT1;
- }
- else
- {
- P2IE &= ~BIT1;
- }
-
-
- }
- #pragma vector=PORT1_VECTOR //固定格式，声明中断向量地址
- __interrupt void Port1_ISR(void) //中断子程序
- {
- if(flag1!=1)
- {
- __delay_cycles(100);
- while((P1IN&BIT1) == 0);
- P4OUT ^= BIT7;
- P1IFG &= ~BIT1;
- P2IE &= ~BIT1;
- }
-
- else
- {
- P1IE &= ~BIT1;
- }
- }
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