2 流水灯轮流闪烁

程序设计：

#include void delay(unsigned int n) {

do(n--); while(n!=0); }

void main()

{WDTCTL=WDTPW+WDTHOLD; P2DIR=0xff; P2OUT=0xfe; while(1)

{ delay(30000); P2OUT<<=1;

P2OUT|=0x01; if(P2OUT==0X7f) { delay(30000); P2OUT=0xfe; } } }

实验结果：

3 数码管0~7显示

程序设计：

#include typedef unsigned char uchar; #define wei_h P5OUT|= BIT5 #define wei_l P5OUT&= ~BIT5

#define duan_l P6OUT &= ~BIT6 #define duan_h P6OUT |= BIT6 //数码管7位段码：0--f

uchar scandata[8] = {0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, 0x7f}; uchar cnt = 0; void main(void) {

/*下面六行程序关闭所有的IO口*/ P1DIR = 0XFF;P1OUT = 0XFF; P2DIR = 0XFF;P2OUT = 0XFF;

P3DIR = 0XFF;P3OUT = 0XFF; P4DIR = 0XFF;P4OUT = 0XFF; P5DIR = 0XFF;P5OUT = 0XFF; P6DIR = 0XFF;P6OUT = 0XFF;

WDTCTL = WDT_ADLY_1_9; // 设置内部看门狗工作在定时器模式，1.9ms中断一次 IE1 |= WDTIE; // 使能看门狗中断 P6DIR |= BIT2;P6OUT |= BIT2; //关闭电平转换

_BIS_SR(LPM3_bits + GIE); //CPU进入LPM3低功耗模式，同时打开全局中断 }

#pragma vector=WDT_VECTOR

__interrupt void watchdog_timer(void)

{ P4OUT = scandata[cnt]; //输出段选信号 duan_h; duan_l;

P4OUT = ~(1 << cnt); //输出位选信号 wei_h;

wei_l;

cnt++; //位计数变量在0~5之间循环 if(cnt == 8) cnt = 0; }

实验结果：