【资源下载】下载地址如下：
https://docs.qq.com/doc/DTlRSd01BZXNpRUxl

 

#include<reg52.h>
#define uchar unsigned char 
#define	uint unsigned int 
#define T 100  	
sbit RES=P3^7;	
int S=0,M=30;
uchar count=0,ct=0;

uchar tab_d[10]={0X3F,0X06,0X5B,0X4F,0X66,	 //段码
0X6D,0X7D,0X07,0X7F,0X6F};
uchar tab_wei[8]={0xfe,0xfd,0xfb,0xf7,		 //位码
0xef,0xdf,0xbf,0x7f};

//延时函数
void delay(uint t)  // tms
{
	uchar i=0;
	while(t--)
	for(i;i<120;i++);
}

//数码管显示函数
void disp(uchar d,uchar x,uchar w)	//d为段选，x为小数点，w为位选
{
	P2=0xff; 	//位码选择	 只能先设置位码再设置段码