基于单片机数码管秒表控制系统设计

#include <reg51.h>
#include <intrins.h> 
#define uchar  unsigned char
#define uint  unsigned int
//共阳极/*0,1,2,3,4,5,6,7,8,9,A,b,C,*/
uchar code SEG7[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6};
//显示缓冲
uchar num[4];
//位码定义
sbit      q4=P2^3;
sbit      q3=P2^2;
sbit      q2=P2^1;
sbit      q1=P2^0;
//按键定义1234
sbit key1=P3^0;
sbit key2=P3^1;
sbit key3=P3^2;
sbit key4=P3^3;
//通道
uchar aisle=0;
//通道运行标志
uchar bz1=0;
uchar bz2=0;
uchar bz3=0;
//定时变量
uint t1=0;
uint t2=0;
uint t3=0;
//定时器计数变量
uint  jishu1=0;
uint  jishu2=0;
uint  jishu3=0;
//延时函数ms
void _delay_ms(uint t)