秒表（经典设计）

#include <reg51.h> #include <absacc.h> #define a8255 XBYTE[0x1b00] #define b8255 XBYTE[0x1b01] #define c8255 XBYTE[0x1b02] #define com8255 XBYTE[0x1b03] char min,sec,dsec,a,b,c; char n[11]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}; char count; bit flag; bit flag1; sbit p10=P1^0; sbit p11=P1^1; void delay(void) { char k; for (k=0;k<99;k++); } void display(int m,int s,int ds) //显示程序 { char m1,m2,s1,s2,i; m1=m2=s1=s2=0; if(m>0){m2=m%10;m/=10;} if(m>0) m1=m%10; if(s>0){s2=s%10;s/=10;} if(s>0) s1=s%10; b8255=0xff; for(i=0;i<7;i++) { switch(i) { case 0:b8255=0xfe;a8255=n[m1];delay(); case 1:b8255=0xfd;a8255=n[m2];delay(); case 2:b8255=0xfb;a8255=n[10];delay(); case 3:b8255=0xf7;a8255=n[s1];delay(); case 4:b8255=0xef;a8255=n[s2];delay(); case 5:b8255=0xdf;a8255=n[10];delay(); case 6:b8255=0xbf;a8255=n[ds];delay(); } } } void initial(void) { com8255=0x80; TMOD=0x01; IT0=1; EA=1; ET0=1; EX0=1; min=0; sec=0; dsec=0; a=0; b=0; c=0; flag=0; flag1=0; } void main(void) { initial(); while(1) { if(!flag1) display(min,sec,dsec); else display(a,b,c); } } void st(void) //秒表启动停止控制 { flag=!flag; if (flag) { TH0=-50000/256; TL0=-50000%256; TR0=1; } if(!flag) { if(flag1==1) { min=0; sec=0; dsec=0; count=0; flag1=0; TR0=0; } else TR0=0; flag=0; } } void lock(void) //数码管数字锁定 { if(flag==1) { a=min; b=sec; c=dsec; flag1=!flag1; } } void T0_serv(void) interrupt 1 using 1 //定时器T0每0。1秒产生一次中断 { TH0=-50000/256; TL0=-50000%256; TR0=1; count++; dsec=count; if(count>9) { sec++; count=0; dsec=0; } if(sec>59) { min++; sec=0; } } void INT0_serv(void) interrupt 0 using 1 //按键中断处理 { if(p10==0&&p11==1) st(); if(p10==1&&p11==0) lock(); }