51单片机实现时钟

四年前写的程序了，纪念一下曾经玩过的单片机

 #include "IAP15F2K61S2.h"#include "delay.h"sbit seg1 = P2^7;sbit seg2 = P2^6;sbit seg3 = P2^5;sbit seg4 = P2^4;sbit seg5 = P2^3;sbit seg6 = P2^2;sbit seg7 = P2^1;sbit seg8 = P2^0;unsigned int  n      = 0; //定时器计数unsigned char hour   = 0;unsigned char minute = 0;unsigned char second = 0;unsigned char code Num[12] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf,0xff};unsigned char   Display[8] = {11,11,10,11,11,10,11,11};void Init_timer(){ TMOD = 0x02;        //方式二 TH0  = 0x06;          //赋初值（255-6=250） TL0  = 0x06; EA   = 1;                //打开总中断 ET0  = 1;               //打开定时器0中断 TR0  = 1;              //启动定时器0}void SEG_Display(){ seg1 = 0; P0 = Num[Display[0]]; Delay1ms(); seg1 = 1; P0=0xff; seg2 = 0; P0 = Num[Display[1]]; Delay1ms(); seg2 = 1; P0=0xff; seg3 = 0; P0 = Num[Display[2]]; Delay1ms(); seg3 = 1; P0=0xff; seg4 = 0; P0 = Num[Display[3]]; Delay1ms(); seg4 = 1; P0=0xff; seg5 = 0; P0 = Num[Display[4]]; Delay1ms(); seg5 = 1; P0=0xff; seg6 = 0; P0 = Num[Display[5]]; Delay1ms(); seg6 = 1; P0=0xff; seg7 = 0; P0 = Num[Display[6]]; Delay1ms(); seg7 = 1; P0=0xff; seg8 = 0; P0 = Num[Display[7]]; Delay1ms(); seg8 = 1; P0=0xff; }void Clock_Run(){ Display[0] = hour   / 10;  Display[1] = hour   % 10; Display[3] = minute / 10;  Display[4] = minute % 10; Display[6] = second / 10;  Display[7] = second % 10; }int main(){ Init_timer();  while(1) {  if(n>4000)   {   n = 0;   second++;   if(second == 60)   {    second = 0;     minute++;    if(minute ==60)    {     minute = 0;     hour++;     if(hour == 24)     {      hour = 0;     }    }   }  }  Clock_Run();  SEG_Display(); } return 0;}void Tomer0() interrupt 1{ n++;}