基于AT89S52单片机数码管显示数字钟（含proteus仿真）

#include <reg51.h> unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71,0x40};//共阴数码管编码：0-f，最后是“-” unsigned char dispbitcode[]={0x07,0x06,0x05,0x04, 0x03,0x02,0x01,0x00}; //位选端 unsigned char dispbuf[8]={0,0,16,0,0,16,0,0};//初始状态：00-00-00 unsigned char dispbitcnt=0; unsigned char second=0; unsigned char minute=0; unsigned char hour; unsigned int tcnt; unsigned char mstcnt=0; unsigned char i,j; sbit P0_0=P0^0; sbit P0_1=P0^1; sbit P0_2=P0^2; sbit P0_7=P0^7; sbit P3_0=P3^0; sbit P3_4=P3^4; void main(void) { TMOD=0x02; TH0=0x06; TL0=0x06; TR0=1; ET0=1; EA=1; hour=0; P3_0=0; P0_7=0; while(1) { if(P0_0==0) { for(i=10;i>0;i--) for(j=248;j>0;j--); if(P0_0==0) { second++; if(second==60) { second=0; } dispbuf[0]=second%10; dispbuf[1]=second/10; while(P0_0==0); } } if(P0_1==0) { for(i=10;i>0;i--) for(j=248;j>0;j--); if(P0_1==0) { minute++; if(minute==60) { minute=0; } dispbuf[3]=minute%10; dispbuf[4]=minute/10; while(P0_1==0); } } if(P0_2==0) { for(i=10;i>0;i--) for(j=248;j>0;j--); if(P0_2==0) { hour++; if(hour==24) { hour=0; } dispbuf[6]=hour%10; dispbuf[7]=hour/10; while(P0_2==0); } } } } void t0(void) interrupt 1 using 0 { mstcnt++; if(mstcnt==8) { mstcnt=0; P3_0=1; P2=dispcode[dispbuf[dispbitcnt]]; P3_0=0; P1=dispbitcode[dispbitcnt]; dispbitcnt++; if(dispbitcnt==8) { dispbitcnt=0; } } tcnt++; if(tcnt==4000) { tcnt=0; second++; if((second==54)&&(minute==59)) P3_4=0; if(second==59) P3_4=1; if(second==60) { second=0; minute++; if(minute==60) { minute=0; hour++; if(hour==24) { hour=0; } } } dispbuf[0]=second%10; dispbuf[1]=second/10; dispbuf[3]=minute%10; dispbuf[4]=minute/10; dispbuf[6]=hour%10; dispbuf[7]=hour/10; } }