shumaguan.rar_报时数码管

#include<reg52.h> #define dat P0 #define seg P2 unsigned char hour,minute,second; bit timeflag; sbit keymh=P3^0; sbit keyml=P3^1; sbit keyhh=P3^2; sbit keyhl=P3^3; unsigned char code duan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; unsigned char code wei[]={0,1,2,3,4,5,6,7}; unsigned char temp[8]; void delayus(unsigned char t); void delayms(unsigned char t); void display(unsigned char firstbit,unsigned char num); void keyscan(); void init (); void main () { init ( ); while (1) { display(0,8); if(timeflag==1) { timeflag=0; temp[0]=duan[hour/10]; temp[1]=duan[hour%10]; temp[2]=0x40; temp[3]=duan[minute/10]; temp[4]=duan[minute%10]; temp[5]=0x40; temp[6]=duan[second/10]; temp[7]=duan[second%10]; } keyscan( ); } } void init ( ) { TMOD |= 0x01; EA=1; ET0=1; TR0=1; } void time ( ) interrupt 1 { static unsigned int num,i; TH0=(65536-50000)/256; TL0=(65536-50000)%256; display(0,8); i++; if(i==4) { i=0; timeflag=1; } num++; if(num==20) { num=0; second++; if(second==60) { second=0; minute++; if(minute==60) { minute=0; hour++; if(hour==24) hour=0; } } } } void keyscan( ) { keymh=1; keyml=1; keyhh=1; keyhl=1; if(!keymh) { delayms(10); if(!keymh) { while(!keymh) delayms(10); { if(minute<60) minute++; if(minute==60) minute=0; } } } if(!keyml) { delayms(10); if(!keyml) { while(!keyml) delayms(10); { if(minute>0) minute--; if(minute==0) minute=59; } } } if(!keyhh) { delayms(10); if(!keyhh) { while(!keyhh) delayms(10); { if(hour<24) hour++; if(hour==24) hour=0; } } } if(!keyhl) { delayms(10); if(!keyhl) { while(!keyhl) delayms(10); { if(hour>0) hour--; if(hour==0) hour=23; } } } } void display(unsigned char firstbit,unsigned char num) { static unsigned char i=0; dat=0; seg=wei[i+firstbit]; dat=temp[i]; i++; if(i==num) i=0; } void delayus(unsigned char t) { while(--t); } void delayms(unsigned char t) { while(t--) { delayus(245); delayus(245); } }