電路很簡單我就不畫了，是stc系列的單片機做的，顯示部分就是2個74hc573芯片連到P1口，然后用p3.0控制段選，按鍵的定義程序里有說明。很容易就能搭出來，下圖是效果圖，自己用萬用板焊的，技術不行。到處都是飛線呵呵，請大家多多指教
程序的c51語言完整版本的下載地址：http://www.zg4o1577.cn/f/biaoc4.rar
#include<stc90.h>
#define uchar unsigned char
#define uint unsigned int
uchar d0,ss,gs,sf,gf,sm,gm;
uchar e1,e2,e3,e4,e5,e6;
uchar s1,q1;
uchar shi,fen,miao;
// 8 4 2 1 8 4 2 1
// h g f e d c b a
//效正 累加數98 跑1320秒 實際1316
//當前已走秒數 乘以 當前累加數 除以除以實際秒數 等于 累加數應得值
uchar code num[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x80};//0-9 點
uchar code wes[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0x7f};//1-8位
sbit dua=P3^0;
sbit laba=P3^1;
sbit a1=P3^2;//時間設置
sbit a2=P3^3;//鬧鐘設置
sbit a3=P3^4;//按鍵+
sbit a4=P3^5;//按鍵-
sbit a5=P3^7;//返回 啟動鬧鐘
void weiduan(uchar z,uchar x); //位段 函數
void chushi(); //初始化函數
void shijian(); //時間顯示函數
void shjianbata();//測試時間函數
void shezhi(); //時間設置函數
void naozhong(); //鬧鐘這是函數
void shu(); //時間最大值限制函數
void delay(uchar d1);//延時函數
//.....................................................................................
void main()
{ chushi(); //初始化時間
TH0=(65535-40000)/256;//定時器裝初值
TL0=(65535-40000)%256;
ET0=1;//開定時器0中斷
TR0=1;//啟動定時器0
EA=1; //打開總中斷
laba=1;
while(1)
{
shijian(); //調用時間顯示函數 顯示時間
if(a1==1){if(a2==1){if(a3==1){if(a4==1){ weiduan(1,10);delay(5);weiduan(3,10);delay(5);weiduan(5,10);delay(5); }}}}
if(a1==0){delay(100);if(a1==0){shezhi();}}
if(a2==0){delay(100);if(a2==0){naozhong();}}//調用鬧鐘設置函數
if(a5==0){delay(100);{if(a5==0){while(1){if(q1==0){q1=1;break;}else{q1=0;break;}}while(a5==0);delay(100);}}}
if(a2==0){delay(100);if(a2==0){naozhong();} }
if(q1==1){weiduan(6,0);delay(20);if(fen==e2){if(shi==e1){laba=0;}}if(fen!=e2){laba=1;} }
else{laba=1;}
}
}
//.....................................................................................
void naozhong()
{while(1)
{ ss=e1/10;
gs=e1%10;
sf=e2/10;
gf=e2%10;
sm=e3/10;
gm=e3%10;
delay(10);
weiduan(0,ss);delay(10);
weiduan(1,gs);delay(10);
weiduan(2,sf);delay(10);
weiduan(3,gf);delay(10);
weiduan(4,sm);delay(10);
weiduan(5,gm);delay(10);
if(a1==0){delay(100);if(a1==0){while(a1==0);delay(20);break;}}
if(a2==0){delay(100);while(a2==0);delay(20);s1++;}
if(s1==3){s1=0;}
if(s1==1){weiduan(0,10);delay(5);weiduan(1,10);delay(5);
if(a3==0){delay(20);if(a3==0){e1++;}while(a3==0);delay(100);}
if(a4==0){delay(20);if(a4==0){e1--;}while(a4==0);delay(100);}
}
if(s1==2){weiduan(2,10);delay(5);weiduan(3,10);delay(5);
if(a3==0){delay(20);if(a3==0){e2++;}while(a3==0);delay(100);}
if(a4==0){delay(20);if(a4==0){e2--;}while(a4==0);delay(100);}
}
if(s1==0){weiduan(4,10);delay(5);weiduan(5,10);delay(5);
if(a3==0){delay(20);if(a3==0){e3++;}while(a3==0);delay(100);}
if(a4==0){delay(20);if(a4==0){e3--;}while(a4==0);delay(100);}
}
}
}
//.....................................................................................
void shezhi()//時間設置函數
{while(1)
{
ss=shi/10;
gs=shi%10;
sf=fen/10;
gf=fen%10;
sm=miao/10;
gm=miao%10;
shijian();
if(a2==0){delay(100);if(a2==0){while(a2==0);delay(20);break;}}
if(a1==0){delay(100);while(a1==0);delay(20);s1++;}
if(s1==3){s1=0;}
if(s1==1){weiduan(0,10);delay(5);weiduan(1,10);delay(5);
if(a3==0){delay(20);if(a3==0){shi++;}while(a3==0);delay(100);}
if(a4==0){delay(20);if(a4==0){shi--;}while(a4==0);delay(100);}
}
if(s1==2){weiduan(2,10);delay(5);weiduan(3,10);delay(5);
if(a3==0){delay(20);if(a3==0){fen++;}while(a3==0);delay(100);}
if(a4==0){delay(20);if(a4==0){fen--;}while(a4==0);delay(100);}
}
if(s1==0){weiduan(4,10);delay(5);weiduan(5,10);delay(5);
if(a3==0){delay(20);if(a3==0){miao++;}while(a3==0);delay(100);}
if(a4==0){delay(20);if(a4==0){miao--;}while(a4==0);delay(100);}
}
}}
//.....................................................................................
void zhongduan() interrupt 1 //定時器中斷函數體
{ TH0=(65535-40400)/256;
TL0=(65535-40400)%256;
if(e3>=60)//判斷秒等于或超過60
{e2++; //分鐘加1
e3=0;} //秒數清零
if(e2>=60) //判斷分鐘等于或超過60
{e1++; //小時加1
e2=0;} //分鐘數清零
if(e1>=24) //判斷小時等于或大于24
{e1=0;} //小時數 清零
d0++;//累加數
shu(); //調用時間最大值限制函數
}
//.....................................................................................
void delay(uchar d1)//延時函數
{uchar t0,t1;
for(t0=d1;t0>0;t0--)
for(t1=110;t1>0;t1--);
}
//.....................................................................................
void weiduan(uchar z,uchar x) //位段選擇函數
{ P1=num[x];
dua=1;
dua=0;
P1=wes[z];
}
//.....................................................................................
void shijian()//動態掃描時間顯示函數 帶延時
{
chushi();//調用時間初始化函數
delay(10);
weiduan(0,ss);delay(10);
weiduan(1,gs);delay(10);
weiduan(2,sf);delay(10);
weiduan(3,gf);delay(10);
weiduan(4,sm);delay(10);
weiduan(5,gm);delay(10);
}
//.....................................................................................
void shu() //時間最大限制函數體
{ if(d0>=98) //判斷定時器進入 多少次
{d0=0; //清除累加數
miao++;} //秒數自+
if(miao>=60)//判斷秒等于或超過60
{fen++; //分鐘加1
miao=0;} //秒數清零
if(fen>=60) //判斷分鐘等于或超過60
{shi++; //小時加1
fen=0;} //分鐘數清零
if(shi>=24) //判斷小時等于或大于24
{shi=0;} //小時數 清零
}
//.....................................................................................
void chushi() //時間初始化
{ ss=shi/10;
gs=shi%10;
sf=fen/10;
gf=fen%10;
sm=miao/10;
gm=miao%10;
}
//.....................................................................................