用51单片机做一个LED显示的电子钟

#include
#define uchar unsigned char
#define uint unsigned int
uchar code table[]="ME-400-A clock";
uchar code table1[]="    --:--:--    ";
uchar code table2[]="ALL:00:00:-- ";
uchar code table3[]="    ";
uchar clk_time[3];  //秒，分，时寄存器初始值
sbit T_RST=P2^2;//ds1302-5
sbit T_IO=P2^3;//ds1302-6
sbit T_CLK=P2^4;//ds1302-7
sbit en=P2^5;     //参照LCD1602说明档，使能信号
sbit rw=P2^6;     //。。。。。。。。，读写信号端（输入高电频时为读，低电为写）
sbit rs=P2^7;     //。。。。。。。。，数据/命令选择端（H/L）
sbit led=P1^0;
sbit dula=P1^1;
sbit wela=P1^2;
sbit ACC0=ACC^0;
sbit ACC7=ACC^7;
sbit up=P3^3;
sbit down=P3^4;
sbit set=P3^2;
sbit did=P1^4;
uchar num,clock_ss,clock_sg,clock_fs,clock_fg,clock_ms,clock_mg,b,clock_s,clock_g;
char hour,mie,sei,c,nhour,nmie,shour,smie;
/******************DS1302：写入操作(上升沿)*********************/

void write_byte(uchar da)
{
   uchar i;
   ACC=da;
   for(i=8;i>0;i--)
   {
      T_IO=ACC0;
   T_CLK=0;    
      T_CLK=1;
      ACC=ACC>>1;
   }
}

/******************DS1302：读取操作（下降沿）*****************/
uchar read_byte(void)
{
   uchar i;
   for(i=0;i<8;i++)
   {
      ACC=ACC>>1;
   T_CLK = 1;
   T_CLK = 0;
      ACC7 = T_IO;
   }
   return(ACC);

}

/******************DS1302:写入数据（先送地址，再写数据）***************************/
void write_1302(uchar addr,uchar da)
{
   T_RST=0;    //停止工作
   T_CLK=0;                //只有在CLK为低电平时，才能将RST置为高电平,然后才能传输数据                
   T_RST=1;   //重新工作
   write_byte(addr);    //写入地址
  
   write_byte(da);
   T_RST=0;
   T_CLK=1;
}

/******************DS1302:读取数据（先送地址，再读数据）**************************/
uchar read_1302(uchar addr)
{
   uchar temp;
   T_RST=0;                                   //停止工作
   T_CLK=0; 
   T_RST=1;                         //重新工作
   write_byte(addr);   //写入地址
   temp=read_byte();
   T_RST=0;
   T_CLK=1;     //停止工作
   return(temp);
}

/***********************延时程序=a*1ms**************************************/
void delay(uint z)
{
 uint x,y;
 for(x=z;x>0;x--)
  for(y=110;y>0;y--);
}
void fn()
   {
             did=0;
    delay(120);
   did=1;
    delay(120);
       did=0;
    delay(120);
    did=1;
    delay(120);
             did=0;
    delay(120);
    did=1;
    delay(120);
             did=0;
    delay(320);
             did=1;
    delay(400);
   }
void write_com(uchar com)
{
    led=1;
 wela=1;
    P0=0xff;
    delay(1);
    led=0;
     wela=0;
    P0=0x00;
     dula=1;
     delay(1);
     dula=0;
    rs=0;
 P0=com;
 delay(5);
 en=1;
 delay(5);
 en=0;
}

void write_data(uchar date)
{
 led=1;
 wela=1;
    P0=0xff;
    delay(1);
    led=0;
     wela=0;
    P0=0x00;
     dula=1;
     delay(1);
     dula=0;
    rs=1;
 P0=date;
 delay(5);
 en=1;
 delay(5);
 en=0;
}
void morning()
  {   shour=clock_ss*10+clock_sg;
            smie=clock_fs*10+clock_fg;
    if(b==0)
     {
     if(nhour==shour)
     {
    if(smie>=nmie)
       {
      fn();
    }
         }
     }
 
 
  }
void init()
{  
    b=0;
    P0=0xff;
    delay(5);
    led=1;
    delay(5);
    P0=0xff;
    led=0;
 dula=0;
 wela=1;
     delay(5);
    wela=0;//关ME-400开发板数码管
 nhour=0;
 nmie=0;
    rw=0;
 en=0;
 write_com(0x38);//设置液晶
 write_com(0x0c);//设光标等
 write_com(0x06);//写一个字符地址指针加1且光标加1
 write_com(0x01);//清屏
 write_com(0x80);//设置s地址指针
}
void display(uchar add,date)
{      
   if(b==0)
     {
        clock_ms=clk_time[0]/ 16;  clock_mg=clk_time[0]%16;
        led=0;
        clock_fs=clk_time[1]/ 16;  clock_fg=clk_time[1]%16;
        led=0;
        clock_ss=clk_time[2]/ 16;   clock_sg=clk_time[2]%16;
       write_com(0x80+0x44);
       write_data(0x30+clock_ss);
       write_com(0x80+0x45);
       write_data(0x30+clock_sg);
       write_com(0x80+0x47);
       write_data(0x30+clock_fs);
       write_com(0x80+0x48);
       write_data(0x30+clock_fg);
       write_com(0x80+0x4a);
       write_data(0x30+clock_ms);
       write_com(0x80+0x4b);
       write_data(0x30+clock_mg);
 
     }
   if(b!=0)
     {
  clock_s=date/ 10;  clock_g=date%10;
        write_com(0x80+0x40+add);
        write_data(0x30+clock_s);
        write_data(0x30+clock_g);  
  }
 
}
void key()
 {
   uchar clock_s1, clock_s2, clock_f1, clock_f2;
   rw=0;

   if(set==0)
      {
  delay(10);
          if(set==0)
                {
           did=0;
               delay(10); did=1;
      b++;
         
          }
              while(!set);
    
        if(b==1)
  {
    hour=clock_ss*10+clock_sg;
            mie=clock_fs*10+clock_fg;
    write_com(0x80+0x45);
          write_com(0x0f);

  }
     if(b==2)
    {
      write_com(0x80+0x48);
           
 
    }
          if(b==3)
           {
    write_com(0x80+0x40);
    for(num=0;num<13;num++)
    {
     write_data(table2[num]);
    
    }

            
    write_com(0x80+0x45); display(4,nhour);write_com(0x80+0x45);
           }
     if(b==4)
      {

                     write_com(0x80+0x48);
                    display(7,nmie); write_com(0x80+0x48);

      }
     if(b==5)
    {
                 write_com(0x80+0x40);
    for(num=0;num<4;num++)
    {
     write_data(table3[num]);
    
    }
      write_com(0x80+0x45);
           write_com(0x0c);
            b=0;
     clock_s1=hour/10;//十进制转十六进制
           clock_s2=hour%10;//十进制转十六进制
           clock_s1=clock_s1&0xff;//十进制转十六进制
     clock_s2=clock_s2&0xff;//十进制转十六进制
           clock_s1<<=4;//十进制转十六进制
           clock_s1=clock_s1|clock_s2;//十进制转十六进制
     
           clock_f1=mie/10;//十进制转十六进制
           clock_f2=mie%10;//十进制转十六进制
           clock_f1=clock_f1&0xff; //全1出1 与运算
     clock_f2=clock_f2&0xff;//十进制转十六进制
           clock_f1<<=4;//十进制转十六进制
           clock_f1=clock_f1|clock_f2;//十进制转十六进制
   
    write_1302(0x8e,0x00);             //WP=0 写操作
    write_1302(0x80,0x00);//写秒
    write_1302(0x82,clock_f1);//写分
    write_1302(0x84,clock_s1);//写时
             write_1302(0x86,0x14);//写日
    write_1302(0x88,0x02);//写月
    write_1302(0x8a,0x06);//写星期
             write_1302(0x8c,0x09);
    write_1302(0x8e,0x80); //WP=1 写保护
 
   
            }  
        }
  if(b!=0)
      {
     if(up==0)
        {
       delay(10);
      if(up==0)
       {
         did=0;
                    delay(10);
                       did=1;
                         while(!up);
                     if(b==1)
        {
       
          hour++;
        if(hour>=24)
          {
        delay(1);
        hour=0;
       }
                           display(4,hour);
                   write_com(0x80+0x45);

      }
                  if(b==2)  
                     {
         mie++;

       if(mie>=60)
         {
       mie=0;
      }
           display(7,mie);
          write_com(0x80+0x48);
            }
                   if(b==3)
        {
       
          nhour++;
        if(nhour>=24)
          {
        delay(1);
        nhour=0;
       }
                           display(4,nhour);
                   write_com(0x80+0x45);

      }
                if(b==4)  
                     {
         nmie++;

       if(nmie>=60)
         {
       nmie=0;
      }
           display(7,nmie);
          write_com(0x80+0x48);
            }
       }
                
    }
   
   if(down==0)
        {
       delay(10);
      if(down==0)
       {
         did=0;
                     delay(10);
                       did=1;
                     while(!down);
                        if(b==1)
      {
        hour--;
        if(hour<0)
          {
 
         hour=23;
       }
                           display(4,hour);
          write_com(0x80+0x45);

      }
                        if(b==2)
                       { 
                             mie--;
            if(mie<0)
               {
                 mie=59;
            }
                    display(7,mie);
          write_com(0x80+0x48);
               }
                    if(b==3)
      {
        nhour--;
        if(nhour<0)
          {
 
         nhour=23;
       }
                           display(4,nhour);
          write_com(0x80+0x45);

      }
                        if(b==4)
                       { 
                             nmie--;
            if(nmie<0)
               {
                 nmie=59;
            }
                    display(7,nmie);
          write_com(0x80+0x48);
               }
    
                    }
  
           }
         }
        }          

void main()
{
   uchar  temp=0x80;         
   uchar i;
 init();
 for(num=0;num<14;num++)
 {
  write_data(table[num]);
  delay(100);
 }

 write_com(0x80+0x40); //  设置数据地址指针为0X40
 for(num=0;num<15;num++)
 {
  write_data(table1[num]);
 
 }
 /*for(num=0;num<16;num++)
 {
  write_com(0x18);
  delay(20);
 }*/
 write_1302(0x8e,0x00);
 write_1302(0x90,0xa4);
 write_1302(0x8e,0x80);
 while(1)
     {
   
    if(b==0)

   { temp=0x81;                   
      for(i=0;i<3;i++)
    {
      clk_time[i]=read_1302(temp);
   temp+=2;
   }
   display(0x4b,0x00);
   }
  
morning();
key();

  }
}