求解基于DS1302的数字时钟设计的按键修改

 
}
void write_data(uchar date)
{
 lcdrs=1;
 delay(5);
 P0=date;
 lcde=1;
 delay(5);
 lcde=0;

 
}
void  write_sfm(uchar add,uchar date) //shuaxinghanshu
{
 uchar shi,ge;
 shi=date/10;
 ge=date%10;
 write_com(0x80+0x40+add);
 write_data(0x30+shi);
 write_data(0x30+ge);
}
void DS1302InputByte(unsigned char d)  //实时时钟写入一字节(内部函数)
{
    unsigned char i;
    ACC = d;
    for(i=8; i>0; i--)
    {
        DS1302_IO = ACC0;            //相当于汇编中的 RRC
        DS1302_CLK = 1;
        DS1302_CLK = 0;
        ACC = ACC >> 1;
    }
}

uchar DS1302OutputByte(void)  //实时时钟读取一字节(内部函数)
{
    uchar i;
    for(i=8; i>0; i--)
    {
        ACC = ACC >>1;            //相当于汇编中的 RRC
        ACC7 = DS1302_IO;
        DS1302_CLK = 1;
        DS1302_CLK = 0;
    }
    return(ACC);
}

void Write1302(unsigned char ucAddr, unsigned char ucDa) //ucAddr: DS1302地址, ucData: 要写的数据
{
    DS1302_RST = 0;
    DS1302_CLK = 0;
    DS1302_RST = 1;
    DS1302InputByte(ucAddr);        // 地址，命令
    DS1302InputByte(ucDa);        // 写1Byte数据
    DS1302_CLK = 1;
    DS1302_RST = 0;
}

uchar Read1302(uchar ucAddr) //读取DS1302某地址的数据
{
    uchar dat1,dat2;
    DS1302_RST = 0;
    DS1302_CLK = 0;
    DS1302_RST = 1;
    DS1302InputByte(ucAddr|0x01);        // 地址，命令
    dat1 = DS1302OutputByte();         // 读1Byte数据
    DS1302_CLK = 1;
    DS1302_RST = 0;
    dat2=dat1/16;                           //数据进制转换
    dat1=dat1%16;                         //十六进制转十进制
    dat1=dat1+dat2*10;

    return(dat1);
}
/*void DS1302_SetProtect(bit flag)        //是否写保护
{
 if(flag)
  Write1302(0x8E,0x10);
 else
  Write1302(0x8E,0x00);
} */

void keyscan()
{
 if(stop==0)
 { 
  delay(5);
  if(stop==0)
  {  biaozhi=1;
   while(!stop);
   flag++;
   
   if(flag==1)
   {
    
    write_com(0x80+0x40+0x08);
    write_com(0x0f);
   }
   if(flag==2)
   {
    
    write_com(0x80+0x40+0x05);
    write_com(0x0f);

   }
   if(flag==3)
   {
    
    write_com(0x80+0x40+0x02);
    write_com(0x0f);

   }
   if(flag==4)
   {
    flag=0;
    write_com(0x0c);
   
    biaozhi=0;
    
    Write1302(0x80,0x01); //使时钟暂停
    Write1302(0x8e,0x00);
    Write1302(0x84,xiaoshi);
    Write1302(0x8e,0x80);
         
    
    
   
                
    

   }
   
  }
  
 }
 if(flag!=0)
  {
   if(jia==0)
   {
    delay(5);
    if(jia==0)
    { 
     while(!jia);
     if(flag==1)
     {
      miao++;
      if(miao==60)
      miao=0;
      write_sfm(7,miao);
      write_com(0x80+0x40+7);
     }
     if(flag==2)
     {
      fen++;
      if(fen==60)
      fen=0;
      write_sfm(4,fen);
      write_com(0x80+0x40+4);
     } 
     if(flag==3)
     {
      xiaoshi++;
      if(xiaoshi==24)
      xiaoshi=0;
      write_sfm(1,xiaoshi);
      write_com(0x80+0x40+1);
     } 
     
    }  

   }
   if(jian==0)
   {
    delay(5);
    if(jian==0)
    {
     while(!jian);
     if(flag==1)
     {
      miao--;
      if(miao==-1)
      miao=59;
      write_sfm(7,miao);
      write_com(0x80+0x40+7);
     }
     if(flag==2)
     {
      fen--;
      if(fen==-1)
      fen=59;
      write_sfm(4,fen);
      write_com(0x80+0x40+4);
     } 
     if(flag==3)
     {
      xiaoshi--;
      if(xiaoshi==-1)
      xiaoshi=23;
      write_sfm(1,xiaoshi);
      write_com(0x80+0x40+1);
     } 
     
    }  

   }
  }
 }  

void init()
{    uchar j;
 write_com(0x38);
 write_com(0x0c);
 write_com(0x06);
 write_com(0x01);
 write_com(0x80);
 write_com(0x80+0x41) ;
 

  for( j=1;j<=8;j++)
 {
  write_data(table2[j]);
 }
// xiaoshi=1;
// fen=1;
// miao=1;
//  Write1302(0x80,miao);
//   Write1302(0x82,fen);
//    Write1302(0x84,xiaoshi);
   

}

void main()
{

 init();

 while(1)
 {
     keyscan();
 
    
      if(biaozhi==0)
    {
    
     miao=Read1302(DS1302_SECOND);
     
    
     fen=Read1302(DS1302_MINUTE);
    
     
     xiaoshi=Read1302(DS1302_HOUR);
    
     write_sfm(7,miao);
 
     write_sfm(4,fen);
     
     write_sfm(1,xiaoshi);
  
     }
   
 // keyscan();
 } 

}