DS1302怎么设置多组闹钟

DS1302怎么设置多组闹
谁做过用DS1302做闹钟，可以设置多个闹铃。
我这样做行不行，请指导一下：
if(s5==0&&s1num==0)
{
      s5num++;
      flag2=1;
      while(!s5);baojing();
      if(s5num==1)
      {                                                                                           write_com(0x80+13);
                  write_com(0x0f);//光标
      }
   if(s5num==2)
   {
            write_1302(0x8e,0x00);//禁止写保护，第一组闹铃分钟
            write_1302(0xc2,lfen);//闹钟初始化
               write_1302(0x8e,0x80);//开写保护
            write_com(0x80+10);
   }
      if(s5num==3)
      {
      write_1302(0x8e,0x00);//禁止写保护
   write_1302(0xc0,lshi);//闹钟初始化
      write_1302(0x8e,0x80);//开写保护
      write_com(0xc0+2);
   }
      if(s5num==4)
      {
      write_1302(0x8e,0x00);//禁止写保护，第二组闹铃
      write_1302(0xc4,eshi);//闹钟初始化
      write_1302(0x8e,0x80);//开写保护
      write_com(0xc0+5);
      }
if(s5num==5)
      {
            write_1302(0x8e,0x00);//禁止写保护
            write_1302(0xc6,efen);//闹钟初始化
      write_1302(0x8e,0x80);//开写保护
      write_com(0xc0+7);
      }
if(s5num==6)
{
            write_1302(0x8e,0x00);//禁止写保护
      write_1302(0xc8,sshi);//闹钟初始化
      write_1302(0x8e,0x80);//开写保护
      write_com(0xc0+10);
   }
      if(s5num==7)
            {
            write_1302(0x8e,0x00);//禁止写保护
               write_1302(0xca,sfen);//闹钟初始化
            write_1302(0x8e,0x80);//开写保护
            write_com(0xc0+12);
            }
      if(s5num==8)
      {
            write_1302(0x8e,0x00);//禁止写保护
      write_1302(0xcc,sishi);//闹钟初始化
   write_1302(0x8e,0x80);//开写保护
            write_com(0xc0+15);
      }
if(s5num==9)
      {
            s5num=0;
      flag2=0;
      write_1302(0x8e,0x00);//禁止写保护
      write_1302(0xce,sifen);//闹钟初始化
      write_1302(0x8e,0x80);//开写保护
      write_com(0x0c);//不显示光标
                                    }
                        }
            }
      /***********************以下是加减*************************/
                     if(s5num!=0&&s1num==0)
                     {
                              if(s2==0)
                              {
                                    delay(5);
                                    if(s2==0)
                                    {
                                             while(!s2);baojing();
                                             if(s5num==1)
                                             {
                                                      uchar *fff1=&lfen;
                                                      fenjia(fff1,12,0x80+13);
                        }
                                             if(s5num==2)
                                             {
                                                      uchar *sss1=&lshi;
                                                      shijia(sss1,9,0x80+10);
                                             }
                                             if(s5num==4)
                                             {
                                                      uchar *sss2=&eshi;
                                                      shijia(sss2,1,0xc0+2);
                        }
                                             if(s5num==4)
                                             {
                                                      uchar *fff2=&efen;
                                                      fenjia(fff2,4,0xc0+5);
                                             }
                                             if(s5num==5)
                                             {
                                                      uchar *sss1=&sshi;
                                                      shijia(sss1,9,0xc0+10);
                        }
                                             if(s5num==6)
                                             {
                                                      uchar *fff1=&sfen;
                                                      fenjia(fff1,12,0xc0+13);
                                             }
                                             if(s5num==7)
                                             {
                                                      uchar *sss1=&sishi;
                                                      shijia(sss1,9,0xc0+10);
                        }
                                             if(s5num==8)
                                             {
                                                      uchar *fff1=&sifen;
                                                      fenjia(fff1,12,0xc0+13);
                                             }
                     }
                              }