//********鍵盤掃描**********8
sbit System=p1.0;
sbit TimeUp=p1.1;
sbit TimeDown=p1.2;
sbit Exit=p1.3;
//*******按鍵掃描程序****
void keyscan()
{
if(System ==0)
{
   delay5ms();
   if(System==0)
   {
    while(!System);
    delay5ms();
    while(!System); 
    keynum++;
    if(keynum==1)                        //按下控制鍵一次
    {
     TR0=0;
     L1602_WriteCmd(0x80+0x40+10);   //秒針閃動
     L1602_WriteCmd(0x0f);
    }
   if(keynum==2)                        //按下控制鍵兩次
    {
     L1602_WriteCmd(0x80+0x40+7);    //分針閃動
     L1602_WriteCmd(0x0f);
      }
    if(keynum==3)                        //按下控制鍵三次
    {
     L1602_WriteCmd(0x80+0x40+4);     //時針閃動
     L1602_WriteCmd(0x0f);
    }
   if(keynum==4)                         //按下控制鍵四次 
   { 
     L1602_WriteCmd(0x80+12);          //星期閃動
     L1602_WriteCmd(0x0f);
    }
  if(keynum==5)                     //按下控制鍵五次
    {
     L1602_WriteCmd(0x80+9);      //日閃動
     L1602_WriteCmd(0x0f);
    }
  if(keynum==6)                     //按下控制鍵六次 
   { 
     L1602_WriteCmd(0x80+6);      //月閃動
     L1602_WriteCmd(0x0f);
    }
  if(keynum==7)                     //按下控制鍵七次 
   { 
     L1602_WriteCmd(0x80+3);     //年閃動
     L1602_WriteCmd(0x0f);
    }
  }
if(Exit==0)                           //按下退出鍵
 {
   TR0=1;
   keynum=0;
   L1602_WriteCmd(0x0c);           //停止閃動閃動，時間走
 } 
}
if(keynum!=0)                         //處于調整狀態時，進行加減判斷和處理
{
if(TimeUp==0)                     //加鍵控制
 {
   Delay5ms();
   if(TimeUp==0)
     {
        while(!TimeUp);
      delay5ms();
      while(!TimeUp);
      if(keynum==1)                         //秒加
      {
      ptm.second ++;
       if(ptm.second ==60)
{ptm.second =0; }
PCF8563_write_time(*ptm);
}
      if(keynum==2)                           //分加
         {
      ptm.minute++;
     if(ptm.minute ==60)
      {ptm.minute=0;}
      PCF8563_write_time(*ptm);
     }
     if(keynum==3)                        //時加
 {
   ptm.hour++;
   if(ptm.hour==24)
   {ptm.hour=0;}
   PCF8563_write_time(*ptm);
 }
if(keynum==4)                             //星期加
{
 ptm.weekday++;
 if(ptm.weekday==8)
{ptm.weekday=1;}
  PCF8563_write_time(*ptm);
}
if(keynum==5)                             //日加
 {
  ptm.day ++;
  if(ptm.day ==31)
  ptm.day =1;
  PCF8563_write_time(*ptm);
 }
if(keynum==6)                            //月加
 {
 ptm.mon ++;
 if(ptm.mon ==13)
 ptm.mon =1;
 PCF8563_write_time(*ptm);
 }
if(keynum==7)                           //年加
 {
  ptm.year++;
  if(ptm.year==100)
  ptm.year=0;
  PCF8563_write_time(*ptm);
  }
}
   if(TimeDown==0)                                // 減控制鍵 
{
   Delay5ms();
   if(TimeDown ==0)
    {
  while(!TimeDown);
  delay5ms();
  while(!TimeDown);
  if(keynum==1)                       //秒減
   {
     ptm.second--;
     if(ptm.second==-1)
     ptm.second=59;
    PCF8563_write_time(*ptm); 
   }
  if(keynum==2)                      //分減
  {
   ptm.minute--;
   if(ptm.minute==-1)
   ptm.minute=59;
   PCF8563_write_time(*ptm);
   }
 if(keynum==3)                       //時減
  {
   ptm.hour--;
   if(ptm.hour==-1)
   ptm.hour=23;
   PCF8563_write_time(*ptm);
  }
if(keynum==4)                         //星期減
 {
  ptm.weekday--;
  if(ptm.weekday==0)
  ptm.weekday=7;
  PCF8563_write_time(*ptm);
 }
if(keynum==5)                         //日減
 {
   ptm.day--;
   if(ptm.day==0)
   ptm.day=30;
   PCF8563_write_time(*ptm);
 }
if(keynum==6) 					//月減
 {
   ptm.mon--;
   if(ptm.mon==0)
   ptm.mon=12;
   PCF8563_write_time(*ptm); 
  }
if(keynum==7)    					//年減
 {
  ptm.year--;
  if(ptm.year==-1)
  ptm.year=99;
  PCF8563_write_time(*ptm);
 }
}
}
}