取得系统时间并以BCD形式保存到字符串中

  
    

   
     #include 
   
     <
   
     stdio.h
   
     >
   
     
#include 
   
     <
   
     time.h
   
     >
   
     


   
     #define
   
      HEX2BCD(x) (((x) % 10) + ((((x) / 10) % 10) << 4)) /*20 -> 20H*/
   
     

   
     #define
   
      UINT8 unsigned char
   
     


   
     /*
   
     
 功能：获取BCD时间
 out: [out] 保存获取到的BCD时间，格式为：秒分时日月年(各占一字节，BCD格式)

   
     */
   
     

   
     void
   
      getBCDTime(UINT8 
   
     *
   
     out
   
     )
{
 time_t t;
 
   
     int
   
      i 
   
     =
   
      
   
     0
   
     ;
 
   
     struct
   
      tm 
   
     *
   
     tp 
   
     =
   
      NULL;

 t 
   
     =
   
      time(NULL);
 tp 
   
     =
   
      localtime(
   
     &
   
     t);
 
   
     out
   
     [i
   
     ++
   
     ] 
   
     =
   
      HEX2BCD(tp
   
     ->
   
     tm_sec);
 
   
     out
   
     [i
   
     ++
   
     ] 
   
     =
   
      HEX2BCD(tp
   
     ->
   
     tm_min);
 
   
     out
   
     [i
   
     ++
   
     ] 
   
     =
   
      HEX2BCD(tp
   
     ->
   
     tm_hour);
 
   
     out
   
     [i
   
     ++
   
     ] 
   
     =
   
      HEX2BCD(tp
   
     ->
   
     tm_mday);
 
   
     out
   
     [i
   
     ++
   
     ] 
   
     =
   
      HEX2BCD(tp
   
     ->
   
     tm_mon
   
     +
   
     1
   
     );
 
   
     out
   
     [i
   
     ++
   
     ] 
   
     =
   
      HEX2BCD(tp
   
     ->
   
     tm_year
   
     -
   
     100
   
     );
}


   
     int
   
      main()
{
 UINT8 
   
     out
   
     [
   
     6
   
     ] 
   
     =
   
      {
   
     0
   
     };
 
   
     int
   
      i 
   
     =
   
      
   
     0
   
     ;
 getBCDTime(
   
     out
   
     );

 
   
     while
   
     (i 
   
     <
   
      
   
     6
   
     )
 {
 printf(
   
     "
   
     %.2X 
   
     "
   
     , 
   
     out
   
     [i
   
     ++
   
     ]);
 }
 printf(
   
     "
   
     \n
   
     "
   
     );

 
   
     return
   
      
   
     0
   
     ;
}