#include <reg52.h>
#include "rc500.h"

char ChangeCodeKey(uchar *uncoded,uchar *coded)
{
   uchar idata cnt=0;
   uchar idata ln=0;
   uchar idata hn=0;

   for(cnt=0;cnt<6;cnt++)
   {
      ln=uncoded[cnt]&0x0F;
      hn=uncoded[cnt]>>4;
      coded[cnt*2+1]=(~ln<<4)|ln;
      coded[cnt*2]=(~hn<<4)|hn;
   }
   return MI_OK;
}