void Encoder_Exe(void)
{
  static char biphase;
  register char tmp1 = 0;
  if(Pin_ENC_F1) tmp1  = 0x40;
  if(Pin_ENC_F2) tmp1 |= 0x80;
  if((tmp1 & 0xC0) == (biphase & 0xC0)) return;

  if(!(tmp1 & 0x40))
  {
    if(tmp1 == 0)
    {
      if(biphase == 0xB4)
        Keyboard_SetCode(ENC_DN);
    }
    else
    {
      if(biphase == 0x1E)
        Keyboard_SetCode(ENC_UP);
    }
  }
  biphase >>= 2;
  biphase |= tmp1;
}