addrdeal.c

来自「采用430单片机完成的门禁控制器程序」· C语言 代码 · 共 44 行

//------------------------------------------------------------------------------
//data convert
//------------------------------------------------------------------------------ 
uchar addrcon(uchar address)
{
  uchar i,j,nTemp;
  nTemp=0;
  for(i=8;i>0;i--)
  {
    j =address & 0x01;
    if(j==1)
    {
      nTemp |=1<<(i-1);
    }
    address >>=1;
  }
  return nTemp;
}
//------------------------------------------------------------------------------
// 读取设备地址
//------------------------------------------------------------------------------ 
void ADDRMK()
{
  uchar i;
  P3OUT &=~ALE;
  for(i=0;i<10;i++)
  {
    addr =P2IN;
    addr =~addr;
    addr&=0xff;
  } 
  if(addr & 0x80)
  {
    FLAG |= gb_card;
  }
  addr1 = (addr>>4)&0x07;
  addr &= 0x0f;
  addr  = c_hex(addr);
  addr1 = c_hex(addr1);
  P3OUT |=ALE;
  P2DIR |=0X3F;
  P2OUT =0XFF;
}