#ifndef  uint
#define uint   unsigned int
#endif

#define  ds1302_set0(x)  x=0
#define  ds1302_set1(x)  x=1

sbit  ds1302_rst=P1^0;
sbit  ds1302_sclk=P1^1;
sbit  ds1302_io=P1^2;

void   ds1302_initial();
void   ds1302_senddata(uchar  dsend);
uchar   ds1302_receivedata(void);

void ds1302_initial()
{
  ds1302_set0(ds1302_rst);
  ds1302_set0(ds1302_sclk);
  ds1302_set0(ds1302_io);
}

void ds1302_senddata(uchar  dsend)
{  
  uchar i;
  for(i=0;i<8;i++)
  {
    ds1302_set0(ds1302_sclk);
    ds1302_io=(bit)(dsend&0x01);
    ds1302_set1(ds1302_sclk);
    dsend=dsend>>1;    
  }
}
uchar ds1302_receivedata(void)
{
  uchar i,dat=0;
  for(i=0;i<8;i++)
  {
    dat=dat>>1;
    ds1302_set0(ds1302_sclk);
    if(ds1302_io)  dat=dat|0x80;
    else      dat=dat&0x7f;
    ds1302_set1(ds1302_sclk);
  }  
  return  dat;
}
/*DS1302驱动结束******************************************/