ds1302.txt

DS1302读写程序 源码 C语言,可能会对你有有所用处用

void write_ds1302(unsigned char Writeaddr,unsigned char Writedata)
{
 unsigned char i;

 TIMECLK=0;
 delayus(1);
 TIMERST=1;
 delayus(1);
 for(i=8;i>0;i--)
 {
  TIMECLK=0;
  TIMEDATA=Writeaddr&0x01;
  delayus(1);   //
  TIMECLK=1;
  Writeaddr=Writeaddr>>1;
 }

 for(i=8;i>0;i--)
 {
  TIMECLK=0;
  TIMEDATA=Writedata&0x01;
  delayus(1);   //
  TIMECLK=1;
  Writedata=Writedata>>1;
 }

 TIMERST=0;
 delayus(1);
 TIMECLK=0;
 delayus(1);
}

/****************************************************************************
从DS1302读出一个字节的数据
****************************************************************************/
unsigned char read_ds1302(unsigned char Readaddr)
{
 unsigned char i;
 unsigned char value=0;
 
 TIMECLK=0;
 delayus(2);
 TIMERST=1;
 delayus(2);
 
 for(i=8;i>0;i--)
 {
  TIMECLK=0;         //0   
  TIMEDATA=Readaddr&0x01;
  delayus(1);          //
  TIMECLK=1;
  Readaddr=Readaddr>>1;
 }

 for(i=8;i>0;i--)
 {
  value=value>>1;
  TIMECLK=1;
  delayus(1);              //
  TIMECLK=0;
  if(TIMEDATA==1)
  {
   value=value|0x80;
  }
  delayus(1);
 }

 TIMERST=0;
 delayus(1);
 TIMECLK=0;
 delayus(1);

 return value;
}

/****************************************************************************
DS1302初始化
****************************************************************************/
void init_ds1302(void)
{
 if(read_ds1302(0x0cd)!=0x01)
 {
  TIMECLK=0;
  TIMERST=0;

  write_ds1302(0x8e,0x00);

  write_ds1302(0x82,INIT_MINUTE);
  write_ds1302(0x84,INIT_HOUR);
  write_ds1302(0x86,INIT_DAY);
  write_ds1302(0x88,INIT_MONTH);
  write_ds1302(0x8a,INIT_WEEK);
  write_ds1302(0x8c,INIT_YEAR);

  write_ds1302(0x90,0xa6);
  write_ds1302(0x0cc,0x01);
  write_ds1302(0x80,INIT_SECOND);
 }
}
/***********************************************************/
display_time()
         {
          uccurtime[0]=read_ds1302(0x81);    //秒 
          disp_time();
          uccurtime[1]=read_ds1302(0x83);    //分
          disp_time(); 
          uccurtime[2]=read_ds1302(0x85);    //时
          disp_time();
          uccurtime[3]=read_ds1302(0x87);    //日
          disp_time();
          uccurtime[4]=read_ds1302(0x89);    //月
          disp_time();
          uccurtime[5]=read_ds1302(0x8d);    //年
          disp_time();
          uccurtime[6]=read_ds1302(0x8b);    //周
          disp_time();
         // delay100ms();
         // delay100ms();   
        //  delay100ms();      
         }