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實時時鐘DS1302讀寫程序(C51)

實時時鐘DS1302讀寫程序(C51)

作者:佚名來源:不詳錄入:Admin 更新時間：2008-7-26 19:57:26 點擊數(shù)：3

【字體：

】

實時時鐘DS1302讀寫程序(C51)

我要EDA網(wǎng) 發(fā)布日期：2005-11-17 瀏覽次數(shù)：945

//´̣¿ªDS1302
void TimeSpiOpen(void)
{
  TIMECLK = 0;
  TIMERST = 0;//½ûÖ¹DS1302
  TIMEIO  = 1;//ÊÍ·ÅÊư¾Ư×ÜÏß
  TIMERST = 1;//Ê¹ÄÜDS1302
}

//¹Ø±ƠDS1302
void TimeSpiClose(void)
{
  TIMERST = 0;//½ûÖ¹DS1302
  TIMEIO  = 1;//ÊÍ·ÅÊư¾Ư×ÜÏß
  TIMECLK = 1;
}
//¶ÁĐ´DS1302
unsigned char TimeSpiReadWrite(unsigned char val)
{
unsigned char i;
  ACC = val;//È¡8Î»Êư¾Ư
  for (i = 8;i > 0; i--)
  {
    TIMECLK = 0;//Ê±ÖÓÏÂ½µÑØÊäÈëÊư¾Ư(DS1302¶Á)
    _nop_();//ÑÓÊ±
    CY = TIMEIO;//½ÓÊƠ´®ĐĐÊư¾Ưµ½CY
    _rrca_();//Ó̉̉Æ̉»Î»Êư¾Ưµ½CY(ÏÈ´æºóÈ¡)
    TIMEIO = CY;//·¢ËÍ´®ĐĐÊư¾Ư
    TIMECLK = 1;//Ê±ÖÓÉÏÉưÑØ´̣ÈëÊư¾Ư(DS1302Đ´)
    TIMEIO  = 1;//ÊÍ·ÅÊư¾Ư×ÜÏß
  }
  val = ACC;
  return val;
}

//¶ÁDS1302×Ö½Ú
unsigned char TimeByteRead(unsigned char address)
{
  TimeSpiOpen();//´̣¿ªDS1302
  TimeSpiReadWrite(address);//Đ´ÈëDS1302ĂüÁî
  address = TimeSpiReadWrite(0xff);//¶ÁÈëDS1302Êư¾Ư
  TimeSpiClose();//¹Ø±ƠDS1302
  return address;//·µ»ØÊư¾Ư
}

//¶ÁDS1302RAM×Ö½Ú
unsigned char TimeRamByteRead(unsigned char address)
{
  TimeSpiOpen();//´̣¿ªDS1302
  TimeSpiReadWrite((address << 1) | 0xc1);//Đ´ÈëDS1302ĂüÁî
  address = TimeSpiReadWrite(0xff);//¶ÁÈëDS1302Êư¾Ư
  TimeSpiClose();//¹Ø±ƠDS1302
  return address;//·µ»ØÊư¾Ư
}

//Đ´DS1302×Ö½Ú
void TimeByteWrite(unsigned char address, unsigned char val)
{
  TimeSpiOpen();//´̣¿ªDS1302
  TimeSpiReadWrite(address);//Đ´µØÖ·
  TimeSpiReadWrite(val);//Đ´Êư¾Ư
  TimeSpiClose();//¹Ø±ƠDS1302
}

//Đ´DS1302×Ö½Ú
void TimeRamByteWrite(unsigned char address, unsigned char val)
{
  TimeSpiOpen();//´̣¿ªDS1302
  TimeSpiReadWrite((address << 1) | 0xc0);//Đ´µØÖ·
  TimeSpiReadWrite(val);//Đ´Êư¾Ư
  TimeSpiClose();//¹Ø±ƠDS1302
}

//Ê¹ÄÜDS1302Đ´±£»¤
void TimeWriteEnable(void)
{
  TimeByteWrite(timewriteregall, timewriteseg);//Ê¹ÄÜDS1302Đ´±£»¤
}

//¿ª·ÅDS1302Đ´±£»¤
void TimeWrieDisbale(void)
{
  TimeByteWrite(timewriteregall, 0);//¿ª·ÅDS1302Đ´±£»¤
}

//DS1302¹¤×÷¿ªÊ¼
void TimeWorkStart(void)
{
unsigned char val;
  val = TimeByteRead(timereadseg);//¶ÁĂëÊư¾Ư
  val &= 0x7f;//´̣¿ª¾§Ơñ
  TimeWrieDisbale();//¿ª·ÅDS1302Đ´±£»¤
  TimeByteWrite(timewriteseg, val);//´̣¿ª¾§Ơñ
  TimeByteWrite(tricklewrite, 0xa5);//´̣¿ª³äµç¶₫¼«¹Ü
  TimeWriteEnable();//Ê¹ÄÜDS1302Đ´±£»¤
}

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