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| 实时时钟DS1302读写程序(C51) |
//´̣¿ªDS1302
void TimeSpiOpen(void)
{
TIMECLK = 0;
TIMERST = 0;//½ûÖ¹DS1302
TIMEIO = 1;//ÊÍ·ÅÊư¾Ư×ÜÏß
TIMERST = 1;//ʹÄÜDS1302
}
//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¡8λÊư¾Ư
for (i = 8;i > 0; i--)
{
TIMECLK = 0;//ʱÖÓϽµÑØÊäÈëÊư¾Ư(DS1302¶Á)
_nop_();//ÑÓʱ
CY = TIMEIO;//½ÓÊƠ´®ĐĐÊư¾Ưµ½CY
_rrca_();//Ó̉̉Æ̉»Î»Êư¾Ưµ½CY(ÏÈ´æºóÈ¡)
TIMEIO = CY;//·¢ËÍ´®ĐĐÊư¾Ư
TIMECLK = 1;//ʱÖÓÉÏÉưÑØ´̣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
}
//ʹÄÜDS1302Đ´±£»¤
void TimeWriteEnable(void)
{
TimeByteWrite(timewriteregall, timewriteseg);//ʹÄÜDS1302Đ´±£»¤
}
//¿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();//ʹÄÜDS1302Đ´±£»¤
}