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/*
程序說明: DS1302驅(qū)動(dòng)程序
軟件環(huán)境: Keil uVision 4.10
硬件環(huán)境: CT107單片機(jī)綜合實(shí)訓(xùn)平臺(tái) 8051，12MHz
日 期: 2011-8-9
*/
#include <reg52.h>
#include <intrins.h>
sbit SCK=P1^7;
sbit SDA=P2^3;
sbit RST = P1^3; // DS1302復(fù)位
void Write_Ds1302_Byte(unsigned char temp)
{
unsigned char i;
for (i=0;i<8;i++)
{
SCK=0;
SDA=temp&0x01;
temp>>=1;
SCK=1;
}
}
void Write_Ds1302( unsigned char address,unsigned char dat )
{
RST=0;
_nop_();
SCK=0;
_nop_();
RST=1;
_nop_();
Write_Ds1302_Byte(address);
Write_Ds1302_Byte(dat);
RST=0;
}
unsigned char Read_Ds1302 ( unsigned char address )
{
unsigned char i,temp=0x00;
RST=0;
_nop_();
SCK=0;
_nop_();
RST=1;
_nop_();
Write_Ds1302_Byte(address);
for (i=0;i<8;i++)
{
SCK=0;
temp>>=1;
if(SDA)
temp|=0x80;
SCK=1;
}
RST=0;
_nop_();
RST=0;
SCK=0;
_nop_();
SCK=1;
_nop_();
SDA=0;
_nop_();
SDA=1;
_nop_();
return (temp);
}
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