rt.c

是美信公司realtime芯片ds12887操作的详细原代码

#include<reg52.h>
#include<absacc.h>
#define uchar unsigned char
uchar xdata *tcom=0x0000;
uchar t[3]={0,0,0};
uchar dat[4]={0,0,0,0};
void delay(uchar x)
{
uchar i;
while(x--)
for(i=0;i<50;i++);
}
void int_rt()
{  //一般不使用，改变工作方式才用
*(tcom+0x0a)=0x2f; //开启时钟，SQW－5HZ
*(tcom+0x0b)=0xbf;  //reset,选24时，
*(tcom+0x0b)=0x2f; //时钟开始正常工作
}
void set_t(uchar hour,uchar minute)
{
*(tcom+0x02)=minute;
*(tcom+0x04)=hour;
}
void set_d(uchar week,uchar date,uchar month,uchar year)
{
   *(tcom+0x06)=week;
   *(tcom+0x07)=date;
   *(tcom+0x08)=month;
   *(tcom+0x09)=year;
 }
 
 void read_d()
 {
 dat[0]=*(tcom+0x06);
 dat[1]=*(tcom+0x07);
 dat[2]=*(tcom+0x08);
 dat[3]=*(tcom+0x09);
 }
void read_t()
{
t[0]=*(tcom+0x00);   //second
t[1]=*(tcom+0x02);   //minute
t[2]=*(tcom+0x04);   //hour
}
main()
{
uchar x;
while(1)  
{
read_t();

delay(1000);
}

}