日历时钟ds12887_146818的c51源程序.c

日历时钟DS12887的标准源代码

//日历时钟DS12887/146818的C51源程序
#define uchar unsigned char
#define uint unsigned int
#include <reg52.h>
#include <stdio.h>
#include <absacc.h>
#include <math.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>

#define P128870 XBYTE[0xa000]
#define P128871 XBYTE[0xa001]
#define P128872 XBYTE[0xa002]
#define P128873 XBYTE[0xa003]
#define P128874 XBYTE[0xa004]
#define P128875 XBYTE[0xa005]
#define P128876 XBYTE[0xa006]
#define P128877 XBYTE[0xa007]
#define P128878 XBYTE[0xa008]
#define P128879 XBYTE[0xa009]
#define P12887a XBYTE[0xa00a]
#define P12887b XBYTE[0xa00b]
#define P12887c XBYTE[0xa00c]
#define P12887d XBYTE[0xa00d]
#define P12887e XBYTE[0xa00e]
#define P12887f XBYTE[0xa00f]

void setup12887(uchar *p);
void read12887(uchar *p);
void start12887(void);

void setup12887(uchar *p)  //设置系统时间
{
    uchar i;
    i=P12887d;
    P12887a=0x70;    P12887b=0xa2;    P128870=*p++;    P128871=0xff;    P128872=*p++;
    P128873=0xff;    P128874=*p++;    P128875=0xff;    P128876=*p++;    P128877=*p++;
    P128878=*p++;    P128879=*p++;    P12887b=0x22;    P12887a=0x20;
    i=P12887c;
}
void read12887(uchar *p)   //读取系统时间
{
    uchar a;
    do{ a=P12887a; } while((a&0x80)==0x80);
    *p++=P128870; *p++=P128872; *p++=P128874; *p++=P128876;
    *p++=P128877; *p++=P128878; *p++=P128879;
}
void start12887(void)      //启动时钟
{
    uchar i;
    i=P12887d;
    P12887a=0x70;    P12887b=0xa2;    P128871=0xff;    P128873=0xff;    P128875=0xff;
    P12887b=0x22;    P12887a=0x20;
    i=P12887c;
}


//24C02串行EEPROM的C语言源程序
#define uchar unsigned char
#define uint unsigned int
#include <reg52.h>
#include <stdio.h>
#include <absacc.h>
sbit scl=P3^5;  //24c02 SCL
sbit sda=P3^4;  //24c02 SDA
sbit DOG=P1^7;  //狗
uchar x24c02_read(uchar address);  //从24c02的地址address中读取一个字节数据
void x24c02_write(uchar address,uchar info);  //向24c02的address地址中写入一字节数据info
void x24c02_init();   //24c02初始化子程序
void delay1(uchar x);
void flash();
void x24c01_init();
void start();
void stop();
void writex(uchar j);
uchar readx();
void clock();
void delay1(uchar x)
{
   uint i;
   for(i=0;i<x;i++);
   DOG=~DOG;
}
void flash()
{
   uchar u;
   DOG=~DOG;
}
void x24c02_init()
{
   scl=1; flash(); sda=1; flash();
}
void start()
{
   sda=1; flash(); scl=1; flash(); sda=0; flash(); scl=0; flash();
}
void stop()
{
   sda=0; flash(); scl=1; flash(); sda=1; flash();
}
void writex(uchar j)
{
   uchar i,temp;
   temp=j;
   for (i=0;i<8;i++){
      temp=temp<<1; scl=0; flash(); sda=CY; flash(); scl=1; flash();
   }
   scl=0; flash(); sda=1; flash();
}
uchar readx()
{
   uchar i,j,k=0;
   scl=0; flash(); sda=1;
   for (i=0;i<8;i++){
      flash(); scl=1; flash();
      if (sda==1) j=1;
      else j=0;
      k=(k<<1)|j; scl=0;
   }
   flash(); return(k);
}
void clock()
{
   uchar i=0;
   scl=1; flash();
   while ((sda==1)&&(i<255))i++;
   scl=0; flash();
}
uchar x24c02_read(uchar address)
{
   uchar i;
   start(); writex(0xa0);
   clock(); writex(address);
   clock(); start();
   writex(0xa1); clock();
   i=readx(); stop();
   delay1(10);
   return(i);
}
void x24c02_write(uchar address,uchar info)
{
   EA=0;
   start(); writex(0xa0);
   clock(); writex(address);
   clock(); writex(info);
   clock(); stop();
   EA=1;
   delay1(50);
}