求教DS1302问题，读写寄存器使用同一个地址竟然能成功！

只看该作者 · 2012-11-18 11:57

void Ds1302_Write_Time(void)
{

unsigned char i,tmp;
for(i=0;i<8;i++)
   {                //BCD处理
  tmp=time_buf1[i]/10;
  time_buf[i]=time_buf1[i]%10;
  time_buf[i]=time_buf[i]+tmp*16;
   }
Ds1302_Write_Byte(ds1302_control_add,0x00); //关闭写保护
Ds1302_Write_Byte(ds1302_sec_add,0x80); //暂停
//Ds1302_Write_Byte(ds1302_charger_add,0xa9); //涓流充电
Ds1302_Write_Byte(ds1302_year_add,time_buf[1]);  //年
Ds1302_Write_Byte(ds1302_month_add,time_buf[2]); //月
Ds1302_Write_Byte(ds1302_date_add,time_buf[3]);  //日
Ds1302_Write_Byte(ds1302_day_add,time_buf[7]);  //周
Ds1302_Write_Byte(ds1302_hr_add,time_buf[4]);  //时
Ds1302_Write_Byte(ds1302_min_add,time_buf[5]);  //分
Ds1302_Write_Byte(ds1302_sec_add,time_buf[6]);  //秒
Ds1302_Write_Byte(ds1302_day_add,time_buf[7]);  //周
Ds1302_Write_Byte(ds1302_control_add,0x80); //打开写保护
}
/*------------------------------------------------
         从DS1302读出时钟数据
------------------------------------------------*/
void Ds1302_Read_Time(void)
{
      unsigned char i,tmp;
time_buf[1]=Ds1302_Read_Byte(ds1302_year_add);  //年
time_buf[2]=Ds1302_Read_Byte(ds1302_month_add);  //月
time_buf[3]=Ds1302_Read_Byte(ds1302_date_add);  //日
time_buf[4]=Ds1302_Read_Byte(ds1302_hr_add);  //时
time_buf[5]=Ds1302_Read_Byte(ds1302_min_add);  //分
time_buf[6]=(Ds1302_Read_Byte(ds1302_sec_add))&0x7F;//秒
time_buf[7]=Ds1302_Read_Byte(ds1302_day_add);  //周

for(i=0;i<8;i++)
{          //BCD处理
  tmp=time_buf[i]/16;
  time_buf1[i]=time_buf[i]%16;
  time_buf1[i]=time_buf1[i]+tmp*10;
}
}

只看该作者 · 2012-11-18 11:59

#ifndef __DS1302_H__
#define __DS1302_H__

#include <reg52.h>
#include<intrins.h>

sbit SCK=P1^4;
sbit SDA=P1^5;
sbit RST=P1^6;
//复位脚
#define RST_CLR RST=0//电平置低
#define RST_SET RST=1//电平置高

//双向数据
#define IO_CLR SDA=0//电平置低
#define IO_SET SDA=1//电平置高
#define IO_R SDA  //电平读取

//时钟信号
#define SCK_CLR SCK=0//时钟信号
#define SCK_SET SCK=1//电平置高

#define ds1302_sec_add 0x80 //秒数据地址
#define ds1302_min_add 0x82 //分数据地址
#define ds1302_hr_add 0x84 //时数据地址
#define ds1302_date_add 0x86 //日数据地址
#define ds1302_month_add 0x88 //月数据地址
#define ds1302_day_add 0x8a //星期数据地址
#define ds1302_year_add 0x8c //年数据地址
#define ds1302_control_add 0x8e //控制数据地址
#define ds1302_charger_add 0x90
#define ds1302_clkburst_add 0xbe

extern unsigned char time_buf1[8];//空年月日时分秒周
extern unsigned char time_buf[8] ;//空年月日时分秒周
/*------------------------------------------------
         向DS1302写入一字节数据
------------------------------------------------*/
void Ds1302_Write_Byte(unsigned char addr, unsigned char d);
/*------------------------------------------------
         从DS1302读出一字节数据
------------------------------------------------*/
unsigned char Ds1302_Read_Byte(unsigned char addr) ;
/*------------------------------------------------
         向DS1302写入时钟数据
------------------------------------------------*/
void Ds1302_Write_Time(void) ;
/*------------------------------------------------
         从DS1302读出时钟数据
------------------------------------------------*/
void Ds1302_Read_Time(void)  ;
/*------------------------------------------------
            DS1302初始化
------------------------------------------------*/
void Ds1302_Init(void);

#endif
这是1302头文件

只看该作者 · 2012-11-18 11:59

#include "ds1302.h"

unsigned char time_buf1[8] = {20,10,6,5,12,55,00,6};//空年月日时分秒周
unsigned char time_buf[8] ;                      //空年月日时分秒周
/*------------------------------------------------
         向DS1302写入一字节数据
------------------------------------------------*/
void Ds1302_Write_Byte(unsigned char addr, unsigned char d)
{

unsigned char i;
RST_SET;

//写入目标地址：addr
addr = addr & 0xFE;    //最低位置零
for (i = 0; i < 8; i ++)
      {
if (addr & 0x01)
      {
IO_SET;
}
else
      {
IO_CLR;
}
SCK_SET;
SCK_CLR;
addr = addr >> 1;
}

//写入数据：d
for (i = 0; i < 8; i ++)
   {
if (d & 0x01)
      {
IO_SET;
}
else
      {
IO_CLR;
}
SCK_SET;
SCK_CLR;
d = d >> 1;
}
RST_CLR; //停止DS1302总线
}
/*------------------------------------------------
         从DS1302读出一字节数据
------------------------------------------------*/

unsigned char Ds1302_Read_Byte(unsigned char addr)
{

unsigned char i;
unsigned char temp;
RST_SET;

//写入目标地址：addr
addr = addr | 0x01;//最低位置高
for (i = 0; i < 8; i ++)
      {

if (addr & 0x01)
   {
IO_SET;
}
else
      {
IO_CLR;
}
SCK_SET;
SCK_CLR;
addr = addr >> 1;
}

//输出数据：temp
for (i = 0; i < 8; i ++)
      {
temp = temp >> 1;
if (IO_R)
   {
temp |= 0x80;
}
else
   {
temp &= 0x7F;
}
SCK_SET;
SCK_CLR;
}

RST_CLR; //停止DS1302总线
return temp;
}

/*------------------------------------------------
         向DS1302写入时钟数据
------------------------------------------------*/
void Ds1302_Write_Time(void)
{

unsigned char i,tmp;
for(i=0;i<8;i++)
      {                //BCD处理
tmp=time_buf1[i]/10;
time_buf[i]=time_buf1[i]%10;
time_buf[i]=time_buf[i]+tmp*16;
      }
Ds1302_Write_Byte(ds1302_control_add,0x00); //关闭写保护
Ds1302_Write_Byte(ds1302_sec_add,0x80); //暂停
//Ds1302_Write_Byte(ds1302_charger_add,0xa9); //涓流充电
Ds1302_Write_Byte(ds1302_year_add,time_buf[1]); //年
Ds1302_Write_Byte(ds1302_month_add,time_buf[2]); //月
Ds1302_Write_Byte(ds1302_date_add,time_buf[3]); //日
Ds1302_Write_Byte(ds1302_day_add,time_buf[7]); //周
Ds1302_Write_Byte(ds1302_hr_add,time_buf[4]); //时
Ds1302_Write_Byte(ds1302_min_add,time_buf[5]); //分
Ds1302_Write_Byte(ds1302_sec_add,time_buf[6]); //秒
Ds1302_Write_Byte(ds1302_day_add,time_buf[7]); //周
Ds1302_Write_Byte(ds1302_control_add,0x80); //打开写保护
}

/*------------------------------------------------
         从DS1302读出时钟数据
------------------------------------------------*/
void Ds1302_Read_Time(void)
{
         unsigned char i,tmp;
time_buf[1]=Ds1302_Read_Byte(ds1302_year_add); //年
time_buf[2]=Ds1302_Read_Byte(ds1302_month_add); //月
time_buf[3]=Ds1302_Read_Byte(ds1302_date_add); //日
time_buf[4]=Ds1302_Read_Byte(ds1302_hr_add); //时
time_buf[5]=Ds1302_Read_Byte(ds1302_min_add); //分
time_buf[6]=(Ds1302_Read_Byte(ds1302_sec_add))&0x7F;//秒
time_buf[7]=Ds1302_Read_Byte(ds1302_day_add); //周

for(i=0;i<8;i++)
   {          //BCD处理
tmp=time_buf[i]/16;
time_buf1[i]=time_buf[i]%16;
time_buf1[i]=time_buf1[i]+tmp*10;
   }
}

/*------------------------------------------------
            DS1302初始化
------------------------------------------------*/
void Ds1302_Init(void)
{

RST_CLR; //RST脚置低
SCK_CLR; //SCK脚置低
Ds1302_Write_Byte(ds1302_sec_add,0x00);
}