单片机+DS1302时钟芯片程序读数据一直是29 -

#include <REGX51.H>
#include "LCD1602.H"
#include "DS1302.H"
unsigned int Second,Minutes,Hour,Day,Month,Year,Week;
unsigned char Weeks[7][3]={"Mon","Tue","Thu","Wed","Fri","Sat","Sun"};
void main()
{
LCD_Init();
LCD_ShowNum(1,1,20,2);//LCD1602显示数字，分别是，第一行，第一列，数字位数。
LCD_ShowString(1,5,"- -");//显示字符串
LCD_ShowString(2,3,": :");
DS1302_Init();//初始化1302
Set_Time();//设置给定的时间
while(1)
{
Read_Time();//读取时间
LCD_ShowNum(1,3,Real_Time[0],2);
LCD_ShowNum(1,6,Real_Time[1],2);
LCD_ShowNum(1,9,Real_Time[2],2);
LCD_ShowNum(2,1,Real_Time[3],2);
LCD_ShowNum(2,4,Real_Time[4],2);
LCD_ShowNum(2,7,Real_Time[5],2);
LCD_ShowString(1,13,"Sat");
}
}
//一-------------------
#include <REGX51.H>
//写指令
#define DS1302_Second 0x80
#define DS1302_Minute 0x82
#define DS1302_Hour 0x84
#define DS1302_Day 0x86
#define DS1302_Month 0x88
#define DS1302_Year 0x8A
#define DS1302_Week 0x8C
#define DS1302_WP 0x8E
//读指令
#define DS1302R_Second 0x81
#define DS1302R_Minute 0x83
#define DS1302R_Hour 0x85
#define DS1302R_Day 0x87
#define DS1302R_Month 0x89
#define DS1302R_Year 0x8B
#define DS1302R_Week 0x8D
sbit DS1302_SCLK=P3^6;
sbit DS1302_CE=P3^5;
sbit DS1302_IO=P3^4;
unsigned char Time[7]={21,11,28,20,50,30,7};//设定的时间,依次为年/月/日/时/分/秒/周
unsigned char Real_Time[7];
void DS1302_Init() //初始化
{
DS1302_CE=0;
DS1302_SCLK=0;
}
DS1302_WriteByte(unsigned char cmd,datax)//DS1302写命令
{
unsigned int i;
DS1302_CE=1;
for(i=0;i<8;i++)
{
DS1302_IO=cmd&(0x01<<i);
DS1302_SCLK=1;
DS1302_SCLK=0;
}
for(i=0;i<8;i++)
{
DS1302_IO=datax & (0x01<<i);
DS1302_SCLK=1;
DS1302_SCLK=0;
}
DS1302_CE=0;
}
unsigned char DS1302_ReadByte(unsigned char cmd)//DS1302读命令
{
unsigned char data1=0x00;
unsigned int i;
DS1302_CE=1;
for(i=0;i<8;i++)
{
DS1302_IO=cmd&(0x01<<i);
DS1302_SCLK=0;
DS1302_SCLK=1;
}
for(i=0;i<8;i++)
{
if(DS1302_IO==1){data1=DS1302_IO|(0x01<<i);}
DS1302_SCLK=1;
DS1302_SCLK=0;
}
DS1302_CE=0;
DS1302_IO=0;
return data1;
}
void Set_Time()
{
DS1302_WriteByte(DS1302_WP,0x00);//关闭写保护
DS1302_WriteByte(DS1302_Year,21);//设置年
DS1302_WriteByte(DS1302_Month,Time[1]);//设置年
DS1302_WriteByte(DS1302_Day,Time[2]);//设置年
DS1302_WriteByte(DS1302_Hour,Time[3]);//设置年
DS1302_WriteByte(DS1302_Minute,Time[4]);//设置年
DS1302_WriteByte(DS1302_Second,Time[5]);//设置年
DS1302_WriteByte(DS1302_Week,Time[6]);//设置年
}
void Read_Time()
{
unsigned int i;
Real_Time[0]=DS1302_ReadByte(DS1302R_Year);
Real_Time[1]=DS1302_ReadByte(DS1302R_Month);
Real_Time[2]=DS1302_ReadByte(DS1302R_Day);
Real_Time[3]=DS1302_ReadByte(DS1302R_Hour);
Real_Time[4]=DS1302_ReadByte(DS1302R_Minute);
Real_Time[5]=DS1302_ReadByte(DS1302R_Second);
Real_Time[6]=DS1302_ReadByte(DS1302R_Week);
for(i=0;i<7;i++)
{
Time[i]=Time[i]/16*10+Time[i]%16;
}
}

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