DS1302实时时钟
介绍
引脚定义和应用电路
内部结构框图
寄存器定义
时序定义
BCD码
LCD1602显示年月日时分秒星期信息
DS1302.c
#include <REGX52.H>
#include "DS1302.h"
sbit DS1302_SCLK=P3^6;
sbit DS1302_IO=P3^4;
sbit DS1302_CE=P3^5;
#define DS1302_SECOND 0x80 //秒
#define DS1302_MINUTE 0x82 //分
#define DS1302_HOUR 0x84 //时
#define DS1302_DATE 0x86 //日
#define DS1302_MONTH 0x88 //月
#define DS1302_DAY 0x8A //星期
#define DS1302_YEAR 0x8C //年
#define DS1302_WP 0x8E //写保护
unsigned char DS1302_Time[]={23,11,13,15,14,56,1}; //年月日时分秒星期
void DS1302_Init()
{
DS1302_CE=0;
DS1302_SCLK=0;
DS1302_WriteByte(DS1302_WP,0x00); //关闭写保护
}
void DS1302_WriteByte(unsigned char Command,Data)
{
unsigned char i;
DS1302_CE=1;
for(i=0;i<8;i++)
{
DS1302_IO=Command&(0x01<<i);
DS1302_SCLK=1;
DS1302_SCLK=0;
}
for(i=0;i<8;i++)
{
DS1302_IO=Data&(0x01<<i);
DS1302_SCLK=1;
DS1302_SCLK=0;
}
DS1302_CE=0;
}
unsigned char DS1302_ReadByte(unsigned char Command)
{
unsigned char i,Data=0x00;
DS1302_CE=1;
Command++;
for(i=0;i<8;i++)
{
DS1302_IO=Command&(0x01<<i);
DS1302_SCLK=0;
DS1302_SCLK=1;
}
for(i=0;i<8;i++)
{
DS1302_SCLK=1;
DS1302_SCLK=0;
if(DS1302_IO){Data|=(0x01<<i);}
}
DS1302_CE=0;
DS1302_IO=0;
return Data;
}
void DS1302_SetTime()
{
DS1302_WriteByte(DS1302_WP,0x00); //关闭写保护
DS1302_WriteByte(DS1302_YEAR,DS1302_Time[0]/10*16+DS1302_Time[0]%10);
DS1302_WriteByte(DS1302_MONTH,DS1302_Time[1]/10*16+DS1302_Time[1]%10);
DS1302_WriteByte(DS1302_DATE,DS1302_Time[2]/10*16+DS1302_Time[2]%10);
DS1302_WriteByte(DS1302_HOUR,DS1302_Time[3]/10*16+DS1302_Time[3]%10);
DS1302_WriteByte(DS1302_MINUTE,DS1302_Time[4]/10*16+DS1302_Time[4]%10);
DS1302_WriteByte(DS1302_SECOND,DS1302_Time[5]/10*16+DS1302_Time[5]%10);
DS1302_WriteByte(DS1302_DAY,DS1302_Time[6]/10*16+DS1302_Time[6]%10);
DS1302_WriteByte(DS1302_WP,0x80); //打开写保护
}
void DS1302_GetTime()
{
unsigned char Temp;
Temp=DS1302_ReadByte(DS1302_YEAR);
DS1302_Time[0]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_MONTH);
DS1302_Time[1]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_DATE);
DS1302_Time[2]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_HOUR);
DS1302_Time[3]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_MINUTE);
DS1302_Time[4]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_SECOND);
DS1302_Time[5]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_DAY);
DS1302_Time[6]=Temp/16*10+Temp%16;
}
DS1302.h
#ifndef __DS1302_H__
#define __DS1302_H__
extern unsigned char DS1302_Time[];
void DS1302_Init();
void DS1302_WriteByte(unsigned char Command,Data);
unsigned char DS1302_ReadByte(unsigned char Command);
void DS1302_SetTime();
void DS1302_GetTime();
#endif
main.c
#include <REGX52.H>
#include "LCD1602.h"
#include "DS1302.h"
#include "Delay.h"
void main()
{
LCD_Init();
LCD_ShowString(1,1," - - DAY:");
LCD_ShowString(2,1," : : ");
DS1302_Init();
DS1302_SetTime();
while(1)
{
DS1302_GetTime();
LCD_ShowNum(1,1,DS1302_Time[0],2);
LCD_ShowNum(1,4,DS1302_Time[1],2);
LCD_ShowNum(1,7,DS1302_Time[2],2);
LCD_ShowNum(2,1,DS1302_Time[3],2);
LCD_ShowNum(2,4,DS1302_Time[4],2);
LCD_ShowNum(2,7,DS1302_Time[5],2);
LCD_ShowNum(1,15,DS1302_Time[6],1);
Delay(20);
}
}
运行效果
LCD1602显示年月日时分秒星期并可修改
DS1302.c
#include <REGX52.H>
#include "DS1302.h"
sbit DS1302_SCLK=P3^6;
sbit DS1302_IO=P3^4;
sbit DS1302_CE=P3^5;
#define DS1302_SECOND 0x80 //秒
#define DS1302_MINUTE 0x82 //分
#define DS1302_HOUR 0x84 //时
#define DS1302_DATE 0x86 //日
#define DS1302_MONTH 0x88 //月
#define DS1302_DAY 0x8A //星期
#define DS1302_YEAR 0x8C //年
#define DS1302_WP 0x8E //写保护
char DS1302_Time[]={23,11,13,15,14,56,1}; //年月日时分秒星期
void DS1302_Init()
{
DS1302_CE=0;
DS1302_SCLK=0;
DS1302_WriteByte(DS1302_WP,0x00); //关闭写保护
}
void DS1302_WriteByte(unsigned char Command,Data)
{
unsigned char i;
DS1302_CE=1;
for(i=0;i<8;i++)
{
DS1302_IO=Command&(0x01<<i);
DS1302_SCLK=1;
DS1302_SCLK=0;
}
for(i=0;i<8;i++)
{
DS1302_IO=Data&(0x01<<i);
DS1302_SCLK=1;
DS1302_SCLK=0;
}
DS1302_CE=0;
}
unsigned char DS1302_ReadByte(unsigned char Command)
{
unsigned char i,Data=0x00;
DS1302_CE=1;
Command++;
for(i=0;i<8;i++)
{
DS1302_IO=Command&(0x01<<i);
DS1302_SCLK=0;
DS1302_SCLK=1;
}
for(i=0;i<8;i++)
{
DS1302_SCLK=1;
DS1302_SCLK=0;
if(DS1302_IO){Data|=(0x01<<i);}
}
DS1302_CE=0;
DS1302_IO=0;
return Data;
}
void DS1302_SetTime()
{
DS1302_WriteByte(DS1302_WP,0x00); //关闭写保护
DS1302_WriteByte(DS1302_YEAR,DS1302_Time[0]/10*16+DS1302_Time[0]%10);
DS1302_WriteByte(DS1302_MONTH,DS1302_Time[1]/10*16+DS1302_Time[1]%10);
DS1302_WriteByte(DS1302_DATE,DS1302_Time[2]/10*16+DS1302_Time[2]%10);
DS1302_WriteByte(DS1302_HOUR,DS1302_Time[3]/10*16+DS1302_Time[3]%10);
DS1302_WriteByte(DS1302_MINUTE,DS1302_Time[4]/10*16+DS1302_Time[4]%10);
DS1302_WriteByte(DS1302_SECOND,DS1302_Time[5]/10*16+DS1302_Time[5]%10);
DS1302_WriteByte(DS1302_DAY,DS1302_Time[6]/10*16+DS1302_Time[6]%10);
DS1302_WriteByte(DS1302_WP,0x80); //打开写保护
}
void DS1302_GetTime()
{
unsigned char Temp;
Temp=DS1302_ReadByte(DS1302_YEAR);
DS1302_Time[0]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_MONTH);
DS1302_Time[1]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_DATE);
DS1302_Time[2]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_HOUR);
DS1302_Time[3]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_MINUTE);
DS1302_Time[4]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_SECOND);
DS1302_Time[5]=Temp/16*10+Temp%16;
Temp=DS1302_ReadByte(DS1302_DAY);
DS1302_Time[6]=Temp/16*10+Temp%16;
}
DS1302.h
#ifndef __DS1302_H__
#define __DS1302_H__
extern char DS1302_Time[];
void DS1302_Init(); //年月日时分秒星期
void DS1302_WriteByte(unsigned char Command,Data);
unsigned char DS1302_ReadByte(unsigned char Command);
void DS1302_SetTime();
void DS1302_GetTime();
#endif
Timer0..c
#include <REGX52.H>
/**
* @brief 定时器0初始化,1毫秒@12.000MHz
* @param 无
* @retval 无
*/
void Timer0_Init(void)
{
TMOD &= 0xF0; //设置定时器模式
TMOD |= 0x01; //设置定时器模式
TL0 = 0x18; //设置定时初始值
TH0 = 0xFC; //设置定时初始值
TF0 = 0; //清除TF0标志
TR0 = 1; //定时器0开始计时
ET0=1;
EA=1;
PT0=0;
}
/* 定时器中断函数模板
void Timer0_Routine() interrupt 1
{
static unsigned int T0Count;
TL0 = 0x18;
TH0 = 0xFC;
T0Count++;
if(T0Count>=1000)
{
T0Count=0;
}
}
*/
Timer0.h
#ifndef __TIMER0_H__
#define __TIMER0_H__
void Timer0_Init(void);
#endif
Key.c
#include <REGX52.H>
#include "Delay.h"
/**
* @brief 获取独立按键键码
* @param 无
* @retval 按下按键的键码,范围:1~4, 无按键按下返回0
*/
unsigned char Key()
{
unsigned char KeyNumber=0;
if(P3_1==0){Delay(20);while(P3_1==0);Delay(20);KeyNumber=1;}
if(P3_0==0){Delay(20);while(P3_0==0);Delay(20);KeyNumber=2;}
if(P3_2==0){Delay(20);while(P3_2==0);Delay(20);KeyNumber=3;}
if(P3_3==0){Delay(20);while(P3_3==0);Delay(20);KeyNumber=4;}
return KeyNumber;
}
Key.h
#ifndef __KEY_H__
#define __KEY_H__
unsigned char Key();
#endif
LCD1602.c
#include <REGX52.H>
//引脚配置：
sbit LCD_RS=P2^6;
sbit LCD_RW=P2^5;
sbit LCD_EN=P2^7;
#define LCD_DataPort P0
//函数定义：
/**
* @brief LCD1602延时函数，12MHz调用可延时1ms
* @param 无
* @retval 无
*/
void LCD_Delay()
{
unsigned char i, j;
i = 2;
j = 239;
do
{
while (--j);
} while (--i);
}
/**
* @brief LCD1602写命令
* @param Command 要写入的命令
* @retval 无
*/
void LCD_WriteCommand(unsigned char Command)
{
LCD_RS=0;
LCD_RW=0;
LCD_DataPort=Command;
LCD_EN=1;
LCD_Delay();
LCD_EN=0;
LCD_Delay();
}
/**
* @brief LCD1602写数据
* @param Data 要写入的数据
* @retval 无
*/
void LCD_WriteData(unsigned char Data)
{
LCD_RS=1;
LCD_RW=0;
LCD_DataPort=Data;
LCD_EN=1;
LCD_Delay();
LCD_EN=0;
LCD_Delay();
}
/**
* @brief LCD1602设置光标位置
* @param Line 行位置，范围：1~2
* @param Column 列位置，范围：1~16
* @retval 无
*/
void LCD_SetCursor(unsigned char Line,unsigned char Column)
{
if(Line==1)
{
LCD_WriteCommand(0x80|(Column-1));
}
else if(Line==2)
{
LCD_WriteCommand(0x80|(Column-1+0x40));
}
}
/**
* @brief LCD1602初始化函数
* @param 无
* @retval 无
*/
void LCD_Init()
{
LCD_WriteCommand(0x38);//八位数据接口，两行显示，5*7点阵
LCD_WriteCommand(0x0c);//显示开，光标关，闪烁关
LCD_WriteCommand(0x06);//数据读写操作后，光标自动加一，画面不动
LCD_WriteCommand(0x01);//光标复位，清屏
}
/**
* @brief 在LCD1602指定位置上显示一个字符
* @param Line 行位置，范围：1~2
* @param Column 列位置，范围：1~16
* @param Char 要显示的字符
* @retval 无
*/
void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char)
{
LCD_SetCursor(Line,Column);
LCD_WriteData(Char);
}
/**
* @brief 在LCD1602指定位置开始显示所给字符串
* @param Line 起始行位置，范围：1~2
* @param Column 起始列位置，范围：1~16
* @param String 要显示的字符串
* @retval 无
*/
void LCD_ShowString(unsigned char Line,unsigned char Column,char *String)
{
unsigned char i;
LCD_SetCursor(Line,Column);
for(i=0;String[i]!='\0';i++)
{
LCD_WriteData(String[i]);
}
}
/**
* @brief 返回值=X的Y次方
*/
int LCD_Pow(int X,int Y)
{
unsigned char i;
int Result=1;
for(i=0;i<Y;i++)
{
Result*=X;
}
return Result;
}
/**
* @brief 在LCD1602指定位置开始显示所给数字
* @param Line 起始行位置，范围：1~2
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：0~65535
* @param Length 要显示数字的长度，范围：1~5
* @retval 无
*/
void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
unsigned char i;
LCD_SetCursor(Line,Column);
for(i=Length;i>0;i--)
{
LCD_WriteData(Number/LCD_Pow(10,i-1)%10+'0');
}
}
/**
* @brief 在LCD1602指定位置开始以有符号十进制显示所给数字
* @param Line 起始行位置，范围：1~2
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：-32768~32767
* @param Length 要显示数字的长度，范围：1~5
* @retval 无
*/
void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length)
{
unsigned char i;
unsigned int Number1;
LCD_SetCursor(Line,Column);
if(Number>=0)
{
LCD_WriteData('+');
Number1=Number;
}
else
{
LCD_WriteData('-');
Number1=-Number;
}
for(i=Length;i>0;i--)
{
LCD_WriteData(Number1/LCD_Pow(10,i-1)%10+'0');
}
}
/**
* @brief 在LCD1602指定位置开始以十六进制显示所给数字
* @param Line 起始行位置，范围：1~2
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：0~0xFFFF
* @param Length 要显示数字的长度，范围：1~4
* @retval 无
*/
void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
unsigned char i,SingleNumber;
LCD_SetCursor(Line,Column);
for(i=Length;i>0;i--)
{
SingleNumber=Number/LCD_Pow(16,i-1)%16;
if(SingleNumber<10)
{
LCD_WriteData(SingleNumber+'0');
}
else
{
LCD_WriteData(SingleNumber-10+'A');
}
}
}
/**
* @brief 在LCD1602指定位置开始以二进制显示所给数字
* @param Line 起始行位置，范围：1~2
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：0~1111 1111 1111 1111
* @param Length 要显示数字的长度，范围：1~16
* @retval 无
*/
void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
unsigned char i;
LCD_SetCursor(Line,Column);
for(i=Length;i>0;i--)
{
LCD_WriteData(Number/LCD_Pow(2,i-1)%2+'0');
}
}
LCD1602.h
#ifndef __LCD1602_H__
#define __LCD1602_H__
//用户调用函数：
void LCD_Init();
void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char);
void LCD_ShowString(unsigned char Line,unsigned char Column,char *String);
void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);
void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length);
void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);
void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);
#endif
main.c
#include <REGX52.H>
#include "LCD1602.h"
#include "DS1302.h"
#include "Delay.h"
#include "Key.h"
#include "Timer0.h"
unsigned char KeyNum,MODE,TimeSetSelect,TimeSetFlashFlag;
void TimeShow()
{
DS1302_GetTime();
LCD_ShowNum(1,1,DS1302_Time[0],2);
LCD_ShowNum(1,4,DS1302_Time[1],2);
LCD_ShowNum(1,7,DS1302_Time[2],2);
LCD_ShowNum(2,1,DS1302_Time[3],2);
LCD_ShowNum(2,4,DS1302_Time[4],2);
LCD_ShowNum(2,7,DS1302_Time[5],2);
LCD_ShowNum(2,15,DS1302_Time[6],1);
}
void TimeSet()
{
LCD_ShowNum(1,15,TimeSetSelect+1,1);
if(KeyNum==2)
{
TimeSetSelect++;
if(TimeSetSelect>6)TimeSetSelect=0;
}
if(KeyNum==3)
{
DS1302_Time[TimeSetSelect]++;
if(DS1302_Time[0]>99){DS1302_Time[0]=0;}
if(DS1302_Time[1]>12){DS1302_Time[1]=1;}
switch(DS1302_Time[1])
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:if(DS1302_Time[2]>31){DS1302_Time[2]=1;}break;
case 2:if(DS1302_Time[0]%400==0||DS1302_Time[0]%4==0&&DS1302_Time[0]%100!=0)
{
if(DS1302_Time[2]>29){DS1302_Time[2]=0;}
}
else
{
if(DS1302_Time[2]>28){DS1302_Time[2]=0;}
}
break;
case 4:
case 6:
case 9:
case 11:if(DS1302_Time[2]>30){DS1302_Time[2]=0;}break;
}
if(DS1302_Time[3]>23){DS1302_Time[3]=0;}
if(DS1302_Time[4]>59){DS1302_Time[4]=0;}
if(DS1302_Time[5]>59){DS1302_Time[5]=0;}
if(DS1302_Time[6]>7){DS1302_Time[6]=1;}
}
if(KeyNum==4)
{
DS1302_Time[TimeSetSelect]--;
if(DS1302_Time[0]<1){DS1302_Time[0]=99;}
if(DS1302_Time[1]<1){DS1302_Time[1]=12;}
switch(DS1302_Time[1])
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:if(DS1302_Time[2]<1){DS1302_Time[2]=31;}break;
case 2:if(DS1302_Time[0]%400==0||DS1302_Time[0]%4==0&&DS1302_Time[0]%100!=0)
{
if(DS1302_Time[2]<1){DS1302_Time[2]=29;}
}
else
{
if(DS1302_Time[2]<1){DS1302_Time[2]=28;}
}
break;
case 4:
case 6:
case 9:
case 11:if(DS1302_Time[2]<1){DS1302_Time[2]=30;}break;
}
if(DS1302_Time[3]<1){DS1302_Time[3]=23;}
if(DS1302_Time[4]<1){DS1302_Time[4]=59;}
if(DS1302_Time[5]<1){DS1302_Time[5]=59;}
if(DS1302_Time[6]<1){DS1302_Time[6]=7;}
}
DS1302_SetTime();
if(TimeSetFlashFlag)
{
switch(TimeSetSelect)
{
case 0:LCD_ShowString(1,1," ");break;
case 1:LCD_ShowString(1,4," ");break;
case 2:LCD_ShowString(1,7," ");break;
case 3:LCD_ShowString(2,1," ");break;
case 4:LCD_ShowString(2,4," ");break;
case 5:LCD_ShowString(2,7," ");break;
case 6:LCD_ShowString(2,15," ");break;
}
}
else
{
TimeShow();
}
}
void main()
{
LCD_Init();
Timer0_Init();
LCD_ShowString(1,1," - -");
LCD_ShowString(2,1," : : DAY:");
DS1302_Init();
DS1302_SetTime();
while(1)
{
KeyNum=Key();
if(KeyNum==1)
{
MODE=(MODE?0:1);
}
switch(MODE)
{
case 0:LCD_ShowString(1,11," ");TimeShow();break;
case 1:LCD_ShowString(1,11,"SEL:");TimeSet();break;
}
}
}
void Timer0_Routine() interrupt 1
{
static unsigned int T0Count;
TL0 = 0x18;
TH0 = 0xFC;
T0Count++;
if(T0Count>=500)
{
T0Count=0;
TimeSetFlashFlag=!TimeSetFlashFlag;
}
}
运行效果
 (2).gif)