ds1302.c

1302++18B 20电子钟 程序

#include <REG51.H>
#include <intrins.h>
//#include "LCD1602.h"
//#include "DS1302.h"
#define uint unsigned int
#define uchar unsigned char
sbit  DS1302_CLK = P1^7;              //实时时钟时钟线引脚 
sbit  DS1302_IO  = P1^6;              //实时时钟数据线引脚 
sbit  DS1302_RST = P1^5;              //实时时钟复位线引脚
sbit  wireless_1 = P3^0;
sbit  wireless_2 = P3^1;
sbit  wireless_3 = P3^2;
sbit  wireless_4 = P3^3;
sbit  ACC0 = ACC^0;
sbit  ACC7 = ACC^7;
char hide_sec,hide_min,hide_hour,hide_day,hide_week,hide_month,hide_year;  //秒,分,时到日,月,年位闪的计数
sbit Set = P2^0;       //模式切换键
sbit Up = P2^1;        //加法按钮
sbit Down = P2^2;      //减法按钮
sbit out = P2^3;       //立刻跳出调整模式按钮
sbit DQ = P1^0;        //温度传送数据IO口
char done,count,temp,flag,up_flag,down_flag;
uchar temp_value;      //温度值
uchar TempBuffer[5],week_value[2];


void show_time();   //液晶显示程序
/***********1602液晶显示部分子程序****************/


//Port Definitions**********************************************************
sbit LcdRs		= P2^5;
sbit LcdRw		= P2^6;
sbit LcdEn  	= P2^7;
sfr  DBPort 	= 0x80;		//P0=0x80,P1=0x90,P2=0xA0,P3=0xB0.数据端口

//内部等待函数**************************************************************************
unsigned char LCD_Wait(void)
{
	LcdRs=0;
	LcdRw=1;	_nop_();
	LcdEn=1;	_nop_();
						 
	LcdEn=0;
	return DBPort;		
}
//向LCD写入命令或数据************************************************************
#define LCD_COMMAND			0      // Command
#define LCD_DATA			1      // Data
#define LCD_CLEAR_SCREEN	0x01      // 清屏
#define LCD_HOMING  		0x02      // 光标返回原点
void LCD_Write(bit style, unsigned char input)
{
	LcdEn=0;
	LcdRs=style;
	LcdRw=0;		_nop_();
	DBPort=input;	_nop_();//注意顺序
	LcdEn=1;		_nop_();//注意顺序
	LcdEn=0;		_nop_();
	LCD_Wait();	
}

//设置显示模式************************************************************
#define LCD_SHOW			0x04    //显示开
#define LCD_HIDE			0x00    //显示关	  

#define LCD_CURSOR			0x02 	//显示光标
#define LCD_NO_CURSOR		0x00    //无光标		     

#define LCD_FLASH			0x01    //光标闪动
#define LCD_NO_FLASH		0x00    //光标不闪动

void LCD_SetDisplay(unsigned char DisplayMode)
{
	LCD_Write(LCD_COMMAND, 0x08|DisplayMode);	
}

//设置输入模式************************************************************
#define LCD_AC_UP			0x02
#define LCD_AC_DOWN			0x00      // default

#define LCD_MOVE			0x01      // 画面可平移
#define LCD_NO_MOVE			0x00      //default

void LCD_SetInput(unsigned char InputMode)
{
	LCD_Write(LCD_COMMAND, 0x04|InputMode);
}

//初始化LCD************************************************************
void LCD_Initial()
{
	LcdEn=0;
	LCD_Write(LCD_COMMAND,0x38);           //8位数据端口,2行显示,5*7点阵
	LCD_Write(LCD_COMMAND,0x38);
	LCD_SetDisplay(LCD_SHOW|LCD_NO_CURSOR);    //开启显示, 无光标
	LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN);   //清屏
	LCD_SetInput(LCD_AC_UP|LCD_NO_MOVE);       //AC递增, 画面不动
}

//液晶字符输入的位置************************
void GotoXY(unsigned char x, unsigned char y)
{
	if(y==0)
		LCD_Write(LCD_COMMAND,0x80|x);
	if(y==1)
		LCD_Write(LCD_COMMAND,0x80|(x-0x40));
}

//将字符输出到液晶显示
void Print(unsigned char *str)
{
	while(*str!='\0')
	{
		LCD_Write(LCD_DATA,*str);
		str++;
	}
}






/***********DS1302时钟部分子程序******************/
typedef struct __SYSTEMTIME__
{
	unsigned char Second;
	unsigned char Minute;
	unsigned char Hour;
	unsigned char Week;
	unsigned char Day;
	unsigned char Month;
	unsigned char  Year;
	unsigned char DateString[11];
	unsigned char TimeString[9];
}SYSTEMTIME;	//定义的时间类型
SYSTEMTIME CurrentTime;


#define AM(X)	X
#define PM(X)	(X+12)            	  // 转成24小时制
#define DS1302_SECOND	0x80          //时钟芯片的寄存器位置,存放时间
#define DS1302_MINUTE	0x82
#define DS1302_HOUR		0x84 
#define DS1302_WEEK		0x8A
#define DS1302_DAY		0x86
#define DS1302_MONTH	0x88
#define DS1302_YEAR		0x8C 

void DS1302InputByte(unsigned char d) 	//实时时钟写入一字节(内部函数)
{ 
    unsigned char i;
    ACC = d;
    for(i=8; i>0; i--)
    {
        DS1302_IO = ACC0;           	//相当于汇编中的 RRC
        DS1302_CLK = 1;
        DS1302_CLK = 0;
        ACC = ACC >> 1; 
    } 
}

unsigned char DS1302OutputByte(void) 	//实时时钟读取一字节(内部函数)
{ 
    unsigned char i;
    for(i=8; i>0; i--)
    {
        ACC = ACC >>1;         			//相当于汇编中的 RRC 
        ACC7 = DS1302_IO;
        DS1302_CLK = 1;
        DS1302_CLK = 0;
    } 
    return(ACC); 
}

void Write1302(unsigned char ucAddr, unsigned char ucDa)	//ucAddr: DS1302地址, ucData: 要写的数据
{
    DS1302_RST = 0;
    DS1302_CLK = 0;
    DS1302_RST = 1;
    DS1302InputByte(ucAddr);       	// 地址，命令 
    DS1302InputByte(ucDa);       	// 写1Byte数据
    DS1302_CLK = 1;
    DS1302_RST = 0;
} 

unsigned char Read1302(unsigned char ucAddr)	//读取DS1302某地址的数据
{
    unsigned char ucData;
    DS1302_RST = 0;
    DS1302_CLK = 0;
    DS1302_RST = 1;
    DS1302InputByte(ucAddr|0x01);        // 地址，命令 
    ucData = DS1302OutputByte();         // 读1Byte数据
    DS1302_CLK = 1;
    DS1302_RST = 0;
    return(ucData);
}



void DS1302_GetTime(SYSTEMTIME *Time)  //获取时钟芯片的时钟数据到自定义的结构型数组
{
	unsigned char ReadValue;
	ReadValue = Read1302(DS1302_SECOND);
	Time->Second = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
	ReadValue = Read1302(DS1302_MINUTE);
	Time->Minute = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
	ReadValue = Read1302(DS1302_HOUR);
	Time->Hour = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
	ReadValue = Read1302(DS1302_DAY);
	Time->Day = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);	
	ReadValue = Read1302(DS1302_WEEK);
	Time->Week = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
	ReadValue = Read1302(DS1302_MONTH);
	Time->Month = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);
	ReadValue = Read1302(DS1302_YEAR);
	Time->Year = ((ReadValue&0x70)>>4)*10 + (ReadValue&0x0F);	
}

void DateToStr(SYSTEMTIME *Time)    //将时间年,月,日,星期数据转换成液晶显示字符串,放到数组里DateString[]
{   if(hide_year<2)                 //这里的if,else语句都是判断位闪烁,<2显示数据,>2就不显示,输出字符串为 2007/07/22
    {                               
	  Time->DateString[0] = '2';
	  Time->DateString[1] = '0';	 
	  Time->DateString[2] = Time->Year/10 + '0';
	  Time->DateString[3] = Time->Year%10 + '0';
	}
	  else
	    { 
	      Time->DateString[0] = ' ';
	      Time->DateString[1] = ' ';		 
	      Time->DateString[2] = ' ';
	      Time->DateString[3] = ' ';
		}
	Time->DateString[4] = '/';
	if(hide_month<2)
	{
	  Time->DateString[5] = Time->Month/10 + '0';
	  Time->DateString[6] = Time->Month%10 + '0';
	}
	  else
	  {
	    Time->DateString[5] = ' ';
	    Time->DateString[6] = ' ';
	  }
	Time->DateString[7] = '/';
	if(hide_day<2)
	{
	  Time->DateString[8] = Time->Day/10 + '0';
	  Time->DateString[9] = Time->Day%10 + '0';
	}
	  else
	  {
	    Time->DateString[8] = ' ';
	    Time->DateString[9] = ' ';	    
	  }
	if(hide_week<2)
	{
	  week_value[0] = Time->Week%10 + '0';  //星期的数据另外放到 week_value[]数组里,跟年,月,日的分开存放,因为等一下要在最后显示
	}
	  else
	  {
	    week_value[0] = ' ';
	  }
	  week_value[1] = '\0';

	Time->DateString[10] = '\0'; //字符串末尾加 '\0' ,判断结束字符
}

void TimeToStr(SYSTEMTIME *Time)  //将时,分,秒数据转换成液晶显示字符放到数组 TimeString[];
{   if(hide_hour<2)
    {
	  Time->TimeString[0] = Time->Hour/10 + '0';
	  Time->TimeString[1] = Time->Hour%10 + '0';
	}
	  else
	    {
	      Time->TimeString[0] = ' ';
	      Time->TimeString[1] = ' ';
		}
	Time->TimeString[2] = ':';
    if(hide_min<2)
	{
	  Time->TimeString[3] = Time->Minute/10 + '0';
	  Time->TimeString[4] = Time->Minute%10 + '0';
	}
	  else
	    {
	      Time->TimeString[3] = ' ';
	      Time->TimeString[4] = ' ';
   	    }
	Time->TimeString[5] = ':';
    if(hide_sec<2)
    {
	  Time->TimeString[6] = Time->Second/10 + '0';
	  Time->TimeString[7] = Time->Second%10 + '0';
    }
      else
       {
         Time->TimeString[6] = ' ';
	     Time->TimeString[7] = ' ';
       }
	Time->DateString[8] = '\0';
}


void Initial_DS1302(void)   //时钟芯片初始化
{   
	unsigned char Second=Read1302(DS1302_SECOND);
	if(Second&0x80)	      //判断时钟芯片是否关闭	  
    {
	Write1302(0x8e,0x00); //写入允许
	Write1302(0x8c,0x07); //以下写入初始化时间 日期:07/07/25.星期: 3. 时间: 23:59:55
	Write1302(0x88,0x07);
	Write1302(0x86,0x25);
	Write1302(0x8a,0x07);
	Write1302(0x84,0x23);
	Write1302(0x82,0x59);
	Write1302(0x80,0x55);
	Write1302(0x8e,0x80); //禁止写入
	}

}

/***********ds18b20子程序*************************/

/***********ds18b20延迟子函数（晶振12MHz ）*******/ 

void delay_18B20(unsigned int i)
{
	while(i--);
}

/**********ds18b20初始化函数**********************/

void Init_DS18B20(void) 
{
	 unsigned char x=0;
	 DQ = 1;          //DQ复位
	 delay_18B20(8);  //稍做延时
	 DQ = 0;          //单片机将DQ拉低
	 delay_18B20(80); //精确延时 大于 480us
	 DQ = 1;          //拉高总线
	 delay_18B20(14);
	 x=DQ;            //稍做延时后 如果x=0则初始化成功 x=1则初始化失败
	 delay_18B20(20);
}

/***********ds18b20读一个字节**************/  

unsigned char ReadOneChar(void)
{
	uchar i=0;
	uchar dat = 0;
	for (i=8;i>0;i--)
	 {
		  DQ = 0; // 给脉冲信号
		  dat>>=1;
		  DQ = 1; // 给脉冲信号
		  if(DQ)
		  dat|=0x80;
		  delay_18B20(4);
	 }
 	return(dat);
}

/*************ds18b20写一个字节****************/  

void WriteOneChar(uchar dat)
{
 	unsigned char i=0;
 	for (i=8; i>0; i--)
 	{
  		DQ = 0;
 		DQ = dat&0x01;
    	delay_18B20(5);
 		DQ = 1;
    	dat>>=1;
 }
}

/**************读取ds18b20当前温度************/

void ReadTemp(void)
{
	unsigned char a=0;
	unsigned char b=0;
	unsigned char t=0;

	Init_DS18B20();
	WriteOneChar(0xCC);    	// 跳过读序号列号的操作
	WriteOneChar(0x44); 	// 启动温度转换

	delay_18B20(100);       // this message is wery important

	Init_DS18B20();
	WriteOneChar(0xCC); 	//跳过读序号列号的操作
	WriteOneChar(0xBE); 	//读取温度寄存器等（共可读9个寄存器） 前两个就是温度

	delay_18B20(100);