ds1302+lcd1602.txt

stc52单片机ds1302-lcd1602的例子

/*时钟程序,这个例子其实就是时钟例子和LCD1602的简单结合，可先了解下这两个例子后再来分析这个例子就容易些了*/

#include <reg51.h>
#include <intrins.h>

sbit SCL2=P1^3;		//SCL2定义为P1口的第3位脚，连接DS1302SCL和ADC0831SCL脚
sbit SDA2=P1^4;		//SDA2定义为P1口的第4位脚，连接DS1302SCL和ADC0831SDA脚
//sbit CS2=P1^6;		//CS2定义为P1口的第4位脚，连接ADC0831CS脚
sbit RST = P1^5;   // DS1302片选脚

sbit LCD_RS=P1^0;
sbit LCD_RW=P1^1;
sbit LCD_E=P1^2;
#define LCD_Data P2
#define Busy    0x80

unsigned char l_tmpdate[8]={0x00,0x06,0x03,0x0A,0x08,0x07,0x08,0};//读时间的续冲，初始值是写入的时间，
									//秒，分，时，日，月，星期，年，
unsigned char l_tmpdisplay[16]={"Data 20        "};			//设好显示的开头
unsigned char l_tmpdisplay2[16]={"time "};
code unsigned char write_rtc_address[7]={0x80,0x82,0x84,0x86,0x88,0x8a,0x8c}; //写时间的地址
//code unsigned char write_rtc_address2[3]={0x86,0x88,0x8c};// 0x8a,}; 

code unsigned char read_rtc_address[7]={0x81,0x83,0x85,0x87,0x89,0x8b,0x8d};	//读时间的地址


void delay();//延时子函数，5个空指令
void Write_Ds1302_byte(unsigned char temp); 
void Write_Ds1302( unsigned char address,unsigned char dat );
unsigned char Read_Ds1302 ( unsigned char address );

void Read_RTC(void);//read RTC 
void Set_RTC(void);//set RTC 

void WriteDataLCD(unsigned char WDLCD);
void WriteCommandLCD(unsigned char WCLCD,BuysC);
unsigned char ReadDataLCD(void);
unsigned char ReadStatusLCD(void);
void LCDInit(void);
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char *DData);
void Delay5Ms(void);
void Delay400Ms(void);

void main(void)     //入口函数
{
	Set_RTC();		//写时间
	Delay400Ms(); //启动等待，等LCD讲入工作状态
 	LCDInit(); //LCM初始化
	Delay5Ms();
	while(1){
		Read_RTC();
			l_tmpdisplay[7]=(l_tmpdate[6]/16)+0X30;			//这里加上0X30是在ASCII字符编码中的地址，你们可以查下ASCII码
											//这里除以16怎么不是除以10呢，是的，这是因为DS1302里面是按10进制存放的
			l_tmpdisplay[8]=(l_tmpdate[6]&0x0f)+0X30;
			l_tmpdisplay[9]=0X3A;						
			l_tmpdisplay[10]=(l_tmpdate[4]/16)+0X30;
			l_tmpdisplay[11]=(l_tmpdate[4]&0x0f)+0X30;
			l_tmpdisplay[12]=0X3A;
			l_tmpdisplay[13]=(l_tmpdate[3]/16)+0X30;
			l_tmpdisplay[14]=(l_tmpdate[3]&0x0f)+0X30;	
			DisplayListChar(0, 0, l_tmpdisplay);		//输出液晶显示
		
			l_tmpdisplay2[5]=(l_tmpdate[2]/16)+0X30;
			l_tmpdisplay2[6]=(l_tmpdate[2]&0x0f)+0X30;
			l_tmpdisplay2[7]=0X3A;
			l_tmpdisplay2[8]=(l_tmpdate[1]/16)+0X30;
			l_tmpdisplay2[9]=(l_tmpdate[1]&0x0f)+0X30;
			l_tmpdisplay2[10]=0X3A;
			l_tmpdisplay2[11]=(l_tmpdate[0]/16)+0X30;
			l_tmpdisplay2[12]=(l_tmpdate[0]&0x0f)+0X30;
			DisplayListChar(0, 5, l_tmpdisplay2);
			
	}
}

void delay(void)								//空5个指令
{
	unsigned char i=10;
	while(i)
		i--;
}
void Write_Ds1302_Byte(unsigned  char temp) 
{
 unsigned char i;
 for (i=0;i<8;i++)     	//循环8次 写入数据
  { 
   SCL2=0;
     SDA2=temp&0X01;     	//每次传输低字节 
     temp>>=1;  		//右移一位
     SCL2=1;
   }
}   

/****************************************************************************/
void Write_Ds1302( unsigned char address,unsigned char dat )     
{
 	RST=0;
	_nop_();
 	SCL2=0;
	_nop_();
 	RST=1;	
   	_nop_();   //启动
 	Write_Ds1302_Byte(address);	//发送地址
 	Write_Ds1302_Byte(dat);		//发送数据
 	RST=0;  		//恢复
}
/****************************************************************************/
unsigned char Read_Ds1302 ( unsigned char address )
{
 	unsigned char i,temp=0x00;
 	RST=0;
	_nop_();
 	SCL2=0;
	_nop_();
 	RST=1;
	_nop_();
 	Write_Ds1302_Byte(address);
 	for (i=0;i<8;i++) 		//循环8次 读取数据
 	{		
 		if(SDA2)
 		temp|=0x80;			//每次传输低字节
		SCL2=0;
		temp>>=1;			//右移一位
 		SCL2=1;
	} 
 	RST=0;
	_nop_();		//以下为DS1302复位的稳定时间
 	RST=0;
	SCL2=0;
	_nop_();
	SCL2=1;
	_nop_();
	SDA2=0;
	_nop_();
	SDA2=1;
	_nop_();
	return (temp);			//返回
}
/****************************************************************************/
void Read_RTC(void)		//读取 日历
{
 unsigned char i,*p;
 p=read_rtc_address; 	//地址传递
 for(i=0;i<7;i++)		//分7次读取 年月日时分秒星期
 {
  l_tmpdate[i]=Read_Ds1302(*p);
  p++;
 }
}
/***********************************************************************/
void Set_RTC(void)		//设定 日历
{
	unsigned char i,*p,tmp;
	for(i=0;i<7;i++){
		tmp=l_tmpdate[i]/10;
		l_tmpdate[i]=l_tmpdate[i]%10;
		l_tmpdate[i]=l_tmpdate[i]+tmp*16;
	}
 	Write_Ds1302(0x8E,0X00);
	
 	p=write_rtc_address;	//传地址	
 	for(i=0;i<7;i++)		//7次写入 年月日时分秒星期
 	{
		  Write_Ds1302(*p,l_tmpdate[i]);
 		 p++;  
	 }
	 Write_Ds1302(0x8E,0x80);
}

//写数据
void WriteDataLCD(unsigned char WDLCD)
{
 ReadStatusLCD(); //检测忙
 LCD_Data = WDLCD;
 LCD_RS = 1;
 LCD_RW = 0;
 LCD_E = 0; //若晶振速度太高可以在这后加小的延时
 LCD_E = 0; //延时
 LCD_E = 1;
}

//写指令
void WriteCommandLCD(unsigned char WCLCD,BuysC) //BuysC为0时忽略忙检测
{
 if (BuysC) ReadStatusLCD(); //根据需要检测忙
 LCD_Data = WCLCD;
 LCD_RS = 0;
 LCD_RW = 0; 
 LCD_E = 0;
 LCD_E = 0;
 LCD_E = 1; 
}

//读数据
unsigned char ReadDataLCD(void)
{
 LCD_RS = 1; 
 LCD_RW = 1;
 LCD_E = 0;
 LCD_E = 0;
 LCD_E = 1;
 return(LCD_Data);
}

//读状态
unsigned char ReadStatusLCD(void)
{
 LCD_Data = 0xFF; 
 LCD_RS = 0;
 LCD_RW = 1;
 LCD_E = 0;
 LCD_E = 0;
 LCD_E = 1;
 while (LCD_Data & Busy); //检测忙信号
 return(LCD_Data);
}

void LCDInit(void) //LCM初始化
{
 LCD_Data = 0;
 WriteCommandLCD(0x38,0); //三次显示模式设置，不检测忙信号
 Delay5Ms(); 
 WriteCommandLCD(0x38,0);
 Delay5Ms(); 
 WriteCommandLCD(0x38,0);
 Delay5Ms(); 

 WriteCommandLCD(0x38,1); //显示模式设置,开始要求每次检测忙信号
 WriteCommandLCD(0x08,1); //关闭显示
 WriteCommandLCD(0x01,1); //显示清屏
 WriteCommandLCD(0x06,1); // 显示光标移动设置
 WriteCommandLCD(0x0C,1); // 显示开及光标设置
}

//按指定位置显示一个字符
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
 Y &= 0x1;
 X &= 0xF; //限制X不能大于15，Y不能大于1
 if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
 X |= 0x80; // 算出指令码
 WriteCommandLCD(X, 0); //这里不检测忙信号，发送地址码
 WriteDataLCD(DData);
}

//按指定位置显示一串字符
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char *DData)
{
 unsigned char ListLength;

  ListLength = 0;
 Y &= 0x1;
 X &= 0xF; //限制X不能大于15，Y不能大于1
 while (DData[ListLength]>=0x20) //若到达字串尾则退出
  {
   if (X <= 0xF) //X坐标应小于0xF
    {
     DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
     ListLength++;
     X++;
    }
  }
}

//5ms延时
void Delay5Ms(void)
{
 unsigned int TempCyc = 5552;
 while(TempCyc--);
}

//400ms延时
void Delay400Ms(void)
{
 unsigned char TempCycA = 5;
 unsigned int TempCycB;
 while(TempCycA--)
 {
  TempCycB=7269;
  while(TempCycB--);
 };
}