介绍

DS18B20采集温度
DS1302时钟当前时间
LCD12864作为显示（不带字库）
第一行显示年月日
第二行显示时分秒
第三行显示星期
第四行显示温度

Proteus仿真运行效果

源程序

主函数

#include<reg51.h>
#include <intrins.h>
#include "mine.h"
void main()
{ InitLCD();ds18b20Init();ds18b20Start();delayxms(1000);while(1){ds1302ReadTimeDate();Show();}
}

DS1302时钟函数

#include "mine.h"
#include "intrins.h"
uchar ReadAddr[7] = {0x81, 0x83, 0x85, 0x87, 0x89, 0x8b, 0x8d}; 
uchar WriteAddr[7] = {0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c};
uchar NowTimeDate[7];
/*写字节*/
void ds1302WriteByte(uchar addr,uchar dat)
{uchar i=0;RST=0;_nop_();	CLK=0;_nop_();RST=1;_nop_();for(i=0;i<8;i++)//先写低位再写高位{IO=addr&0x01;addr>>=1;CLK=1;_nop_();CLK=0;_nop_();		}for(i=0;i<8;i++){IO=dat&0x01;dat>>=1;CLK=1;_nop_();CLK=0;_nop_();		}RST=0;_nop_();	
}
/*读字节*/
uchar ds1302ReadByte(uchar addr)
{uchar i=0,temp=0,value=0;RST=0;_nop_();	CLK=0;_nop_();RST=1;_nop_();for(i=0;i<8;i++){IO=addr&0x01;addr>>=1;	CLK=1;_nop_();CLK=0;_nop_();		}for(i=0;i<8;i++){temp=IO;value=(temp<<7)|(value>>1);CLK=1;_nop_();CLK=0;_nop_();		}RST=0;_nop_();	CLK=1;_nop_();IO = 0;_nop_();IO = 1;_nop_();	return value;		
}
/*ds1302初始化，可自己写入初始时间，不写入则同步电脑的*/
void ds1302_init()
{
//	uchar i=0;
//	ds1302_write_byte(0x8E,0X00);
//	for(i=0;i<7;i++)
//	{
//		ds1302_write_byte(gWRITE_RTC_ADDR[i],gDS1302_TIME[i]);	
//	}ds1302WriteByte(0x8E,0X80);	
}
/*读取时间和日期*/
void ds1302ReadTimeDate()
{uchar i=0;for(i=0;i<7;i++){NowTimeDate[i]=ds1302ReadByte(ReadAddr[i]);	}	
}
/*显示*/
void Show()
{int Tempture; uchar i;uchar Time[5],Date[8];uint Bai,Shi;/*把时间取出来并显示*时*分*秒*/Time[0]=NowTimeDate[2]/16;Time[1]=NowTimeDate[2]&0x0f;Time[2]=NowTimeDate[1]/16;Time[3]=NowTimeDate[1]&0x0f;Time[4]=NowTimeDate[0]/16;Time[5]=NowTimeDate[0]&0x0f;for(i=4;i<6;i++)DisplayZf(2,2,(i+1)*8,Time[i]);for(i=0;i<2;i++)DisplayHz(1,2,i*16,i+2);DisplayZf(1,2,32,10);DisplayZf(1,2,56,Time[0]);DisplayZf(2,2,0,Time[1]);DisplayZf(2,2,8,10);for(i=2;i<4;i++)DisplayZf(2,2,i*8,Time[i]);DisplayZf(2,2,32,10);/*把日期取出来并显示*年*月*日*/Date[0]=2;Date[1]=0;Date[2]=NowTimeDate[6]/16;Date[3]=NowTimeDate[6]&0x0f;Date[4]=NowTimeDate[4]/16;Date[5]=NowTimeDate[4]&0x0f;Date[6]=NowTimeDate[3]/16;Date[7]=NowTimeDate[3]&0x0f;Date[8]=NowTimeDate[5]&0x0f;for(i=0;i<2;i++)DisplayHz(1,0,i*16,i+4);DisplayZf(1,0,32,10);for(i=0;i<3;i++)DisplayZf(1,0,(i+5)*8,Date[i]);DisplayZf(2,0,0,Date[3]);DisplayZf(2,0,8,12);for(i=4;i<6;i++)DisplayZf(2,0,(i-2)*8,Date[i]);DisplayZf(2,0,32,12);for(i=6;i<8;i++)DisplayZf(2,0,(i-1)*8,Date[i]);/*读星期并显示出来*/DisplayHz(1,4,0,6);DisplayHz(1,4,16,5);DisplayZf(1,4,32,10);DisplayHz(2,4,8,6);DisplayHz(2,4,24,5);DisplayXingQi(2,4,40,Date[8]-2);/*读温度并显示出来*/Tempture=ds18b20ReadTemperture()*10;if(Tempture<0){Tempture=-Tempture;DisplayZf(2,6,16,12);}else {DisplayZf(2,6,16,11);}Bai=Tempture/100;Shi=(Tempture%100)/10;/******温度:*.*°*C*********/for(i=0;i<2;i++)  DisplayHz(1,6,i*16,i);DisplayZf(1,6,32,10);DisplayZf(2,6,24,Bai);DisplayZf(2,6,32,Shi);DisplayZf(2,6,40,14);DisplayZf(2,6,48,15);
}

DS18B20函数

#include<intrins.h>
#include "mine.h"
/***************复位**********/
void ds18b20Reset()
{DQ=0;delay10us(75);//拉低DQ,750us（480~960）DQ=1;delay10us(2);//DQ=1,20US（15~60）
}
/*******检测18b20是否存在**********/
uchar ds18b20Check()
{uchar time_temp=0;while(DQ&&time_temp<20)	//等待DQ为低电平,如果一直高电平且超过200us退出,{time_temp++;delay10us(1);}if(time_temp>=20)return 1;//ds18b20没有响应else time_temp=0;//检测到ds18b20while((!DQ)&&time_temp<20){time_temp++;delay10us(1);}if(time_temp>=20)return 1;	//如果超时则强制返回1return 0;//检测到响应
}
/*********温度读取（一位）**********/
uchar ds18b20ReadBit()
{uchar dat=0;DQ=0;_nop_();_nop_();DQ=1;_nop_();_nop_();if(DQ)dat=1;	//读1else dat=0;//读0delay10us(5);return dat;
} 
/*******温度读取（一个字节）**********/
uchar ds18b20ReadByte()
{uchar i=0,dat=0,temp=0;for(i=0;i<8;i++)//循环8次，每次读取一位，且先读低位再读高位{temp=ds18b20ReadBit();dat=(temp<<7)|(dat>>1);//temp左移7位或上dat右移1位}return dat;	
}
/*******温度写入（一个字节）**********/
void ds18b20WriteByte(uchar dat)
{uchar i=0,temp=0;for(i=0;i<8;i++)//循环8次，每次写一位，且先写低位再写高位{temp=dat&0x01;//取出低位，选择低位准备写入dat>>=1;//将次高位移到低位右移if(temp){DQ=0;_nop_();_nop_();DQ=1;delay10us(6);//至少60us}else{DQ=0;delay10us(6);DQ=1;_nop_();_nop_();	}	}	
}
void ds18b20Start()
{ds18b20Reset();//复位ds18b20Check();//检查DS18B20ds18b20WriteByte(0xcc);//SKIP ROMds18b20WriteByte(0x44);//转换命令	
}
uchar ds18b20Init()
{ds18b20Reset();return ds18b20Check();	
}
/***********温度读取*********/
float ds18b20ReadTemperture()
{float temp;uchar datH=0,datL=0;uint value=0;ds18b20Start();//开始转换ds18b20Reset();//复位ds18b20Check();ds18b20WriteByte(0xcc);//SKIP ROMds18b20WriteByte(0xbe);//读存储器datL=ds18b20ReadByte();//低字节datH=ds18b20ReadByte();//高字节value=(datH<<8)+datL;//合并为16位数据if((value&0xf800)==0xf800)//0xf800（1111 1000 0000 0000）判断符号位，负温度(前五位正负后五位温度){value=(~value)+1; //数据取反再加1temp=value*(-0.0625);//乘以精度	}else //正温度{temp=value*0.0625;	}return temp;
}

LCD12864（不带字库）

#include<reg51.h>
#include "mine.h"
uchar code Hzk[]=
{/***********************************温*****************************************/0x10,0x60,0x02,0x8C,0x00,0x00,0xFE,0x92,0x92,0x92,0x92,0x92,0xFE,0x00,0x00,0x00,0x04,0x04,0x7E,0x01,0x40,0x7E,0x42,0x42,0x7E,0x42,0x7E,0x42,0x42,0x7E,0x40,0x00,/***********************************度*****************************************/0x00,0x00,0xFC,0x24,0x24,0x24,0xFC,0x25,0x26,0x24,0xFC,0x24,0x24,0x24,0x04,0x00,0x40,0x30,0x8F,0x80,0x84,0x4C,0x55,0x25,0x25,0x25,0x55,0x4C,0x80,0x80,0x80,0x00,/***********************************时*****************************************/0x00,0xFC,0x84,0x84,0x84,0xFC,0x00,0x10,0x10,0x10,0x10,0x10,0xFF,0x10,0x10,0x00,0x00,0x3F,0x10,0x10,0x10,0x3F,0x00,0x00,0x01,0x06,0x40,0x80,0x7F,0x00,0x00,0x00,/***********************************间*****************************************/0x00,0xF8,0x01,0x06,0x00,0xF0,0x12,0x12,0x12,0xF2,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x1F,0x11,0x11,0x11,0x1F,0x00,0x40,0x80,0x7F,0x00,0x00,/***********************************日*****************************************/0x00,0x00,0x00,0xFE,0x82,0x82,0x82,0x82,0x82,0x82,0x82,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0xFF,0x00,0x00,0x00,0x00,/***********************************期*****************************************/0x00,0x04,0xFF,0x24,0x24,0x24,0xFF,0x04,0x00,0xFE,0x22,0x22,0x22,0xFE,0x00,0x00,0x88,0x48,0x2F,0x09,0x09,0x19,0xAF,0x48,0x30,0x0F,0x02,0x42,0x82,0x7F,0x00,0x00,/***********************************星*****************************************/0x00,0x00,0x00,0xBE,0x2A,0x2A,0x2A,0xEA,0x2A,0x2A,0x2A,0x3E,0x00,0x00,0x00,0x00,0x00,0x44,0x42,0x49,0x49,0x49,0x49,0x7F,0x49,0x49,0x49,0x49,0x41,0x40,0x00,0x00,/*****************************宋体小四（64*64）********************************/
};uchar code Zfk[]=
{/**************************************0~9************************************/0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,0x00,0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,0x70,0x08,0x08,0x08,0x08,0xF0,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,0x00,0x30,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x18,0x20,0x21,0x21,0x22,0x1C,0x00,0x00,0x00,0x80,0x40,0x30,0xF8,0x00,0x00,0x00,0x06,0x05,0x24,0x24,0x3F,0x24,0x24,0x00,0xF8,0x88,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x20,0x20,0x20,0x11,0x0E,0x00,0x00,0xE0,0x10,0x88,0x88,0x90,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x20,0x1F,0x00,0x00,0x18,0x08,0x08,0x88,0x68,0x18,0x00,0x00,0x00,0x00,0x3E,0x01,0x00,0x00,0x00,0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,0x00,0xF0,0x08,0x08,0x08,0x10,0xE0,0x00,0x00,0x01,0x12,0x22,0x22,0x11,0x0F,0x00,/**********************************:,+,-,.,°,C,~*********************************/0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x0F,0x01,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0C,0x12,0x12,0x0C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x01,0x02,0x02,0x04,0x02,0x00,};
code XingQi[]=
{0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x00,0x00,0x00,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x00,0x00,0x04,0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x04,0x00,0x00,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x00,	0x00,0xFC,0x04,0x04,0x04,0xFC,0x04,0x04,0x04,0xFC,0x04,0x04,0x04,0xFC,0x00,0x00,0x00,0x7F,0x28,0x24,0x23,0x20,0x20,0x20,0x20,0x21,0x22,0x22,0x22,0x7F,0x00,0x00,0x00,0x02,0x42,0x42,0x42,0xC2,0x7E,0x42,0x42,0x42,0x42,0xC2,0x02,0x02,0x00,0x00,0x40,0x40,0x40,0x40,0x78,0x47,0x40,0x40,0x40,0x40,0x40,0x7F,0x40,0x40,0x40,0x00,0x20,0x20,0x20,0x20,0x20,0x20,0x21,0x22,0x2C,0x20,0x20,0x20,0x20,0x20,0x20,0x00,0x00,0x40,0x20,0x10,0x0C,0x03,0x00,0x00,0x00,0x01,0x02,0x04,0x18,0x60,0x00,0x00,0x00,0x00,0x00,0xFE,0x82,0x82,0x82,0x82,0x82,0x82,0x82,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0xFF,0x00,0x00,0x00,0x00,
};
/*检查是否忙*/
void busy()		
{uchar dat;rs=0;rw=1; do{P0=0x00;e=1;	dat=P0;e=0;dat=0x80 & dat; }while(!(dat==0x00));
}
/*写数据到LCD中*/
void W_Data(uchar dat)
{busy();rs=1;rw=0;P0=dat;e=1;e=0;
}
/*写命令到LCD中*/
void W_Cmd(uchar cmd)
{busy();rs=0;rw=0;P0=cmd;e=1;e=0;
}
/*设置页(8行为一页，共64行即8页(0~7页)*/
void S_Page(uchar page)
{page=0xb8|page;//只有0~7页W_Cmd(page);
}
/*起始行*/
void S_StartHang(uchar hang)
{hang=0xc0|hang;W_Cmd(hang);
}
/*设定列*/
void S_Lie(uchar lie)
{lie=lie&0x3f;//lie&(0011 1111),列大于63自动从零列lie=0x40|lie;W_Cmd(lie);
}
/*开(关)显示*/
void S_OnOff(uchar onoff)
{onoff=0x3e|onoff;//(0011 1110)|onoff,0关1开W_Cmd(onoff);
}
/*屏幕选择*/
void S_Screen(uchar screen)
{ switch(screen){case 0:cs1=0;cs2=0;break;//全屏case 1:cs1=0;cs2=1;break;//左屏case 2:cs1=1;cs2=0;break;//右屏}
}
/*清屏*/
void ClS(uchar screen)
{uchar i,j;S_Screen(screen);//选择清除那个屏for(i=0;i<8;i++){S_Page(i);S_Lie(0);for(j=0;j<64;j++)W_Data(0x00);}
}
/*初始化*/
void InitLCD()
{busy();S_Screen(0);S_OnOff(0);S_Screen(0);S_OnOff(1);S_Screen(0);ClS(0);S_StartHang(0);
}
/*显示*/
void DisplayHz(uchar s,uchar page,uchar lie,uchar number)
{int i;	S_Screen(s);lie=lie&0x3f;S_Page(page);S_Lie(lie);for(i=0;i<16;i++)  W_Data(Hzk[i+32*number]);//显示汉字上半部分S_Page(page+1);S_Lie(lie);	  for(i=0;i<16;i++)	  W_Data(Hzk[i+32*number+16]);//显示汉字下半部分
} 
void DisplayZf(uchar s,uchar page,uchar lie,uchar number)
{int i;S_Screen(s);lie=lie&0x3f;S_Page(page);S_Lie(lie);for(i=0;i<8;i++)  W_Data(Zfk[i+16*number]);S_Page(page+1);S_Lie(lie);	  for(i=8;i<16;i++)	  W_Data(Zfk[i+16*number]);
}
void DisplayXingQi(uchar s,uchar page,uchar lie,uchar number)
{int i;	S_Screen(s);lie=lie&0x3f;S_Page(page);S_Lie(lie);for(i=0;i<16;i++)  W_Data(XingQi[i+32*number]);//显示汉字上半部分S_Page(page+1);S_Lie(lie);	  for(i=0;i<16;i++)	  W_Data(XingQi[i+32*number+16]);//显示汉字下半部分
} 

sharing函数

#include<reg51.h>
#include "mine.h"
void T0_init()
{TMOD=0x01;//设置定时器0TH0=0x3c;//装初值TL0=0xb0;EA=1;//开总中断ET0=1;//开定时器0中断TR0=1;//启动定时器0
}
void delay10us(uint us)
{while(us--);	
}
void delayxms(uint x)
{uint i,j;for(i=0;i<x;i++)for(j=0;j<110;j++);
}

mine头文件

#ifndef _MINE_H          
#define _MINE_H
#include<reg51.h>
#define uint unsigned int
#define uchar unsigned char
/**************************************ds18b20模块声明*******************************
复位*检查是否存在*读一位*读一个字节*写一个字节*开始读温度*初始*读温度并转换*显示温度*
************************************************************************************/
void ds18b20Rest();
uchar ds18b20Check();
uchar ds18b20ReadBit();
uchar ds18b20ReadByte();
void ds18b20WriteByte(uchar dat);
void ds18b20Start();
uchar ds18b20Init();
float ds18b20ReadTemperture();
void TemptureDisplay();
sbit DQ=P3^3;
/*************************LCD12864模块声明**************************
查忙*写数据*写命令*设定页数(共四行八页0~7)*起始行*列数(64列0~63)****
开关*清屏*初始化*显示汉字（16*16（宽*高））*显示字符(8*16（宽*高）)*
*******************************************************************/
void busy();
void W_Data(uchar dat);
void W_Cmd(uchar cmd);	
void S_Page(uchar page);
void S_StartHang(uchar hang);
void S_Lie(uchar lie);
void S_OnOff(uchar onoff);
void S_Screen(uchar screen);
void ClS(uchar screen);
void InitLCD();
void DisplayHz(uchar s,uchar page,uchar lie,uchar number);
void DisplayZf(uchar s,uchar page,uchar lie,uchar number);
void DisplayXingQi(uchar s,uchar page,uchar lie,uchar number);
sbit rs=P2^0;
sbit rw=P2^1;
sbit e=P2^2;
sbit cs1=P2^3;
sbit cs2=P2^4;
/**************************************ds1302模块声明*******************************
初始化*读时间日期*写字节*
************************************************************************************/
//变量声明
void ds1302_init();
void ds1302ReadTimeDate();
void ds1302WriteByte(uchar addr,uchar dat);
extern uchar NowTimeDate[7];//存储时间日期
sbit RST=P1^2;
sbit CLK=P1^1;
sbit IO=P1^0;
/***********共用模块声明*********
定时器T0初始化*延时10us*延时xms*/
void T0_init();
void delay10us(uint us);
void delayxms(uint x);
#endif

有无大佬知道怎么把取得字模数据能存放到独立的文件里