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DS18B20单总线多点式测温系统

来源：动视网责编：小OO 时间：2025-09-24 08:44:04

DS18B20单总线多点式测温系统

DS18B20单总线多点式测温系统1(2011-01-1519:53:40)转载标签：ds18b20多点测量分类：DS18B20主文件：#include#includeunsigned intshu[]={0x30,0x31,0x32,0x33,0x34,0X35,0x36,0x37,0x38,0x39};unsignedlongt; voidflcd_1602() //当为负温度时，液晶显示可以高位为0屏蔽. { init(0x80);write_data(0x4e);

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导读DS18B20单总线多点式测温系统1(2011-01-1519:53:40)转载标签：ds18b20多点测量分类：DS18B20主文件：#include#includeunsigned intshu[]={0x30,0x31,0x32,0x33,0x34,0X35,0x36,0x37,0x38,0x39};unsignedlongt; voidflcd_1602() //当为负温度时，液晶显示可以高位为0屏蔽. { init(0x80);write_data(0x4e);

DS18B20单总线多点式测温系统1

(2011-01-15 19:53:40)

转载

标签：

ds18b20

多点测量	分类： DS18B20

主文件：

#include

unsigned int shu[]={0x30,0x31,0x32,0x33,0x34,0X35,0x36,0x37,0x38,0x39};

unsigned long t;

void flcd_1602() //当为负温度时，液晶显示可以高位为0屏蔽.

{

init(0x80);write_data(0x4e);//NO

init(0x81);write_data(0x4f);

init(0x82);write_data(0x80);

init(0x85);write_data(0x74);//temperature

init(0x86);write_data(0x65);

init(0x87);write_data(0x6d);

init(0x88);write_data(0x70);

init(0x);write_data(0x65);

init(0x8a);write_data(0x72);

init(0x8b);write_data(0x61);

init(0x8c);write_data(0x74);

init(0x8d);write_data(0x75);

init(0x8e);write_data(0x72);

init(0x8f);write_data(0x65);

init(0xc0);write_data(0x80);

init(0xc1);write_data(0x80);

init(0xc2);write_data(0x69); //is:

init(0xc3);write_data(0x73);

init(0xc4);write_data(0x3a);

if((t/1000)!=0)

{init(0xc5);write_data(0x2d);

init(0xc6);write_data(shu[t/1000]);

init(0xc7);write_data(shu[t/100]);

}

else

{init(0xc5);write_data(0xfe);

init(0xc6);write_data(0x2d);

init(0xc7);write_data(shu[t/100]);

}

init(0xc8);write_data(0x2e);

init(0xc9);write_data(shu[(t0)/10]);

init(0xca);write_data(shu[t]);

init(0xcb);write_data(0x27);

init(0xcc);write_data(0x43);

init(0xcd);write_data(0x80);

init(0xce);write_data(0x80);

init(0xcf);write_data(0x80);

}

void lcd_1602() //当为正温度时，液晶显示可以高位为0屏蔽.

{ init(0x80);write_data(0x4e);//NO

init(0x81);write_data(0x4f);

init(0x82);write_data(0x80);

init(0x84);write_data(0x80);

init(0x85);write_data(0x74); //temperature

init(0x86);write_data(0x65);

init(0x87);write_data(0x6d);

init(0x88);write_data(0x70);

init(0x);write_data(0x65);

init(0x8a);write_data(0x72);

init(0x8b);write_data(0x61);

init(0x8c);write_data(0x74);

init(0x8d);write_data(0x75);

init(0x8e);write_data(0x72);

init(0x8f);write_data(0x65);

init(0xc0);write_data(0x80);

init(0xc1);write_data(0x80);

init(0xc2);write_data(0x69); //is:

init(0xc3);write_data(0x73);

init(0xc4);write_data(0x3a);

if(t/10000!=0)

{init(0xc5);write_data(shu[t/10000]);

init(0xc6);write_data(shu[t/1000]);

init(0xc7);write_data(shu[t/100]);

}

else

{if((t/1000)!=0)

{init(0xc5);write_data(0xfe);

init(0xc6);write_data(shu[t/1000]);

init(0xc7);write_data(shu[t/100]);

}

else

{init(0xc5);write_data(0xfe);

init(0xc6);write_data(0xfe);

init(0xc7);write_data(shu[t/100]);}

}

init(0xc8);write_data(0x2e);

init(0xc9);write_data(shu[(t0)/10]);

init(0xca);write_data(shu[t]);

init(0xcb);write_data(0x27);

init(0xcc);write_data(0x43);

init(0xcd);write_data(0x80);

init(0xce);write_data(0x80);

init(0xcf);write_data(0x80);

}

void jiance() //初始化，即检测是否存在DS18B20.

{unsigned char k=0;

loop:DS=1;

DS=0; //主机将总线从高电平拉到低电平

del(100); //持续400us~960us

DS=1; //然后释放总线

del(10); //DS18B20检测到总线上升沿后，等待15us~60u后发低电平。

k=DS;

del(20); //低电平至少要持续60~240us

if(k==1) // 60~240us内若为高电平则要重新检测。

goto loop;

}

read() //从DS18B20中读出数据

{ unsigned char i;

unsigned long date=0;

for(i=0;i<16;i++)

{ DS=0; //主机在某一时刻将总线从高电平拉到低电平.

date>>=1;

DS=1;

del(3); //保持15us将总线拉到高电平,产生读时间隙

if(DS)

date|=0x8000;

del(8); //读数据需要持续35us~60us.

}

return(date);

}

void main()

{ unsigned long flag=0;

EA=0;

SP=0X60;

init(0x01); //对液晶屏初始化

init(0x38);

init(0x0c);

init(0x06);

while(1)

{

jiance(); //对DS18B20初始化

matchrom();

write(0x44); //启动温度变换

del(100);

jiance();

matchrom();

if(f==1)

{f=0;}

else

{ write(0xbe); // 读暂存存储器

t=read();

flag=t&0x8000; //对读取的数据进行处理

if(flag==0x8000)

{t=~t;

t=t+1;

t=t*25;

t>>=2;

flcd_1602();

}

else

{ t=t*25;

t>>=2;

lcd_1602();

}

头文件：#include

#ifndef __XUANZE_H__

#define __XUANZE_H__

unsigned char k,f=0;

sbit RS=P2^0;

sbit RW=P2^1;

sbit E=P2^2;

sbit DS=P1^1;

void del( int count ) //延时程序

{while(count--)

;

}

void delay(unsigned int count)//延时程序

{int p;

while(count--)

for(p=0;p<125;p++);

}

void write(unsigned char date)//向DS18B20中写入数据

{ int i;

for(i=0;i<8;i++) //由于是单总线每次只能写一位，一个字节需循环8次

{DS=0; //主机在某一时刻将总线从高电平拉到低电平，产生写时间隙

DS=date&0x01; // 写入数据。

del(15); //写如数据要15us,ds18b20对数据采样需要15us~60us，共需35us~70us.

DS=1;

date>>=1;

}

void init(unsigned int n)// RW=0,RS=0;向指令寄存器中写入命令，即对1602初始化。

{ delay(10);

E=0;

RS=0;

RW=0;

E=1;

P0=n;

E=0;

}

void write_data(unsigned char n)//RS=1,RW=0;向数据寄存器中写入数据，即显示的数符。

{delay(10);

E=0;

RS=1;

RW=0;

E=1;

P0=n;

E=0;

}

void matchrom() //匹配ROM

{

k=P3;

switch(k)

{ case 0: { f=1;

init(0x80);write_data(0x57);//which

init(0x81);write_data(0x68);

init(0x82);write_data(0x69);

init(0x83);write_data(0x63);

init(0x84);write_data(0x68);

init(0x85);write_data(0x80);

init(0x86);write_data(0x4e);//NO

init(0x87);write_data(0x4f);

init(0x88);write_data(0x79);//you

init(0x);write_data(0x6f);

init(0x8a);write_data(0x75);

init(0x8b);write_data(0x80);

init(0x8c);write_data(0x57);//want

init(0x8d);write_data(0x61);

init(0x8e);write_data(0x6e);

init(0x8f);write_data(0x74);

init(0xc0);write_data(0x70); //press

init(0xc1);write_data(0x72);

init(0xc2);write_data(0x65);

init(0xc3);write_data(0x73);

init(0xc4);write_data(0x73);

init(0xc5);write_data(0x80);

init(0xc6);write_data(0x57);//which

init(0xc7);write_data(0x68);

init(0xc8);write_data(0x69);

init(0xc9);write_data(0x63);

init(0xca);write_data(0x68);

init(0xcb);write_data(0x80);

init(0xcc);write_data(0x6b);//key

init(0xcd);write_data(0x65);

init(0xce);write_data(0x79);

init(0xcf);write_data(0x80); }break;

case 1: { init(0x83);write_data(0x31); //NO 1

write(0x55);

write(0x28);

write(0x30);

write(0xc5);

write(0xb8);

write(0x00);

write(0x8e); }break;

case 2: { init(0x83);write_data(0x32);//NO 2

write(0x55);

write(0x28);

write(0x31);

write(0xc5);

write(0xb8);

write(0x00);

write(0xb9); }break;

case 4: { init(0x83);write_data(0x33); //NO 3

write(0x55);

write(0x28);

write(0x32);

write(0xc5);

write(0xb8);

write(0x00);

write(0xe0); }break;

case 8: { init(0x83);write_data(0x34); //NO 4

write(0x55);

write(0x28);

write(0x33);

write(0xc5);

write(0xb8);

write(0x00);

write(0xd7); } break;

case 16: { init(0x83);write_data(0x35); //NO 5

write(0x55);

write(0x28);

write(0x34);

write(0xc5);

write(0xb8);

write(0x00);

write(0x52); } break;

case 32: { init(0x83);write_data(0x36); // NO 6

write(0x55);

write(0x28);

write(0x35);

write(0xc5);

write(0xb8);

write(0x00);

write(0x65); }break;

case : { init(0x83);write_data(0x37); //NO 7

write(0x55);

write(0x28);

write(0x36);

write(0xc5);

write(0xb8);

write(0x00);

write(0x3c); } break;

case 128: { init(0x83); write_data(0x38);//NO 8

write(0x55);

write(0x28);

write(0x37);

write(0xc5);

write(0xb8);

write(0x00);

write(0x0b); } break;

default:{

f=1;

init(0x80);write_data(0x50); //please

init(0x81);write_data(0x6c);

init(0x82);write_data(0x65);

init(0x83);write_data(0x61);

init(0x84);write_data(0x73);

init(0x85);write_data(0x65);

init(0x86);write_data(0x80);

init(0x87);write_data(0x70); //press

init(0x88);write_data(0x72);

init(0x);write_data(0x65);

init(0x8a);write_data(0x73);

init(0x8b);write_data(0x73);

init(0x8c);write_data(0x80);

init(0x8d);write_data(0x6f); //one

init(0x8e);write_data(0x6e);

init(0x8f);write_data(0x65);

init(0xc0);write_data(0x80);

init(0xc1);write_data(0x80);

init(0xc2);write_data(0x80);

init(0xc3);write_data(0x6b);//key

init(0xc4);write_data(0x65);

init(0xc5);write_data(0x79);

init(0xc6);write_data(0x80);

init(0xc7);write_data(0x6f);//only

init(0xc8);write_data(0x6e);

init(0xc9);write_data(0x6c);

init(0xca);write_data(0x79);

init(0xcb);write_data(0x80);

init(0xcc);write_data(0x21);//!

init(0xcd);write_data(0x80);

init(0xce);write_data(0x80);

init(0xcf);write_data(0x80); }break;

}

#endif

DS18B20单总线多点式测温系统--2

(2011-01-16 00:33:09)

转载

标签：

ds18b20

程序改进版

杂谈	分类： DS18B20

说明：较之第一个程序有很大的改善

缺点是：闪动的不准确，由于时间待早上改善

三个函数，一主函数二个头函数

主函数：#include

void delay(unsigned int count)//延时程序

{int p;

while(count--)

for(p=0;p<125;p++);

}

#include"LCD_Init.h"

#include"xuanze.h"

unsigned int shu[]={0x30,0x31,0x32,0x33,0x34,0X35,0x36,0x37,0x38,0x39};

unsigned long t;

void flcd_1602() //当为负温度时，液晶显示可以高位为0屏蔽.

{ LCD_dis_string(1,1,"NO "); //显示字符串

LCD_dis_string(5,1,"temperature"); //显示字符串temperature

LCD_dis_string(1,2," is:"); //显示字符串is:

if((t/1000)!=0)

{

LCD_write_command(0xc5);LCD_write_data(0x2d);

LCD_write_command(0xc6);LCD_write_data(shu[t/1000]);

LCD_write_command(0xc7);LCD_write_data(shu[t/100]);

}

else

{LCD_write_command(0xc5);LCD_write_data(0xfe);

LCD_write_command(0xc6);LCD_write_data(0x2d);

LCD_write_command(0xc7);LCD_write_data(shu[t/100]);

}

LCD_write_command(0xc8);LCD_write_data(0x2e);

LCD_write_command(0xc9);LCD_write_data(shu[(t0)/10]);

LCD_write_command(0xca);LCD_write_data(shu[t]);

LCD_write_command(0xcb);LCD_write_data(0x27);

LCD_write_command(0xcc);LCD_write_data(0x43);

LCD_write_command(0xcd);LCD_write_data(0x80);

LCD_write_command(0xce);LCD_write_data(0x80);

LCD_write_command(0xcf);LCD_write_data(0x80);

}

void lcd_1602() //当为正温度时，液晶显示可以高位为0屏蔽.

{

LCD_dis_string(1,1,"NO "); //显示字符串

LCD_dis_string(5,1,"temperature"); //显示字符串temperature

LCD_dis_string(5,2," is:"); //显示字符串is:

if(t/10000!=0)

{

LCD_write_command(0xc5);LCD_write_data(shu[t/10000]);

LCD_write_command(0xc6);LCD_write_data(shu[t/1000]);

LCD_write_command(0xc7);LCD_write_data(shu[t/100]);

}

else

{ if((t/1000)!=0)

{

LCD_write_command(0xc5);LCD_write_data(0xfe);

LCD_write_command(0xc6);LCD_write_data(shu[t/1000]);

LCD_write_command(0xc7);LCD_write_data(shu[t/100]);

}

else

{

LCD_write_command(0xc5);LCD_write_data(0xfe);

LCD_write_command(0xc6);LCD_write_data(0xfe);

LCD_write_command(0xc7);LCD_write_data(shu[t/100]);}

}

LCD_write_command(0xc8);LCD_write_data(0x2e);

LCD_write_command(0xc9);LCD_write_data(shu[(t0)/10]);

LCD_write_command(0xca);LCD_write_data(shu[t]);

LCD_write_command(0xcb);LCD_write_data(0x27);

LCD_write_command(0xcc);LCD_write_data(0x43);

LCD_write_command(0xcd);LCD_write_data(0x80);

LCD_write_command(0xce);LCD_write_data(0x80);

LCD_write_command(0xcf);LCD_write_data(0x80);

}

void Init_ds18b20() //初始化，即检测是否存在DS18B20.

{ unsigned char k=0;

loop:DS=1;

DS=0; //主机将总线从高电平拉到低电平

del(100); //持续400us~960us

DS=1; //然后释放总线

del(10); //DS18B20检测到总线上升沿后，等待15us~60u后发低电平。

k=DS;

del(20); //低电平至少要持续60~240us

if(k==1) // 60~240us内若为高电平则要重新检测。

goto loop;

}

read() //从DS18B20中读出数据

{

unsigned char i;

unsigned long date=0;

for(i=0;i<16;i++)

{ DS=0; //主机在某一时刻将总线从高电平拉到低电平.

date>>=1;

DS=1;

del(3); //保持15us将总线拉到高电平,产生读时间隙

if(DS)

date|=0x8000;

del(8); //读数据需要持续35us~60us.

}

return(date);

}

void main()

{ unsigned long flag=0;

EA=0;

SP=0X60;

LCD_init();

while(1)

{

Init_ds18b20(); //对DS18B20初始化

matchrom();

write(0x44); //启动温度变换

del(100);

Init_ds18b20();

matchrom();

if(f==1){f=0;}

else

{ write(0xbe); // 读暂存存储器

t=read();

flag=t&0x8000; //对读取的数据进行处理

if(flag==0x8000)

{ t=~t;

t=t+1;

t=t*25;

t>>=2;

flcd_1602();

}

else

{

t=t*25;

t>>=2;

lcd_1602();

}

头函数1：

#include"xuanze.h"

#ifndef __XUANZE_H__

#define __XUANZE_H__

unsigned char k,f=0;

sbit DS=P1^1;

void del( int count ) //延时程序

{while(count--)

;

}

void write(unsigned char date)//向DS18B20中写入数据

{ int i;

for(i=0;i<8;i++) //由于是单总线每次只能写一位，一个字节需循环8次

{DS=0; //主机在某一时刻将总线从高电平拉到低电平，产生写时间隙

DS=date&0x01; // 写入数据。

del(15); //写如数据要15us,ds18b20对数据采样需要15us~60us，共需35us~70us.

DS=1;

date>>=1;

}

void matchrom() //匹配ROM

{

k=P3;

switch(k)

{ case 0: //没有键按下，显示下面一串字符串

{

f=1;

LCD_dis_string(1,1,"which NOYOU WANT"); //显示字符串

LCD_dis_string(1,2,"press which key"); //显示字符串

}break;

case 1: { LCD_write_command(0x83);LCD_write_data(0x31); //NO 1

write(0x55);

write(0x28);

write(0x30);

write(0xc5);

write(0xb8);

write(0x00);

write(0x8e); }break;

case 2: {LCD_write_command(0x83);LCD_write_data(0x32);//NO 2

write(0x55);

write(0x28);

write(0x31);

write(0xc5);

write(0xb8);

write(0x00);

write(0xb9); }break;

case 4: { LCD_write_command(0x83);LCD_write_data(0x33); //NO 3

write(0x55);

write(0x28);

write(0x32);

write(0xc5);

write(0xb8);

write(0x00);

write(0xe0); }break;

case 8: { LCD_write_command(0x83);LCD_write_data(0x34); //NO 4

write(0x55);

write(0x28);

write(0x33);

write(0xc5);

write(0xb8);

write(0x00);

write(0xd7); } break;

case 16: { LCD_write_command(0x83);LCD_write_data(0x35); //NO 5

write(0x55);

write(0x28);

write(0x34);

write(0xc5);

write(0xb8);

write(0x00);

write(0x52); } break;

case 32: { LCD_write_command(0x83);LCD_write_data(0x36); // NO 6

write(0x55);

write(0x28);

write(0x35);

write(0xc5);

write(0xb8);

write(0x00);

write(0x65); }break;

case : { LCD_write_command(0x83);LCD_write_data(0x37); //NO 7

write(0x55);

write(0x28);

write(0x36);

write(0xc5);

write(0xb8);

write(0x00);

write(0x3c); } break;

case 128: {

LCD_write_command(0x83); LCD_write_data(0x38);//NO 8

write(0x55);

write(0x28);

write(0x37);

write(0xc5);

write(0xb8);

write(0x00);

write(0x0b); } break;

default: {

f=1;

LCD_dis_string(1,1,"please press one"); //显示字符串

LCD_dis_string(5,2," key only ! "); //显示字符串

}

#endif

头函数2：

#include"LCD_Init.h"

#ifndef __LCD_H__

#define __LCD_H__

#define LCDIO P0

sbit RS=P2^0;

sbit RW=P2^1;

sbit E=P2^2;

void LCD_write_command(unsigned int n)// RW=0,RS=0;向指令寄存器中写入命令.

{

delay(10);

E=0;

RS=0;

RW=0;

E=1;

LCDIO=n;

E=0;

}

LCD_init()

{

LCD_write_command(0x01); //对液晶屏初始化

LCD_write_command(0x38);

LCD_write_command(0x0c);

LCD_write_command(0x06);

}

void LCD_write_data(unsigned char n)//RS=1,RW=0;向数据寄存器中写入数据，即显示的数符。

{

delay(10);

E=0;

RS=1;

RW=0;

E=1;

P0=n;

E=0;

}

void LCD_dis_string(unsigned char X,unsigned char Y,unsigned char *s) //显示字符串

{

unsigned char address;

if(Y==1)address=0x80+X;

else address=0xc0+X;

LCD_write_command(address);

while(*s)

{

LCD_write_data(*s);

s++;

}

#endif

DS18B20单总线多点式测温系统

DS18B20单总线多点式测温系统1(2011-01-1519:53:40)转载标签：ds18b20多点测量分类：DS18B20主文件：#include#includeunsigned intshu[]={0x30,0x31,0x32,0x33,0x34,0X35,0x36,0x37,0x38,0x39};unsignedlongt; voidflcd_1602() //当为负温度时，液晶显示可以高位为0屏蔽. { init(0x80);write_data(0x4e);

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