基于单片机的温湿度采集与控制程序（C语言）

给你一个DS18B20的温度采集程序！

//ICC-AVR application builder : 2009-10-25 10:43:39

// Target : M16

// Crystal: 16.000Mhz

#include <iom16v.h>

#include <macros.h>

#define uint unsigned int

#define uchar unsigned char

#include "xianshi.c"

#include "delay.h"

#define CLR_DIR_1WIRE DDRD&=~BIT(4)//只要修改这里的参数就可以了

#define SET_DIR_1WIRE DDRD|=BIT(4) //里面什么都不用该！

#define CLR_OP_1WIRE PORTD&=~BIT(4)

#define SET_OP_1WIRE PORTD|=BIT(4)

#define CHECK_IP_1WIRE (PIND&0x10)//检测

unsigned char wmh,wml

void init_1820()

{

SET_DIR_1WIRE //设置PD4 为输出

SET_OP_1WIRE

CLR_OP_1WIRE

delay_nus(480) //480us以上

SET_OP_1WIRE

CLR_DIR_1WIRE

delay_nus(20) //15~60us

while(CHECK_IP_1WIRE)

SET_DIR_1WIRE

SET_OP_1WIRE

delay_nus(140) //60~240us

}

void write_1820(unsigned char x)

{

unsigned char m

for(m=0m<乎敏8m++)

{

CLR_OP_1WIRE

if(x&(1<<m))//写数巧森据了，先写低位的！

SET_OP_1WIRE

else

{CLR_OP_1WIRE}

delay_nus(40) //15~60us

SET_OP_1WIRE

}

SET_OP_1WIRE

}

unsigned char read_1820()

{

unsigned char temp,k,n

temp=0

for(n=0n<8n++)

{

CLR_OP_1WIRE

SET_OP_1WIRE

CLR_DIR_1WIRE

k=(CHECK_IP_1WIRE) //读数据,从低位开始

if(k)

temp|=(1<<n)

else

temp&=~(1<<n)

delay_nus(50)//60~120us

SET_DIR_1WIRE

}

return (temp)

}

unsigned int gettemp() //岁宽枝读取温度值

{

unsigned char temh,teml,wm0,wm1,wm2,wm3

init_1820() //复位18b20

write_1820(0xcc) // 发出转换命令

write_1820(0x44)

// delay_nms(800) //不延时也好使，不知道怎么回事！

init_1820()

write_1820(0xcc) //发出读命令

write_1820(0xbe)

teml=read_1820() //读数据

temh=read_1820()

wm0=teml>>4 //只要高8位的低四位和低8位的高四位，温度范围0~99啦！

wm1=temh<<4

wm2=wm1+wm0 //16进制转10进制

return wm2

}

void main()

{

uint tem,ad[4],i

port_init()

while(1)

{

tem = gettemp()

for(i=0i<4i++)

{

ad[3-i]=tem%10

tem=tem/10

}

for(i=0i<4i++)

{

show1(ad[i],i)

delay(5)

}

}

}

显示函数：

#include <iom16v.h>

#include <macros.h>

#define uint unsigned int

#define uchar unsigned char

#pragma data:code

const uint tab1[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,

0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E,0x00}//共阳数码管代码表

const uint tab2[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,

0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0X00}//共阴数码管代码表

void port_init(void)

{

DDRA = 0xFF

DDRB = 0xFF

DDRC = 0xFF

DDRD = 0x00

}

void delay(uint ms)

{

uint i,j

for(i=0i<msi++)

{

for(j=0j<1141j++)

}

}

void show1(uchar j,uchar k)//显示函数

{

PORTB = ~BIT(k)

PORTA = tab2[j]

delay(1)

}

void show(uint ada)

{

uint i,ad[4]

for(i=0i<4i++)

{

ad[3-i]=ada%10

ada = ada/10

}

while(1)

{

for(i=0i<4i++)

{

show1((ad[i]),i)

delay(100)

}

}

}

程序我都调试过的，都是好的，有不会再问我。可以给分了吗？嘿嘿

这是我自己用过的DS18B20的程序，有什么问题可以百度橡陆祥HI我，我这个是把温度显示到电脑上了，如果你要显示到LCD上的话可以在里面梁搏加一悉伍些子程序。

#include<reg52.h>

#include<stdio.h>

#define uint unsigned int

#define uchar unsigned char

sbit ds=P1^0

bit flag

uchar count_t0

float f_temp

void delay(uint z)

{

uint x,y

for(x=zx>0x--)

for(y=122y>0y--)

}

void init() // 串口初始化

{

TMOD=0x21

SCON=0x50

TH0=0x4c

TL0=0x00

TH1=0xf3

TL1=0xf3

EA=1

ET0=1

TR0=1

TR1=1

}

void timer0() interrupt 1

{

TH0=0x4c

TL0=0x00

if(++count_t0>=20)

{

count_t0=0

flag=1

}

}

void dsreset()

{

uint i

ds=0

i=103

while(i>0)

i--

ds=1

i=4

while(i>0)

i--

}

bit read_bit()

{

uint i

bit dat

ds=0i++

ds=1i++i++

dat=ds

i=8

while(i>0)

i--

return dat

}

uchar read_byte()

{

uchar i,j,dat

dat=0

for(i=1i<=8i++)

{

j=read_bit()

dat=(j<<7)|(dat>>1)

}

return dat

}

void write_byte(uchar dat)

{

uint i

uchar j

bit testb

for(j=1j<=8j++)

{

testb=dat&0x01

dat=dat>>1

if(testb)

{

ds=0

i++i++

ds=1

i=8

while(i>0)

i--

}

else

{

ds=0

i=8

while(i>0)

i--

ds=1

i++i++

}

}

}

void begin_change()

{

dsreset()

delay(1)

write_byte(0xcc)

write_byte(0x44)

}

float get_temp()

{

uchar a,b

uint temp

float f_temp

dsreset()

delay(1)

write_byte(0xcc)

write_byte(0xbe)

a=read_byte()

b=read_byte()

temp=b

temp<<=8

temp=temp|a

f_temp=temp*0.0625

temp=f_temp*10+0.5

f_temp=f_temp+0.05

return f_temp

}

void main()

{

init()

while(1)

{

if(flag==1)

{

flag=0

begin_change()

TI=1

printf("The tempeature is %f\n",get_temp())

while(!TI)

TI=0

}

}

}

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