温度湿度检测程序实现

1、main.c #include #includeinclude 18b20.h#include 16O2.h#define uchar unsigned char#define uint unsigned int extern bit flag;void main()(uchar a;init();/1602初始化函数do(tmpchangeO； /DS18B20 开始转化温度 for(a=10;a0;a-)display(tmpO);/display(134) ;/1602 显示) while(l);)18b20.h#ifndef_18B20_H_#define_18B20_H_#defin

2、e uchar unsigned char#define uint unsigned int void delay(unsigned int count); void dsreset(void);bit tmpreadbit(void);uchar tmpread(void);void tmpwritebyte(uchar dat);void tmpchange(void);uint tmp();#endif18b20.c/*_:去 2 H 木口 L */ / / / / /if(kl 二二 0)delayms(30); if(kl=0)/ / / / / / / / / / / / / /

3、/if(flag_H)(H-;if(H 二二 255)(H = l;flag_H=0;)else(H + + ; TOC o 1-5 h z /)/if(k2=0)/delayms(30);/if(k2=0)/if(flag_H)H+;/else/H;/if(H=255)/H = l;/flag_H = l;/)/ )/ / )/if(flag_H)/tablel2=1-;/- / TOC o 1-5 h z /else/tablel2=1+1;/+/)/tablel3 = H/10+0;/2/tablel4 = H%10+10;/3/*算法2 H和L无符号数结束* write_com(0 x

4、80+0 x40);for(x=0;x15;x+)(write_date(tablelx);/ delay(15);)/*8b20女台石马*#include #define uchar unsigned char#define uint unsigned intsbit DS=P3A2;uint temp; 18b20 测温返回 16 位实参，例：236 (23.6)bit flag;void delay(uint count)(uint i;while(count)i=200;while(i0) i-； count-;)void dsreset(void)uint i;DS=0;i=103;

5、while(i0)i-;DS=1;i=4;while(i0)i-;)bit tmpreadbit(void)(uint i;bit dat;DS=0;i+ + ;DS = l;i+ + ;i +;dat=DS;i=8;while(i0)i-;return (dat);)uchar tmpread(void)(uchar ij.dat;dat=0;for(i = l;i=8;i+)j=tmpreadbit();dat=(j7)|(datl);读出的数据最低位在最前面，这样刚好一个字节在DAT)return(dat);)void tmpwritebyte(uchar dat) /write a b

6、yte to dsl8b20(uint i;uchar j;bit testb;for(j=l;jl;if(testb)(DS=0;i +;i +;DS=1;i=8;while(i0)i-;)else(DS=0;i=8;while(i0)i-;DS=1;i +;i +;)void tmpchange(void)(dsreset()；delay(l);tmpwritebyte(Oxcc);tmpwritebyte(0 x44);uint tmp()读取18B20的温度236显示23.6float tt;uchar a,b;dsreset();delay(l);tmpwritebyte(Oxcc)

7、;tmpwritebyte(Oxbe);a=tmpread();b=tmpread();temp=b;temp=8;temp=temp|a;判断正负温度值.temp如果为正flag为0,如果为负flag为1if(temp&0 xf800)=0 xf800)/1111 1000 0000 0000 为负温度值flag=l;temp 二temp+1; else flag=O;)tt=temp*0.0625;temp=tM0+0.5; /25,0625*10+0.5=250,625+0.5=251,125 约等于 251 (25.1)小数点后 一位四舍五入return temp; /0-65535

8、,-99.9+99.9 (0-999)返回 251)16O2,h#ifndef_1602_H_#define_1602_H_int delayms(unsigned char xms);int write_com(unsigned char com);写命令的函数体int write_date(unsigned char date);写数据的函数体int init();初始化函数体void display(uint x);/1602 显示程序#endif1602.C/*602 彳刃女台、娄攵*#include #define uchar unsigned char#define uint un

9、signed intuchar table二1,2,3,4,5,6,7,8,9;uchar tablel=/uchar tablel=2,;unsigned char x;char H,L; 算法 1/uchar H;算法 2extern bit flag;bit flag_H;sbit RS = P2A0;sbit RW = P2八 1;sbit EN = P2八2;sbit kl=PlAO;sbit k2=PlAl;sbit k3=PlA3;sbit k4=PlA4;sbit re=PlA7;sbit leng=PlA6;I*/int delayms(unsigned char xms)(

10、unsigned char x,y;for(x=xms;x0;x-)for(y=110;y0;y-);return 0;)int write_com(unsigned char com)写命令的函数体(RS = 0;RW = 0;PO = com;delayms(5);EN = 1;delayms(5);EN = 0;return 0;)int write_date(unsigned char date)写数据的函数体RS = 1;RW = 0;P0 = date; delayms(5);EN = 1; delayms(5); EN = 0;return 0;)int init()初始化函数体

11、(EN = 0;write_com(0X38);设置16*2显示，5*7点阵，8位数据接口 write_com(0X0C);设置开显示，不显示光标 write_com(0X06);写一个字符时，整屏右移 write_com(0X01);显示清零 return 0;)测试显示一个数值T ： +23.6C。，9个元素，-23.6 (236)void display(uint x)/1602 显示程序 251uchar i;uchar Al,A2,A2t,A3;/25.1C0ucharchar t_temp; 算法 1Al=x/100;A2t=x%100;A2=A2t/10;A3=A2t%10;/百

12、位2十位5个位1table0=0 x54;/Ttablel=0 x3a;/:t_temp=Al*10+A2;为正显示+ ,为负显示-进行判断if(flag=O) table2=0 x2b; /+/ t_temp=Al*10+A2;)else(table2=-;/+/ t_temp=Al*10+A2;t_temp=-t_temp+l;)/ table2=0 x2b; /+ table3=Al+0;/2 table4=A2+0;/3 table5=0 x2e;/.table6=A3+101;/6 table7=0 xdf;table8=C;write_com(0 x80);for(i=0;i200)/H=256%H;/ )/夫a算法 1 H和L有符号数* if(kl=0)delayms(30);if(kl=O)(H + + ;if(k2 二二 0)(delayms(30); if(k2=0) (H-;)if(H0)t_h =H + l;tablel2=1-;/-)elset_h=H;tablel2=1+1; /+tablel3=t_h/104-