基于单片机SHT11温湿度传感器电路图于程序

1、基于89C51单片机SHT11温湿度传感器电路图于程序作者：张志杰OH131w»*03*HQjM-i*7»II3mlM3:mi,/口gnvFi»文件：#ifndef_SHT11_H_#defineSHT11H/*SHT1加目关命令#defineucharunsignedchar#defineuintunsignedint#defineTEM_TEST#defineHUM_TEST#defineREG_READ#defineREG_WRITE#defineFUNCTION_SET0x03/温度检测命令0x05/湿度检测命令0x07/读寄存器0x06/写寄存器0x01

2、设置SHT11的工作精度为8位/湿度12位温度/*SHT1端口定义*/sbitSHT11_DATA=P3A1;sbitSHT11_SCK=P3AQ;sbitP33=P3A3;sbitP32=P3A2;sbitP36=P3A6;sbitP37=P3A7;ucharflag_tempeture=Q;/显示温度位置的标志ucharflag_humidity=Q;/显示湿度位置的标志温度图标ucharcodestr1=Qx1Q,QxQ6,QxQ9,QxQ8,QxQ8,QxQ9,QxQ6,QxQQ;/ucharcodestr6_sht11="%RH"ucharcodestr4_sht

3、11="humi=""/清除没不要的显示ucharcodestr2_sht11="temp="ucharcodestr7_sht11="/*函数名称：Delay()函数功能：SHT11内部延时*/voidDelay()/*函数名称：Delay_Ms()函数功能：SHT11检测等待延时函数说明：11ms/55ms/210ms分别对应8位/12位/14位测量结果对应的形参为N则延时Nms*/voidDelay_Ms(uintms)/ms延时函数(AT89C51uinti;ucharj;for(i=0;i<ms;i+)for(j=0;

4、j<200;j+);for(j=0;j<102;j+);/*函数功能：SHT11启动时序*/voidSHT11_Start()SHT11_SCK=1;SHT11_DATA=1;Delay();SHT11_DATA=0;Delay();SHT11_SCK=0;Delay();SHT11_SCK=1;Delay();SHT11_DATA=1;/函数名称：SHT11_Sendbyte(uchardat)函数功能：向SHT11发送8bite数据/voidSHT11_Sendbyte(uchardat)uchari;SHT11_SCK=0;Delay();for(i=0;i<8;i+)

5、if(dat&0x80)SHT11_DATA=1;Delay();)elseSHT11_DATA=0;Delay();)dat=dat<<1;SHT11_SCK=1;Delay();SHT11_SCK=0;函数名称SHT11_Answer()：函数功能：检测SHT11的响应信号(在第九个日钟周期)*/voidSHT11_Answer()(SHT11_SCK=1;Delay();while(SHT11_DATA=1);SHT11_SCK=0;SHT11_DATA=1;/函数名称：SHT11_Test_Finish()函数功能：检测SHT11温湿度检测是否完毕*/voidSHT

6、11_Test_Finish()(while(SHT11_DATA=1);/函数名称：SHT11_Receivebyte()函数功能：从SHT1俄U酿8bite数据*/ucharSHT11_Receivebyte()uchari;uchardat;SHT11_SCK=0;Delay();for(i=0;i<8;i+)(SHT11_SCK=1;Delay();dat=dat<<1;if(SHT11_DATA)(dat=dat|0x01;Delay();else(dat=dat&0xfe;Delay();SHT11_SCK=0;Delay();SHT11_DATA=1;/

7、释放数据总线return(dat);/*函数名称：MCU_Answer()函数功能：单片机向SHT11发送应答信号*/voidMCU_Answer()(SHT11_SCK=0;Delay();SHT11_DATA=0;Delay();SHT11_SCK=1;Delay();SHT11_SCK=0;Delay();SHT11_DATA=1;/释放数据总线这条指令非常重要不加的话导致单片机不能读取低位)/*函数名称：SHT11_End()当接收两个8byte数据后部接收CRC校验码/voidSHT11_End()(SHT11_DATA=1;SHT11_SCK=1;Delay();SHT11_SCK

8、=0;Delay();)/*函数名称：voidSHT11_Write_Register(ucharcommand,uchardat)函数说明：向SHT11的状态寄存器设置功能command为REG_WRITE0x0筋寄存器dat为设置SHT11的功能可以设置检测的数据位数*/voidSHT11_Write_Register(ucharcommand,uchardat)(SHT11_Start();SHT11_Sendbyte(command);SHT11_Answer();SHT11_Sendbyte(dat);SHT11_Answer();/*函数名称：ucharSHT11_Read_Reg

9、ister(ucharcommand)函数说明：command为REG_READ0x07/读寄存器返回值为状态寄存器的值位6显示当前检测完一次数据后电源供电情况当位6为0时表明VDD当位6为1时表明VDD即电量不足位0表明当前的测量分辨率当位0为1时表明测量精度：8位/湿度12位温度当位0为0时表明测量精度：12位湿度14位温度默认为0*/ucharSHT11_Read_Register(ucharcommand)(uchardat;SHT11_Start();SHT11_Sendbyte(command);SHT11_Answer();dat=SHT11_Receivebyte();SHT1

10、1_End();return(dat);/*函数名称：SHT11_Measure(ucharcommand,uinttime);函数功能：设置SHT11检测功能，并返回相应的检测结果函数说明：command形参用于设定温度检测还是湿度检测，time形参用于设定检测过程中的等待时间，以确定检测结果的位数11ms/55ms/210ms分别对应8位/12位/14位*/uintSHT11_Measure(ucharcommand,uchartime)uintdat=0;uchardata_high,data_low;SHT11_Start();SHT11_Sendbyte(command);SHT11

11、_Answer();Delay_Ms(time);SHT11_Test_Finish();data_high=SHT11_Receivebyte();MCU_Answer();data_low=SHT11_Receivebyte();SHT11_End();dat=(dat|data_high);dat=(dat<<8)|data_low;return(dat);/*函数名称:Convert_Tempeture12bit(uintdat);函数功能：将检测到的数据转化为相应的温度数据函数说明：温度转换公式-T=d1+d2*SOt公式中的参数d1=-40,d2=适用于12位测量精度*

12、/floatSHT11_Convert_Tempeture12bit(uintdat)floattempeture1;tempeture1=-40+*dat;if(tempeture1>23)tempeture1=tempeture1+1;if(tempeture1>55)tempeture1=tempeture1+1;if(P37=1)if(tempeture1>=16&&tempeture1<30)P33=1;P32=0;)elseP33=0;P32=1;return(tempeturel);)/*函数名称:SHT11_Convert_Humidit

13、y8bit(uintdat,floattemp)函数功能：将检测到的数据转化为相应的湿度数据SOrh函数说明：相对湿度转换公式一-RHline=C1+C2*SOrh+C3*SOrh*SOrh(检测数据的线性化为单片机接收到的数据)RHtrue=(tempeture-25)*(t1+t2*SOrh)+RHline公式中的参数：C1=-4,C2=0,648,C3=t1=,t2=适用于8位测量精度*/uintSHT11_Convert_Humidity8bit(uintdat,floattemp)floatRHline,RHtrue;uintr;RHline=-4+*dat*dat;RHtrue=(

14、temp-25)*+*dat)+RHline;r=(RHtrue-3)*10+;if(P37=0)if(r>=400&&r<600)P33=1;else(P33=0;)if(r>=600)(P32=1;)else(P32=0;)return(r);)#endif文件：#include<>#include""#defineucharunsignedchar#defineuintunsignedint#defineTEMTEST0x03/温度检测命令#defineHUMTEST0x05/湿度检测命令#defineREGREAD0x0

15、7/读寄存器#defineREGWRITE0x06/写寄存器#defineFUNCTIONSET0x01设置SHT11的工作精度为8位/湿度12位温度ucharDispData4=0,1,2,3;codeucharDispSegmentP010=0x3f,0x06,0x1b,0x0f,0x26,0x2d,0x3d,0x07,0x3f,0x2f;codeucharDispSegmentP210=0x00,0x00,0x22,0x22,0x22,0x22,0x22,0x00,0x22,0x22;/0123456789%codeucharDispCtrl4=0xef,0xdF,0xbf,0x7F;s

16、bitP16=P1A6;sbitP26=P2A6;sbitP34=P3A4;voidTemp_delay(unsignedintj)uchari;for(i=100;i>0;i-)for(j;j>0;j-);voidShow(uchar*Buffer)uchari;for(i=0;i<4;i+)P1=DispCtrli;P0=DispSegmentP0*Buffer;P2=DispSegmentP2*Buffer;if(P16=0)P26=1;Temp_delay(2);Buffer+;voidDispConvert(uchar*DispAddr,uintTemp2Con)DispAddr0=Temp2Con/1000;DispAddr1=(Temp2Con-DispAddr0*1000)/100;DispAddr2=(Temp2Con-DispAddr0*1000-DispAddr1*100)/10;DispAddr3=Temp2Con-DispAddr0*1000-DispAddr1*100-DispAddr2*10;voidmain()(uinttemp;uintdat;uintHum;/floatf;while(1)(Show(DispData);SHT11_Write_Register(REG_WRITE,