1、-. z基于89C51單片機(jī)SHT11溫濕度傳感器電路圖于程序張志杰SHT11.h文件：#ifndef _SHT11_H_#define _SHT11_H_/*SHT11相關(guān)命令*/#define uchar unsigned char#define uint unsigned int#define TEM_TEST 0*03/溫度檢測(cè)命令#define HUM_TEST 0*05/濕度檢測(cè)命令#define REG_READ 0*07/讀存放器#define REG_WRITE 0*06/寫存放器#define FUNCTION_SET 0*01/設(shè)置SHT11的工作精度為8位/濕度 12位

2、溫度/*SHT11端口定義*/sbit SHT11_DATA=P31;sbit SHT11_SCK=P30;sbit P33=P33;sbit P32=P32;sbit P36=P36;sbit P37=P37;uchar flag_tempeture=0; /顯示溫度位置的標(biāo)志uchar flag_humidity=0; /顯示濕度位置的標(biāo)志uchar code str1= 0*10,0*06,0*09,0*08,0*08,0*09,0*06,0*00;/溫度圖標(biāo)uchar code str6_sht11=%RH ; uchar code str4_sht11=humi=;uchar cod

3、e str2_sht11=temp=;uchar code str7_sht11= ;/去除沒不要的顯示/*函數(shù)名稱:Delay()函數(shù)功能:SHT11內(nèi)部延時(shí)*/void Delay() ; ;/*函數(shù)名稱:Delay_Ms()函數(shù)功能:SHT11檢測(cè)等待延時(shí)函數(shù)說明:11ms/55ms/210ms 分別對(duì)應(yīng)8位/12位/14位 測(cè)量結(jié)果對(duì)應(yīng)的形參為N 則延時(shí)Nms*/void Delay_Ms(uint ms) / ms延時(shí)函數(shù) (AT89C51 11.0592MHz) uint i; uchar j; for(i=0;ims;i+) for(j=0;j200;j+); for(j=0;j

4、102;j+); /*函數(shù)功能:SHT11啟動(dòng)時(shí)序*/void SHT11_Start() SHT11_SCK=1; SHT11_DATA=1; Delay(); SHT11_DATA=0; Delay(); SHT11_SCK=0; Delay(); SHT11_SCK=1; Delay(); SHT11_DATA=1;/*函數(shù)名稱：SHT11_Sendbyte(uchar dat)函數(shù)功能: 向SHT11發(fā)送8bite數(shù)據(jù)*/void SHT11_Sendbyte(uchar dat) uchar i; SHT11_SCK=0; Delay(); for(i=0;i8;i+) if(dat

5、&0*80) SHT11_DATA=1; Delay(); else SHT11_DATA=0; Delay(); dat=dat1; SHT11_SCK=1; Delay(); SHT11_SCK=0; /*函數(shù)名稱SHT11_Answer()：函數(shù)功能:檢測(cè)SHT11的響應(yīng)信號(hào)(在第九個(gè)時(shí)鐘周期)*/void SHT11_Answer() SHT11_SCK=1; Delay(); while(SHT11_DATA=1); SHT11_SCK=0; SHT11_DATA=1;/*函數(shù)名稱：SHT11_Test_Finish()函數(shù)功能:檢測(cè)SHT11溫濕度檢測(cè)是否完畢*/void SHT1

6、1_Test_Finish() while(SHT11_DATA=1);/*函數(shù)名稱：SHT11_Receivebyte()函數(shù)功能:從SHT11接收8bite數(shù)據(jù)*/uchar SHT11_Receivebyte() uchar i; uchar dat; SHT11_SCK=0; Delay(); for(i=0;i8;i+) SHT11_SCK=1; Delay(); dat=dat2.47V 當(dāng)位6為1時(shí)說明VDD2.47V即電量缺乏 位0說明當(dāng)前的測(cè)量分辨率 當(dāng)位0為1時(shí)說明測(cè)量精度：8位/濕度 12位溫度 當(dāng)位0為0時(shí)說明測(cè)量精度：12位濕度 14位溫度 默認(rèn)為0*/uchar S

7、HT11_Read_Register(uchar mand) uchar dat; SHT11_Start(); SHT11_Sendbyte(mand); SHT11_Answer(); dat=SHT11_Receivebyte(); SHT11_End(); return(dat);/*函數(shù)名稱:SHT11_Measure(uchar mand,uint time);函數(shù)功能:設(shè)置SHT11檢測(cè)功能,并返回相應(yīng)的檢測(cè)結(jié)果函數(shù)說明:mand形參用于設(shè)定溫度檢測(cè)還是濕度檢測(cè),time形參用于設(shè)定檢測(cè)過程中的等待時(shí)間，以確定檢測(cè)結(jié)果的位數(shù)11ms/55ms/210ms 分別對(duì)應(yīng)8位/12位/1

8、4位 */uint SHT11_Measure(uchar mand,uchar time) uint dat=0; uchar data_high,data_low; SHT11_Start(); SHT11_Sendbyte(mand); SHT11_Answer(); Delay_Ms(time); SHT11_Test_Finish(); data_high=SHT11_Receivebyte(); MCU_Answer(); data_low=SHT11_Receivebyte(); SHT11_End(); dat=(dat|data_high); dat=(dat23) temp

9、eture1=tempeture1+1; if(tempeture155) tempeture1=tempeture1+1; if(P37=1) if(tempeture1=16&tempeture1=400&r=600) P32=1; else P32=0; return(r);#endifDisplay.c文件：#include #include SHT11.h#define uchar unsigned char#define uint unsigned int#define TEM_TEST 0*03/溫度檢測(cè)命令#define HUM_TEST 0*05/濕度檢測(cè)命令#define

10、REG_READ 0*07/讀存放器#define REG_WRITE 0*06/寫存放器#define FUNCTION_SET 0*01/設(shè)置SHT11的工作精度為8位/濕度 12位溫度uchar DispData4 = 0, 1, 2, 3;code uchar DispSegmentP010=0*3f,0*06,0*1b,0*0f,0*26,0*2d,0*3d,0*07,0*3f,0*2f;code uchar DispSegmentP210=0*00,0*00,0*22,0*22,0*22,0*22,0*22,0*00,0*22,0*22; / 0 1 2 3 4 5 6 7 8 9

11、 %code uchar DispCtrl4 = 0*ef, 0*dF, 0*bf ,0*7F;sbit P16=P16;sbit P26=P26;sbit P34=P34;void Temp_delay(unsigned int j) uchar i; for(i=100;i0;i-) for(j;j0;j-); void Show(uchar *Buffer) uchar i; for (i=0; i4; i+) P1 = DispCtrli; P0 = DispSegmentP0*Buffer; P2 = DispSegmentP2*Buffer; if(P16=0) P26=1; Te

12、mp_delay(2); Buffer+; void DispConvert(uchar *DispAddr, uint Temp2Con) DispAddr0 = Temp2Con/1000; DispAddr1 = (Temp2Con - DispAddr0*1000)/100; DispAddr2 = (Temp2Con - DispAddr0*1000 - DispAddr1*100)/10; DispAddr3 = Temp2Con - DispAddr0*1000 - DispAddr1*100 - DispAddr2*10; void main() uint temp; uint dat; uint Hum; /float f; while(1) Show(DispData); SHT11_Write_Register(REG_WRITE,FUNCTION_SET); temp=SHT11_Measure(TEM_TEST,0*37); temp=SHT11_Convert_Tempeture12