SHT11温湿度传感器与1602应用的程序代码

#ifndef __TOU_H__#define __TOU_H__#include<reg52.h>#include <intrins.h>//#include <math.h> //Keil library#define uchar unsigned charenum {TEMP,HUMI};sbit DA TA = P1^1;sbit SCK = P1^0;sbit RS = P2^0;sbit RW = P2^1;sbit E = P2^2;sfr DBPort = 0x80; //P0=0x80,P1=0x90,P2=0xA0,P3=0xB0.数据端口/******** DS1602函数声明********/void LCD_Initial();void GotoXY(unsigned char x, unsigned char y);void Print(unsigned char *str);void LCD_Write(bit style, unsigned char input);/******** SHT10函数声明********/void s_connectionreset(void);char s_measure(unsigned char *p_value, unsigned char *p_checksum, unsigned char mode);void calc_sth10(float *p_humidity ,float *p_temperature);//float calc_dewpoint(float h,float t);#endif/****************************************************************************************************** *****************************************************///SHT10程序（SHT10.c）：//#include<tou.h>#define noACK 0 //继续传输数据，用于判断是否结束通讯#define ACK 1 //结束数据传输；//地址命令读/写#define STA TUS_REG_W 0x06 //000 0011 0#define STA TUS_REG_R 0x07 //000 0011 1#define MEASURE_TEMP 0x03 //000 0001 1#define MEASURE_HUMI 0x05 //000 0010 1#define RESET 0x1e //000 1111 0//写字节程序char s_write_byte(unsigned char value){unsigned char i,error=0;for (i=0x80;i>0;i>>=1) //高位为1，循环右移{if (i&value) DATA=1; //和要发送的数相与，结果为发送的位else DATA=0;SCK=1;_nop_();_nop_();_nop_(); //延时3usSCK=0;}DA TA=1; //释放数据线SCK=1;error=DATA; //检查应答信号，确认通讯正常_nop_();_nop_();_nop_();SCK=0;DA TA=1;return error; //error=1 通讯错误}//读字节程序char s_read_byte(unsigned char ack)//----------------------------------------------------------------------------------{unsigned char i,val=0;DA TA=1; //释放数据线for(i=0x80;i>0;i>>=1) //高位为1，循环右移{SCK=1;if(DATA) val=(val|i); //读一位数据线的值SCK=0;}DA TA=!ack; //如果是校验，读取完后结束通讯；SCK=1;_nop_();_nop_();_nop_(); //延时3usSCK=0;_nop_();_nop_();_nop_();DA TA=1; //释放数据线return val;}//启动传输void s_transstart(void)// generates a transmission start// _____ ________// DATA: |_______|// ___ ___DA TA=1; SCK=0; //准备_nop_();SCK=1;_nop_();DA TA=0;_nop_();SCK=0;_nop_();_nop_();_nop_();SCK=1;_nop_();DA TA=1;_nop_();SCK=0;}//连接复位void s_connectionreset(void)// communication reset: DATA-line=1 and at least 9 SCK cycles followed by transstart// _____________________________________________________ ________// DATA: |_______|// _ _ _ _ _ _ _ _ _ ___ ___// SCK : __| |__| |__| |__| |__| |__| |__| |__| |__| |______| |___| |______{unsigned char i;DA TA=1; SCK=0; //准备for(i=0;i<9;i++) //DATA保持高，SCK时钟触发9次，发送启动传输，通迅即复位{SCK=1;SCK=0;}s_transstart(); //启动传输}//软复位程序char s_softreset(void)// resets the sensor by a softreset{unsigned char error=0;s_connectionreset(); //启动连接复位error+=s_write_byte(RESET); //发送复位命令return error; //error=1 通讯错误}/*读状态寄存器char s_read_statusreg(unsigned char *p_value, unsigned char *p_checksum)// reads the status register with checksum (8-bit){unsigned char error=0;s_transstart(); //transmission starterror=s_write_byte(STATUS_REG_R); //send command to sensor*p_value=s_read_byte(ACK); //read status register (8-bit)*p_checksum=s_read_byte(noACK); //read checksum (8-bit)return error; //error=1 in case of no response form the sensor}//写状态寄存器char s_write_statusreg(unsigned char *p_value)// writes the status register with checksum (8-bit){unsigned char error=0;s_transstart(); //transmission starterror+=s_write_byte(STATUS_REG_W);//send command to sensorerror+=s_write_byte(*p_value); //send value of status registerreturn error; //error>=1 in case of no response form the sensor} *///温湿度测量char s_measure(unsigned char *p_value, unsigned char *p_checksum, unsigned char mode)// 进行温度或者湿度转换，由参数mode决定转换内容；{// enum {TEMP,HUMI}; //已经在头文件中定义unsigned error=0;unsigned int i;s_transstart(); //启动传输switch(mode) //选择发送命令{case TEMP : error+=s_write_byte(MEASURE_TEMP); break; //测量温度case HUMI : error+=s_write_byte(MEASURE_HUMI); break; //测量湿度default : break;}for (i=0;i<65535;i++) if(DATA==0) break; //等待测量结束if(DATA) error+=1; // 如果长时间数据线没有拉低，说明测量错误*(p_value) =s_read_byte(ACK); //读第一个字节，高字节(MSB)*(p_value+1)=s_read_byte(ACK); //读第二个字节，低字节(LSB)*p_checksum =s_read_byte(noACK); //read CRC校验码return error; // error=1 通讯错误}//温湿度值标度变换及温度补偿void calc_sth10(float *p_humidity ,float *p_temperature){const float C1=-4.0; // 12位湿度精度修正公式const float C2=+0.0405; // 12位湿度精度修正公式const float T1=+0.01; // 14位温度精度5V条件修正公式const float T2=+0.00008; // 14位温度精度5V条件修正公式float rh=*p_humidity; // rh: 12位湿度float t=*p_temperature; // t: 14位温度float rh_lin; // rh_lin: 湿度linear值float rh_true; // rh_true: 湿度ture值float t_C; // t_C : 温度℃t_C=t*0.01 - 40; //补偿温度rh_lin=C3*rh*rh + C2*rh + C1; //相对湿度非线性补偿rh_true=(t_C-25)*(T1+T2*rh)+rh_lin; //相对湿度对于温度依赖性补偿if(rh_true>100)rh_true=100; //湿度最大修正if(rh_true<0.1)rh_true=0.1; //湿度最小修正*p_temperature=t_C; //返回温度结果*p_humidity=rh_true; //返回湿度结果}//从相对温度和湿度计算露点/*float calc_dewpoint(float h,float t){float logEx,dew_point;logEx=0.66077+7.5*t/(237.3+t)+(log10(h)-2);dew_point = (logEx - 0.66077)*237.3/(0.66077+7.5-logEx);return dew_point;} *//****************************************************************************************************** *****************************************************///DS1602程序（1602.c）：//#include<tou.h>//内部等待函数**************************************************************unsigned char LCD_Wait(void){RS=0;RW=1; _nop_();E=1; _nop_();E=0;return DBPort;}//向LCD写入命令或数据********************************************************#define LCD_COMMAND 0 // Command#define LCD_DA TA 1 // Data#define LCD_CLEAR_SCREEN 0x01 // 清屏#define LCD_HOMING 0x02 // 光标返回原点void LCD_Write(bit style, unsigned char input)E=0;RS=style;RW=0; _nop_();DBPort=input; _nop_();//注意顺序E=1; _nop_();//注意顺序E=0; _nop_();LCD_Wait();}//设置显示模式************************************************************ #define LCD_SHOW 0x04 //显示开#define LCD_HIDE 0x00 //显示关#define LCD_CURSOR 0x02 //显示光标#define LCD_NO_CURSOR 0x00 //无光标#define LCD_FLASH 0x01 //光标闪动#define LCD_NO_FLASH 0x00 //光标不闪动void LCD_SetDisplay(unsigned char DisplayMode){LCD_Write(LCD_COMMAND, 0x08|DisplayMode);}//设置输入模式************************************************************ #define LCD_AC_UP 0x02#define LCD_AC_DOWN 0x00 // default#define LCD_MOVE 0x01 // 画面可平移#define LCD_NO_MOVE 0x00 //defaultvoid LCD_SetInput(unsigned char InputMode){LCD_Write(LCD_COMMAND, 0x04|InputMode);}//初始化LCD************************************************************ void LCD_Initial(){E=0;LCD_Write(LCD_COMMAND,0x38); //8位数据端口,2行显示,5*7点阵LCD_Write(LCD_COMMAND,0x38);LCD_SetDisplay(LCD_SHOW|LCD_NO_CURSOR); //开启显示, 无光标LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN); //清屏LCD_SetInput(LCD_AC_UP|LCD_NO_MOVE); //AC递增, 画面不动}//液晶字符输入的位置************************void GotoXY(unsigned char x, unsigned char y)if(y==0)LCD_Write(LCD_COMMAND,0x80|x);if(y==1)LCD_Write(LCD_COMMAND,0x80|(x-0x40));}//将字符输出到液晶显示void Print(unsigned char *str){while(*str!='\0'){LCD_Write(LCD_DATA,*str);str++;}}/****************************************************************************************************** *****************************************************///主函数（main.c）：//#include<tou.h>typedef union //定义共用同类型{unsigned int i;float f;} value;//延时函数void delay(int z) //z为毫秒数{int x,y;for(x=z;x>0;x--)for(y=125;y>0;y--);}void main(){unsigned int temp,humi;value humi_val,temp_val; //定义两个共同体，一个用于湿度，一个用于温度// float dew_point; //用于记录露点值unsigned char error; //用于检验是否出现错误unsigned char checksum; //CRCuchar wendu[6]; //用于记录温度uchar shidu[6]; //用于记录湿度LCD_Initial(); //初始化液晶Print("TEMP: %C"); //5格空格GotoXY(0,1); //选择湿度显示位置Print("HUMI: %RH"); //5格空格s_connectionreset(); //启动连接复位while(1){error=0; //初始化error=0，即没有错误error+=s_measure((unsigned char*)&temp_val.i,&checksum,TEMP); //温度测量error+=s_measure((unsigned char*)&humi_val.i,&checksum,HUMI); //湿度测量if(error!=0) s_connectionreset(); ////如果发生错误，系统复位else{humi_val.f=(float)humi_val.i; //转换为浮点数temp_val.f=(float)temp_val.i; //转换为浮点数calc_sth10(&humi_val.f,&temp_val.f); //修正相对湿度及温度// dew_point=calc_dewpoint(humi_val.f,temp_val.f); //计算e dew_pointtemp=temp_val.f*10;humi=humi_val.f*10;GotoXY(5,0); //设置温度显示位置wendu[0]=temp/1000+'0'; //温度百位wendu[1]=temp%1000/100+'0'; //温度十位wendu[2]=temp%100/10+'0'; //温度个位wendu[3]=0x2E; //小数点wendu[4]=temp%10+'0'; //温度小数点后第一位Print(wendu); //输出温度GotoXY(5,1); //设置湿度显示位置shidu[0]=humi/1000+'0'; //湿度百位shidu[1]=humi%1000/100+'0'; //湿度十位shidu[2]=humi%100/10+'0'; //湿度个位shidu[3]=0x2E; //小数点shidu[4]=humi%10+'0'; //湿度小数点后第一位Print(shidu); //输出湿度}delay(800); //等待足够长的时间，以现行下一次转换}}。