SHT10.rar_SHT10仿真_proteus_sht10 1602_温湿度1602仿真_温湿度proteus

/*************端口定义******************** P1.0------SCK (SHT10) P1.1------DATA (SHT10) P0------DB0～DB7 (LCD1602) P2.0------RS (LCD1602) P2.1------RW (LCD1602) P2.2------E (LCD1602) *****************************************/ #include <reg52.h> #include <intrins.h> #include <stdio.h> #include <string.h> #include <absacc.h> #include <math.h> #define uchar unsigned char #define uint unsigned int //1602液晶端口定义 ****** sbit LcdRs= P2^0; sbit LcdRw= P2^1; sbit LcdEn= P2^2; sbit ACC0 = ACC^0; sbit ACC7 = ACC^7; uchar str[7]; //向LCD写入命令或数据************************************************************ #define LCD_COMMAND 0 // Command #define LCD_DATA 1 // Data #define LCD_CLEAR_SCREEN 0x01 // 清屏 #define LCD_HOMING 0x02 // 光标返回原点 //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 //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 //default unsigned char LCD_Wait(void); void LCD_Write(bit style, unsigned char input); /***********1602液晶显示部分子程序****************/ void delay(uint z) { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } void LCD_Write(bit style, unsigned char input) { LcdRs=style; P0=input; delay(5); LcdEn=1; delay(5); LcdEn=0; } void LCD_SetDisplay(unsigned char DisplayMode) { LCD_Write(LCD_COMMAND, 0x08|DisplayMode); } void LCD_SetInput(unsigned char InputMode) { LCD_Write(LCD_COMMAND, 0x04|InputMode); } //初始化LCD************************************************************ void LCD_Initial() { LcdEn=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++; } } void zhuanhuan(float a)//浮点数转换成字符串函数 { memset(str,0,sizeof(str)); sprintf (str,"%f", a); } void welcome() { LCD_Initial(); GotoXY(0,0); Print(" Welcome! "); GotoXY(0,1); Print(" Code of sht10 "); delay(200); } /*-------------------------------------- ;模块名称:delay_n10us(); ;功 能:延时函数，延时约n个10us 较精确的延时函数,"_nop_()"延时1us@12M晶振 ;-------------------------------------*/ void delay_n10us(uint n) //延时n个10us@12M晶振 { uint i; for(i=n;i>0;i--) { _nop_();_nop_();_nop_(); _nop_();_nop_();_nop_(); } } //*********************第一部分LCD1602设置 END**************************************** //*********************第二部分DHT90设置 START**************************************** sbit SCK = P1^0; //定义通讯时钟端口 sbit DATA = P1^1; //定义通讯数据端口 typedef union { unsigned int i; //定义了两个共用体 float f; } value; enum {TEMP,HUMI}; //TEMP=0,HUMI=1 #define noACK 0 //用于判断是否结束通讯 #define ACK 1 //结束数据传输 //adr command r/w #define STATUS_REG_W 0x06 //000 0011 0 #define STATUS_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 /****************定义函数****************/ void s_transstart(void); //启动传输函数 void s_connectionreset(void); //连接复位函数 char s_write_byte(unsigned char value);//DHT90写函数 char s_read_byte(unsigned char ack); //DHT90读函数 char s_measure(unsigned char *p_value, unsigned char *p_checksum, unsigned char mode);//测量温湿度函数 void calc_dht90(float *p_humidity ,float *p_temperature);//温湿度补偿 /*-------------------------------------- ;模块名称:s_transstart(); ;功 能:启动传输函数 ;-------------------------------------*/ void s_transstart(void) // generates a transmission start // _____ ________ // DATA: |_______| // ___ ___ // SCK : ___| |___| |______ { DATA=1; SCK=0; //Initial state _nop_(); SCK=1; _nop_(); DATA=0; _nop_(); SCK=0; _nop_();_nop_();_nop_(); SCK=1; _nop_(); DATA=1; _nop_(); SCK=0; } /*-------------------------------------- ;模块名称:s_connectionreset(); ;功 能:连接复位函数 ;-------------------------------------*/ void s_connectionreset(void) // communication reset: DATA-line=1 and at least 9 SCK cycles followed by transstart // _____________________________________________________ ________ // DATA: |_______| // _ _ _ _ _ _ _ _ _ ___ ___ // SCK : __| |__| |__| |__| |__| |__| |__| |__| |__| |______| |___| |______ { unsigned char i; DATA=1; SCK=0; //Initial state for(i=0;i<9;i++) //9 SCK cycles { SCK=1; SCK=0; } s_transstart(); //transmission start } /*-------------------------------------- ;模块名称:s_write_byte(); ;功 能:SHT10写函数 ;-------------------------------------*/ char s_write_byte(unsigned char value) //---------------------------------------------------------------------------------- // writes a byte on the Sensibus and checks the acknowledge { unsigned char i,error=0; for (i=0x80;i>0;i/=2) //shift bit for masking { if (i & value) DATA=1; //masking value with i , write to SENSI-BUS else DATA=0; SCK=1; //clk for SENSI-BUS _nop_();_nop_();_nop_(); //pulswith approx. 3 us SCK=0; } DATA=1; //release DATA-line SCK=1; //clk #9 for ack error=DATA; //check ack (DATA will be pulled down by DHT90),DATA在第9个上升沿将被DHT90自动下拉为低电平。 _nop_();_nop_();_nop_(); SCK=0; DATA=1; //release DATA-line return error; //error=1 in case of no acknowledge //返回：0成功，1失败 } /*-------------------------------------- ;模块名称:s_read_byte(); ;功 能:SHT10读函数 ;-------------------------------------*/ char s_read_byte(unsigned char ack) // reads a byte form the Sensibus and gives an acknowledge in case of "ack=1" { unsigned char i,val=0; DATA=1; //release DATA-line for (i=0x80;i>0;i/=2) //shift bit for masking { SCK=1; //clk for SENSI-BUS if (DATA) val=(val | i); //read bit _nop_();_nop_();_nop_(); //pulswith approx. 3 us SCK=0; } if(ack==1)DATA=0; //in case of "ack==1" pull down DATA-Line else DATA=1; //如果是校验(ack==0)，读取完后结束通讯 _nop_();_nop_();_nop_(); //pulsw