当前位置：文档之家 › 原创 C51 温湿度传感器DHT11驱动 LCD1602显示程序 硬件通过 含电路图和实际测试效果图

原创 C51 温湿度传感器DHT11驱动 LCD1602显示程序 硬件通过 含电路图和实际测试效果图

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DHT11.c文件#include<reg52.h>#include<Time_Delay.h>//the main only needs to call getDHT11(),then the temperature and huminity was geted in F16T,F16RH as floatsbit bit11=P2^0;unsigned char U8T_data_H,U8T_data_L,U8RH_data_H,U8RH_data_L,U8checkdata;float F16T,F16RH; //用于最终读取的温湿度数据// read 8 bits onicechar COM(void){char i,U8temp,U8comdata;for(i=0;i<8;i++){while(!bit11); //表示读取的高电位延时大于20多us 则读取的是1 否则读取的是0Delay_us(35); //通过U8FLAG 可判断bit11 显示数据的脉长U8temp=0;if(bit11)U8temp=1;while(bit11);U8comdata<<=1;U8comdata|=U8temp; //0}//rofreturn U8comdata;}//--------------------------------//-----温湿度读取子程序------------//--------------------------------//----以下变量均为全局变量--------//----温度高8位== U8T_data_H------//----温度低8位== U8T_data_L------//----湿度高8位== U8RH_data_H-----//----湿度低8位== U8RH_data_L-----//----校验8位== U8checkdata-----//----调用相关子程序如下----------//---- Delay();, Delay_10us();,COM();//--------------------------------void getDHT11(void){//主机拉低18msGO1: bit11=0;Delay_ms(20);bit11=1;//总线由上拉电阻拉高主机延时20usDelay_us(60);//主机设为输入判断从机响应信号// bit11=1;//判断从机是否有低电平响应信号如不响应则跳出，响应则向下运行if(!bit11) //T !{while(!bit11); //wait DHT goto highwhile(bit11);//数据接收状态U8RH_data_H=COM();U8RH_data_L=COM();U8T_data_H=COM();U8T_data_L=COM();U8checkdata=COM();bit11=1;//数据校验if((U8T_data_H+U8T_data_L+U8RH_data_H+U8RH_data_L)!=U8checkdata) //if check wrong,read againgoto GO1;}//fiF16T=U8T_data_H+(float)U8T_data_L/256; //change integer to floatF16RH=U8RH_data_H+(float)U8RH_data_L/256;}LCD1602文件#include<reg52.h>#include <stdio.h>#include <INTRINS.H>#include <Lcd_1602.h>#include <Time_Delay.h>#define LCD_DATA P0 //LCD1602 data transfer define#define uint unsigned int#define uchar unsigned char/*只由主函数调用的有Init_Lcd()LCD_write_str(uchar X,uchar Y,uchar *s)LCD_value(unsigned char x,unsigned char y,float f)*/sbit LCD_RS = P2^5; //1602 control definesbit RW = P2^6;sbit LCD_E = P2^7;/*************************************************************************** #define LCD_SCREEN_ON 0x0C //显示开#define LCD_SCREEN_OFF 0x08 //显示关#define LCD_CURSOR_ON 0x0A //显示光标#define LCD_CURSOR_OFF 0x0c //无光标#define LCD_C_FLASH_ON 0x0f //有光标，光标闪动#define LCD_C_FLASH_OFF 0x0e //有光标，光标不闪动//进入模式设置指令#define LCD_AC_UP 0x06 //新数据后光标右移#define LCD_AC_DOWN 0x04 //新数据后光标左移#define LCD_S_MOVE_ON 0x05 // 画面可平移#define LCD_S_MOVE_OFF 0x04 //画面不可平移//设定显示屏或光标移动方向指令#define LCD_C_LEFT 0x10 //光标左移1格，且AC值减1#define LCD_C_RIGHT 0x11 //光标右移1格，且AC值加1#define LCD_CHAR_LEFT 0x18 //显示器上字符全部左移一格，但光标不动#define LCD_CHAR_RIGHT 0x1C //显示器上字符全部右移一格，但光标不动***************************************************************************/ //注有主函数调用的函数都已作说明其他函数一般不由主函数调用/**************************************************************************** * 名称：Init_Lcd() 主函数调用* 功能：Lcd初始化* 入口参数：无* 出口参数：无* 范例: 在主函数中直接调用****************************************************************************/void Init_Lcd() //LCD初始化{LCD_write_char(0x38,0);Delay_ms(1);LCD_write_char(0x38,0);Delay_ms(1);LCD_write_char(0x38,0);Delay_ms(1);LCD_write_char(0x0c,0);Delay_ms(1);LCD_write_char(0x06,0);Delay_ms(1);LCD_write_char(0x0c,0);Delay_ms(1);//}/**************************************************************************** * 名称：LCD_write_str(uchar X,uchar Y,uchar *s)主函数调用* 功能：在指定地址写一个字符串eg:Y=0,1,2,3,4,5,6,7,8,9,10...15。

X=0,1。

* 入口参数：X:横坐标Y：纵坐标*s：字符串首地址* 出口参数：无* 范例: LCD_write_str(1,1,uchar *s)****************************************************************************/ void LCD_write_str(unsigned char X,unsigned char Y,unsigned char *s){LCD_write_char(0,' ');LCD_set_xy( X, Y ); //写地址while (*s) // 写显示字符{LCD_write_char( 0, *s );s ++;}}/**************************************************************************** * 名称：LCD_set_xy( uchar x, uchar y ) the optic sign flash?* 功能：指定一个地址* 入口参数：X:横坐标Y：纵坐标* 出口参数：无* 范例: LCD_set_xy(5,1)*************CD_set_xy********************************************************* ******/void LCD_set_xy( uchar x, uchar y ) //写地址函数{unsigned char address;if (y == 0) address = 0x80 + x;elseaddress = 0xc0 + x;LCD_write_char( address, 0 );}/**************************************************************************** * 名称：LCD_en_write(void)* 功能：液晶使能* 入口参数：无* 出口参数：无* 范例: 直接调用*************CD_set_xy********************************************************* ******/void LCD_en_write(void) //液晶使能{_nop_();LCD_E=1;//EN=1_nop_();LCD_E=0;//EN=0}//------------------------------------------------/**************************************************************************** * 名称：LCD_write_char(uchar cd,uchar ab）* 功能：写指令或数据当写ab时应使cd=0 当cd不为0 则写cd 且ab的赋值无效* 入口参数：cd:指令内容ab:数据内容指令常量已在上面定义但一般不用* 出口参数：无* 范例: LCD_write_char( 0, ‘f’）*************CD_set_xy********************************************************* ******/void LCD_write_char(uchar cd,uchar ab) // 写数据{Delay_us(20);if(cd==0){LCD_RS=1; //RS=1,写显示内容LCD_byte(ab);}else{LCD_RS=0; //RS=0，写命令LCD_byte(cd);}}/**************************************************************************** * 名称：LCD_byte(abc);* 功能：写一个字符到or called one byte to LCD中* 入口参数：* 出口参数：无*************CD_set_xy********************************************************* ******/void LCD_byte(unsigned char abc){RW = 0;LCD_E = 0;LCD_DATA = abc;LCD_en_write();}//在液晶中显示浮点数函数LCD_value(unsigned char x,unsigned char y,float f)unsigned char str[15]; //不能定义为char* str，数组长度一定要大于浮点数的总位数sprintf(str,"%.1f",f); //1表示小数位数小数太多自动四舍五入LCD_write_str( x, y, str);return 0;}主函数文件#include <reg52.h>#include <intrins.h>#include <Lcd_1602.h>#include <Time_Delay.h>#include"DHT11.h"extern float F16T,F16RH; //全局变量声明void main (){Init_Lcd();LCD_write_str(0,1,"abc"); //液晶预显示测试LCD_value(0,0,34.345);Delay_ms(2000);Init_Lcd();while(1){getDHT11();LCD_write_str(0,0,"T=");LCD_value(3,0,F16T); LCD_write_str(8,0,"\"C"); //字符" 应用转义格式LCD_write_str(0,1,"RH=");LCD_value(4,1,F16RH); LCD_write_str(9,1,"%");Delay_ms(500);}}延时函数文件//以下为延时函数this is fit to old C51 12MHz, 12 devide freqencyvoid Delay_ms(unsigned int n)//n毫秒延时unsigned char j;while(n--){for(j=0;j<125;j++);}}void Delay_us(unsigned char n) //N us延时函数精度±4us {n=n/2;while(--n);}电路图实际效果。

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51单片机驱动LCD1602程序设计(C语言)

51单片机驱动LCD1602程序设计(C语言)

51 单片机驱动 LCD1602 程序设计（C 语言）
字符液晶绝大多数是基于 HD44780 液晶芯片的，控制原理是完全相同的，因此 HD44780 写 的控制程序可以很方便地应用于市面上大部分的字符型液晶。字符型 LCD 通常有 14 条引脚线或 16 条引脚线的 LCD，多出来的 2 条线是背光电源线 VCC(15 脚)和地线 GND(16 脚)，其控制原理 与 14 脚的 LCD 完全一样，定义如下表所示：
for(i=0;i<count;i++) {
if (0 == y) x |= 0x80; //当要显示第一行时地址码+0x80; else x |= 0xC0; //在第二行显示是地址码+0xC0; Write_com(x); //发送地址码 Write_dat(*p); //发送要显示的字符编码 x++; p++; }
01110
○■■■○
10001
■○○○■
10001
■○○○■
10001
■○○○■
11111
■■■■■
10001
■○○○■
10001
■○○○■
上图左边的数据就是字模数据，右边就是将左边数据用“○”代表 0，用“■”代表 1。看出是个“A”
字了吗？在文本文件中“A”字的代码是 41H，PC 收到 41H 的代码后就去字模文件中将代表 A 字的
字符型 LCD 的引脚定义
HD44780 内置了 DDRAM、CGROM 和 CGRAM。DDRAM 就是显示数据 RAM，用来寄存 待显示的字符代码。共 80 个字节，其地址和屏幕的对应关系如下表：
也就是说想要在 LCD1602 屏幕的第一行第一列显示一个"A"字,就要向 DDRAM 的 00H 地址写 入“A”字的代码就行了。但具体的写入是要按 LCD 模块的指令格式来进行的。在 1602 中我们用前 16 个就行了。第二行也一样用前 16 个地址。对应如下：
Arduino从DHT11读取温湿度数据并显示在1602LCD

Arduino从DHT11读取温湿度数据并显示在1602LCD

Arduino从DHT11读取温湿度数据并显⽰在1602LCD硬件清单Arduino NANO1602LCD + PCF8574T模块YL-47 DHT11模块连线1. 连接LCD: PCF8574T模块4pin(Gnd, Vcc, SDA i2c数据, SCL i2c时钟) 连接⾄Arduino接⼝ Gnd -> Gnd, Vcc -> Vcc, SDA -> A4, SDL -> A52. 连接YL-47 DHT11: Gnd -> Gnd, Vcc -> Vcc, Data-> D4Library除了1602需要的库以外, 需要安装两个⾃带的库: DHT Sensor Library by Adafruit, Adafruit Unified Sensor测试代码#include <Wire.h>#include <LiquidCrystal_I2C.h>#include <DHT.h>#define DHTPIN 4#define DHTTYPE DHT11// I2C地址, ⼀般为0x3F, 0x20或0x27LiquidCrystal_I2C lcd(0x27,16,2);// 初始化DHTDHT dht(DHTPIN, DHTTYPE);void setup() {lcd.init();lcd.backlight(); // 打开背光Serial.begin(9600);dht.begin();lcd.setCursor(0,0); // line 0, pos 0lcd.print("Good Day!");lcd.setCursor(0,1); // line 1, pos 0lcd.print("H: % T:");delay(1000);}void loop() {// Reading temperature or humidity takes about 250 milliseconds!// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)float h = dht.readHumidity();// Read temperature as Celsius (the default)float t = dht.readTemperature();// Read temperature as Fahrenheit (isFahrenheit = true)float f = dht.readTemperature(true);// Check if any reads failed and exit early (to try again).if (isnan(h) || isnan(t) || isnan(f)) {Serial.println("Failed to read from DHT sensor!");return;}// Compute heat index in Fahrenheit (the default)float hif = puteHeatIndex(f, h);// Compute heat index in Celsius (isFahreheit = false)float hic = puteHeatIndex(t, h, false);Serial.print("Humidity: ");Serial.print(h);Serial.print(" %\t");Serial.print("Temperature: ");Serial.print(t);Serial.print(" *C ");Serial.print(f);Serial.print(" *F\t");Serial.print("Heat index: ");Serial.print(hic);Serial.print(" *C ");Serial.print(hif);Serial.println(" *F");lcd.setCursor(2,1); // line 1, pos 0lcd.print(h);lcd.setCursor(11,1); // line 1, pos 0lcd.print(t);delay(1000);}代码说明1. DHT11启动到读取数据需要等待1~2秒2. 温湿度的精度都为1, 没有⼩数部分3. DHT库⾥⾯带了计算热指数的⽅法 computeHeatIndex(), ⽤于⽣成综合温湿度计算得到的热指数值改进拼接字符串改进后的代码, 注意: arduino⾥的sprintf只能格式化整数, 不能格式化浮点#include <Wire.h>#include <LiquidCrystal_I2C.h>#include <DHT.h>#include <DS3231.h>#define DHTPIN 4#define DHTTYPE DHT11// I2C地址, ⼀般为0x3F, 0x20或0x27LiquidCrystal_I2C lcd(0x27,16,2);DHT dht(DHTPIN, DHTTYPE);DS3231 Clock;bool century=false;bool h12;bool PM;void setup() {lcd.init();//lcd.backlight(); // 打开背光Serial.begin(9600);dht.begin();lcd.setCursor(0,0); // line 0, pos 0lcd.print("Good Day Jessie~~");lcd.setCursor(0,1); // line 1, pos 0lcd.print("H: % T: T:");delay(1000);}void loop() {char str[17];sprintf(str,"%02d-%02d %02d:%02d:%02d ",Clock.getMonth(century),Clock.getDate(),Clock.getHour(h12, PM),Clock.getMinute(),Clock.getSecond());lcd.setCursor(0,0); // line 0, pos 0lcd.print(str);// Reading temperature or humidity takes about 250 milliseconds!// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)float h = dht.readHumidity();// Read temperature as Celsius (the default)float t = dht.readTemperature();// Read temperature as Fahrenheit (isFahrenheit = true)float f = dht.readTemperature(true);// Check if any reads failed and exit early (to try again).if (isnan(h) || isnan(t) || isnan(f)) {Serial.println("Failed to read from DHT sensor!");return;}// Compute heat index in Fahrenheit (the default)float hif = puteHeatIndex(f, h);// Compute heat index in Celsius (isFahreheit = false)float hic = puteHeatIndex(t, h, false);Serial.print("Humidity: ");Serial.print(h);Serial.print(" %\t");Serial.print("Temperature: ");Serial.print(t);Serial.print(" *C ");Serial.print(f);Serial.print(" *F\t");Serial.print("Heat index: ");Serial.print(hic);Serial.print(" *C ");Serial.print(hif);Serial.println(" *F");lcd.setCursor(2,1); // line 1, pos 0lcd.print((int)h);lcd.setCursor(8,1); // line 1, pos 0lcd.print((int)t);lcd.setCursor(13,1);lcd.print((int)(Clock.getTemperature()*10)); delay(1000);}。

DHT11温湿度传感器驱动程序

DHT11温湿度传感器驱动程序

/* 本程序适用于DHT11温湿度传感器由于DHT11使用拉高总线的不同时常来代替0和1 0 28US 1 70us 同时数据送入1602a显示*/#include<reg52.h>#include<intrins.h>#include<math.h>#define Data P0//数据端口sbit RS = P2^4; //Pin4sbit RW = P2^5; //Pin5sbit E = P2^6; //Pin6sbit dat=P1^2;unsigned int shidu_h=0,shidu_l=0,wendu_h=0,wendu_l=0,i,xiaoyan=0;//定义湿度温度变量unsigned char code tab[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39};//定义1602a显示0-9unsigned int a[16]={0} ;void delayus(unsigned char i) //延时2us{while(--i);}void delayms(unsigned char j) //延时1ms{while(--j){delayus(125);delayus(125);delayus(125);delayus(125);}}/*************************************************** ***************//* 写入命令函数1602 *//*************************************************** ***************/void WriteCommand(unsigned int c){delayms(10);//操作前短暂延时，保证信号稳定代替状态监测E=0;RS=0;_nop_();E=1;Data=c;E=0;}/*************************************************** ***************//* 写入数据函数*//*************************************************** ***************/void WriteData(unsigned char c){delayms(10);;//操作前短暂延时，保证信号稳定E=0;RS=1;RW=0;_nop_();E=1;Data=c;E=0;}/*************************************************** ***************//* 写入字节函数*//*************************************************** ***************/void ShowChar(unsigned char pos,unsigned int c){unsigned char p;if (pos>=0x10)p=pos+0xb0; //是第二行则命令代码高4位为0xc p低两位表示位置显示代码只用DDRAM前16位elsep=pos+0x80; //是第一行则命令代码高4位为0x8 p低两位表示位置显示代码只用DDRAM前16位WriteCommand (p);//写命令写入数据指针确定行中哪一位显示WriteData (c); //写数据}/******************************************************************//* 写入字符串函数*//*************************************************** ***************/void ShowString (unsigned char line,unsigned int *ptr){unsigned char l,i;//l表示行中某一位显示l=line<<4; //L为0x01时左移四位为了与b0H相加变为0xc for (i=0;i<16;i++)ShowChar (l++,*(ptr+i));//循环显示16个字符}/*************************************************** ***************//* 初始化函数*//*************************************************** ***************/void InitLcd(){WriteCommand(0x38); //display modeWriteCommand(0x38); //display modeWriteCommand(0x38); //display modeWriteCommand(0x06); //显示光标移动位置WriteCommand(0x0c); //显示开及光标设置WriteCommand(0x01); //显示清屏}void main(void){InitLcd(); //初始化LCDdelayms(30);while(1){dat=0;delayms(18);//延时18ms拉低主线dat=1;//主机拉高总线/*delayus(20);*/_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_no p_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_no p_();_nop_();_nop_();_nop_();while(!dat);//判断从机是否相应完毕相应完毕会拉高总线while(dat);//等待从机拉高总线准备开始传送数据while(!dat);//判断是否开始1bit 开始会拉高总线for(i=0;i<8;i++){shidu_h<<=1; //右移1位delayus(14); //延时30us判断是否为1if(dat){shidu_h++;}while(dat);//为一则等待从机拉低总线为零直接跳出while(!dat);//判断是否开始1bit 开始会拉高总线}for(i=0;i<8;i++){delayus(14);shidu_l<<=1;if(dat){shidu_l++;}while(dat);}for(i=0;i<8;i++) {delayus(14); wendu_h<<=1; if(dat){wendu_h++; }while(dat); while(!dat);}for(i=0;i<8;i++) {delayus(14); wendu_l<<=1; if(dat){wendu_l++;}while(dat);}for(i=0;i<8;i++){delayus(14);xiaoyan<<=1;if(dat){xiaoyan++;}while(dat);while(!dat);}{a[0]=tab[(wendu_h)/10]; a[1]=tab[(wendu_h)%10]; a[2]=tab[(shidu_h)/10];a[3]=tab[(shidu_h)%10]; a[4]=tab[xiaoyan/10];a[5]=tab[xiaoyan%10]; ShowString(0,a);}delayms(100);shidu_h=0;wendu_h=0;shidu_l=0;wendu_l=0;xiaoyan=0;}}。

STC15单片机DHT11在LCD1602上显示程序

STC15单片机DHT11在LCD1602上显示程序

敬告：没有51单片机基础的人请慎重下载高质量实用性51单片机STC15W系列程序（4），STC8A系列可参考STC15单片机DHT11在LCD1602上显示程序注：在本节关于DHT11的程序有两种/*****************************************/版本一：/****************************************//****************************************/main函数程序：#include "Library.h"unsigned char strbuf[4];//void ValToStr(unsigned char *str,unsigned char *source,unsigned char len);unsigned char tmrflag = 0;unsigned char DHTbuf[5];void Delay1000ms() //@11.0592MHz{unsigned char i, j, k;_nop_();_nop_();i = 43;j = 6;k = 203;do{do{while (--k);} while (--j);} while (--i);}void main(){unsigned char DHTstr[8];P3M1 &= 0xBF; P3M0 &= 0xBF; P2M1 &= 0xE5; P2M0 &= 0xE5;P0M1 = 0x00; P0M0 = 0x00;LCD1602_init();LCD1602_wBytes(2,0,".",1);LCD1602_wBytes(8,0,"humi",4);LCD1602_wBytes(2,1,".",1);LCD1602_wBytes(8,1,"temp",4);while(1){DHT11_start(DHTbuf);// ValToStr(DHTstr,DHTbuf,sizeof(DHTbuf)-1);DHTstr[0] = DHTbuf[0]/10 + '0';DHTstr[1] = DHTbuf[0]%10 + '0';DHTstr[2] = DHTbuf[1]/10 + '0';DHTstr[3] = DHTbuf[1]%10 + '0';DHTstr[4] = DHTbuf[2]/10 + '0';DHTstr[5] = DHTbuf[2]%10 + '0';DHTstr[6] = DHTbuf[3]/10 + '0';DHTstr[7] = DHTbuf[3]%10 + '0';LCD1602_wBytes(0,0,DHTstr,2);LCD1602_wBytes(3,0,DHTstr+2,2);LCD1602_wBytes(0,1,DHTstr+4,2);LCD1602_wBytes(3,1,DHTstr+6,2);Delay1000ms();Delay1000ms();}}//void ValToStr(unsigned char *str,unsigned char *source,unsigned char len)//{// unsigned char i;// while(len>0)// {// str[i*2] = source[i]/10+'0';// str[1+i*2] = source[i]%10+'0';// i++;// len--;// }//}/*********************************************/DHT11程序：/******************************8bit humidity integer data + 8bit humidity decimal data 8bit temperature integer data + 8bit temperature decimal data8bit check sum,high bit ahead*******************************/#include "Library.h"unsigned char u8flag;unsigned char check_buf[5];unsigned char tmp;void delay_1s() //@11.0592MHz{unsigned char i, j, k;_nop_();_nop_();j = 6;k = 203;do{do{while (--k);} while (--j);} while (--i);}void Delay10us() //@11.0592MHz {unsigned char i;_nop_();i = 25;while (--i);}void Delay20ms() //@11.0592MHz {unsigned char i, j, k;_nop_();_nop_();i = 1;k = 35;do{do{while (--k);} while (--j);} while (--i);}unsigned char Rec_8bit(){unsigned char i;unsigned char ret_8bit;unsigned char tmp;for(i=0;i<8;i++){while(!DHT11port);Delay10us();Delay10us();Delay10us();tmp = 0;if(DHT11port){tmp=1;}u8flag = 2;while((DHT11port)&&u8flag++);if(u8flag==1)break;ret_8bit<<=1;ret_8bit |= tmp;}return ret_8bit;}void DHT11_start(unsigned char *rec_buf) {// delay_1s();DHT11port = 0;Delay20ms();DHT11port = 1;Delay10us();Delay10us();Delay10us();Delay10us();//DHT11port = 1;if(!DHT11port){u8flag=2;// while(!DHT11port);while((!DHT11port)&&u8flag++);// if(DHT11port)// {// while(DHT11port);u8flag=2;while((DHT11port)&&u8flag++);check_buf[0] = Rec_8bit();check_buf[1] = Rec_8bit();check_buf[2] = Rec_8bit();check_buf[3] = Rec_8bit();check_buf[4] = Rec_8bit();if(!DHT11port){while(!DHT11port);}DHT11port = 1;tmp = check_buf[0]+check_buf[1]+check_buf[2]+check_buf[3] ;if(tmp==check_buf[4]){rec_buf[0] = check_buf[0];rec_buf[1] = check_buf[1];rec_buf[2] = check_buf[2];rec_buf[3] = check_buf[3];}// }}else{rec_buf[0] = 0;rec_buf[1] = 0;rec_buf[2] = 0;rec_buf[3] = 0;}}/*********************************************/ LCD1602程序：#include "Library.h"void LCD1602_rsta(){unsigned char tmp;P0 = 0xFF;//this is a mustrs = 0;rw = 1;do{en = 1;//Delay1us();tmp = P0;//Delay1us();en = 0;}while(tmp&0x80);}void LCD1602_wdat(unsigned char dat) {LCD1602_rsta();rs=1;rw=0;P0 = dat;en = 1;//Delay1us();en = 0;}void LCD1602_wcmd(unsigned char cmd) {LCD1602_rsta();rs=0;rw=0;P0 = cmd;en = 1;//Delay1us();en = 0;}void Setcursor(unsigned char x,unsigned char y){if(y==0)x = x + 0x00;else if(y==1)x = x + 0x40;LCD1602_wcmd(x|0x80);}void LCD1602_wBytes(unsigned char x,unsigned char y,unsigned char *buf,unsigned char buf_len){Setcursor(x,y);while(buf_len>0){LCD1602_wdat(*buf++);buf_len--;}}void OnCursor(){LCD1602_wcmd(0x0F);}void OffCursor()LCD1602_wcmd(0x0C);}void LCD1602_init(){// Delay15ms();// LCD1602_wcmd(0x38);// Delay5ms();LCD1602_wcmd(0x38);// LCD1602_wcmd(0x08);LCD1602_wcmd(0x06);LCD1602_wcmd(0x0C);LCD1602_wcmd(0x01);}/*****************************************/ Library.h#ifndef _Library_H#define _Library_H#include <STC15.h>#include <intrins.h>#define MAIN_Fosc 11059200Lsbit DHT11port = P3^6;void DHT11_start(unsigned char *rec_buf);sbit rs = P2^4;sbit rw = P2^3;sbit en = P2^1;void LCD1602_init();void LCD1602_wBytes(unsigned char x,unsigned char y,unsigned char *buf,unsigned char buf_len);#endif/*****************************************/ 版本二（结构体）：/****************************************/ /****************************************/ main程序：#include "Library.h"#include "string.h"void Delay1000ms() //@11.0592MHz{unsigned char i, j, k;_nop_();_nop_();i = 43;j = 6;k = 203;do{do{while (--k);} while (--j);} while (--i);}void main(){unsigned char DHTstr[8];P3M1 &= 0xBF; P3M0 &= 0xBF;P2M1 &= 0xE5; P2M0 &= 0xE5;P0M1 = 0x00; P0M0 = 0x00;LCD1602_init();LCD1602_wBytes(2,0,".",1);LCD1602_wBytes(8,0,"humi",4);LCD1602_wBytes(2,1,".",1);LCD1602_wBytes(8,1,"temp",4);while(1){DHT11_start();// memset(DHTstr, 0, 8);DHTstr[0] = ht.humi_h +'0' ;DHTstr[1] = ht.humi_l+'0' ;DHTstr[2] = ht.humi_dh +'0' ;DHTstr[3] = ht.humi_dl +'0' ;DHTstr[4] = ht.temp_h +'0' ;DHTstr[5] = ht.temp_l +'0' ;DHTstr[7] = ht.temp_dh +'0' ;DHTstr[6] = ht.temp_dl +'0' ;LCD1602_wBytes(0,0,DHTstr,2);LCD1602_wBytes(3,0,DHTstr+2,2);LCD1602_wBytes(0,1,DHTstr+4,2);LCD1602_wBytes(3,1,DHTstr+6,2);Delay1000ms();Delay1000ms();}}/***********************************************/ DHT11程序：/******************************8bit humidity integer data + 8bit humidity decimal data 8bit temperature integer data + 8bit temperature decimal data8bit check sum,high bit ahead*******************************/#include "Library.h"unsigned char u8flag;unsigned char check_buf[5];unsigned char tmp;unsigned char rec_buf[4];htstruct ht;void delay_1s() //@11.0592MHz{unsigned char i, j, k;_nop_();_nop_();i = 43;j = 6;k = 203;do{do{while (--k);} while (--j);} while (--i);}void Delay10us() //@11.0592MHz {unsigned char i;_nop_();i = 25;while (--i);}void Delay20ms() //@11.0592MHz {unsigned char i, j, k;_nop_();_nop_();i = 1;j = 216;k = 35;do{do{while (--k);} while (--j);} while (--i);}unsigned char Rec_8bit(){unsigned char i;unsigned char ret_8bit;unsigned char tmp;for(i=0;i<8;i++){while(!DHT11port);Delay10us();Delay10us();Delay10us();tmp = 0;if(DHT11port){tmp=1;}u8flag = 2;while((DHT11port)&&u8flag++);if(u8flag==1)break;ret_8bit<<=1;ret_8bit |= tmp;}return ret_8bit;}void DHT11_start(){// delay_1s();DHT11port = 0;Delay20ms();DHT11port = 1;Delay10us();Delay10us();Delay10us();Delay10us();//DHT11port = 1;if(!DHT11port){u8flag=2;while((!DHT11port)&&u8flag++);u8flag=2;while((DHT11port)&&u8flag++);check_buf[0] = Rec_8bit();check_buf[1] = Rec_8bit();check_buf[2] = Rec_8bit();check_buf[3] = Rec_8bit();check_buf[4] = Rec_8bit();if(!DHT11port){while(!DHT11port);}DHT11port = 1;tmp = check_buf[0]+check_buf[1]+check_buf[2]+check_buf[3] ;if(tmp==check_buf[4]){rec_buf[0] = check_buf[0];rec_buf[1] = check_buf[1];rec_buf[2] = check_buf[2];rec_buf[3] = check_buf[3];}ht.humi_h = rec_buf[0]/10 ;ht.humi_l = rec_buf[0]%10;ht.humi_dh = rec_buf[1]/10;ht.humi_dl = rec_buf[1]%10;ht.temp_h = rec_buf[2]/10;ht.temp_l = rec_buf[2]%10;ht.temp_dh = rec_buf[3]/10;ht.temp_dl = rec_buf[3]%10; }else{ht.humi_h = 0;ht.humi_l = 0;ht.humi_dh = 0;ht.humi_dl = 0;ht.temp_h = 0;ht.temp_l = 0;ht.temp_dh = 0;ht.temp_dl = 0;}}/************************************************/ LCD1602程序：#include "Library.h"void LCD1602_rsta(){unsigned char tmp;P0 = 0xFF;//this is a mustrs = 0;rw = 1;do{en = 1;//Delay1us();tmp = P0;//Delay1us();en = 0;}while(tmp&0x80);}void LCD1602_wdat(unsigned char dat){LCD1602_rsta();rs=1;rw=0;P0 = dat;en = 1;//Delay1us();en = 0;}void LCD1602_wcmd(unsigned char cmd){LCD1602_rsta();rs=0;rw=0;P0 = cmd;en = 1;//Delay1us();en = 0;}void Setcursor(unsigned char x,unsigned char y){if(y==0)x = x + 0x00;else if(y==1)x = x + 0x40;LCD1602_wcmd(x|0x80);}void LCD1602_wBytes(unsigned char x,unsigned char y,unsigned char *buf,unsigned char buf_len){Setcursor(x,y);while(buf_len>0){LCD1602_wdat(*buf++); buf_len--;}}void OnCursor(){LCD1602_wcmd(0x0F);}void OffCursor(){LCD1602_wcmd(0x0C);}void LCD1602_init(){// Delay15ms();// LCD1602_wcmd(0x38);// Delay5ms();LCD1602_wcmd(0x38);// LCD1602_wcmd(0x08);LCD1602_wcmd(0x06);LCD1602_wcmd(0x0C);LCD1602_wcmd(0x01);}/******************************************/ Library.h#ifndef _Library_H#define _Library_H#include <STC15.h>#include <intrins.h>#define MAIN_Fosc 11059200Lsbit DHT11port = P3^6;typedef struct htstruct{unsigned char humi_h;unsigned char humi_l;unsigned char humi_dh;unsigned char humi_dl;unsigned char temp_h;unsigned char temp_l;unsigned char temp_dh;unsigned char temp_dl;}htstruct;extern htstruct ht;void DHT11_start();sbit rs = P2^4;sbit rw = P2^3;sbit en = P2^1;void LCD1602_init();void LCD1602_wBytes(unsigned char x,unsigned char y,unsigned char *buf,unsigned char buf_len);#endif。