目录
一、主要功能
二、硬件资源
三、程序编程
四、实现现象
一、主要功能
基于51单片机，采样DHT11温湿度传感器检测温湿度，滑动变阻器连接数码转换器模拟电量采集传感器，
电机采样L298N驱动，各项参数通过LCD1602显示，如果电量低于阈值，电机停止转动，小车停止前进；
如果电流高于阈值，则电机转动，这个电机采样两个电机，一个负责纵向，一个负责横向，纵向横向来回
转换；
如果温度/湿度高于程序里设置好得阈值 湿度阈值70，则蜂鸣器发出警报；
二、硬件资源
基于KEIL5编写C++代码，PROTEUS8.15进行仿真，全部资源在页尾，提供安装包。
编辑
编辑
三、程序编程
#include <REGX52.H>#include<intrins.h>#include<stdio.h>#include "Delay.h"#include "LCD1602.h"#define uchar unsigned char#define uint unsigned intsbit CS=P1^0; //adc0832引脚sbit CLK=P1^1;
sbit DIO=P1^2;
sbit beep=P3^4;
sbit out1 = P3^6;
sbit out2 = P3^7;
sbit out3 = P3^0;
sbit out4 = P3^1;
sbit Temp\_data=P2^6; //DHT11unsigned char rec\_dat\_lcd0\[6\];unsigned char rec\_dat\_lcd1\[6\];unsigned char rec\_dat\_lcd2\[6\];unsigned char rec\_dat\_lcd3\[6\];unsigned int rec\_dat\[4\];static double u,U;static uchar wd,sd;static int num,num1,flag,flag1=0;static int wdyz=40,sdyz=70,dlyz=30;void DHT11\_delay\_us(unsigned char n);void DHT11\_delay\_ms(unsigned int z);void DHT11\_start();unsigned char DHT11\_rec\_byte();void DHT11\_receive();void beep\_warning();void cshq();void xspxs();void motorzx();void motorhx();//延时msvoid DHT11\_delay_ms(unsigned int z){ unsigned int i,j; for(i=z; i>0; i--) for(j=110; j>0; j--);
}//延时us --2*n+5usvoid DHT11\_delay\_us(unsigned char n){ while(--n);
}//DHT11起始信号void DHT11_start(){Temp\_data=1; DHT11\_delay_us(10);Temp\_data=0; DHT11\_delay_ms(50);//这个延时不能过短,18ms以上,实际在仿真当中要想读到数据延时要在延时参数要在40以上才能出数据Temp\_data=1; DHT11\_delay\_us(30);//这个延时不能过短}//接收一个字节unsigned char DHT11\_rec_byte(){ unsigned char i,dat=0; for(i=0; i<8; i++){ while(!Temp\_data); DHT11\_delay_us(8);dat <<=1; if(Temp_data==1){dat +=1;} while(Temp_data);} return dat;
}//接收温湿度数据void DHT11\_receive(){ unsigned int R\_H,R\_L,T\_H,T\_L; unsigned char RH,RL,TH,TL,revise; DHT11\_start();Temp\_data=1; if(Temp\_data==0){ while(Temp_data==0); //等待拉高DHT11\_delay\_us(40); //拉高后延时80usR\_H=DHT11\_rec_byte(); //接收湿度高八位R\_L=DHT11\_rec_byte(); //接收湿度低八位T\_H=DHT11\_rec_byte(); //接收温度高八位T\_L=DHT11\_rec_byte(); //接收温度低八位revise=DHT11\_rec\_byte(); //接收校正位DHT11\_delay\_us(25); //结束if((R\_H+R\_L+T\_H+T\_L)==revise) //校正{RH=R_H;RL=R_L;TH=T_H;TL=T_L;} /*数据处理，方便显示*/rec_dat\[0\]=RH;rec_dat\[1\]=RL;rec_dat\[2\]=TH;rec_dat\[3\]=TL;}}void dht11(){TR1 = 0;// DHT11\_delay\_ms(150);DHT11\_receive(); sprintf(rec\_dat\_lcd0,"%d",rec\_dat\[0\]); sprintf(rec\_dat\_lcd1,"%d",rec\_dat\[1\]); sprintf(rec\_dat\_lcd2,"%d",rec\_dat\[2\]); sprintf(rec\_dat\_lcd3,"%d",rec\_dat\[3\]); DHT11\_delay_ms(100);wd = rec\_dat\[3\]*10 + rec\_dat\[2\];sd = rec\_dat\[1\]*10 + rec\_dat\[0\];TR1 = 1;}void Time1Init() //定时器1{TMOD |= 0x10;TH1 = (65536-57567)/256;TL1 = (65536-57567)%256;EA = 1;ET1 = 1;TR1 = 1;
}void Time1Start() interrupt 3 //定时器1中断{TH1 = (65536-57567)/256;TL1 = (65536-57567)%256;num++; if(num == 2)//达到1s{ dht11(); //温湿度获取cshq(); //参数获取xspxs(); //显示屏显示beep_warning(); //状态判断num = 0; }num1++; if(num1 == 2){ if(flag1 == 0){ motorzx();//纵向行走Delay(200); motorhx(); //横向行走Delay(200); } else{out1=0;out2=0;out3=0;out4=0;}num1 = 0;}
}uchar get\_AD\_Res() //ADC0832启动读取函数{uchar i, data1=0, data2=0;CS=0;CLK=0;DIO=1;\_nop\_();CLK=1;\_nop\_();CLK=0;DIO=1;\_nop\_(); CLK=1;\_nop\_();CLK=0;DIO=0;\_nop\_();CLK=1;\_nop\_();CLK=0;DIO=1;\_nop\_(); for(i=0; i<8; i++){CLK=1;\_nop\_();CLK=0;\_nop\_();data1=(data1<<1)|(uchar)DIO; } for(i=0; i<8; i++){data2=data2|(uchar)DIO<<i;CLK=1;\_nop\_();CLK=0;\_nop\_();}CS=1; return(data1 == data2)?data1:0;
}void beep_warning()//蜂鸣器警报并且电机转动{ if(wd>wdyz || sd>sdyz || U < dlyz){flag = 1;} else{flag = 0;} if(U<dlyz){flag1 = 1;} else{flag1 = 0;} if(flag == 1){beep = 1;} else{beep = 0;}
}void main() //主函数{ LCD_Init(); //显示屏初始化 Time1Init(); //定时器beep = 0; while(1){ }
}void motorzx() //纵向{out1 = 1;out2 = 0;out3 = 0;out4 = 0;
}void motorhx() //横向{out1 = 0;out2 = 0;out3 = 1;out4 = 0;
}void xspxs() //显示屏显示{ LCD_ShowString(1,1,"wd:"); LCD_ShowNum(1,4,wd,2); //温度LCD_ShowString(1,6,"sd:"); LCD_ShowNum(1,9,sd,2); //湿度LCD_ShowString(1,11,"dl:"); LCD_ShowNum(1,14,U,2); //电量LCD_ShowString(2,1,"wd:"); LCD_ShowNum(2,4,wdyz,2); //温度LCD_ShowString(2,6,"sd:"); LCD_ShowNum(2,9,sdyz,2); //湿度LCD_ShowString(2,11,"dl:"); LCD_ShowNum(2,14,dlyz,2); //电量}void cshq() //参数获取{u=get\_AD\_Res();U=(u/255)*99;
}
四、实现现象
具体动态效果看B站演示视频：
B站演示视频
基于单片机的小车行走加温湿度检测系统
全部资料（源程序、仿真文件、安装包、原理图、演示视频）：
百度网盘资料下载https://pan.baidu.com/s/1T3THUMoisAv-Bmc30W869g?pwd=rnzb
