#物联网#一个小型的物联网系统——智能窗帘控制系统嵌入式kkkkkkc1的博客-

介绍

涉及模块：

1.LCD1602液晶屏

2.DS18B20温度传感器

3.ADC0832数模转换芯片

4.TORCH_LDR光照度控件

5.步进电机

实现功能：

1.在LCD上显示实时温度与窗帘状态。

2.温度在15~25℃范围内开窗帘，范围外关窗帘。

3.光线强时关窗帘，光线弱时开窗帘。

4.可通过按钮手动开关窗帘。

仿真图

窗帘系统Proteus仿真图：

代码

项目由以下6个文件组成 ：

• main.c
• define.h
• delay.h
• DS18B20.h
• LCD1602.h
• ADC0832.h

main.c

#include <reg52.h> #include <intrins.h> #include "define.h" #include "delay.h" #include "LCD1602.h" #include "DS18B20.h" #include "ADC0832.h" void main() { //开启T0中断  EA = 1;  ET0 = 1;  ET1 = 1; //设置T0  TMOD = 0X01;  TH0 = 0XFFED;  TL0 = 0XFFFF;    TR0 = 1; LCD_init(); while(1) { DS_read_temperature(); display_temperature(); LightIntensity(ADC0832()); // LCD_write_data(Temp_AD);//在LCD上显示光照强度的数值   if(flag) { //关窗 if(status==0||Temp_AD<=Standard) { for(;i<sizeof(Run);i++) {      P2 = Run[i]; delayms(RunSpeed); } } //开窗 else { for(;i>0;i--) {      P2 = Run[i]; delayms(RunSpeed); } } } } } //定时器0中断服务 void InterruptTimer() interrupt 1 {  TH0 = 0XFFED;  TL0 = 0XFFFF; if (key1==0) { //顺时钟   flag=0; for(;i<sizeof(Run);i++) {    P2 = Run[i]; delayms(RunSpeed); } } if (key2==0) { //逆时钟   flag=0; for(;i>0;i--) {    P2 = Run[i]; delayms(RunSpeed); } } } 

define.h

#ifndef _DEFINE_H_ #define _DEFINE_H_ #define uchar unsigned char #define uint unsigned int  sbit RS=P2^6; sbit RW=P2^5; sbit EN=P2^7; sbit DQ=P3^3; sbit CLK=P3^1; sbit CS=P3^0; sbit DO=P3^2; bit DS_OK=1; sbit key1 = P1^0; //开关开窗帘  sbit key2 = P1^1; //开关关窗帘          uchar code Run[]={ 0x00,0x01,0x03,0x02,0x06,0x04,0x0C,0x08,0x09,0xff};  uchar RunSpeed = 60; uchar status=0; uchar i=0; uchar Temp_AD=0;//现在的光照强度 uchar Standard='F';//光照强弱临界值 bit flag=1; //手动模式/自动模式的标志 uchar CurtainStatu[]={"  STATE :                  "}; uchar buffer_line2[]={"  Temp:       C            "}; uchar code df_tab[]={0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,9}; uchar current=0; uchar display_digit[]={0,0,0,0}; uchar temp_value[]={0x00,0x00}; uchar back_temp_value[]={0x00,0x00}; char alarm_HL[]={70,-10}; char sign_temp; bit LO_alarm=0; bit HI_alarm=0; #endif 

delay.h

#ifndef _DELAY_H_ #define _DELAY_H_ void delay(uint z) {  uint x; while(z--) for(x=50;x>0;x--); } void delay0(uint z) {  uint x,y; for(x=z;x>0;x--) for(y=0;y<10;y++); } void delay1(uint y) {  uint x; while(y--) for(x=4500;x>0;x--); } void delayms(uchar x) { int i,j; for(i=x;i>0;i--) for(j=0;j<120;j++); } void delay_us() {_nop_();_nop_(); _nop_();_nop_();} void delay_1us(uint x) //延时 { while(--x); } #endif 

DS18B20.h

#ifndef _DS18B20_H_ #define _DS18B20_H_ #include "define.h" #include "DELAY.H" #include "LCD1602.h" #include <string.h> /*****************************************************/ /************全局都要精确延时************************/ uchar DS_init() {  uchar state;      DQ=1; delay_1us(8);  DQ=0; delay_1us(80); //精确延时大于4800US  DQ=1; delay_1us(8);  state=DQ; delay(100); //延时 return state; //返回值为1时，初始化失败 } void DS_write_byte(uchar dat) {  uchar i; for(i=0;i<8;i++) { if((dat&0x01)==0) //写一 {    DQ=0; delay_1us(5);      DQ=1; //精确延时，形成脉冲 } else //写0 {    DQ=0; delay_1us(1);    DQ=1; delay_1us(4); }   dat>>=1; } }  uchar DS_read_byte() {  uchar i,dat=0; for(i=0;i<8;i++) {   DQ=0;   dat>>=1;   DQ=1; if(DQ==1)    dat|=0x80; else    dat|=0x00; delay_1us(30);   DQ=1; } return dat; } void DS_read_temperature() { if(DS_init()==1) //返回值为1时   DS_OK=0; //DS_ok=0代表失败 else { DS_init(); DS_write_byte(0xcc);//跳过序列号 DS_write_byte(0x44); //启动温度转换 DS_init(); DS_write_byte(0xcc); DS_write_byte(0xbe);//启动读取温度   temp_value[1]=DS_read_byte(); //先写低位在写高位   temp_value[0]=DS_read_byte();   DS_OK=1; } } void display_temperature() {  uchar flag=0; if((temp_value[0]&0xf8)==0xf8) {   flag=1;   temp_value[0]=~temp_value[0];   temp_value[1]=~temp_value[1]+1; if(temp_value[1]==0x00)    temp_value[0]++; }  display_digit[3]=df_tab[temp_value[1]&0x0f];//取小数 //取整数  current=((temp_value[0]&0x07)<<4)|((temp_value[1]&0xf0)>>4); if(current<=25&&current>=15)  status=1;//15~25°C开窗帘  else  status=0;//范围之外关窗帘 //判断正负  sign_temp=flag?-current:current;    LO_alarm=sign_temp<=alarm_HL[1]?1:0;   HI_alarm=sign_temp>=alarm_HL[0]?1:0; /*********分解整数*************************************/  display_digit[0]=current/100;  display_digit[1]=current%100/10;  display_digit[2]=current%10; /****装入缓冲*********************************************/  buffer_line2[8]=display_digit[0]+'0';  buffer_line2[9]=display_digit[1]+'0';  buffer_line2[10]=display_digit[2]+'0';  buffer_line2[11]='.';  buffer_line2[12]=display_digit[3]+'0'; /*********屏蔽高位不显示*******************************/ if(display_digit[0]==0)   buffer_line2[8]=' '; if(display_digit[0]==0&&display_digit[1]==0)   buffer_line2[9]=' '; if(flag==1) { if(buffer_line2[9]==' ')    buffer_line2[9]='-'; else { if(buffer_line2[8]==' ')     buffer_line2[8]='-'; else     buffer_line2[7]='-'; } } if (i==0) strcpy(CurtainStatu,"  STATE : OPEN             "); else if(i==sizeof(Run)) strcpy(CurtainStatu,"  STATE : CLOSE            "); LCD_write_cmd(0x00); LCD_display(0x00,CurtainStatu); LCD_display(0x40,buffer_line2); LCD_write_cmd(0x80+0x4d); LCD_write_data(0x00); LCD_write_cmd(0x80+0x4e); LCD_write_data('C'); } #endif 

LCD1602.h

#ifndef _LCD1602_H_ #define _LCD1602_H_  uchar LCD_check_busy() {  uchar state;  RS=0;  RW=1; delay(2);  EN=1;  state=P0; delay(2);  EN=0; delay(2); return state; } void LCD_write_cmd(uchar cmd) { while((LCD_check_busy()&0x80)==0x80);  RS=0;  RW=0; delay(2);  EN=1;  P0=cmd; delay(2);  EN=0; delay(2); } void LCD_write_data(uchar dat) { while((LCD_check_busy()&0x80)==0x80);  RS=1;  RW=0; delay(2);  EN=1;  P0=dat; delay(2);  EN=0; delay(2); } void LCD_display(uchar position,uchar *s) {  uchar i; LCD_write_cmd(0x80+position); for(i=0;i<16;i++) { LCD_write_data(s[i]); } } void LCD_init() { LCD_write_cmd(0x38); LCD_write_cmd(0x0c); LCD_write_cmd(0x06); LCD_write_cmd(0x01); } #endif 

ADC0832.h

#ifndef _ADC0832_H_ #define _ADC0832_H_  uchar ADC0832() {  uchar i,temp;  CLK=0;  CS=0;//选中AD芯片 delay0(1);  DO=1;//发送bit1 说明开始转换  CLK=1;//一个上升沿 将开始位输出ADC0832 delay0(1);  CLK=0;  DO=1; delay0(1);  CLK=1; delay0(1);  CLK=0;  DO=0; delay0(1);  CLK=1; delay0(1);  CLK=0;  DO=1; for(i=8;i>0;i--) {   CLK = 1; delay(1);   CLK=0; delay(1);   temp|=DO; if(DO)    temp++;   temp<<1; }  CS=1;//释放芯片 return temp;//返回读回来的数值 } void LightIntensity(unsigned char num1) { //ad在光度强的时候采集回来的电压是小的数值 //为了方便显示用255将其取反，为光度越强的时候数值越大 //保留实际ad的数值 比如ad50的时候对应80 //转换为更100有关的高度  num1=num1/2.55;  Temp_AD=100-num1; } 

末尾献上可运行资源，需要自取

戳这里