|
一、任务简述
本次设计采用基于单片机的智能加湿器系统，以STM32F103C8T6和温湿度传感器DHT11为核心，通过湿度传感器采集和转换温湿度信号，再利用单片机进行数据分析和处理，实现智能开启和关闭加湿功能，并通过继电器控制加湿器，以实现对湿度的精准调节。实现加湿器防干烧和实时显示室内相对湿度的功能，需要外接辅助电路的支持。由于其简洁明了的电路设计、易于读取的特点以及高精度的检测能力，该系统在可靠性和实用价值方面均呈现出卓越的水平。
二、总体设计
三、软件设计
Main主程序
#include "common.h"
#include "lcd1602.h"
#include "dht.h"
extern unsigned char U8RH_data_H;
extern unsigned char U8T_data_H;
sbit key1 = P1^0;//切换键
sbit key2 = P1^1;//加键
sbit key3 = P1^2;//减键
sbit RELAY = P3^7;//继电器
sbit beep = P2^0;//蜂鸣器
sbit ShuiWei=P1^4;//水位传感器
unsigned char HumiMin = 15;//湿度下限
unsigned char setn = 0;//设置标志
bit mode = 0;//模式：0是自动模式，1是手动模式
void keyscan()
{
if(key1 == 0)//切换键按下
{
delay_ms(10);
if(key1 == 0)
{
beep = 0;
delay_ms(100);
beep = 1;
while(key1 == 0);//等待按键松开
mode = !mode;
if(mode==0)lcd_write_str(14,0,"Zd");
else lcd_write_str(14,0,"Sd");
}
}
if(key2 == 0)
{
delay_ms(10);
if(key2 == 0)
{
beep = 0;
delay_ms(100);
beep = 1;
while(key2 == 0);
if(mode==0)//在自动模式下是加键
{
if(HumiMin < 99)HumiMin++;
lcd_write_char(9,1,HumiMin/10+0x30);
lcd_write_char(10,1,HumiMin%10+0x30);
}
else//在手动模式下是手动开启键
{
RELAY = 0;//继电器开启
}
}
}
if(key3 == 0)
{
delay_ms(10);
if(key3 == 0 )
{
beep = 0;
delay_ms(100);
beep = 1;
while(key3 == 0);
if(mode==0)//在自动模式下是减键
{
if(HumiMin > 0)HumiMin--;
lcd_write_char(9,1,HumiMin/10+0x30);
lcd_write_char(10,1,HumiMin%10+0x30);
}
else//在手动模式下是手动关闭键
{
RELAY = 1;//继电器关闭
}
}
}
}
void main()
{
unsigned int count;
short temperature;
short humidity;
bit shanshuo=0;
lcd_init();//1602液晶初始化
lcd_write_str(0,0,"00C Humi:00% Zd");
lcd_write_str(0,1," Minimum:00% ");
lcd_write_char(9,1,HumiMin/10+0x30);
lcd_write_char(10,1,HumiMin%10+0x30);
do
{
RH();delay_ms(100);
}while(U8RH_data_H==0&&U8T_data_H==0);
while(1)
{
keyscan();//按键扫描
if(count++>=500)//延时一段时间
{
count=0;
shanshuo=!shanshuo;
RH();
//读出温湿度，只取整数部分
humidity = U8RH_data_H;
temperature = U8T_data_H;
lcd_write_char(0,0,temperature/10+0x30);
lcd_write_char(1,0,temperature%10+0x30);
lcd_write_char(9,0,humidity/10+0x30);
lcd_write_char(10,0,humidity%10+0x30);
if(ShuiWei==0 && shanshuo)//缺水
{
lcd_write_str(14,1,"Qs");
beep = 0;
}
else
{
lcd_write_str(14,1," ");
beep = 1;
}
if(mode==0)//在自动模式下
{
if(humidity |