单片机粮仓温湿度控制系统原理图和源码 DHT11传感器

ID:262 · 发表于 2017-7-29 02:13

给大伙分享一个51单片机做粮仓温湿度控制系统，下面是原理图基于dht11传感器做的.

单片机源程序如下:

#include <reg52.h>
#include "1602.h"
#include "dht.h"
#include "2402.h"
//定义三个LED灯
sbit Led_qushi=P1^6; //去湿灯
sbit Led_jiangwen=P1^5; //降温灯
sbit Led_shengwen=P1^4; //升温灯
sbit Key_TH1 = P3^2;
sbit Key_TH2 = P3^3;
sbit Key_HH1 = P3^4;
sbit Key_HH2 = P3^5;
//定义标识
volatile bit FlagStartRH = 0; //开始温湿度转换标志
volatile bit FlagKeyPress = 0; //有键按下
//定义温湿度传感器用外部变量
extern U8 U8FLAG,k;
extern U8 U8count,U8temp;
extern U8 U8T_data_H,U8T_data_L,U8RH_data_H,U8RH_data_L,U8checkdata;
extern U8 U8T_data_H_temp,U8T_data_L_temp,U8RH_data_H_temp,U8RH_data_L_temp,U8checkdata_temp;
extern U8 U8comdata;
extern U8 count, count_r;
U16 temp;
S16 temperature, humidity;
S16 idata TH, HH; //温度上限和湿度上限
char * pSave;
U8 keyvalue, keyTH1, keyTH2, keyHH1, keyHH2;
//定义变量
U16 RHCounter;
//数据初始化
void Data_Init()
{
RHCounter = 0;
Led_qushi = 1;
Led_jiangwen = 1;
Led_shengwen = 1;
TH = 40;
HH = 85;
keyvalue = 0;
keyTH1 = 1;
keyTH2 = 1;
keyHH1 = 1;
keyHH2 = 1;
}
//定时器0初始化
void Timer0_Init()
{
ET0 = 1; //允许定时器0中断
TMOD = 1; //定时器工作方式选择
TL0 = 0x06;
TH0 = 0xf8; //定时器赋予初值
TR0 = 1; //启动定时器
}
//定时器0中断
void Timer0_ISR (void) interrupt 1 using 0
{
TL0 = 0x06;
TH0 = 0xf8; //定时器赋予初值
//每2秒钟启动一次温湿度转换
RHCounter ++;
if (RHCounter >= 1000)
{
FlagStartRH = 1;
RHCounter = 0;
}
}
//存入设定值、
void Save_Setting()
{
pSave = (char *)&TH; //地址低位对应低8位，高位对应高8位
wrteeprom(0, *pSave); //存温度上限值TH低8位
DELAY(500);
pSave ++;
wrteeprom(1, *pSave); //存温度上限值TH高8位
DELAY(500);
pSave = (char *)&HH;
wrteeprom(2, *pSave); //存湿度上限值RH低8位
DELAY(500);
pSave ++;
wrteeprom(3, *pSave); //存湿度上限值RH高8位
DELAY(500);
}
//载入设定值、
void Load_Setting()
{
pSave = (char *)&TH;
*pSave++ = rdeeprom(0);
*pSave = rdeeprom(1);
pSave = (char *)&HH;
*pSave++ = rdeeprom(2);
*pSave = rdeeprom(3);
if ((TH>99)||(TH<0)) TH = 40;
if ((HH>99)||(HH<0)) HH = 85;
}
void KeyProcess(uint num)
{
switch (num)
{
case 1:
if (TH<99) TH++;
L1602_char(1, 15, TH/10+48);
L1602_char(1, 16, TH%10+48);
break;
case 2:
if (TH>1) TH--;
L1602_char(1, 15, TH/10+48);
L1602_char(1, 16, TH%10+48);
break;
case 3:
if (HH<99) HH++;
L1602_char(2, 15, HH/10+48);
L1602_char(2, 16, HH%10+48);
break;
case 4:
if (HH>1) HH--;
L1602_char(2, 15, HH/10+48);
L1602_char(2, 16, HH%10+48);
break;
default:
break;
}
Save_Setting();
}
/********************************************************************
* 名称 : Main()
* 功能 : 主函数
***********************************************************************/
void main()
{
U16 i, j, testnum;
EA = 0;
Timer0_Init(); //定时器0初始化
Data_Init();
EA = 1;
L1602_init();
L1602_string(1,1," Welcome to T&H ");
L1602_string(2,1," Control System! ");
//延时
for (i=0;i<500;i++)
for (j=0;j<1000;j++)
{;}
//清屏
L1602_string(1,1," ");
L1602_string(2,1," ");
L1602_string(1,1,"Tem: C TH:");
L1602_string(2,1,"Hum: % HH:");
//载入温度上限和湿度上限设定值
Load_Setting();
L1602_char(1, 15, TH/10+48);
L1602_char(1, 16, TH%10+48);
L1602_char(2, 15, HH/10+48);
L1602_char(2, 16, HH%10+48);
while(1)
{
//温湿度转换标志检查
if (FlagStartRH == 1)
{
TR0 = 0;
testnum = RH();
FlagStartRH = 0;
TR0 = 1;
//读出温湿度，只取整数部分
humidity = U8RH_data_H;
temperature = U8T_data_H;
//显示温湿度
L1602_int(1,5,temperature);
L1602_int(2,5,humidity);
}
//温湿度控制
if (temperature > TH) Led_jiangwen = 0;
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