DHT11温湿度控制系统源代码 -

温湿度控制系统源代码

单片机源程序如下:

//****************************************************************//
//单片机 : STC89C52RC
//硬件连接： P1.7口为通讯口连接DHT11,DHT11的电源和地连接单片机的电源和地。
//****************************************************************//
#include <reg52.h>
#include "1602.h"
#include "dht.h"
#include "2402.h"
//定义两个个LED灯
sbit Led_jiangwen=P1^5; //加热灯
sbit Led_shengwen=P1^4; //加湿灯
sbit fmq=P1^3; //蜂鸣器
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
volatile bit fmqt = 0;
volatile bit fmqh = 0;
//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; //温度下限和湿度下限
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); //存温度下限值TH高8位
DELAY(500);
pSave ++;
wrteeprom(3, *pSave); //存湿度下限值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<1000;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:");
//载入温度下限和湿度下限设定值
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;
fmqt=1;
}
else
{
Led_jiangwen= 1;
fmqt=0;
} //加热
if(humidity > HH)
{
Led_qushi= 0;
fmqh=1;
}
else
{
Led_qushi= 1;
fmqh=0;
} //加湿
if((fmqt==1)||(fmqh==1))
fmq=0;
else
fmq=1;
//键盘查询，在弹起时响应
if((Key_TH1)&&(keyTH1==0)) {FlagKeyPress = 1; keyvalue = 1;}
else if ((Key_TH2)&&(keyTH2==0)) {FlagKeyPress = 1; keyvalue =2;}
else if ((Key_HH1)&&(keyHH1==0)) {FlagKeyPress = 1; keyvalue =3;}
else if ((Key_HH2)&&(keyHH2==0)) {FlagKeyPress = 1; keyvalue =4;}
if(FlagKeyPress == 1)
{
KeyProcess(keyvalue);
FlagKeyPress = 0;
}
if (!Key_TH1) keyTH1 = 0;
elsekeyTH1 = 1;
if (!Key_TH2) keyTH2 = 0;
elsekeyTH2 = 1;
if (!Key_HH1) keyHH1 = 0;
elsekeyHH1 = 1;
if (!Key_HH2) keyHH2 = 0;
elsekeyHH2 = 1;
}
}

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