基于51单片机的DHT11温湿度测量报警系统

#include <reg52.h> //调用单片机头文件 #define uchar unsigned char //无符号字符型 宏定义 变量范围0~255 #define uint unsigned int //无符号整型 宏定义 变量范围0~65535 #include<intrins.h> #include "eeprom52.h" sbit beep = P1^4; //蜂鸣器IO口定义 uchar a_a; bit flag_300ms ; // 按键的IO变量的定义 uchar key_can; //按键值的变量 uchar menu_shudu = 20; //用来控制连加的速度 uchar menu_1; //菜单设计的变量 uint t_high = 30,t_low = 10; //温度报警参数 uint s_high = 30,s_low = 10; //湿度报警参数 uchar flag_w_bj_en,flag_s_bj_en; bit flag_lj_en; //按键连加使能 bit flag_lj_3_en; //按键连3次连加后使能 加的数就越大了 uchar key_time,flag_value; //用做连加的中间变量 bit key_500ms ; uchar flag_clock; //温度报警变量 uchar flag_fuzi; //用做菜单内的初始化的 /*************************************************************** * 名称 : delay_1ms() * 功能 : 延时1ms函数 * 输入 : q * 输出 : 无 ****************************************************************/ void delay_1ms(uint q) { uint i,j; for(i=0;i<q;i++) for(j=0;j<120;j++); } sbit dht11=P1^5; //温度传感器IO口定义 uchar table_dht11[5]={1,2,3,4,5}; /******************把数据保存到单片机内部eeprom中******************/ void write_eeprom() //保存数据 { SectorErase(0x2000); byte_write(0x2000, t_high); byte_write(0x2001, t_low); byte_write(0x2002, s_high); byte_write(0x2003, s_low); byte_write(0x2055, a_a); } /******************把数据从单片机内部eeprom中读出来*****************/ void read_eeprom() //读出保存数据 { t_high = byte_read(0x2000); t_low = byte_read(0x2001); s_high = byte_read(0x2002); s_low = byte_read(0x2003); a_a = byte_read(0x2055); } ///**************开机自检eeprom初始化*****************/ void init_eeprom() ////开始初始化保存的数据 { read_eeprom(); //读出保存数据 if(a_a != 2) //新的单片机初始单片机内问eeprom { t_high = 40,t_low = 10; s_high = 95,s_low = 10; a_a = 2; write_eeprom(); //保存数据 } } #include "lcd1602.h" //#include "menu.h" /*************定时器0初始化程序***************/ void time_init() { EA = 1; //开总中断 TMOD = 0X01; //定时器0、定时器1工作方式1 ET0 = 1; //开定时器0中断 TR0 = 1; //允许定时器0定时 } /********************独立按键程序*****************/ uchar key_can; //按键值 void key() //独立按键程序 { static uchar key_new; key_can = 20; //按键值还原 P3 |= 0xf0; if((P3 & 0xf0) != 0xf0) //按键按下 { delay_1ms(1); //按键消抖动 if(((P3 & 0xf0) != 0xf0) && (key_new == 1)) { //确认是按键按下 key_new = 0; switch(P3 & 0xf0) { case 0xd0: key_can = 3; break; //得到k1键值 case 0xb0: key_can = 2; break; //得到K2键值 case 0x70: key_can = 1; break; //得到k3键值 } } } else key_new = 1; } /****************按键显示函数***************/ void key_with() { if(key_can == 1) //设置键 { menu_1 ++; if(menu_1 > 4) { menu_1 = 0; init_1602(); //lcd1602初始化 } if(menu_1 == 1) //初始化显示 { write_string(1,0," WH: WL: "); write_string(2,0," SH: % SL: % "); write_zifu(1,6,0xdf); //显示度 write_zifu(1,13,0xdf); //显示度 write_sfm2(1,4,t_high); //显示温度 write_sfm2(1,11,t_low); //显示温度 write_sfm2(2,4,s_high); //显示湿度 write_sfm2(2,11,s_low); //显示湿度 } } if(menu_1 == 1) //设置高温报警 { if(key_can == 2) { t_high ++ ; //设置高温值加1 if(t_high > 99) t_high = 99; } if(key_can == 3) { t_high -- ; //设置高温值减1 if(t_high <= t_low) t_high = t_low + 1; } write_sfm2(1,4,t_high); //显示温度 write_com(0x80+3); //将光标移动到秒个位 write_com(0x0f); //显示光标并且闪烁 write_eeprom(); //保存数据 } if(menu_1 == 2) //设置低温报警 { if(key_can == 2) { t_low ++ ; //设置低温值加1 if(t_low >= t_high) t_low = t_high - 1; } if(key_can == 3) //设置高温值减1 { t_low -- ; if(t_low <= 1) t_low = 1; } write_sfm2(1,11,t_low); //显示湿度 write_com(0x80+10); //将光标移动到秒个位 write_com(0x0f); //显示光标并且闪烁 write_eeprom(); //保存数据 } if(menu_1 == 3) //设置高湿报警 { if(key_can == 2) { s_high ++ ; //设置高湿值加1 if(s_high > 99) s_high = 99; } if(key_can == 3) { s_high -- ; //设置高湿值减1 if(s_high <= s_low) s_high = s_low + 1; } write_sfm2(2,4,s_high); //显示湿度 write_com(0x80+0x40+3); //将光标移动到秒个位 write_com(0x0f); //显示光标并且闪烁 write_eeprom(); //保存数据 } if(menu_1 == 4) //设置低湿报警 { if(key_can == 2) { s_low ++ ; //设置低湿值加1 if(s_low >= s_high) s_low = s_high - 1; } if(key_can == 3) //设置低湿值减1 { s_low -- ; if(s_low <= 1) s_low = 1; } write_sfm2(2,11,s_low); //显示湿度 write_com(0x80+0x40+10); //将光标移动到秒个位 write_com(0x0f); //显示光标并且闪烁 write_eeprom(); //保存数据 } } /*****************读温湿度传感器程序****************/ void dst11() { uchar i,j; //读温湿度时不能打开中断 dht11 = 0; delay_1ms(18); dht11 = 1; delay_uint(4); //50us if(dht11 == 0) //判断是否响应 0 为响应 { while(dht11 == 0); while(dht11 == 1); //等待响应时间过完 for(i=0;i<5;i++) { for(j=0;j<8;j++) { table_dht11[i] <<= 1; while(dht11 == 0); delay_uint(4); //50us 数据1的高电平时间为110us 低为27us if(dht11 == 1) { table_dht11[i] |= 0x01; while(dht11 == 1); } } } } dht11 = 1; } /****************报警函数***************/ void clock_h_l() { static uchar value,value1,value2; if((table_dht11[0] <= s_low) || (table_dht11[0] >= s_high)) { value1 ++; //消除湿度在边界时的干扰 if(value1 > 2) flag_s_bj_en = 1; //湿度报警标志位 } else if((table_dht11[0] > (s_low )) || (table_dht11[0] < (s_high))) { value1 ++; //消除湿度在边界时的干扰 if(value1 > 2) flag_s_bj_en = 0; //湿度取消报警 } else value1 = 0; if((table_dht11[2] <= t_low) || (table_dht11[2] >= t_high)) { value2 ++; //消除温度在边界时的干扰 if(value2 > 2) { flag_w_bj_en = 1; //温度 报警标志位 } } else if((table_dht11[2] > (t_low )) || (table_dht11[2] > (t_high))) { value2 ++; //消除温度在边界时的干扰 if(value2 > 2) { flag_w_bj_en = 0; //温度取消报警 } }else value2 = 0; if(menu_1 == 0) { value ++; //用做报警的 if(value > 5) value = 0; if((flag_s_bj_en == 1) && (flag_w_bj_en == 1)) { if(value < 3) write_string(1,0,"wen shi du arlam"); else write_string(1,0," "); }else if(flag_w_bj_en == 1) { if(value < 3) write_string(1,0," wendu arlam "); else write_string(1,0," "); }else if(flag_s_bj_en == 1) { if(value < 3) write_string(1,0," shidu arlam "); else write_string(1,0," "); }else write_string(1,0," DHT11 Kz System "); } if((flag_s_bj_en == 1) || (flag_w_bj_en == 1)) beep = ~beep; //蜂鸣器报警 else beep = 1; } /******************主程序**********************/ void main() { beep = 0; //开机叫一声 delay_1ms(150); P0 = P1 = P2 = P3 = 0xff; init_eeprom(); ////开始初始化保存的数据 time_init(); //定时器初始化 init_1602(); //lcd1602初始化 dst11(); //先读出温湿度的值 while(1) { if(flag_300ms == 1) { flag_300ms = 0; if(beep == 1) dst11(); //先读出温湿度的值 if(menu_1 == 0) //开始界面显示的内容 { write_sfm2(2,10,table_dht11[0]);