- #include <reg51.h>
- #include "key_contrl.h"
- #include "lcd1602.h"
- #define LCM_Data P1
- #define Busy 0x80 //用于检测 LCM 状态字中的 Busy 标识
- extern int temp_value, humi_value;
- extern int flag;
- extern int temp;
- sbit red=P2^6;
- sbit blue=P2^7;
- sbit LCM_RW= P2^4; // 定义引脚
- sbit LCM_RS= P2^5;
- sbit LCM_E= P2^3;
- sbit beep = P0^6; //beep = 0时候发声
- extern int temph,templ,disp_mode,huih,huil;
- extern char tel,teh,hh,hl;
- //写数据
- void alarm()
- {
- beep=0;
- Delay5Ms();
- Delay5Ms();
- beep=1;
- Delay5Ms();
- Delay5Ms();
- }
- void WriteDataLCM(unsigned char WDLCM)
- {
- ReadStatusLCM(); //检测忙
- LCM_Data = WDLCM;
- LCM_RS = 1;
- LCM_RW = 0;
- LCM_E = 0; // 若晶振速度太高可以在这后加小的延时
- LCM_E = 0; // 延时
- LCM_E = 1;
- }
- //写指令
- void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC 为 0 时忽略忙检
- 测
- {
- if (BuysC) ReadStatusLCM(); //根据需要检测忙
- LCM_Data = WCLCM;
- LCM_RS = 0;
- LCM_RW = 0;
- LCM_E = 0;
- LCM_E = 0;
- LCM_E = 1;
- }
- //读数据
- unsigned char ReadDataLCM(void)
- {
- LCM_RS = 1;
- LCM_RW = 1;
- LCM_E = 0;
- LCM_E = 0;
- LCM_E = 1;
- return(LCM_Data);
- }
- //读状态
- unsigned char ReadStatusLCM(void)
- {
- LCM_Data = 0xFF;
- LCM_RS = 0;
- LCM_RW = 1;
- LCM_E = 0;
- LCM_E = 0;
- LCM_E = 1;
- while (LCM_Data & Busy); // 检测忙信号
- return(LCM_Data);
- }
- void LCMInit(void) //LCM 初始化
- {
- LCM_Data = 0;
- WriteCommandLCM(0x38,0); // 三次显示模式设置,不检测忙信号
- Delay5Ms();
- WriteCommandLCM(0x38,0);
- Delay5Ms();
- WriteCommandLCM(0x38,0);
- Delay5Ms();
- WriteCommandLCM(0x38,1); // 显示模式设置 ,开始要求每次检测忙信号
- WriteCommandLCM(0x08,1); // 关闭显示
- WriteCommandLCM(0x01,1); // 显示清屏
- WriteCommandLCM(0x06,1); // 显示光标移动设置
- WriteCommandLCM(0x0C,1); // 显示开及光标设置
- }
- //按指定位置显示一个字符
- void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
- {
- Y &= 0x1;
- X &= 0xF; // 限制 X 不能大于 15,Y 不能大于 1
- if (Y) X |= 0x40; // 当要显示第二行时地址码 0x40;
- X |= 0x80; // 算出指令码
- WriteCommandLCM(X, 0); // 这里不检测忙信号,发送地址码
- WriteDataLCM(DData);
- }
- //按指定位置显示一串字符
- void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
- {
- unsigned char ListLength;
- ListLength = 0;
- Y &= 0x1;
- X &= 0xF; // 限制 X 不能大于 15,Y 不能大于 1
- while (DData[ListLength]>0x20) // 若到达字串尾则退出
- {
- if (X <= 0xF) //X 坐标应小于 0xF
- {
- DisplayOneChar(X, Y, DData[ListLength]); // 显示单个字符
- ListLength++;
- X++;
- }
- }
- }
- //5ms 延时
- void Delay5Ms(void)
- {
- unsigned int TempCyc = 5552;
- while(TempCyc--);
- }
- /*void Delay_xMs(unsigned int x)
- {
- unsigned int i,j;
- for( i =0;i < x;i++ )
- {
- for( j =0;j<500;j++ );
- }
- }
- */
- void display_temp(void)
- {
- DisplayOneChar(0,0,' ');
- DisplayOneChar(1,0,' ');
- DisplayOneChar(2,0,'T');
- DisplayOneChar(3,0,'e');
- DisplayOneChar(4,0,'m');
- DisplayOneChar(5,0,'p');
- DisplayOneChar(6,0,':');
- DisplayOneChar(10,0,'C');
- DisplayOneChar(9,0,0xdf);
- DisplayOneChar(7,0,temp_value/100+0x30);
- DisplayOneChar(8,0,(temp_value/10)-(temp_value/100)*10+0x30);
- DisplayOneChar(11,0,' ');
- DisplayOneChar(12,0,' ');
- DisplayOneChar(13,0,' ');
- DisplayOneChar(14,0,' ');
- DisplayOneChar(15,0,' ');
- DisplayOneChar(0,1,' ');
- DisplayOneChar(1,1,' ');
- DisplayOneChar(2,1,'H');
- DisplayOneChar(3,1,'u');
- DisplayOneChar(4,1,'m');
- DisplayOneChar(5,1,'i');
- DisplayOneChar(6,1,'d');
- DisplayOneChar(7,1,'i');
- DisplayOneChar(8,1,'t');
- DisplayOneChar(9,1,'y');
- DisplayOneChar(10,1,':');
- DisplayOneChar(11,1,humi_value/100+0x30);
- DisplayOneChar(12,1,(humi_value/10)-(humi_value/100)*10+0x30);
- DisplayOneChar(13,1,'%');
- DisplayOneChar(14,1,' ');
- DisplayOneChar(15,1,' ');
- }
- void display_temp1(void)
- {
- DisplayOneChar(0,0,' ');
- DisplayOneChar(1,0,'T');
- DisplayOneChar(2,0,'h');
- DisplayOneChar(3,0,':');
- if(flag&teh)
- {
- DisplayOneChar(4,0,0x20);
- DisplayOneChar(5,0,0x20);
- }
- else
- {
- DisplayOneChar(4,0,temph/10+0x30);
- DisplayOneChar(5,0,temph%10+0x30);
- }
- DisplayOneChar(6,0,0xdf);
- DisplayOneChar(7,0,'C');
- DisplayOneChar(8,0,' ');
- DisplayOneChar(9,0,'T');
- DisplayOneChar(10,0,'h');
- DisplayOneChar(11,0,':');
- if(flag&tel)
- {
- DisplayOneChar(12,0,0x20);
- DisplayOneChar(13,0,0x20);
- }
- else
- {
- DisplayOneChar(12,0,templ/10+0x30);
- DisplayOneChar(13,0,templ%10+0x30);
- }
- DisplayOneChar(14,0,0xdf);
- DisplayOneChar(15,0,'C');
- DisplayOneChar(0,1,' ');
- DisplayOneChar(1,1,'H');
- DisplayOneChar(2,1,'h');
- DisplayOneChar(3,1,':');
- if(flag&hh)
- {
- DisplayOneChar(4,1,0x20);
- DisplayOneChar(5,1,0x20);
- }
- else
- {
- DisplayOneChar(4,1,huih/10+0x30);
- DisplayOneChar(5,1,huih%10+0x30);
- }
- DisplayOneChar(6,1,'%');
- DisplayOneChar(7,1,' ');
- DisplayOneChar(8,1,' ');
- DisplayOneChar(9,1,'H');
- DisplayOneChar(10,1,'l');
- DisplayOneChar(11,1,':');
- if(flag&hl)
- {
- DisplayOneChar(12,1,0x20);
- DisplayOneChar(13,1,0x20);
- }
- else
- {
- DisplayOneChar(12,1,huil/10+0x30);
- DisplayOneChar(13,1,huil%10+0x30);
- }
- DisplayOneChar(14,1,'%');
- DisplayOneChar(15,1,' ');
- }
- void displayfun1()
- {
- display_temp();
- }
- void displayfun2()
- {
- display_temp1();
- }
- void display()
- {
- if((((temp_value/10)%100)<templ)||(((humi_value/10)%100)<huil))
- {beep=0;red=0;} //温度低于下限值,报警
- else if(((temp_value/10)%100)>=temph || ((humi_value/10)%100)>=huih)
- {beep=0;blue=0;} //温度高于或等于上限值,报警
- else {beep=1;red=1;blue=1;}
- // if(((humi_value/10)%100)<huil){beep=0;led=0;} //温度低
- 于下限值,报警
- // else if(((humi_value/10)%100)>=huih)beep=0; //温度高于或等于上限
- 值,报警
- // else {beep=1;led=1;}
- if(!disp_mode)
- displayfun1(); //显示正常
- else
- displayfun2(); //设置界面
- }
- #include "dht11.h"
- #include <reg52.h>
- //请根据自己的 dht11 接的 IO 口来改动位定义
- sbit dht11 = P3^0;
- //防止在与硬件通信时发生死循环的计数范围
- #define NUMBER 20
- #define SIZE 5
- static unsigned char status;
- //存放五字节数据的数组
- static unsigned char value_array[SIZE];
- /*可在其他的文件引用温湿度值 ,实际是温度的整数的 10 倍
- 如 dht11 读回的温度是 26,则 temp_value = 260, 湿度同理 */
- int temp_value, humi_value;
- static unsigned char ReadValue(void);
- void Delay_1ms(unsigned int ms)
- {
- unsigned int x, y;
- for(x = ms; x > 0; x--)
- {
- for(y = 124; y > 0; y--);
- }
- }
- static void DHT11_Delay_10us(void)
- {
- unsigned char i;
- i--;
- i--;
- i--;
- i--;
- i--;
- i--;
- }
- /*读一个字节的数据 */
- static unsigned char DHT11_ReadValue(void)
- {
- unsigned char count, value = 0, i;
- status = OK; //设定标志为正常状态
- for(i = 8; i > 0; i--)
- {
- //高位在先
- value <<= 1;
- count = 0;
- //每一位数据前会有一个 50us 的低电平时间 .等待 50us 低电平结束
- while(dht11 == 0 && count++ < NUMBER);
- if(count >= NUMBER)
- {
- status = ERROR; //设定错误标志
- return 0; //函数执行过程发生错误就退出函数
- }
- //26-28us 的高电平表示该位是 0,为 70us 高电平表该位 1
- DHT11_Delay_10us();
- DHT11_Delay_10us();
- DHT11_Delay_10us();
- //延时 30us 后检测数据线是否还是高电平
- if(dht11 != 0)
- {
- //进入这里表示该位是 1
- value++;
- //等待剩余 (约 40us)的高电平结束
- while(dht11 != 0 && count++ < NUMBER)
- {
- dht11 = 1;
- }
- if(count >= NUMBER)
- {
- status = ERROR; //设定错误标志
- return 0;
- }
- }
- }
- return (value);
- }
- //读温度和湿度函数, 读一次的数据 ,共五字节,读出成功函数返回 OK, 错误返回
- ERROR
- unsigned char DHT11_ReadTempAndHumi(void)
- {
- unsigned char i = 0, check_value = 0,count = 0;
- EA = 0;
- dht11 = 0; //拉低数据线大于 18ms 发送开始信号
- Delay_1ms(20); //需大于 18 毫秒
- dht11 = 1; //释放数据线 ,用于检测低电平的应答信号
- //延时 20-40us,等待一段时间后检测应答信号 ,应答信号是从机拉低数据线
- 80us
- DHT11_Delay_10us();
- DHT11_Delay_10us();
- DHT11_Delay_10us();
- DHT11_Delay_10us();
- if(dht11 != 0) // 检测应答信号 ,应答信号是低电平
- {
- //没应答信号
- EA = 1;
- return ERROR;
- }
- else
- {
- //有应答信号
- while(dht11 == 0 && count++ < NUMBER); // 等待应答信号结束
- if(count >= NUMBER) // 检测计数器是否超过了设定的范围
- {
- dht11 = 1;
- EA = 1;
- return ERROR; //读数据出错 ,退出函数
- }
- count = 0;
- dht11 = 1;//释放数据线
- //应答信号后会有一个 80us 的高电平,等待高电平结束
- while(dht11 != 0 && count++ < NUMBER);
- if(count >= NUMBER)
- {
- dht11 = 1;
- EA = 1;
- return ERROR; //退出函数
- }
- //读出湿 .温度值
- for(i = 0; i < SIZE; i++)
- {
- value_array[i] = DHT11_ReadValue();
- if(status == ERROR)//调用 ReadValue()读数据出错会设定 status 为
- ERROR
- {
- dht11 = 1;
- EA = 1;
- return ERROR;
- }
- //读出的最后一个值是校验值不需加上去
- if(i != SIZE - 1)
- {
- //读出的五字节数据中的前四字节数据和等于第五字节数据表示
- 成功
- check_value += value_array[i];
- }
- }//end for
- //在没用发生函数调用失败时进行校验
- if(check_value == value_array[SIZE - 1])
- {
- //将温湿度扩大 10 倍方便分离出每一位
- humi_value = value_array[0] * 10;
- temp_value = value_array[2] * 10;
- dht11 = 1;
- EA = 1;
- return OK; //正确的读出 dht11 输出的数据
- }
- else
- {
- //校验数据出错
- EA = 1;
- return ERROR;
- }
- }
- }
- #include "lcd1602.h"
- #include "key_contrl.h"
- #include"dht11.h"
- #include <reg52.h>
- int temp;
- int temph = 40; //初始上限值
- int templ = 10; //初始下限值
- int huih = 90;
- int huil =10;
- int timecount,flag=0,number=0,count=0;
- void t0(void) interrupt 1 using 0
- { TH0=(65535-50000)/256; //50ms定时
- TL0=(65535-50000)%256;
- timecount++;//re_disp++;
- if(timecount>9){timecount=0;flag=~flag;} //50ms 到了则反显
- //if(re_disp>200){re_disp=0;if(id)id=0;} //10 秒到了则由调整模式自动进入正
- 常显示模式
- }
- void t1(void) interrupt 3 using 0
- {
- TH1=(65535-50000)/256;//50ms定时
- TL1=(65535-50000)%256;
- number++;
- if(number>2)
- {
- number=0;
- count++;
- //beep=0;
- }
- }
- void main(void)
- {
- TMOD=0x11; //初始化定时器 t0 方式 1
- TH0=(65535-50000)/256;
- TL0=(65535-50000)%256;
- TH1=(65535-50000)/256;
- TL1=(65535-50000)%256;
- EA=1;
- ET0=1;
- ET1=1;
- TR0=1;
- TR1=1;
- LCMInit(); //LCM 初始化
- Delay5Ms(); //延时片刻
- while(1)
- {
- if(count==2)
- {
- DHT11_ReadTempAndHumi();
- count=0;
- }
- delay_LCM(300);
- Scan_Key();
- }
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