//****************************************************************//
//单片机 : STC89C52RC
// 功能 :串口发送温湿度数据 晶振 11.0592M 波特率 9600
//硬件连接: P2.0口为通讯口连接DHT11,DHT11的电源和地连接单片机的电源和地,单片机串口加MAX232连接电脑
//****************************************************************//
#include <reg51.h>
#include <intrins.h>
#include <absacc.h>
typedef unsigned char U8; /* defined for unsigned 8-bits integer variable 无符号8位整型变量 */
typedef unsigned int U16; /* defined for unsigned 16-bits integer variable 无符号16位整型变量 */
#define lcd_H
#include <reg51.h>
#define HIGH 1
#define LOW 0
#define TRUE 1
#define FALSE 0
#define ZERO 0
#define MSB 0x80
#define LSB 0x01
//********液晶屏部分 ****
#define LINE1 0
#define LINE2 1
#define LINE1_HEAD 0x80
#define LINE2_HEAD 0xC0
#define DATA_MODE 0x38
#define OPEN_SCREEN 0x0C
#define DISPLAY_ADDRESS 0x80
#define CLEARSCREEN LCD_en_com(0x01)
#define LCDIO P1
sbit LCD1602_RS = P2^4; //定义端口
sbit LCD1602_RW = P2^3;
sbit LCD1602_EN = P2^2;
//----------------------------------------------//
//----------------IO口定义区--------------------//
//----------------------------------------------//
sbit P2_0 = P2^0 ;
sbit SPK=P0^7;
int t1,t2,ss;
//----------------------------------------------//
//----------------定义区--------------------//
//----------------------------------------------//
U8 U8FLAG;
U8 U8count,U8temp;
U8 U8T_data_H,U8T_data_L,U8RH_data_H,U8RH_data_L,U8checkdata;
U8 U8T_data_H_temp,U8T_data_L_temp,U8RH_data_H_temp,U8RH_data_L_temp,U8checkdata_temp;
U8 U8comdata;
unsigned char str1[]={'s','h','i','d','u',':'};
unsigned char str2[]={'w','e','n','d','u',':'};
LCD_init();
void Delay(U16 j)
{ U8 i;
for(;j>0;j--)
{
for(i=0;i<27;i++);
}
}
void Delay_10us(void)
{
U8 i;
i--;
i--;
i--;
i--;
i--;
i--;
}
void COM(void)
{
U8 i;
for(i=0;i<8;i++)
{
U8FLAG=2;
while((!P2_0)&&U8FLAG++);
Delay_10us();
Delay_10us();
Delay_10us();
U8temp=0;
if(P2_0)U8temp=1;
U8FLAG=2;
while((P2_0)&&U8FLAG++);
//超时则跳出for循环
if(U8FLAG==1)break;
//判断数据位是0还是1
// 如果高电平高过预定0高电平值则数据位为 1
U8comdata<<=1;
U8comdata|=U8temp; //0
}//rof
}
void LCD_Read_BF(void)
{
unsigned char read=0;
LCD1602_RS=LOW;
LCD1602_RW=HIGH;
LCD1602_EN=HIGH;
LCDIO=0XFF;
read=LCDIO;}
void LCD_en_com(unsigned char command)//写指令
{
LCD_Read_BF();
LCD1602_RS=LOW;
LCD1602_RW=LOW;
LCD1602_EN=HIGH;
LCDIO=command;
LCD1602_EN=LOW;
}
void LCD_en_dat(unsigned char dat)//写数据
{
LCD_Read_BF();
LCD1602_RS=HIGH;
LCD1602_RW=LOW;
LCD1602_EN=HIGH;
LCDIO=dat;
LCD1602_EN=LOW;
}
void LCD_set_xy(unsigned char x,unsigned char y) //写入地址函数
{
unsigned char address;
if(y==LINE1)
address=LINE1_HEAD+x;
else address=LINE2_HEAD+x;
LCD_en_com(address);
}
void LCD_write_char(unsigned char x,unsigned char y,unsigned char dat)//写入字符函数
{
LCD_set_xy(x,y);
LCD_en_dat(dat);
}
void LCD_write_string(unsigned char x,unsigned char y,unsigned char *s)//写入字符串函数
{
LCD_set_xy(x,y);
while(*s)
{
LCDIO=*s;
LCD_en_dat(*s);
s++;
}
}
void LCD_Init(void) //初始化函数
{
LCD_en_com(0x38); /*显示模式设置*/
Delay(5);
LCD_en_com(0x38);
Delay(5);
LCD_en_com(0x38);
Delay(5);
LCD_en_com(0x38);
LCD_en_com(0x08); /*显示关闭*/
LCD_en_com(0x01); /*显示清屏*/
LCD_en_com(0x06); /*显示光标移动设置*/
Delay(5);
LCD_en_com(0x0C); /*显示开及光标设置*/
}
//--------------------------------
//-----湿度读取子程序 ------------
//--------------------------------
//----以下变量均为全局变量--------
//----温度高8位== U8T_data_H------
//----温度低8位== U8T_data_L------
//----湿度高8位== U8RH_data_H-----
//----湿度低8位== U8RH_data_L-----
//----校验 8位 == U8checkdata-----
//----调用相关子程序如下----------
//---- Delay();, Delay_10us();,COM();
//--------------------------------
void RH(void)
{
//主机拉低18ms
P2_0=0;
Delay(180);
P2_0=1;
//总线由上拉电阻拉高 主机延时20us
Delay_10us();
Delay_10us();
Delay_10us();
Delay_10us();
//主机设为输入 判断从机响应信号
P2_0=1;
//判断从机是否有低电平响应信号 如不响应则跳出,响应则向下运行
if(!P2_0) //T !
{
U8FLAG=2;
//判断从机是否发出 80us 的低电平响应信号是否结束
while((!P2_0)&&U8FLAG++);
U8FLAG=2;
//判断从机是否发出 80us 的高电平,如发出则进入数据接收状态
while((P2_0)&&U8FLAG++);
//数据接收状态
COM();
U8RH_data_H_temp=U8comdata;
COM();
U8RH_data_L_temp=U8comdata;
COM();
U8T_data_H_temp=U8comdata;
COM();
U8T_data_L_temp=U8comdata;
COM();
U8checkdata_temp=U8comdata;
P2_0=1;
//数据校验
U8temp=(U8T_data_H_temp+U8T_data_L_temp+U8RH_data_H_temp+U8RH_data_L_temp);
if(U8temp==U8checkdata_temp)
{
U8RH_data_H=U8RH_data_H_temp;
U8RH_data_L=U8RH_data_L_temp;
U8T_data_H=U8T_data_H_temp;
U8T_data_L=U8T_data_L_temp;
U8checkdata=U8checkdata_temp;
}
//湿度整数部分
str1[6] = (char)(0X30+U8RH_data_H/10);
str1[7] = (char)(0X30+U8RH_data_H%10);
//湿度小数部分
str1[9] = (char)(0X30+U8RH_data_L/10);
//温度整数部分
str2[6] = (char)(0X30+U8T_data_H/10);
str2[7] = (char)(0X30+U8T_data_H%10);
//温度小数部分
str2[9] = (char)(0X30+U8T_data_L/10);
t1=(int)(0X30+U8T_data_H/10);
t2=(int)(0X30+U8T_data_H%10);
ss=t1*10+t2;
}
}
void xianshi(void)
{
LCD_write_char(0x00,0,'s');
LCD_write_char(0x01,0,'h');
LCD_write_char(0x02,0,'i');
LCD_write_char(0x03,0,'d');
LCD_write_char(0x04,0,'u');
LCD_write_char(0x05,0,':');
LCD_write_char(0x06,0,str1[6]);
LCD_write_char(0x07,0,str1[7]);
LCD_write_char(0x08,0,'.');
LCD_write_char(0x09,0,str1[9]);
LCD_write_char(0x0B,0,'%');
LCD_write_char(0x0C,0,'R');
LCD_write_char(0x0D,0,'H');
LCD_write_char(0x00,1,'w');
LCD_write_char(0x01,1,'e');
LCD_write_char(0x02,1,'n');
LCD_write_char(0x03,1,'d');
LCD_write_char(0x04,1,'u');
LCD_write_char(0x05,1,':');
LCD_write_char(0x06,1,str2[6]);
LCD_write_char(0x07,1,str2[7]);
LCD_write_char(0x08,1,'.');
LCD_write_char(0x09,1,str1[9]);
LCD_write_char(0x0B,1,0x27);
LCD_write_char(0x0C,1,'C');
}
//**蜂鸣器**//
void laba()
{
unsigned int i;
if(ss>554||ss<500)
{
for(i=0;i<200;i++)//喇叭发声的时间循环,改变大小可以改变发声时间长短
{
Delay(160); //参数决定发声的频率,估算值,可以自行更改参数并
SPK=!SPK;
}
SPK=1;
Delay(60000);
}
//喇叭停止工作,间歇的时间,可更改
}
//----------------------------------------------
//main()功能描述: AT89C51 11.0592MHz 串口发
//送温湿度数据,波特率 9600
//----------------------------------------------
void main()
{
LCD_init();
Delay(4);
while(1)
{
//调用温湿度读取子程序
RH();
xianshi();
laba();
}
}
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