51单片机-51单片机温湿度数据管理系统

51单片机温湿度数据管理系统

1.硬件准备

开发板：51单片机 显示：lcd1602 温湿度模块：DHT11 通信模块：HC-08蓝牙

2.代码实现

uart.c

#include "reg52.h"
#include "config.h"
#include <string.h>

sfr AUXR = 0x8E;
sbit D6 = P3^6;
char buffer[12];

void UartInit(void)		//9600bps@11.0592MHz
{
    
	AUXR = 0x01;
	SCON = 0x50; //配置串口工作方式1，REN使能接收
	TMOD &= 0xF0;
	TMOD |= 0x20;//定时器1工作方式位8位自动重装
	
	TH1 = 0xFD;
	TL1 = 0xFD;//9600波特率的初值
	TR1 = 1;//启动定时器
	
	EA = 1;//开启总中断
	ES = 1;//开启串口中断
}
void sendByte(char data_msg)
{
    
	SBUF = data_msg;
	while(!TI);
	TI = 0;
}

void sendString(char* str)
{
    
	while( *str != '\0'){
    
		sendByte(*str);
		str++;
	}
}

void Uart_Handler() interrupt 4
{
    
	char tmp;
	char i;
	
	if(RI)//中断处理函数中，对于接收中断的响应
	{
    
			RI = 0;//清除接收中断标志位
			tmp = SBUF;
		
			if(tmp == ':'){
    
				i = 0;
			}
			buffer[i++] = tmp;
			
			if(buffer[0] == ':' && buffer[1] =='o' && buffer[2] == 'p'){
    
				fengshan = 0;
				memset(buffer,'\0',12);
				
			}
			if(buffer[0] == ':' && buffer[1] == 'c' && buffer[2] == 'l'){
    
				fengshan = 1;
				D6 = 0;
				Delay1000ms();
				Delay1000ms();
				memset(buffer,'\0',12);
			}
	}
		
	if(TI);
}

uart.h

#ifndef _UART_H
#define _UART_H

void UartInit(void);		//9600bps@11.0592MHz

void sendByte(char data_msg);


void sendString(char* str);

#endif

lcd1602.c

#include "reg52.h"
#include "intrins.h"
#include "delay.h"

#define databuffer  P0 //定义8位数据线，Po端口组
sbit RS = P1^0;
sbit RW = P1^1;
sbit EN = P1^4;


void check_busy()
{
    
	char tmp = 0x80;
	databuffer = 0x80;
	
	while(tmp & 0x80){
    //1000 0000
		RS = 0;
		RW = 1;
		EN = 0;
		_nop_();
		EN = 1;
		_nop_();
		_nop_();
		tmp = databuffer;
		EN = 0;
		_nop_();
	}
}

void Write_Cmd_Func(char cmd)
{
    
	check_busy();
	RS = 0;
	RW = 0;
	
	EN = 0;
	_nop_();
	databuffer = cmd;
	_nop_();
	EN = 1;
	_nop_();
	_nop_();
	EN = 0;
	_nop_();	
}

void Write_Data_Func(char dataShow)
{
    
	check_busy();
	RS = 1;
	RW = 0;
	
	EN = 0;
	_nop_();
	databuffer = dataShow;
	_nop_();
	EN = 1;
	_nop_();
	_nop_();
	EN = 0;
	_nop_();	
}


void LCD1602_INIT()
{
    
	//（1）延时 15ms
	Delay15ms();
//（2）写指令 38H(不检测忙信号) 
	Write_Cmd_Func(0x38);
//（3）延时 5ms
	Delay5ms();
//（4）以后每次写指令，读/写数据操作均需要检测忙信号
//（5）写指令 38H：显示模式设置
	Write_Cmd_Func(0x38);
//（6）写指令 08H：显示关闭
	Write_Cmd_Func(0x08);
//（7）写指令 01H：显示清屏
	Write_Cmd_Func(0x01);
//（8）写指令 06H：显示光标移动设置
	Write_Cmd_Func(0x06);
//（9）写指令 0CH：显示开及光标设置}
	Write_Cmd_Func(0x0c);
}


void LCD1602_showLine(char row, char col, char *string)
{
    
	
	switch(row){
    

		case 1:
				Write_Cmd_Func(0x80+col);
				while(*string){
    
					Write_Data_Func(*string);
					string++;
				}
				break;
		
		case 2:
				Write_Cmd_Func(0x80+0x40+col);
				while(*string){
    
					Write_Data_Func(*string);
					string++;
				}
				break;
	
	}
}

lcd1602.h

#ifndef _LCD1602_H
#define _LCD1602_H

void LCD1602_INIT();

void LCD1602_showLine(char row, char col, char *string);

#endif

dht11.c

#include "reg52.h"
#include "delay.h"

sbit dht = P3^3;//模块的data插在p3.3

char datas[5];

void DHT11_Start()
{
    
	dht = 1;
	dht = 0;
	//延时30ms
	Delay30ms();
	dht = 1;
	//卡d点；while(dht1); 卡e点 while(!dht) 卡f点：while(dht)
	while(dht);
	while(!dht);
	while(dht);
}

void Read_Data_From_DHT()
{
    
	int i;//轮
	int j;//每一轮读多少次
	char tmp;
	char flag;
	
	DHT11_Start();
	for(i= 0;i < 5;i++){
    
		//卡g点：while(!dht)       有效数据都是高电平，持续时间不一样，50us读，低电平0 高电平
		for(j=0;j<8;j++){
    
			while(!dht);//等待卡g点
			Delay40us();
			if(dht == 1){
    
				flag = 1;
				while(dht);
			}else{
    
				flag = 0;
			} 
			tmp = tmp << 1;
			tmp |= flag;
		}
		datas[i] = tmp;
	}

}

dht11.h

#ifdenf _DHT11_H
#define _DHT11_H

void Read_Data_From_DHT();

#endif

delay.c

#include "intrins.h"
void Delay30ms()		//@11.0592MHz
{
    
	unsigned char i, j;

	i = 54;
	j = 199;
	do
	{
    
		while (--j);
	} while (--i);
}



void Delay40us()		//@11.0592MHz
{
    
	unsigned char i;

	_nop_();
	i = 15;
	while (--i);
}


void Delay1000ms()		//@11.0592MHz
{
    
	unsigned char i, j, k;

	_nop_();
	i = 8;
	j = 1;
	k = 243;
	do
	{
    
		do
		{
    
			while (--k);
		} while (--j);
	} while (--i);
}

void Delay15ms()		//@11.0592MHz
{
    
	unsigned char i, j;

	i = 27;
	j = 226;
	do
	{
    
		while (--j);
	} while (--i);
}
void Delay5ms()		//@11.0592MHz
{
    
	unsigned char i, j;

	i = 9;
	j = 244;
	do
	{
    
		while (--j);
	} while (--i);
}

delay.h

#ifndef _DELAY_H
#define _DELAY_H

#include "intrins.h"
void Delay30ms();		//@11.0592MHz

void Delay40us();		//@11.0592MHz

void Delay1000ms();		//@11.0592MHz

void Delay15ms();		//@11.0592MHz

void Delay5ms();		//@11.0592MHz

#endif

config.h

#ifndef _CONFIG_H
#define _CONFIG_H

sbit ledOne = P3^7;
sbit fengshan = P1^6;

#endif

main.c

#include "reg52.h"
#include "intrins.h"
#include "delay.h"
#include "lcd1602.h"
#include "uart.h"
#include "dht11.h"
#include "config.h"


char temp[8];
char huma[8];
extern char datas[5];

void Build_Datas()
{
    
	huma[0] = 'H';
	huma[1] = datas[0]/10 + 0x30;
	huma[2] = datas[0]%10 + 0x30;
	huma[3] = '.';
	huma[4] = datas[1]/10 + 0x30;
	huma[5] = datas[1]%10 + 0x30;
	huma[6] = '%';
	huma[7] = '\0';
	
	temp[0] = 'T';
	temp[1] = datas[2]/10 + 0x30;
	temp[2] = datas[2]%10 + 0x30;
	temp[3] = '.';
	temp[4] = datas[3]/10 + 0x30;
	temp[5] = datas[3]%10 + 0x30;
	temp[6] = 'C';
	temp[7] = '\0';
	
}

void main()
{
    
	
	Delay1000ms();
	UartInit();
	LCD1602_INIT();
	Delay1000ms();
	Delay1000ms();
	ledOne = 0;
	while(1){
    
		Delay1000ms();
		Read_Data_From_DHT();	
		if(datas[2] >= 24){
    
			fengshan = 0;
		}else{
    
			fengshan = 1;
		}
		Build_Datas();
		sendString(huma);
		sendString("\r\n");
		sendString(temp);
		sendString("\r\n");
		LCD1602_showLine(1,2,huma);
		LCD1602_showLine(2,2,temp);
	}
}