Intelligent temperature control system

Single chip microcomputer reading DS18B20 The temperature is displayed on the LCD1602 On , When the temperature is higher than 30℃ Less than 35℃ The buzzer makes a sound , When the temperature is higher than 35℃ When the motor rotates

DS18b20 Single bus digital thermometer , Buzzer module low level active , For motor （L298N） drive , If you don't understand, you can read the motor drive I wrote before (L298) Their usage is the same

The main function

#include <REGX52.H>
#include "LCD1602.h"
#include "DS18B20.h"
#include "MOTOR.h"
#include "Delay.h"
sbit BEEP=P1^5;
int i=0;
float T;

void main()
{
	DS18B20_ConvertT();		
	Delay(1000);		
	LCD_Init();
	LCD_ShowString(1,1,"Temperature:");
	while(1)
	{
		DS18B20_ConvertT();	
		T=DS18B20_ReadT();	
		if(T<0)			
		{
			LCD_ShowChar(2,1,'-');	
			T=-T;		
		}
		else			
		{
			LCD_ShowChar(2,1,'+');	
		}
		LCD_ShowNum(2,2,T,3);		
		LCD_ShowChar(2,5,'.');		
		LCD_ShowNum(2,6,(unsigned long)(T*10000)%10000,4);
		if(T<30)
		{
			i=0;		
		}
		while(T>30&&T<35)
		{
			BEEP=i;
			i=1;
			Delay(1000);
			BEEP=1;
			break;
		}
		while(T>35)
		{
			BEEP=0;
			MOTOR();
			break;
		}
		if(T<35)
		{
		MOTOR_step();
		}
	}
}

Single bus transceiver data function （ By a station up The main reference can be written together with temperature conversion ）

#include <REGX52.H>

// Pin definition 
sbit OneWire_DQ=P3^7;

//  Single bus initialization 

unsigned char OneWire_Init(void)
{
	unsigned char i;
	unsigned char AckBit;
	OneWire_DQ=1;
	OneWire_DQ=0;
	i = 247;while (--i);		//Delay 500us
	OneWire_DQ=1;
	i = 32;while (--i);			//Delay 70us
	AckBit=OneWire_DQ;
	i = 247;while (--i);		//Delay 500us
	return AckBit;
}

// Single bus sends one bit 

void OneWire_SendBit(unsigned char Bit)
{
	unsigned char i;
	OneWire_DQ=0;
	i = 4;while (--i);			//Delay 10us
	OneWire_DQ=Bit;
	i = 24;while (--i);			//Delay 50us
	OneWire_DQ=1;
}

// Single bus receives one bit 

unsigned char OneWire_ReceiveBit(void)
{
	unsigned char i;
	unsigned char Bit;
	OneWire_DQ=0;
	i = 2;while (--i);			//Delay 5us
	OneWire_DQ=1;
	i = 2;while (--i);			//Delay 5us
	Bit=OneWire_DQ;
	i = 24;while (--i);			//Delay 50us
	return Bit;
}


//   Single bus sends a byte 

void OneWire_SendByte(unsigned char Byte)
{
	unsigned char i;
	for(i=0;i<8;i++)
	{
		OneWire_SendBit(Byte&(0x01<<i));
	}
}


//  One byte received 

unsigned char OneWire_ReceiveByte(void)
{
	unsigned char i;
	unsigned char Byte=0x00;
	for(i=0;i<8;i++)
	{
		if(OneWire_ReceiveBit()){Byte|=(0x01<<i);}
	}
	return Byte;
}

DS18b20 Temperature conversion

#include <REGX52.H>
#include "OneWire.h"

#define DS18B20_SKIP_ROM			0xCC
#define DS18B20_CONVERT_T			0x44
#define DS18B20_READ_SCRATCHPAD 	0xBE

// Temperature conversion 
void DS18B20_ConvertT(void)
{
	OneWire_Init();
	OneWire_SendByte(DS18B20_SKIP_ROM);
	OneWire_SendByte(DS18B20_CONVERT_T);
}

// Extraction temperature 
float DS18B20_ReadT(void)
{
	unsigned char TLSB,TMSB;
	int Temp;
	float T;
	OneWire_Init();
	OneWire_SendByte(DS18B20_SKIP_ROM);
	OneWire_SendByte(DS18B20_READ_SCRATCHPAD);
	TLSB=OneWire_ReceiveByte();
	TMSB=OneWire_ReceiveByte();
	Temp=(TMSB<<8)|TLSB;
	T=Temp/16.0;// Equivalent to temperature *0.0625
	return T;
}

LCD Display driver function

#include <REGX52.H>

// Pin configuration ：
sbit LCD_RS=P3^5;
sbit LCD_RW=P3^4;
sbit LCD_EN=P3^6;
#define LCD_DataPort P2

// Function definition ：
/**
  * @brief  LCD1602 The time delay function ,12MHz Call can be delayed 1ms
  * @param   nothing 
  * @retval  nothing 
  */
void LCD_Delay()
{
	unsigned char i, j;

	i = 2;
	j = 239;
	do
	{
		while (--j);
	} while (--i);
}

/**
  * @brief  LCD1602 Write orders 
  * @param  Command  Command to write 
  * @retval  nothing 
  */
void LCD_WriteCommand(unsigned char Command)
{
	LCD_RS=0;
	LCD_RW=0;
	LCD_DataPort=Command;
	LCD_EN=1;
	LCD_Delay();
	LCD_EN=0;
	LCD_Delay();
}

/**
  * @brief  LCD1602 Writing data 
  * @param  Data  The data to be written 
  * @retval  nothing 
  */
void LCD_WriteData(unsigned char Data)
{
	LCD_RS=1;
	LCD_RW=0;
	LCD_DataPort=Data;
	LCD_EN=1;
	LCD_Delay();
	LCD_EN=0;
	LCD_Delay();
}

/**
  * @brief  LCD1602 Set cursor position 
  * @param  Line  Row position , Range ：1~2
  * @param  Column  Column position , Range ：1~16
  * @retval  nothing 
  */
void LCD_SetCursor(unsigned char Line,unsigned char Column)
{
	if(Line==1)
	{
		LCD_WriteCommand(0x80|(Column-1));
	}
	else if(Line==2)
	{
		LCD_WriteCommand(0x80|(Column-1+0x40));
	}
}

/**
  * @brief  LCD1602 Initialization function 
  * @param   nothing 
  * @retval  nothing 
  */
void LCD_Init()
{
	LCD_WriteCommand(0x38);// Eight bit data interface , Two lines show ,5*7 Lattice 
	LCD_WriteCommand(0x0c);// Show on , The cursor is off , Flashing off 
	LCD_WriteCommand(0x06);// After data reading and writing , The cursor automatically adds one , The picture doesn't move 
	LCD_WriteCommand(0x01);// Cursor reset , Clear the screen 
}

/**
  * @brief   stay LCD1602 Display a character at the specified position 
  * @param  Line  Row position , Range ：1~2
  * @param  Column  Column position , Range ：1~16
  * @param  Char  Characters to display 
  * @retval  nothing 
  */
void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char)
{
	LCD_SetCursor(Line,Column);
	LCD_WriteData(Char);
}

/**
  * @brief   stay LCD1602 Start displaying the given string at the specified position 
  * @param  Line  Start line position , Range ：1~2
  * @param  Column  Start column position , Range ：1~16
  * @param  String  String to display 
  * @retval  nothing 
  */
void LCD_ShowString(unsigned char Line,unsigned char Column,char *String)
{
	unsigned char i;
	LCD_SetCursor(Line,Column);
	for(i=0;String[i]!='\0';i++)
	{
		LCD_WriteData(String[i]);
	}
}

/**
  * @brief   Return value =X Of Y Power 
  */
int LCD_Pow(int X,int Y)
{
	unsigned char i;
	int Result=1;
	for(i=0;i<Y;i++)
	{
		Result*=X;
	}
	return Result;
}

/**
  * @brief   stay LCD1602 Start displaying the given number at the specified position 
  * @param  Line  Start line position , Range ：1~2
  * @param  Column  Start column position , Range ：1~16
  * @param  Number  Number to display , Range ：0~65535
  * @param  Length  The length of the number to display , Range ：1~5
  * @retval  nothing 
  */
void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
	unsigned char i;
	LCD_SetCursor(Line,Column);
	for(i=Length;i>0;i--)
	{
		LCD_WriteData(Number/LCD_Pow(10,i-1)%10+'0');
	}
}

/**
  * @brief   stay LCD1602 Displays the given number in signed decimal starting at the specified position 
  * @param  Line  Start line position , Range ：1~2
  * @param  Column  Start column position , Range ：1~16
  * @param  Number  Number to display , Range ：-32768~32767
  * @param  Length  The length of the number to display , Range ：1~5
  * @retval  nothing 
  */
void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length)
{
	unsigned char i;
	unsigned int Number1;
	LCD_SetCursor(Line,Column);
	if(Number>=0)
	{
		LCD_WriteData('+');
		Number1=Number;
	}
	else
	{
		LCD_WriteData('-');
		Number1=-Number;
	}
	for(i=Length;i>0;i--)
	{
		LCD_WriteData(Number1/LCD_Pow(10,i-1)%10+'0');
	}
}

/**
  * @brief   stay LCD1602 The given number is displayed in hexadecimal from the specified position 
  * @param  Line  Start line position , Range ：1~2
  * @param  Column  Start column position , Range ：1~16
  * @param  Number  Number to display , Range ：0~0xFFFF
  * @param  Length  The length of the number to display , Range ：1~4
  * @retval  nothing 
  */
void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
	unsigned char i,SingleNumber;
	LCD_SetCursor(Line,Column);
	for(i=Length;i>0;i--)
	{
		SingleNumber=Number/LCD_Pow(16,i-1)%16;
		if(SingleNumber<10)
		{
			LCD_WriteData(SingleNumber+'0');
		}
		else
		{
			LCD_WriteData(SingleNumber-10+'A');
		}
	}
}

/**
  * @brief   stay LCD1602 The given number is displayed in binary from the specified position 
  * @param  Line  Start line position , Range ：1~2
  * @param  Column  Start column position , Range ：1~16
  * @param  Number  Number to display , Range ：0~1111 1111 1111 1111
  * @param  Length  The length of the number to display , Range ：1~16
  * @retval  nothing 
  */
void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{
	unsigned char i;
	LCD_SetCursor(Line,Column);
	for(i=Length;i>0;i--)
	{
		LCD_WriteData(Number/LCD_Pow(2,i-1)%2+'0');
	}
}

Motor drive function （ A simpler way to use ） You can add a timer by yourself pwm Number adjustment function

#include <REGX52.H>
sbit EB=P1^0;
sbit L1=P1^1;
sbit L2=P1^2;
void MOTOR_step()
{
	EB=0;
}
void MOTOR()	
{
	EB=1;
	L1=1;
	L2=0;
}

I have to say this up The Lord is really powerful , The object made before was later dismantled , There are no pictures now