基于51单片机的制冷冰箱

/*************************************************************************

    > File Name:bingxiang.c

    > Author: yduo

    > Mail: 1587202069@qq.com 

    > Created Time: 2015

 ************************************************************************/

#include <reg52.h>

#include <intrins.h>

#include <math.h>

#define uchar unsigned char

#define uint unsigned int

sbit RS = P0^7;      //1602

sbit LCDEN = P0^5; 

sbit rw = P0^6;

sbit RELAY_1 = P1^0; //制冷片

sbit RELAY_2 = P1^1;

sbit RELAY_3 = P1^2;

sbit RELAY_4 = P1^3;

sbit RELAY_5 = P1^4;

sbit RELAY_6 = P1^5;

sbit RELAY_7 = P1^6;

sbit RELAY_8 = P1^7;

sbit RELAY_9 = P3^2; //风扇

sbit ds = P3^7;

uint tmp;

uchar table[] = "xian zai wen du:";

/**

*函数声明

*/

void delayUs();

void delayMs(uint a);

void writeComm(uchar comm);

void writeData(uchar dat);

void writeString(uchar * str, uchar length);

void init();

void dsInit();

void Delay1ms()?

void display(int v);

void sendChangeCmd();

int getTmpValue();

void Relay_init();

void Interrupt_init();

void main()

{
Interrupt_init();//中断初始化
Relay_init();
//继电器初始化

    

    sendChangeCmd();

    init();

    writeComm(0x80);

    writeString(table, 16);

    while(1)

    {
delayMs(1000); //温度转换时间需要750ms以上

        writeComm(0xc0);

        display(getTmpValue());

        sendChangeCmd();

    }

}

/**

*微秒延时

*/

void delayUs()

{

    _nop_();

}

/**

*毫秒延时

*/

void delayMs(uint a)

{
while(a--)
{
Delay1ms();
}

}

void Delay1ms() //@11.0592MHz

{
unsigned char i, j;

_nop_();
i = 11;
j = 190;
do
{
while (--j);
} while (--i);

}

void writeComm(uchar comm)

{
RS = 0;    
P2 = comm;
LCDEN = 1;
delayUs();
LCDEN = 0;
delayMs(1);

}

/**

*写数据:RS=1, RW=0;

*/

void writeData(uchar dat)

{
RS = 1;
P2 = dat;
LCDEN = 1;
delayUs();
LCDEN = 0;
delayMs(1);

}

void init()

{
rw=0;
writeComm(0x38);
writeComm(0x0c); 
writeComm(0x06);
writeComm(0x01); 

}

void writeString(uchar * str, uchar length)

{
uchar i;
for(i = 0; i < length; i++)
{
writeData(str[i]);
}

}

 

/**

*DS18B20初始化

*/

 

void dsInit()

{

    
unsigned int i;  
ds = 0;
i = 100;  
while(i>0) i--;
ds = 1;   
i = 4;
while(i>0) i--;

}

 

void dsWait()

{
unsigned int i;
while(ds);  
while(~ds);
i = 4;

while(i > 0)

 i--;

}

bit readBit()

{
unsigned int i;
bit b;
ds = 0;
i++;   
ds = 1; 
i++; 
i++;  
b = ds;
i = 8; 
while(i>0) i--;
return b;

}

unsigned char readByte()

{

    unsigned int i;

    unsigned char j, dat;

    dat = 0;

    for(i=0; i<8; i++)

    {

        j = readBit();

      

        dat = (j << 7) | (dat >> 1);

    }

    return dat;

}

void writeByte(unsigned char dat)

{
unsigned int i;
unsigned char j;
bit b;
for(j = 0; j < 8; j++)
{
b = dat & 0x01;
dat >>= 1;

if(b)   
{
ds = 0;          
i++; 
i++;  
ds = 1;    
i = 8; 
while(i>0) i--;  
}
else  
{
ds = 0;
i = 8; 
while(i>0) i--;  
ds = 1;
i++; 
i++;
}
}

}

void sendChangeCmd()

{

    dsInit();    

    dsWait();   

    delayMs(1);    

    writeByte(0xcc);

    writeByte(0x44);

}

void sendReadCmd()

{

    dsInit();

    dsWait();

    delayMs(1);

    writeByte(0xcc); 

    writeByte(0xbe); 

}

int getTmpValue()

{

    unsigned int tmpvalue;

    int value; 

    float t;

    unsigned char low, high;

    sendReadCmd();

    

    low = readByte(); 

    high = readByte();

   

    tmpvalue = high;

    tmpvalue <<= 8;

    tmpvalue |= low;

    value = tmpvalue;

    

  \

    t = value * 0.0625;

    \

    value = t * 100 + (value > 0 ? 0.5 : -0.5); //大于0加0.5, 小于0减0.5

    return value;

}

/**

* 1602屏幕显示

*/

void display(int v) 

{

    unsigned char count;

    unsigned char datas[] = {0, 0, 0, 0, 0};

    tmp = abs(v);

    datas[0] = tmp / 10000;

    datas[1] = tmp % 10000 / 1000;

    datas[2] = tmp % 1000 / 100;

    datas[3] = tmp % 100 / 10;

    datas[4] = tmp % 10;

    writeComm(0xc0+3);

    if(v < 0)

    {

        writeString("- ", 2);

   }

    else

    {

       writeString("+ ", 2);

    }

    if(datas[0] != 0)

    {

        writeData('0'+datas[0]);

    }

    for(count = 1; count != 5; count++)

    {

        writeData('0'+datas[count]);

        if(count == 2)

        {

            writeData('.');

        }

    }

}

/**

*中断服务函数

*/

void Time1(void) interrupt 3 

{

    TH1=0xd8;               //10ms定时

    TL1=0xf0;

if(tmp > 2000)//2000指的是20° 全开
{
RELAY_1 = 0;
RELAY_2 = 0;
RELAY_3 = 0;
RELAY_4 = 0;
RELAY_5 = 0;
RELAY_6 = 0;
RELAY_7 = 0;
RELAY_8 = 0;
RELAY_9 = 1;
}
else if(tmp < 2000 && tmp > 1500)
{
RELAY_1 = 0;
RELAY_2 = 1;
RELAY_3 = 0;
RELAY_4 = 1;
RELAY_5 = 0;
RELAY_6 = 1;
RELAY_7 = 0;
RELAY_8 = 1;
RELAY_9 = 1;

}  
else
{
Relay_init();
}

}

/**

*继电器初始化

*/

void Relay_init()

{

    RELAY_1 = 1;
RELAY_2 = 1;
RELAY_3 = 1;
RELAY_4 = 1;
RELAY_5 = 1;
RELAY_6 = 1;
RELAY_7 = 1;
RELAY_8 = 1;
RELAY_9 = 1;

}

/**

*中断初始化

*/

void Interrupt_init()

{

    TMOD=0x10;   //定时/计数器1工作于方式1

   

c语言

TH0=0xd8; //定时器初始值

    TL0=0xf0;    //10ms定时常数

    EA=1;        //开总中断

    ET1=1;       //允许定时/计数器1 中断

    TR1=1;       //启动定时/计数器1 中断

}