基于51单片机的制冷冰箱

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

    > File Name:bingxiang.c
    > Author: yduo
    > Mail: [e-mail] 
    > 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
}