新建 文本文档.txt

电烤箱程序加原理图

#include<reg52.h>
#define ti 0.07
#define td 40
#define kp 12.3
#define uint unsigned int
#define uchar unsigned char
sbit welage=P1^0;  //个位位选定义
sbit welashi=P1^1; //十位位选定义
sbit welabai=P1^2; //百位位选定义
sbit keyge=P2^3;   //个位键定义
sbit keyshi=P2^4;  //十位键定义
sbit keybai=P2^5;  //百位键定义
sbit set=P2^6;     //设定键定义
sbit start=P2^7;   //启动键设定
sbit eoc=P1^3;     //转换结束信号端设定，为高时转换结束
sbit clk=P1^4;     //输入时钟端设定
sbit din=P1^5;     //控制字写入端设定
sbit out=P1^6;		//AD输出端设定
sbit cs=P1^7;
sbit speaker=P2^0;
sbit led=P2^1;
sbit heat=P2^3;
uchar code table[10]={0x3f  , 0x06 , 0x5b , 0x4f , 0x66 , 
0x6d ,0x7d , 0x07 , 0x7f  , 0x6f  
};
uchar code tablex[10]={
	0,1,2,3,4,
	5,6,7,8,9
};
uchar code tablepow[12]={
	1,2,4,8,16,32,64,128,
	256,512,1024,2048
};
uchar ge,shi,bai;
uchar tmp;//tmp为实际温度值
uchar tmpset;//tmpset为设定温度值
uchar adc[12];
uchar startadc;
uchar setkey;
void delay(uchar z)		//延时程序
{ uchar x,y;
  for(x=z;x>0;x--)
    for(y=110;y>0;y--);
}
/*void keyboardset()              //键盘设定函数
{   uchar numge,numshi,numbai;
    numge=0;                    //初始化
	numshi=0;
	numbai=0;
	while(1)
	{   
		welage=0;               //动态显示当前的设定值
	   P0=table[numge];
		delay(10);
		welage=1;
		welashi=0;
		P0=table[numshi];
		delay(10);
		welashi=1;
		welabai=0;
		P0=table[numbai];
		delay(10);
		welabai=1;
		tmpset=tablex[numbai]*100+tablex[numshi]*10+tablex[numge];
		if (keyge==0)              //个位键按下时开始动作
		{
			delay(10);             //消抖
			if (keyge==0)
			{
           welashi=1;        //关闭十位位选
			  welabai=1;        //关闭百位位选
			  P0=table[numge];
              numge++;
			  if(numge==10)
				 numge=0;
      	}
			while(!keyge);          //检测松键盘
			delay(10);
			while(!keyge);
		} 
		else if(keyshi==0)         //十位键按下时开始动作
		{
			delay(10);
			if (keyshi==0);
			{
				welage=1;       //关闭个位位选
				welabai=1;      //关闭百位位选
				P0=table[numshi];
				   numshi++;
				if(numshi==10)
					numshi=0;
			}
			while(!keyshi);          //检测松键盘
			delay(10);
			while(!keyshi);
		}
		else if(keybai==0)
		{
			delay(10);
			if (keybai==0);
			{
				welage=1;     //关闭个位位选
				welashi=1;    //关闭十位位选
				P0=table[numbai];
				  numbai++;
				if(numbai==10)
					numbai=0;
			}
			while(!keybai);
			delay(10);
			while(!keybai);
		}
   	}
}*/
uint tmpconvert()                               //实际温度值转换程序
{
	uchar i,c,b,a,d,result;//a为标度变化系数，当电压值变化1v时，温度变化为a摄氏度
	c=0;
	b=0;
	result=0;
	a=0.2;  //待测量
	for (i=0;i<12;i++) 
		{ 
			d=11-i;
			b=adc[i]*tablepow[d]; 
			c=c+b; 
		}
	result=(4095-c)*0.5;
	return (result);
		
}
void display(uchar shu) //动态显示十进制数
{
	uchar a,b,c;
	a=shu/100;
	b=shu%100/10;
	c=shu%10;
	welage=0;               
  	P0=table[c];
	delay(1);
	welage=1;
	welashi=0;
	P0=table[b];
	delay(1);
	welashi=1;
	welabai=0;
	P0=table[a];
	delay(1);
	welabai=1;
}
void read_bit()   //当开始键按下，就开始调用
{
	uchar count1,count2;
	//cs=1;
	cs=0;
	for(count2=0;count2<12;count2++)//写入控制字
	{
		clk=0;
		din=0;
		clk=1;
	}	
	//while(eoc==1)    //转换完成后开始,12个时钟周期后eoc为0            
	//{
		for(count1=0;count1<12;count1++)  //将ad数据存入数组中
		{
			
	      adc[count1]=out;
			
			//din=0;           //将下次转换需要的控制字写入，转换后高位先送出
			clk=1;
			clk=0;
		}
	//}
	cs=1;//eoc为0后将cs置高，开始转换过程
		tmp=tmpconvert();

		
}
uint pid(uchar setv)
{
	uchar tempdx,tempdx1,tempdx2;
	tempdx=tempdx1=tempdx2=0;
	tempdx = setv - tmp;
	if(tempdx>0)
	{	
 	tempdx2 = tempdx2 + tempdx;
    	out = kp * Tempdx + Tempdx2 / ti + td * (Tempdx - Tempdx1);
 	Tempdx1 = Tempdx;
	led=0;
       	return out;
	}
	else if(tempdx<0)
	{
		return 0;
		speaker=0;
		delay(10);
		speaker=1
	}
}

void main()
{
	if (set==0)
	{
		delay(10);
		if(set==0)
		{
			setkey=1;
			startadc=0;	
		}
		while(!set);
		delay(10);
		while(!set);
	}
	while(setkey==1)
	{
		keyboardset();
	}
	if (start==0)   //放入主程序中，做判断
	{
		delay(10);
		if(start==0)
		{
			
			din=0;
			clk=0;
			cs=1;
			startadc=1;
			//eoc=1;
			setkey=0;//AD转换开始后，终止键盘设定
		}
		while(!start);//不松键盘，择程序停留此处不向下执行
		delay(10);
		while(!start);
	}
	while (startadc==1)             
	{
		read_bit();
		heatsec=pid(tmpset);
		heat=1;
		delay(heatsec);
		heat=0;
		
	}	
}