ad.c

热敏电阻

#include<reg51.h>
#include"LCD.h"
#define uchar unsigned char
#define uint unsigned int
#define N 10
uchar bai,ge,shi,n;
uint temp,tp;temph,templ;
uint code ad_date[]={ 
	1060,1060,1060,1100,1120,1140,1166,1180,1200,1220,
	1240,1320,1340,1360,1380,1400,1420,1440,1460,1480,
	1500,1520,1540,1560,1580,1600,1620,1640,1660,1680,
	1700,1720,1740,1760,1780,1800,1820,1840,1840,1860,
	1880,1900,1920,1940,1960,1980,2000,2020,2040,2060,
	2080,2100,2120,2140,2160,2180,2200,2220,2240,2260,
	2280,2300,2320,2340,2360,2380,2400,2420,2440,2460,
	2480,2500,2520,2540,2560,2580,2600,2620,2640,2660,
	2680,2700,2720,2740,2760,2780,2800,2820,2840,2860,
	2880,2900,2920,2920,2940,2960,2980,3000,3020,3040,
	3060,3080,3100,3120,3140,3160,3180,3200,3220,3240,
	3260,3280,3300,3320,3340,3360,3380,3400,3420,3440,
	3460,3480,3500,3520,3540,3560,3580,3600,3620,3640,
	3660,3680};
uint code temperiture[]={
	594,593,586,580,579,560,564,559,552,545,
	541,518,513,508,503,497,491,488,483,480,
	473,468,463,458,455,451,447,440,434,433,
	430,425,420,416,413,409,404,401,401,396,
	390,386,382,378,374,372,368,364,361,357,
	354,351,347,343,340,336,333,328,326,322,
	319,316,313,309,307,303,300,296,294,289,
	286,283,280,276,274,271,267,264,260,257,
	253,249,246,243,240,237,233,231,228,224,
	222,219,214,216,211,209,206,202,198,194,
	187,184,181,178,175,171,168,164,161,158,
	154,152,148,146,142,139,136,133,130,126,
	124,121,116,114,112,108,102,98,96,94,
	89,86};
uchar code table[]="  T:00.0`C";
uchar num=0;
uchar keynum,max=40,min=0;
uchar code Temp_max[]="  Max:40`C",Temp_min[]="  Min:00`C";

sbit ad_wr=P3^6;
sbit ad_rd=P3^7;
sbit ad_cs=P3^5;
sbit ad_int=P3^2;
sbit key1=P0^5;
sbit key2=P0^6;
sbit key3=P0^7;
//sbit Beep=P0^0;

/*********函数表************/
void init();			   		//初始化
void ad_delay(uint t);	   		//延时函数
void change(uchar tempture);	//分离百位、十位、个位
uchar ad_getshuju();				//ad转换
char filter();					//滤波
uint convert();					//电压转换
void tempertur();		   		//度温度
void keyscan();					//键盘扫描

//主函数
void main()
{
	init();
	while(1)
	{
		keyscan();	
	}	
}

void init()
{
	LCD_init();
	for(num=0;num<10;num++)
	{
		LCD_Write_add_data(num,0,table[num]);
	}
}

void ad_delay(uint t)
{
	uchar j;
	uint i;
	for(i=0;i<t;i++)
		for(j=0;j<110;j++);
}

uchar ad_getshuju()
{
	uchar date;
	ad_cs=0;ad_wr=0;ad_rd=1;
	ad_cs=1;ad_wr=1;ad_rd=1;
	while(ad_int==1);
	ad_cs=0;ad_wr=1;ad_rd=0;
    date=P2;
	ad_cs=1;ad_wr=1;ad_rd=1;
	return date;
}

char filter() //滤波函数  中位值滤波法
{
   uint value_buf[N],temp_f;
   uchar count,i,j;
   for ( count=0;count<N;count++)
   {
      value_buf[count] = ad_getshuju();
      delay(2);
   }
   for (j=0;j<N-1;j++)
   {
      for (i=0;i<N-j;i++)
      {
         if ( value_buf[i]>value_buf[i+1] )
         {
            temp_f = value_buf[i];
            value_buf[i] = value_buf[i+1];
             value_buf[i+1] = temp_f;
         }
      }
   }
   return value_buf[(N-1)/2];
}

uint convert()
{ 
	uint temph,templ;       //用于存储读出数据的高字节和低字节 
	uint tmp="0";      	    //存储最后处理完的结果 注意数据类型 
	tmp=filter()+tmp; 					//求滤波后ad值 
	temph=tmp&0xf0; 				//屏蔽低四位 
	temph=temph>>4;  				//右移四位 取出高四位 
	templ=tmp&0x0f;					//屏蔽高四位 取出低四位 
	tmp=templ*20+temph*320; 		//最后的结果是一个四位数，便于显示 	 电压值
	return tmp;						//返回最后处理结果 
}

void change(uchar tempture)
{
	bai=tempture/100;
	shi=tempture%100/10;
	ge=tempture%10;
}

void tempertur()
{
	for(n=0;temp>=ad_date[n];n++);
	tp=temperiture[n-1];
	change(tp);
	LCD_Write_add_data(4,0,0x30+bai);
	LCD_Write_add_data(5,0,0x30+shi);
	LCD_Write_add_data(7,0,0x30+ge);
}


void keyscan()
{
	if(key1==0)
	{
		delay(5);
		if(key1==0)
		{
			while(!key1);
			keynum++;
			if(keynum==1)
			{
				change(max);
				LCD_Write_Com(0x01);
				delay(10);
				LCD_Write_add_str(0,0,10,Temp_max);
				LCD_Write_add_data(6,0,0x30+shi);
				LCD_Write_add_data(7,0,0x30+ge);
			}
			if(keynum==2)
			{
				change(min);
				LCD_Write_Com(0x01);
				min=min>0?min:0;
				delay(10);
				LCD_Write_add_str(0,0,10,Temp_min);
				LCD_Write_add_data(6,0,0x30+shi);
				LCD_Write_add_data(7,0,0x30+ge);
			}
			if(keynum==3)
			{
				keynum=0;
				LCD_Write_Com(0x01);
				delay(10);
				LCD_Write_add_str(0,0,10,table);
			}
		}
	}
	if(keynum==0)
	{
		temp=convert();
		tempertur();
		delay(100);
	}
	else
	{
		if(keynum==1)
		{
			if(key2==0)
			{
				delay(5);
				if(key2==0)
				{
					while(!key2);
					max++;
					change(max);
					delay(1);
				}
			}
			if(key3==0)
			{
				delay(5);
				if(key3==0)
				{						
					while(!key3);
					max--;
					change(max);
					delay(1);
				}
			}
			//LCD_Write_add_str(0,0,9,Temp_max);
			LCD_Write_add_data(6,0,0x30+shi);
			LCD_Write_add_data(7,0,0x30+ge);
		}
		if(keynum==2)
		{
			if(key2==0)
			{
				delay(5);
				if(key2==0)
				{
					while(!key2);
					min++;
					change(min);
					min=min>0?min:0;
					delay(1);
				}
			}
			if(key3==0)
			{
				delay(5);
				if(key3==0)
				{
					while(!key3);
					min--;
					change(min);
					delay(1);
				}
			}
			//LCD_Write_add_str(0,0,9,Temp_min);
			LCD_Write_add_data(6,0,0x30+shi);
			LCD_Write_add_data(7,0,0x30+ge);
		}
	}
}