基于光敏电阻的C51单片机LCD显示照度计

清疚 2022-11-03 11:04 152阅读 0赞

### 基于光敏电阻的C51单片机LCD显示照度计 ###

基于光敏电阻的单片机LCD显示照度计。顾名思义就是基于CdS光敏电阻的特性，利用51单片机，测量出所接CdS光敏电阻两端电压，并通过CdS光敏电阻的特性，换算为光照度，在LCD1602显示屏上显示CdS光敏电阻电压和所对应的光照度。  
https://download.csdn.net/download/weixin\_53403301/15492326  
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#include <reg52.h>
    #define uint unsigned int 
    #define uchar unsigned char
    sbit _st= P2^5;
    sbit _eoc=P2^6;
    sbit _oe=P2^7;
    
    uchar ad_result=0;
    int vol,lux;
    float realv;
    
    sbit rs=P2^0;		  //¶¨ÒåLCD½Ó¿Ú
    sbit rw=P2^1;
    sbit en=P2^2;
    
    uchar code t1[]={
        "GD20181109010ZJR"};		  //³õÊ¼LCDÆÁÄ»ÉÏÐÐÏÔÊ¾ °à¼¶ ÐÕÃû
    uchar code t2[]={
        "     Lux .   Vol"};		  //ÏÂÐÐÏÔÊ¾ Ñ§ºÅ µ¥Î»
    void delay(uint ms)		  //ÑÓÊ±
    {
        
     uint i,j;
     for(i=ms;i>0;i--)
     for(j=110;j>0;j--);
    }
    
    void writelcd_cmd(uchar cmd)//Ïò1602Òº¾§ÏÔÊ¾Æ÷ÀïÐ´ÈëÃüÁîµÄº¯Êý
    {
        
    en=0;
    rs=0;
    rw=0;
    delay(1);
    P0=cmd;		  //P0¿ÚÊä³ö
    en=1;
    delay(1);
    en=0;
    }
    
    void writelcd_dat(uchar dat)//Ïò1602Òº¾§ÏÔÊ¾Æ÷ÀïÐ´ÈëÊý¾ÝµÄº¯Êý
    {
        
    en=0;
    rs=1;
    rw=0;
    delay(1);
    P0=dat;
    en=1;
    delay(1);
    en=0;
    }
    
    void lcd_init()	 //³õÊ¼»¯1602Òº¾§ÏÔÊ¾Æ÷µÄº¯Êý
    {
        
    uchar i,j;
    writelcd_cmd(0x38);	 //ÇåÆÁÏÔÊ¾
    delay(5);
    writelcd_cmd(0x38);
    delay(5);
    writelcd_cmd(0x38);
    writelcd_cmd(0x08);
    writelcd_cmd(0x01);
    writelcd_cmd(0x06);
    writelcd_cmd(0x0c);
    writelcd_cmd(0x80);
    	
    for(i=0;i<16;i++)
    {
        
    writelcd_dat(t1[i]);		  //Ã¿Ò»Î»ÒÔ´Ë¶ÁÈ¡×ÖÄ£t1²¢ÏÔÊ¾×Ö·û
    }
    writelcd_cmd(0xc0);
    for(j=0;j<16;j++)		  //ÒÀ´Î¶ÁÈ¡t2²¢ÏÔÊ¾
    {
        
    writelcd_dat(t2[j]);
    }
    }
    
    void display(uint dat,uchar add)
    {
        
    uchar bai,shi ,ge,sfen;
    bai=dat/1000;
    shi=dat/100%10;
    ge=dat/10%10;
    sfen=dat%10;	
    writelcd_cmd(add);
    writelcd_dat(bai+0x30);
    writelcd_cmd(add+2);
    writelcd_dat(shi+0x30);
    writelcd_dat(ge+0x30);
    writelcd_dat(sfen+0x30);
    }
    
    void display2(uint dat,uchar add)
    {
        
    uchar bai,shi ,ge,sfen,wan;
    wan=dat/10000;
    bai=dat/1000&10;
    shi=dat/100%10;
    ge=dat/10%10;
    sfen=dat%10;	
    writelcd_cmd(add);
    writelcd_dat(wan+0x30);
    writelcd_dat(bai+0x30);
    writelcd_dat(shi+0x30);
    writelcd_dat(ge+0x30);
    writelcd_dat(sfen+0x30);
    }
    
    void main(void)
    {
        
    	lcd_init();
    	EA=1;
    	TH0=(65536-50000)/256;    //ÄÚ²¿ÖÐ¶ÏT0³õÊ¼»¯
        TL0=(65536-50000)%256;    
        TR0=1;    //ÄÚ²¿ÖÐ¶ÏT0¿ªÆô
        ET0=1;
    	while(1)
    	{
        
    		
    		_st=0;_st=1;_st=0;
    		while(!_eoc);
    		_oe=1;
    		ad_result=P1;
    		_oe=0;
    		
    		vol=5000-(100.0*ad_result/5.1);
    		realv=vol/1000.0;
    		lux=864/((10*realv)/(5-realv)-1.36);
    		if(lux<=30000 && lux>=1)
    		{
        	
    		lux=864/((10*realv)/(5-realv)-1.36);
    		display2(lux,0xc0);
    		display(vol,0xc8);
    		}
    		else
    		{
        		
    		display(vol,0xc8);
    		}
    	}
    }
    
    void count0() interrupt 1  		  //T0ÖÐ¶Ï Ê±¼ä¼ÆÊ±³ÌÐò
    {
          
    	P3=0xff;
    	
    	P3=0xfe;
    	
    }

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