source .c

LCD显示

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int

//s9,s13,s17,s21     ,RD=0,comment
sbit rs=P2^1;
sbit lcden=P2^2;	 
sbit dula=P2^6;
sbit wela=P2^7;
sbit s1=P3^0;
sbit s2=P3^1;
sbit s3=P3^2;
sbit rd=P3^7;
uchar count,s1num;
char shi,fen,miao;
uchar code table[]="1103chenhuayun";
uchar code table1[]="     00:00:00";
void delay(uint z)
{
   uint x,y;
   for(x=z;x>0;x--)
    for(y=110;y>0;y--)
	  ;
 }
 void write_com(uchar com)
 {
  rs=0;
  lcden=0;
  P0=com;
  delay(5);
  lcden=1;
  delay(5);
  lcden=0; 
 }
 void write_date(uchar date)
 {
  rs=1;
  lcden=0;
  P0=date;
  delay(5);
  lcden=1;
  delay(5);
  lcden=0; 
 }
 void init()
 {
   uchar num;
   dula=0;
   wela=0;
   lcden=0;
   write_com(0x38);
   write_com(0x0c);
   write_com(0x06);
   write_com(0x01); 
   write_com(0x80);
   
   for(num=0;num<15;num++)
    {
	 write_date(table[num]);
	 delay(20);
	}
    write_com(0x80+0x40);
   for(num=0;num<14;num++)
   {
    write_date(table1[num]);
	 delay(20);
    } 
	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	EA=1;
	ET0=1;
	TR0=1;  
  }
  void write_sfm(uchar add,uchar date)
  {
   uchar shi,ge;
   shi=date/10;
   ge=date%10;
   write_com(0x80+0x40+add);
   write_date(0x30+shi);
   write_date(0x30+ge);
  }

  void keyscan()
  {
    rd=0;
	if(s1==0)
	{
	 delay(5);
	 if(s1==0)
			  { 
			   s1num++;		
			       while(!s1);  
				     if(s1num==1)
					     {
					      TR0=0; 
					       write_com(0x0f);
					       write_com(0x80+0x40+11);
					     } 
					      if(s1num==2)
					     {
					      write_com(0x80+0x40+8); 
					     } 
					      if(s1num==3)
					     {
					      write_com(0x80+0x40+5);
					     }
					      if(s1num==4)				    
					     {
					      s1num=0;
					      write_com(0x0c);
					      TR0=1;
					     }
		      }
     }

					if(s1num!=0)	      
					  {
					      if(s2==0)
					      {
						  delay(5);
						  if(s2==0)
						  {
						   while(!s2);	 
						   if(s1num==1)
							   {
								     miao++;
									 if(miao==60)
									  {
									   miao=0;
									  }
									 write_sfm(11,miao);
									 write_com(0x80+0x40+11);
									 
							    }
						   if(s1num==2)
						       {
							   	     
									  fen++;
									 if(fen==60)
									  {
									   fen=0;
									  }
									 write_sfm(8,fen);
									 write_com(0x80+0x40+8);
							   }
						   if(s1num==3)
						       {
							   	    
									  shi++;
									 if(shi==24)
									  {
									   shi=0;
									  }
									 write_sfm(5,shi);
									 write_com(0x80+0x40+5);
							   }
						  }
						  }
					  }
           if (s1num!=0)
		   {
		        if(s3==0)
					      {
						  delay(5);
						  if(s3==0)
						  {
						    while(!s3);
							if(s1num==1)
							   {
								     miao--;
									 if(miao==-1)
									  {
									   miao=59;
									  }
									 write_sfm(11,miao);
									 write_com(0x80+0x40+11);
									  
							    }
						    if(s1num==2)
							   {
								     fen--;
									 if(fen==-1)
									  {
									   fen=59;
									  }
									 write_sfm(8,fen);
									 write_com(0x80+0x40+8);
									  
							    }
							if(s1num==3)
							   {
								     shi--;			 
									  if(shi==-1)
									  {
									   shi=23;
									  }	
									 write_sfm(5,shi);
									 write_com(0x80+0x40+5);
									 									
							    }
								
						  }	
						  }
		   }
  }



  void main()
  {
   init();
   while(1)
   {
   keyscan(); 
   }
  }
  void timer0() interrupt 1
  {
   TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	count++;
	if(count==20)
   {
    count=0;
	miao++;
	if(miao==60)
	 {
	  miao=0;
	  fen++;
	 if(fen==60)
	  {
	   fen=0;
	    shi++;
	   if(shi==24)
	   {
	    shi=0;
	   }
	   write_sfm(5,shi); 
	  }
	   write_sfm(8,fen);
	 }
    write_sfm(11,miao);
    }
  }