#ifndef _12864_H__
#define _12864_H__
#include <at89x51.h>
#define uchar unsigned char
#define uint unsigned int
sbit E=P2^0;
sbit RW=P2^1;
sbit RS=P2^2;
sbit CS2=P2^3;
sbit CS1=P2^4;
void delay1ms(uint k)
{
  k=k*125;
  while(k--);
}
void chekbusy12864(void)
 {
  uchar dat;
  EX0=0;
  RS=0;       //指令模式 
  RW=1;       //讀數(shù)據(jù)
 do{
   P0=0x00;
   E=1;
   dat=P0&0x80;
   E=0;
  }while(dat!=0x00);
  EX0=1;
 }
  /****選屏****/
void choose12864(uchar i)//i是要寫(xiě)的屏.0是左屏,1是右屏,2是雙屏
{
  switch (i)
  {
    case 0: CS1=0;CS2=1;break;
    case 1: CS1=1;CS2=0;break;
	case 2: CS1=0;CS2=0;break;
	default: break;
  }
}
/******寫(xiě)命令*****/
void cmd_w12864(uchar cmd)		//寫(xiě)命令
{
  chekbusy12864();
  EX0=0;
  RS=0;	            //指令模式
  RW=0;             //寫(xiě)模式
  E=1;
  P0=cmd;
  E=0;
  EX0=1;
}
/****寫(xiě)數(shù)據(jù)******/
void  dat_w12864(uchar dat)
{
  chekbusy12864();
  EX0=0;
  RS=1;
  RW=0;
  E=1;
  P0=dat;
  E=0;
  EX0=1;
}
/*****清屏*****/
void clear12864(void)
{
  uchar page,row;
  for(page=0xb8;page<0xc0;page++)
  {
    cmd_w12864(page);
	cmd_w12864(0x40);
	for(row=0;row<64;row++)
	 {
	   dat_w12864(0x00); 
	 }
  }
}
/***初始化****/
void init12864(void)
{
  chekbusy12864();
  cmd_w12864(0xc0);
  cmd_w12864(0x3f);
}
/**8X16字符的顯示**/
void play8(uchar ch,uchar row,uchar page,uchar *adr)
{
  uchar i;
  choose12864(ch);
  page=page<<1;
  row=row<<3;
  cmd_w12864(row+0x40);
  cmd_w12864(page+0xb8);
  for(i=0;i<8;i++)
  {
    dat_w12864(*(adr+i));
  }
  cmd_w12864(row+0x40);
  cmd_w12864(page+0xb9);
  for(i=8;i<16;i++)
  {
    dat_w12864(*(adr+i));
  }
}
/**16X16顯示**/
void play16(uchar ch,uchar row,uchar page,uchar *adr)
{
  uchar i;
  choose12864(ch);
  page=page<<1;					   
  row=row<<3;
  cmd_w12864(row+0x40);
  cmd_w12864(page+0xb8);
  for(i=0;i<16;i++)
  {
    dat_w12864(*(adr+i));
  }
  cmd_w12864(row+0x40);
  cmd_w12864(page+0xb9);
  for(i=16;i<32;i++)
  {
    dat_w12864(*(adr+i));
  }
} 
/*****讀數(shù)據(jù)*****/
uchar dat_r12864(uchar page,uchar arrange)  //page頁(yè)地址.arrange列地址)
{
  uchar dat;
  chekbusy12864();
  cmd_w12864(page+0xb8);
  cmd_w12864(arrange+0x40);
  EX0=0;
  P0=0xff;
  RW=1;
  RS=1;
  E=1;
  E=0;
  E=1;
  dat=P0;
  E=0;
  return(dat);
  EX0=1;
  }
  /**豎線**/
void vertical(uchar y1,uchar y2,uchar x)//y0表示起點(diǎn),y1表示終點(diǎn)
{
  uchar i,sum=0;
  if(x>63)
   {
     choose12864(1);
     x=x-64;
   }
   else
   {
     choose12864(0);
   }
  if((y1/8)!=(y2/8))
  {
   for(i=0;i<(8-y1%8);i++)
   {
      sum=sum|((2<<((y1%8)+i)));
   }
  cmd_w12864(x+0x40);
  cmd_w12864(y1/8+0xb8);
  dat_w12864(sum);
  sum=0;
   for(i=0;i<(y2/8-y1/8-1);i++)
    {
     cmd_w12864(x+0x40);
	 cmd_w12864((y1/8)+0xb9+i);
	 dat_w12864(0xff);
    }
  for(i=0;i<=(y2%8);i++)
   {
     sum=sum|(2<<i);
   }
   cmd_w12864(x+0x40);
   cmd_w12864(y2/8+0xb8);
   dat_w12864(sum|1);
   sum=0;	
 }
 else
 {
   for(i=0;i<=y2-y1;i++)
    {
	  sum=sum|(2<<(i+(y1%8)));
	}
	cmd_w12864(0x40|x);
	cmd_w12864(0xb8|(y1/8));
	dat_w12864(sum);
 } 
}
/**點(diǎn)的顯示**/
void dot(uchar x,uchar y)//所有的圖形都在右屏上。
{
  uchar dat;
  if(x>63)
  {
    choose12864(1);
	x=x-64;
  }
  else
  {
    choose12864(0);
  }
  dat=dat_r12864(y/8,x);
  cmd_w12864(0x40|x);
  cmd_w12864(0xb8|y/8);
  dat_w12864((1<<(y%8))|dat);
}
/**清除一個(gè)點(diǎn)**/
void cleardot(uchar x,uchar y)
{
  uchar dat,j;
  if(x>63)
  {
    choose12864(1);
	x=x-64;
  }
  else
  {
    choose12864(0);
  }
  dat=dat_r12864(y/8,x);
  cmd_w12864(0x40|x);
  cmd_w12864(0xb8|y/8);
  j=~(1<<y%8);
  dat_w12864(dat&j);
}
/**4X4個(gè)點(diǎn)合為一個(gè)**/
void change(uchar *x,uchar *y)     //x<24  y<15
{
  uchar i,m,n;
  if(*x<24&&*y<15)
  {
   m=(*x)<<2;
   n=((*y)<<2)+2;
   for(i=0;i<4;i++)
   {
    dot(31+m,n+i);
	dot(34+m,n+i);
   }
   dot(32+m,n);
   dot(32+m,n+1);
   dot(32+m,n+3);
   dot(33+m,n);
   dot(33+m,n+2);
   dot(33+m,n+3);
  }
}
void clear(uchar *x,uchar *y)
{
  uchar i,m,n;
  m=((*x)<<2)+31;
  n=((*y)<<2)+2;
  for(i=0;i<4;i++)
  {
    cleardot(m,n+i);
	cleardot(m+1,n+i);
	cleardot(m+2,n+i);
	cleardot(m+3,n+i);
  }
  
}
#endif