/******************************************************************
** 1602A液晶屏驅動
** AT89C51的晶振頻率：12M
** 連接方式：RW---P3.6     RS---P3.5      E---P3.4
******************************************************************/
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int

 uchar code table[]="I LIKE MCU!";
uchar code table1[]="5201314";

sbit lcden=P3^4;
sbit lcdrs=P3^5;
sbit lcdrw=P3^6;

#define LCD_Data P0

uchar num;
uchar num1[3];
uint ii;
		             	//長延時
  void delay(void)
{
	uint x,y;
	for(x=5;x>0;x--)
		for(y=7269;y>0;y--);
}
						//短延時
  void delay1(void)
{
	uint y;
	
		for(y=5552;y>0;y--);
}
    uchar LCD_Status(void)
    {
        
        lcdrs = 0;
        lcdrw = 1;
        lcden = 0;
        lcden = 0;	
        lcden = 1;
        while (LCD_Data & 0x80); //檢測忙信號
        return(LCD_Data);
    }

						 		//寫命令
  void write_com(uchar com,busy)
{	 if(busy)  LCD_Status();
	lcdrs=0;
	   lcdrw=0;
	P0=com;
	delay1();
	lcden=1;
	delay1();
	lcden=0;
}
								//寫數據
	void write_data(uchar date)
{	//  LCD_Status();
	lcdrs=1;
	   lcdrw=0;
	P0=date;
	delay1();
	lcden=1;
	delay1();
	lcden=0;
}
								//初始化
  void init()
{

	lcden=0;
	write_com(0x38,0);
		  delay1();
		   	write_com(0x38,0);
		  delay1();
		   	write_com(0x38,0);
		  delay1();
		   write_com(0x38,1);	   
			write_com(0x08,1);
		   	write_com(0x01,1);
	write_com(0x0e,1);
	write_com(0x06,1);
	//	   write_com(0x80+0x03);
	//		write_com(0x80+0x40);
	
	}
														  //在指定位置寫一個字符
	   void DisplayOneChar(uchar X, uchar Y, uchar DData)
    {
        Y &= 0x1;
        X &= 0xF; //限制X不能大于15，Y不能大于1
        if (Y) X |= 0x40; //當要顯示第二行時地址碼+0x40;
        X |= 0x80; // 算出指令碼
        write_com(X,0); //這里不檢測忙信號，發送地址碼
       write_data(DData);
    }

														 //寫字符串
	   void DisplayListChar(uchar X, uchar Y, uchar code *DData)
    {
        uchar b=0;
      
        //Y &= 0x1;
      //  X &= 0xF; //限制X不能大于15，Y不能大于1
        while (DData[b]>'\0') //若到達字串尾則退出
        {
           // w (X <= 0xF) //X坐標應小于0xF
              
                DisplayOneChar(X++, Y, DData[b++]); //顯示單個字符
              if(X==16)
			  {X=0;Y^=1;}
           
        }
    }
	        	//主函數
	 void main()
{
	 delay();
	init();
	  DisplayListChar(0,0,table);
		  write_com(0x01,1);
	     DisplayListChar(0,1,table1);



	 // write_data('1')	;
/*	 	for(num=0;num<11;num++)
	{
		write_data(table[num]);
		delay1();

	}
		write_com(0x80+0x40);
	for(num=0;num<13;num++)
	{
		write_data(table1[num]);
		delay1();
	}	   */
/*	for(num=0;num<16;num++)
	{
		write_com(0x18);
		delay1();
	}			
	 while(1)  {
		   
		  write_com(0x0c);		//三位數遞增顯示
	 for(num=0;num<999;num++)
	 { 	  num1[0]=(num/100)%10;
	 	num1[1]=(num/10)%10;
		 num1[2]=(num/1)%10;
		 write_com(0x80+0x4d);
	   for(ii=0; ii<3; ii++)
	 {write_data(num1[ii]+'0');
	  	delay1();  }
	 }
	 }	 */	
	//	while(1);
	}