//note:如果您使用C語言編寫LCD的底層接口程序的話，這里的定義才會有用
// this file for MCU I/O port or the orther`s hardware config 
// for LCD Display 
#include "REG51.h"
#include "intrins.h"			//包含此頭文件可直接操作內核的寄存器以及一些定義好的宏
/*
#define COM_R_ADDR        (volatile unsigned char xdata *)0x5000
#define COM_W_ADDR        (volatile unsigned char xdata *)0x4000
#define DAT_R_ADDR        (volatile unsigned char xdata *)0x7000
#define DAT_W_ADDR        (volatile unsigned char xdata *)0x6000
*/
#define DAT_PORT			P0			

sbit LCD_EP=P2^4;
sbit LCD_RW = P2^3;
sbit LCD_A0=P2^2;
sbit LCD_CS = P2^0;

sbit LCD_RS=P2^1;				//如果您認為有必要在程序里控制LCD的復位，就定義它吧~呵呵