1602液晶显示的C程序

/*============================================================
        使用1602液晶显示的实验例子     明浩  2004/2/27
==============================================================
SMC1602A(16*2)模拟口线接线方式
连接线图: 
       ---------------------------------------------------
       |LCM-----51   | LCM-----51   | LCM------51      |
       --------------------------------------------------|
       |DB0-----P1.0 | DB4-----P1.4 | RW-------P2.0    |
       |DB1-----P1.1 | DB5-----P1.5 | RS-------P2.1    |
       |DB2-----P1.2 | DB6-----P1.6 | E--------P2.2    |
       |DB3-----P1.3 | DB7-----P1.7 | VLCD接1K电阻到GND|
       ---------------------------------------------------



[注:AT89S51使用12M晶振]
=============================================================*/

#define LCM_RW  P2_0 //定义引脚
#define LCM_RS  P2_1
#define LCM_E   P2_2
#define LCM_Data  P1
#define Busy    0x80 //用于检测LCM状态字中的Busy标识

#include <at89x51.h>

void WriteDataLCM(unsigned char WDLCM);
void WriteCommandLCM(unsigned char WCLCM,BuysC);
unsigned char ReadDataLCM(void);

unsigned char ReadStatusLCM(void);
void LCMInit(void);
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
void Delay5Ms(void);
void Delay400Ms(void);

unsigned char code cdle_net[] = {"www.cdle.net"};
unsigned char code email[] = {"pnzwzw@cdle.net"};

void main(void)
{
 Delay400Ms(); //启动等待，等LCM讲入工作状态
 LCMInit(); //LCM初始化
 Delay5Ms(); //延时片刻(可不要)

 DisplayListChar(0, 0, cdle_net);
 DisplayListChar(0, 1, email);
 ReadDataLCM();//测试用句无意义
 while(1);
}

//写数据
void WriteDataLCM(unsigned char WDLCM)
{
 ReadStatusLCM(); //检测忙
 LCM_Data = WDLCM;
 LCM_RS = 1;
 LCM_RW = 0;
 LCM_E = 0; //若晶振速度太高可以在这后加小的延时