-

1602 C code ,hao dong xi .qing da jia kan.

//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 uctech[] = {"uctech"};
unsigned char code net[] = {"uctech.icpcn.com"};
//***********************************************************************
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, 5, uctech);
 DisplayListChar(0, 0, net);
 ReadDataLCM();                  //测试用句无意义
 while(1);
}
//***********************************************************************
void WriteDataLCM(unsigned char WDLCM)   //写数据
{
 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
 LCM_E = 0;                              //延时
 LCM_E = 1;
}
//**********************************************************************
void WriteCommandLCM(unsigned char WCLCM,BuysC)    //写指令, BuysC为0时忽略忙检测
{
 if (BuysC) ReadStatusLCM();                       //根据需要检测忙
 LCM_Data = WCLCM;
 LCM_RS = 0;
 LCM_RW = 0; 
 LCM_E = 0;
 LCM_E = 0;
 LCM_E = 1; 
}
//***********************************************************************
unsigned char ReadDataLCM(void)      //读数据
{
 LCM_RS = 1; 
 LCM_RW = 1;
 LCM_E = 0;
 LCM_E = 0;
 LCM_E = 1;
 return(LCM_Data);
}
//***********************************************************************
unsigned char ReadStatusLCM(void)    //读状态
{
 LCM_Data = 0xFF; 
 LCM_RS = 0;
 LCM_RW = 1;
 LCM_E = 0;
 LCM_E = 0;
 LCM_E = 1;
 while (LCM_Data & Busy);            //检测忙信号
 return(LCM_Data);
}
//***********************************************************************
void LCMInit(void)         //LCM初始化
{
 LCM_Data = 0;
 WriteCommandLCM(0x38,0);  //三次显示模式设置,不检测忙信号
 Delay5Ms(); 
 WriteCommandLCM(0x38,0);
 Delay5Ms(); 
 WriteCommandLCM(0x38,0);
 Delay5Ms(); 
 WriteCommandLCM(0x38,1);  //显示模式设置,开始要求每次检测忙信号
 WriteCommandLCM(0x08,1);  //关闭显示
 WriteCommandLCM(0x01,1);  //显示清屏
 WriteCommandLCM(0x06,1);  // 显示光标移动设置
 WriteCommandLCM(0x0C,1);  // 显示开及光标设置
}
//************************************************************************
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)   //按指定位置显示一个字符
{
 Y &= 0x1;
 X &= 0xF;                                       //限制X不能大于15,Y不能大于1
 if (Y) X = 0x40;                                //当要显示第二行时地址码 0x40;
 X = 0x80;                                       // 算出指令码
 WriteCommandLCM(X, 0);                          //这里不检测忙信号,发送地址码
 WriteDataLCM(DData);
}
//*************************************************************************
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)   //按指定位置显示一串字符
{
 unsigned char ListLength;
 ListLength = 0;
 Y &= 0x1;
 X &= 0xF;                                        //限制X不能大于15,Y不能大于1
 while (DData[ListLength]>0x20)                   //若到达字串尾则退出
 {
  if (X <= 0xF)                                   //X坐标应小于0xF
     {
       DisplayOneChar(X, Y, DData[ListLength]);   //显示单个字符
       ListLength++;
       X++;
     }
 }
}
//**************************************************************************
void Delay5Ms(void)                 //5ms延时
{
 unsigned int TempCyc = 5552;
 while(TempCyc--);
}
//**************************************************************************
void Delay400Ms(void)               //400ms延时
{
 unsigned char TempCycA = 5;
 unsigned int TempCycB;
 while(TempCycA--)
 {
  TempCycB=7269;
  while(TempCycB--);
 };
}