lcd_zb成功3.c

这个程序可以在LCD显示器上显示字符串

/*==============================================================*/
/*※※※※※※※※※※※※※系统主文※※※※※※※※※※※※※※*/
/*==============================================================*/
#include <at89x51.h>	
/////////////////////////////////
#define LCM_RS P2_2
#define LCM_RW P2_1                      //定义LCD引脚
#define LCM_E  P2_0
#define LCM_Data P0
#define Busy 0x80                        //用检测LCM状态
#define uchar unsigned char
#define uint unsigned int
//////////////////////////////////////////////////
void delayms(uint i)
{ uint j;
   for(;i--;i>0)
     for(j=0;j<125;j++)
	    {;}

}

//////////////////////////////////////////////////
void Delay5Ms(void)              //5ms延时
{
unsigned int TempCyc = 3552;
while(TempCyc--);
}

////////////////////////////////////////////////////////////////////////
void Delay400Ms(void)           //400ms延时
{
unsigned char TempCycA = 5;
unsigned int TempCycB;
while(TempCycA--)
{
TempCycB=5269;
while(TempCycB--);
};
}
//////////////////////////////////////////////////

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 WriteDataLCM(unsigned char WDLCM)  //写数据
{
ReadStatusLCM(); 
LCM_Data = WDLCM;
LCM_RS = 1;
LCM_RW = 0;
LCM_E = 0;     
LCM_E = 0;     
LCM_E = 1;
}
//////////////////////////////////////////////////
void WriteCommandLCM(unsigned char WCLCM,BuysC)   //写指令
{
if (BuysC) ReadStatusLCM();                     
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);
}*/
//////////////////////////////////////////////////
void LCMInit(void)                     //LCM初始化
{
LCM_Data = 0;
WriteCommandLCM(0x38,0);
Delay5Ms(); 
WriteCommandLCM(0x38,0);
Delay5Ms(); 
WriteCommandLCM(0x38,0);
Delay5Ms(); 
WriteCommandLCM(0x38,1); 
WriteCommandLCM(0x08,1); 
WriteCommandLCM(0x01,1); 
WriteCommandLCM(0x06,1); 
WriteCommandLCM(0x0c,1); 
}
//////////////////////////////////////////////////
/*void Locatexy(char x,char y)               //确定光标位置
{ char temp;
  temp=x&0xf;
  y&=0x1;
  if(y)
    temp|=0x40;
  temp|=0x80;
  WriteCommandLCM(temp,0);
}*/
//////////////////////////////////////////////////
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
Y &= 0x1;
X &= 0xF;              
if (Y) X |= 0x40;      
X |= 0x80;             
WriteCommandLCM(X, 0); 
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;                      //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小于0xF
{
DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
ListLength++;
X++;
}
}
}
//////////////////////////////////////////////////

void main(void)                                //主函数显示 
{
 Delay400Ms();        
 LCMInit();           
 Delay5Ms();  
 DisplayListChar(0,0, "cross--1" );
 delayms(2000);  
 DisplayListChar(0,0, "cross--2" );
 delayms(2000);
 DisplayListChar(0,0, "cross--3" );
 delayms(2000);
 DisplayListChar(0,0, "cross--4" );
 delayms(2000);
 DisplayListChar(0,0, "cross--5" );
 delayms(2000);
 while(1);                               
}