1602LCD显示

#include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义
#include<intrins.h>

sbit RS = P2^4;   //定义端口
sbit RW = P2^5;
sbit EN = P2^6;

#define RS_CLR RS=0
#define RS_SET RS=1

#define RW_CLR RW=0
#define RW_SET RW=1

#define EN_CLR EN=0
#define EN_SET EN=1

#define DataPort P0
/*------------------------------------------------
uS延时函数，含有输入参数 unsigned char t，无返回值
unsigned char 是定义无符号字符变量，其值的范围是
0~255 这里使用晶振12M，精确延时请使用汇编,大致延时
长度如下 T=tx2+5 uS
------------------------------------------------*/
void DelayUs2x(unsigned char t)
{
while(--t);
}
/*------------------------------------------------
mS延时函数，含有输入参数 unsigned char t，无返回值
unsigned char 是定义无符号字符变量，其值的范围是
0~255 这里使用晶振12M，精确延时请使用汇编
------------------------------------------------*/
void DelayMs(unsigned char t)
{

while(t--)
{
//大致延时1mS
DelayUs2x(245);
DelayUs2x(245);
}
}
/*------------------------------------------------
判忙函数
------------------------------------------------*/
bit LCD_Check_Busy(void)
{
DataPort= 0xFF;
RS_CLR;
RW_SET;
EN_CLR;
_nop_();
EN_SET;
return (bit)(DataPort & 0x80);
}
/*------------------------------------------------
写入命令函数
------------------------------------------------*/
void LCD_Write_Com(unsigned char com)
{
// while(LCD_Check_Busy()); //忙则等待
DelayMs(5);
RS_CLR;
RW_CLR;
EN_SET;
DataPort= com;
_nop_();
EN_CLR;
}
/*------------------------------------------------
写入数据函数
------------------------------------------------*/
void LCD_Write_Data(unsigned char Data)
{
//while(LCD_Check_Busy()); //忙则等待
DelayMs(5);
RS_SET;
RW_CLR;
EN_SET;
DataPort= Data;
_nop_();
EN_CLR;
}

/*------------------------------------------------
清屏函数
------------------------------------------------*/
void LCD_Clear(void)
{
LCD_Write_Com(0x01);
DelayMs(5);
}
/*------------------------------------------------
写入字符串函数
------------------------------------------------*/
void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s)
{
if (y == 0)
{
LCD_Write_Com(0x80 + x);     //表示第一行
}
else
{
LCD_Write_Com(0xC0 + x);      //表示第二行
}
while (*s)
{
LCD_Write_Data( *s);
s ++;
}
}
/*------------------------------------------------
写入字符函数
------------------------------------------------*/
void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data)
{
if (y == 0)
{
LCD_Write_Com(0x80 + x);
}
else
{
LCD_Write_Com(0xC0 + x);
}
LCD_Write_Data( Data);
}
/*------------------------------------------------
初始化函数
------------------------------------------------*/
void LCD_Init(void)
{
LCD_Write_Com(0x38);    /*显示模式设置*/
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
DelayMs(5);
LCD_Write_Com(0x38);
LCD_Write_Com(0x08);    /*显示关闭*/
LCD_Write_Com(0x01);    /*显示清屏*/
LCD_Write_Com(0x06);    /*显示光标移动设置*/
DelayMs(5);
LCD_Write_Com(0x0C);    /*显示开及光标设置*/
}

/*------------------------------------------------
主函数
------------------------------------------------*/
/*void main(void)//静态显示
{
LCD_Init();
LCD_Clear();//清屏
while (1)
{
LCD_Write_String(0,0,"name:zhu ya bei");
LCD_Write_String(0,1,"num :208140239");
while(1);
}
}*/
/*void main(void)//动态显示
{
unsigned char i;
unsigned char *p;

LCD_Init();

while (1)
{
i = 5;
p = "china";
LCD_Clear();
LCD_Write_String(2,0,"Welcome to");
DelayMs(250);
while (*p)
{
LCD_Write_Char(i,1,*p);
i ++;
p ++;
DelayMs(250);
}
DelayMs(250);
}
}*/
void main(void)//滚动显示
{
unsigned char i;
LCD_Init();
LCD_Clear();//清屏
LCD_Write_String(0,0,"Happy new year,have a good day O_o!");
//LCD_Write_String(0,1,"a lucky day ^_^");
while (1)
{
for(i = 0; i <5; i++)
{
DelayMs(100);
}
LCD_Write_Com(0x18);//左平移画面 0x1C 是右平移
}
}
/*void main(void)//移动显示
{
unsigned char i;
unsigned char *pa,*pb;

LCD_Init();
LCD_Write_Com(0x0f);//光标开，光标闪烁开
while (1)
{
pa = "Welcome to china";
pb = "Have a good day!";
LCD_Clear();
LCD_Write_String(0,0,pa);  //显示2行信息
LCD_Write_String(0,1,pb);
for(i=0;i<8;i++)            //延时2s左右
DelayMs(250);
LCD_Clear();                //清屏显示其他信息
i = 0;
while(*pa)                 //循环输入方式显示2行信息
{
LCD_Write_Char(i,0,*pa);
i ++;
pa ++;
DelayMs(250);
}
i=0;
while(*pb)
{
LCD_Write_Char(i,1,*pb);
i ++;
pb ++;
DelayMs(250);
}

DelayMs(250);
}
}*/