#ifndef LCD_CHAR_1602_2005_4_9
#define LCD_CHAR_1602_2005_4_9
#include <intrins.h>
//Port Definitions**********************************************************
sbit LcdRs = P2^0;
sbit LcdRw = P2^1;
sbit LcdEn = P2^2;
sfr DBPort = 0x80; //P0=0x80,P1=0x90,P2=0xA0,P3=0xB0.數(shù)據(jù)端口
//內(nèi)部等待函數(shù)**************************************************************************
unsigned char LCD_Wait(void)
{
LcdRs=0;
LcdRw=1; _nop_();
LcdEn=1; _nop_();
while(DBPort&0x80);//在用Proteus仿真時，注意用屏蔽此語句，在調(diào)用GotoXY()時，會進入死循環(huán)，
//可能在寫該控制字時，該模塊沒有返回寫入完備命令，即DBPort&0x80==0x80
//實際硬件時打開此語句
LcdEn=0;
return DBPort;
}
//向LCD寫入命令或數(shù)據(jù)************************************************************
#define LCD_COMMAND 0 // Command
#define LCD_DATA 1 // Data
#define LCD_CLEAR_SCREEN 0x01 // 清屏
#define LCD_HOMING 0x02 // 光標返回原點
void LCD_Write(bit style, unsigned char input)
{
LcdEn=0;
LcdRs=style;
LcdRw=0; _nop_();
DBPort=input; _nop_();//注意順序
LcdEn=1; _nop_();//注意順序
LcdEn=0; _nop_();
LCD_Wait();
}
//設(shè)置顯示模式************************************************************
#define LCD_SHOW 0x04 //顯示開
#define LCD_HIDE 0x00 //顯示關(guān)
#define LCD_CURSOR 0x02 //顯示光標
#define LCD_NO_CURSOR 0x00 //無光標
#define LCD_FLASH 0x01 //光標閃動
#define LCD_NO_FLASH 0x00 //光標不閃動
void LCD_SetDisplay(unsigned char DisplayMode)
{
LCD_Write(LCD_COMMAND, 0x08|DisplayMode);
}
//設(shè)置輸入模式************************************************************
#define LCD_AC_UP 0x02
#define LCD_AC_DOWN 0x00 // default
#define LCD_MOVE 0x01 // 畫面可平移
#define LCD_NO_MOVE 0x00 //default
void LCD_SetInput(unsigned char InputMode)
{
LCD_Write(LCD_COMMAND, 0x04|InputMode);
}
//移動光標或屏幕************************************************************
/*
#define LCD_CURSOR 0x02
#define LCD_SCREEN 0x08
#define LCD_LEFT 0x00
#define LCD_RIGHT 0x04
void LCD_Move(unsigned char object, unsigned char direction)
{
if(object==LCD_CURSOR)
LCD_Write(LCD_COMMAND,0x10|direction);
if(object==LCD_SCREEN)
LCD_Write(LCD_COMMAND,0x18|direction);
}
*/
//初始化LCD************************************************************
void LCD_Initial()
{
LcdEn=0;
LCD_Write(LCD_COMMAND,0x38); //8位數(shù)據(jù)端口,2行顯示,5*7點陣
LCD_Write(LCD_COMMAND,0x38);
LCD_SetDisplay(LCD_SHOW|LCD_NO_CURSOR); //開啟顯示, 無光標
LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN); //清屏
LCD_SetInput(LCD_AC_UP|LCD_NO_MOVE); //AC遞增, 畫面不動
}
//************************************************************************
void GotoXY(unsigned char x, unsigned char y)
{
if(y==0)
LCD_Write(LCD_COMMAND,0x80|x);
if(y==1)
LCD_Write(LCD_COMMAND,0x80|(x-0x40));
}
void Print(unsigned char *str)
{
while(*str!='\0')
{
LCD_Write(LCD_DATA,*str);
str++;
}
}
void LCD_Print(unsigned char x, unsigned char y, unsigned char *str)
{
GotoXY(x,y);
Print(str);
}
/*
void LCD_LoadChar(unsigned char user[8], unsigned char place)
{
unsigned char i;
LCD_Write(LCD_COMMAND,0x40|(place*8));
for(i=0; i<8; i++)
LCD_Write(LCD_DATA,user[i]);
}
*/
//************************************************************************
#endif
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