lcd1602.h

lcd1602在c语言中的头文件程序。基于stc5410ad单片机设计

/**************************************************************************
  
                   		THE 1602 CHAR LCD LIB
  
             		COPYRIGHT (c)   2007 BY JHP.
                       		--  ALL RIGHTS RESERVED  --
  
   
  
***************************************************************************/

#ifndef LCD_CHAR_1602_2005_4_9
#define LCD_CHAR_1602_2005_4_9

#include <intrins.h>

//Port Definitions**********************************************************
sbit LcdRs		= P2^5;
sbit LcdRw		= P2^6;
sbit LcdEn  	= P2^7;
sfr  DBPort 	= 0x80;		

//内部等待函数**************************************************************************
unsigned char LCD_Wait(void)
{
	LcdRs=0;
	LcdRw=1;	_nop_();
	LcdEn=1;	_nop_();
	while(DBPort&0x80);						 
						
	LcdEn=0;
	return DBPort;		
}
//向LCD写入命令或数据************************************************************
#define LCD_COMMAND			0      
#define LCD_DATA			1      
#define LCD_CLEAR_SCREEN	0x01      
#define LCD_HOMING  		0x02     
void LCD_Write(bit style, unsigned char input)
{
	LcdEn=0;
	LcdRs=style;
	LcdRw=0;		_nop_();
	DBPort=input;	_nop_();
	LcdEn=1;		_nop_();
	LcdEn=0;		_nop_();
	LCD_Wait();	
}

//设置显示模式************************************************************
#define LCD_SHOW			0x04    //显示开
#define LCD_HIDE			0x00    //显示关	  

#define LCD_CURSOR			0x02 	//显示光标
#define LCD_NO_CURSOR		0x00    //无光标		     

#define LCD_FLASH			0x01    //光标闪动
#define LCD_NO_FLASH		0x00    //光标不闪动

void LCD_SetDisplay(unsigned char DisplayMode)
{
	LCD_Write(LCD_COMMAND, 0x08|DisplayMode);	
}

//设置输入模式************************************************************
#define LCD_AC_UP			0x02
#define LCD_AC_DOWN			0x00      // default

#define LCD_MOVE			0x01      // 画面可平移
#define LCD_NO_MOVE			0x00      //default

void LCD_SetInput(unsigned char InputMode)
{
	LCD_Write(LCD_COMMAND, 0x04|InputMode);
}

//初始化LCD************************************************************
void LCD_Initial()
{
	LcdEn=0;
	LCD_Write(LCD_COMMAND,0x38);                
	LCD_Write(LCD_COMMAND,0x38);
	LCD_SetDisplay(LCD_SHOW|LCD_NO_CURSOR);    //开启显示, 无光标
	LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN);   //清屏
    LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN);   //清屏
    LCD_Write(LCD_COMMAND,LCD_CLEAR_SCREEN);   //清屏
	LCD_SetInput(LCD_AC_UP|LCD_NO_MOVE);       //AC递增, 画面不动
}

//************************************************************************
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 Delay1ms(unsigned int count)
{
	unsigned int i,j;
	for(i=0;i<count;i++)
	for(j=0;j<120;j++);

}

//************************************************************************

#endif