lcd1602_8a.h

文件夹包含LCD1602的一些经常用到的驱动: ├─★★LCD1602四线驱动 ├─★LCD1602_8显示Mini Driver ├─★★LCD1602A_优化驱动 ├─★▲LCD1602滚

/*--------------------------------------------------------------*/
//File:	LCD1602_8A.H
//Date:	08-8-9	//08-8-8	//08-8-27		//08-8-26
//Time:	20:10
//Modi:	08-8-10	9:51
//Note:	LCD1602	The Best Driver for you!
//		Welcome to use. Have a good day!


/*--------------------------------------------------------------*/ 
//防止被重复定义
#ifndef __LCD1602_8A_H__			
#define __LCD1602_8A_H__
//所需头文件
#include <intrins.h>


/*--------------------------------------------------------------*/ 
//LCD1602与单片机接口定义
sfr		LCD_IO = 0x80;			//P0-0x80,P1-0x90,P2-0xA0,P3-0xB0;
sbit	LCD_RS = P2^0;			//LCD数据/命令选择端(H/L)
sbit	LCD_RW = P2^1;			//LCD  读/写  选择端(H/L)
sbit	LCD_EN = P2^2;			//LCD使能控制端
sbit	LCD_BZ = LCD_IO^7;		//LCD忙标志位


/*--------------------------------------------------------------*/ 
//函数声明
void LCD_busy  (void);													//检测LCD是否忙
void LCD_init  (void);													//LCD初始化
void LCD_clr   (void);													//LCD清屏
void LCD_cmd   (unsigned char cmd);										//写入指令
void LCD_dat   (unsigned char dat);										//写入数据
void LCD_pos   (unsigned char x, unsigned char y);						//显示定位
void LCD_printc(unsigned char x, unsigned char y, unsigned char c);		//定位输出字符
void LCD_prints(unsigned char x, unsigned char y, unsigned char *s);	//定位输出字符串


/*--------------------------------------------------------------*/ 
//检测LCD忙状态
void LCD_busy(void)
{
	do
	{
		LCD_EN = 0;
		LCD_RS = 0;			//指令
		LCD_RW = 1;			//读出
		LCD_IO = 0xff;		
		LCD_EN = 1;
		_nop_();			//高电平读出	延迟时间1us
	}while(LCD_BZ);			//LCD_BZ=1表示忙,LCD_BZ=0表示空闲
	LCD_EN = 0;
}


/*--------------------------------------------------------------*/ 
//写入指令
void LCD_cmd(unsigned char cmd)			
{
	LCD_busy();				//检测忙
	LCD_RS = 0;				//指令
	LCD_RW = 0;				//写入
	LCD_EN = 1;
	LCD_IO = cmd;			//传指令
	LCD_EN = 0;				//下降沿有效
}


/*--------------------------------------------------------------*/ 
//写入数据
void LCD_dat(unsigned char dat)	
{
	LCD_busy();				//检测忙
	LCD_RS = 1;				//数据
	LCD_RW = 0;				//写入
	LCD_EN = 1;
	LCD_IO = dat;			//传数据
	LCD_EN = 0;				//下降沿有效
}


/*--------------------------------------------------------------*/ 
//显示定位
void LCD_pos(unsigned char x, unsigned char y)
{
	if(y)	LCD_cmd(x|0xc0);//y=1第二行显示,y=0第一行显示	0<=x<16
	else	LCD_cmd(x|0x80);//数据指针=80+地址码(00H~27H,40H~67H)
}


/*--------------------------------------------------------------*/ 
//LCD清屏
void LCD_clr(void)
{
	LCD_cmd(0x01);
}


/*--------------------------------------------------------------*/ 
//定位输出字符
void LCD_printc(unsigned char x, unsigned char y, unsigned char c)
{
	LCD_pos(x,y);
	LCD_dat(c);
}


/*--------------------------------------------------------------*/ 
//定位输出字符串
void LCD_prints(unsigned char x, unsigned char y, unsigned char *s)
{
	LCD_pos(x,y);
	while(*s)
	{
		LCD_dat(*s);
		s++;
	}
}


/*--------------------------------------------------------------*/ 
//LCD初始化
void LCD_init(void)
{
	LCD_cmd(0x38);			//设置LCD为16X2显示,5X7点阵,八位数据接口	
	LCD_cmd(0x06);			//LCD显示光标移动设置(光标地址指针加1,整屏显示不移动)
	LCD_cmd(0x0c);			//LCD开显示及光标设置(光标不闪烁,不显示"_")
	LCD_cmd(0x01);			//清屏
}


/*--------------------------------------------------------------*/ 
#endif