/************************************
*程序名：lcd_chinese.h
*功  能：清達液晶HG128642C-LY(帶中文液晶字庫)
		 動程序帶字符串顯示等基本函數(shù)
*
*作  者：       董志峰
*單  位：湖南理工物電系創(chuàng)新基地
*        All rights reseverd
*
*開始時間：2006.11.16
*結(jié)束時間：2006.11.20
*版本信息：
*
*注  備：
*************************************/

#ifndef _LCD_CHINESE_
	#define _LCD_CHINESE_

#include <reg52.h>
#include <intrins.h>
#include "delay.h"	

#define NULL ((void *) 0)	
#define DATABUS P2
sbit RS  = P1^0;
sbit RW  = P1^1;
sbit E   = P1^2;
sbit RST = P0^4;
//sbit speaker = P2^1;
void Delay1us(unsigned char);
void Delay1ms(unsigned int);
void Delay1s(unsigned int);

#ifndef _UNCHAR_
	#define _UNCHAR_
	typedef unsigned char unchar;
#endif

#ifndef _UNINT_
	#define _UNINT_
	typedef unsigned int unint;
#endif

/************************************
*函數(shù)名：void lcd_writbyte(char data,bit type)
*功  能：向lcd寫入一字節(jié)
*輸  入：
		 data：要寫入的數(shù)據(jù)
		 type：選擇方式（1為數(shù)據(jù)方式，0為命令方式)
*返  回：void
*************************************/
void lcd_writebyte(char dt,bit type)
{
	unsigned char busy;
	unsigned int wait = 0;
	RS = 0;
	RW = 1;
	do
	{
		E = 1;
		busy = DATABUS;
		E = 0;
		if(wait++ >	2500)  
			break;
	}while(busy&0x80);     //如果忙，一直等待
	if(type) 
	{
		RS = 1;			//寫數(shù)據(jù)
		RW = 0;
	} 
    else 
	{
		RS = 0;			//寫指令
		RW = 0;
	}    
	DATABUS = dt;
	E  = 1;
	E  = 0;
}

#if 0
/************************************
*函數(shù)名：char lcd_read(void)
*功  能：讀取lcd
*輸  入：void
*返  回：char
*************************************/
/*
char lcd_read(void)
{
	unsigned char dt;
	RS = 1;
	RW = 1;
	dt = DATABUS;
	E  = 1;
	E  = 0;
	RW = 1;
	return dt;
}*/
#endif

/************************************
*函數(shù)名：void lcd_init(void)
*功  能：初始化lcd
*輸  入：void
*返  回：void
*************************************/
void lcd_init(void)
{
	Delay1ms(100);
	lcd_writebyte(0x30,0);//設(shè)定基本指令集
	Delay1us(100);
	lcd_writebyte(0x30,0);//設(shè)定基本指令集
	Delay1us(40);
	lcd_writebyte(0x0c,0);//顯示開
	Delay1us(100);
	lcd_writebyte(0x01,0);//清除
	Delay1ms(20);
	lcd_writebyte(0x06,0);//設(shè)定AC+1
	Delay1us(100);
	lcd_writebyte(0x80,0);//設(shè)定起始地址
	Delay1us(100);
}

/************************************
*函數(shù)名：void lcd_CN(unsigned char x,unsigned char y,char *)
*功  能：顯示漢字
*輸  入：char *,unsigned char x,unsigned char y
		 漢字：x范圍 0~7 y范圍 0~3
		 英文：x范圍 0~15 y范圍 0~7
*返  回：void
*************************************/
void lcd_CN(unsigned char *buf,unsigned char x,unsigned char y)
{
	unsigned char adr;
	adr = (0x80+x);			
	switch(y)				
	{
		case 2:
			adr = adr+16;break;
		case 3:
			adr = adr+8;break;
		case 4:
			adr = adr+24;break;
		default:
			break;
	}
	lcd_writebyte(adr,0);  //設(shè)定DDRAM位址到位址計數(shù)器
	Delay1us(100);
	while((*buf)!='\0')		
	{
		lcd_writebyte(*(buf++),1);
		Delay1us(100);
	}
}
		 #if 0
/************************************
*函數(shù)名：void lcd_CN2(unsigned char (*buf)[],unsigned char x,unsigned char y)
*功  能：顯示漢字
*輸  入：char *,unsigned char x,unsigned char y
		 漢字：x范圍 0~7 y范圍 0~3
		 英文：x范圍 0~15 y范圍 0~7
*返  回：void
*注  備：用于2維字符數(shù)組
*************************************/
/*
void lcd_CN2(unsigned char (*buf)[],unsigned char x,unsigned char y)//看清聲明形式！！！
{
	unsigned char adr;
	unchar i=0;
	adr = (0x80+x);			
	switch(y)				
	{
		case 2:
			adr = adr+16;break;
		case 3:
			adr = adr+8;break;
		case 4:
			adr = adr+24;break;
		default:
			break;
	}
	lcd_writebyte(adr,0);  //設(shè)定DDRAM位址到位址計數(shù)器
	Delay1us(100);
	while(*(*buf+i)!='\0')		
	{
		lcd_writebyte(*(*buf+i),1);
		i++;
		Delay1us(100);
	}
}

	
unsigned char *d = {"董dzf 志"};
unsigned char *z = {"zf"};
unsigned char *f = {"f"};
main()
{
	void (*p)() = &lcd_CN;
	lcd_init();
	lcd_CN(d,1,1);
	lcd_CN(z,2,2);
	lcd_CN(f,3,3);
	for(;;);
} */
	#endif

#endif