/*============================================================
????????使用1602液晶顯示和PS/2鍵盤的示例??
????????-------------------------------------------------
???????????
==============================================================

SMC1602A（16*2）模擬口線接線方式
連接線圖:	
???????---------------------------------------------------
???????|LCM-----51???|	LCM-----51???|	LCM------51??????|
???????--------------------------------------------------|
???????|DB0-----P1.0?|	DB4-----P1.4?|	RW-------P2.1????|
???????|DB1-----P1.1?|	DB5-----P1.5?|	RS-------P2.0????|
???????|DB2-----P1.2?|	DB6-----P1.6?|	E--------P2.2????|
???????|DB3-----P1.3?|	DB7-----P1.7?|	VLCD接1K電阻到GND|
???????---------------------------------------------------

Keyboard接線
??????PS/2--------51
??????1?DATA------P3.4
??????3?GND
??????4?VCC
??????5?CLK-------P3.3?接在51的外部中斷，觸發(fā)方式為低電平


[注:AT89x51使用12M或11.0592M晶振實(shí)測(cè)使用11.059M
[Keil?uV2?7.01編譯運(yùn)行通過?程序中沒有做鍵盤數(shù)據(jù)的奇偶校驗(yàn)]

=============================================================*/
#include?
#include?“scancodes.h“

#define?LCM_RW??P2_1?//定義LCD引腳
#define?LCM_RS??P2_0
#define?LCM_E???P2_2
#define?LCM_Data??P0

#define?Key_Data?P3_4?//定義Keyboard引腳
#define?Key_CLK??P3_3

#define?Busy????0x80?//用于檢測(cè)LCM狀態(tài)字中的Busy標(biāo)識(shí)

void?LCMInit（void）;
void?DisplayOneChar（unsigned?char?X?unsigned?char?Y?unsigned?char?DData）;
void?DisplayListChar（unsigned?char?X?unsigned?char?Y?unsigned?char?code?*DData）;
void?Delay5Ms（void）;
void?Delay400Ms（void）;
void?Decode（unsigned?char?ScanCode）;
void?WriteDataLCM（unsigned?char?WDLCM）;
void?WriteCommandLCM（unsigned?char?WCLCMBuysC）;

unsigned?char?ReadDataLCM（void）;
unsigned?char?ReadStatusLCM（void）;
unsigned?char?code?cdle_net[]?=?{“??www.pp51.com??“};
unsigned?char?code?email[]?=?{“pp51com@163.com“};
unsigned?char?code?Cls[]?=?{“????????????????“};
static?unsigned?char?IntNum?=?0;?//中斷次數(shù)計(jì)數(shù)
static?unsigned?char?KeyV;?//鍵值
static?unsigned?char?DisNum?=?0;?//顯示用指針
static?unsigned?char?Key_UP=0?Shift?=?0;//Key_UP是鍵松開標(biāo)識(shí)，Shift是Shift鍵按下標(biāo)識(shí)
static?unsigned?char?BF?=?0;?//標(biāo)識(shí)是否有字符被收到

void?main（void）
{
	unsigned?char?TempCyc;

	Delay400Ms（）;?//啟動(dòng)等待，等LCM講入工作狀態(tài)
	LCMInit（）;?//LCM初始化
	Delay5Ms（）;?//延時(shí)片刻（可不要）

	DisplayListChar（0?0?cdle_net）;
	DisplayListChar（0?1?email）;
	ReadDataLCM（）;//測(cè)試用句無意義
	for?（TempCyc=0;?TempCyc<10;?TempCyc++）
			Delay400Ms（）;?//延時(shí)
	DisplayListChar（0?1?Cls）;	
	
	IT1?=?0;?//設(shè)外部中斷1為低電平觸發(fā)
	EA?=?1;
	EX1?=?1;?//開中斷

	do
		{
			if?（BF）
				Decode（KeyV）;
			else
				EA?=?1;?//開中斷
		}
	while（1）;
}

//寫數(shù)據(jù)
void?WriteDataLCM（unsigned?char?WDLCM）?
{
	ReadStatusLCM（）;?//檢測(cè)忙
	LCM_Data?=?WDLCM;
	LCM_RS?=?1;
	LCM_RW?=?0;
	LCM_E?=?0;?//若晶振速度太高可以在這后加小的延時(shí)
	LCM_E?=?0;?//延時(shí)
	LCM_E?=?1;
}

//寫指令
void?WriteCommandLCM（unsigned?char?WCLCMBuysC）?//BuysC為0時(shí)忽略忙檢測(cè)
{
	if?（BuysC）?ReadStatusLCM（）;?//根據(jù)需要檢測(cè)忙
	LCM_Data?=?WCLCM;
	LCM_RS?=?0;
	LCM_RW?=?0;	
	LCM_E?=?0;
	LCM_E?=?0;
	LCM_E?=?1;	
}

//讀數(shù)據(jù)
unsigned?char?ReadDataLCM（void）
{

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件??????14653??2008-04-27?13:04??PS2Key\PS2Key.M51

?????文件???????6942??2005-05-28?20:23??PS2Key\PS2Key.c

?????文件????????504??2008-04-27?13:10??PS2Key\PS2Key.plg

?????文件???????1506??2004-03-03?21:00??PS2Key\scancodes.h

????.......??????1660??2005-05-28?20:23??PS2Key\PS2Key_Uv2.Bak

?????文件???????1942??2008-04-27?13:04??PS2Key\PS2Key.Uv2

????.......???????829??2005-05-28?20:24??PS2Key\PS2Key_Opt.Bak

?????文件????????858??2008-04-27?13:04??PS2Key\PS2Key.Opt

?????文件??????15118??2008-04-27?13:04??PS2Key\PS2Key.LST

?????文件??????14123??2008-04-27?13:04??PS2Key\PS2Key.OBJ

?????文件??????12019??2008-04-27?13:04??PS2Key\PS2Key

?????文件???????3158??2008-04-27?13:04??PS2Key\PS2Key.hex

?????目錄??????????0??2008-04-27?13:03??PS2Key

-----------?---------??----------?-----??----

????????????????73312????????????????????13