#include??
typedef?unsigned?char?uchar;
typedef?unsigned?int??uint;

/***************全局變量***************/
uchar?key_Pressed;??????//按鍵是否被按下:1--是，0--否
uchar?key_val;??????????//存放鍵值
uchar?key_Flag;?????????//按鍵是否已放開：1--是，0--否
//設置鍵盤邏輯鍵值與程序計算鍵值的映射
uchar?key_Map[]?=?{12345678910111213141516};

/*******************************************
函數名稱：Init_Keypad
功????能：初始化掃描鍵盤的IO端口
參????數：無
返回值??：無
********************************************/
void?Init_Keypad（void）
{?????
????P1DIR?=?0xf0;???????//P1.0~P1.3設置為輸入狀態(tài)?P1.4~P1.7設置為輸出狀態(tài)
????P1OUT?|=?0xf0;??????//?P1.4~P1.7輸出高電平
????key_Flag?=?0;???????
????key_Pressed?=?0;???
????key_val?=?0;
}
/*********************************************
*?Check_Key（）檢查按鍵，確認鍵值
***********************************

?屬性????????????大小?????日期????時間???名稱
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?????文件??????25540??2012-07-30?14:59??lx54\Debug\Exe\lx54.d43

?????文件???????3596??2012-07-30?13:32??lx54\Debug\Exe\lx54.txt

?????文件??????10042??2012-07-30?09:18??lx54\Debug\Obj\Keypad.r43

?????文件????????150??2012-07-30?14:58??lx54\Debug\Obj\lx54.pbd

?????文件??????30039??2012-07-30?13:32??lx54\Debug\Obj\main.r43

?????文件??????19556??2012-07-30?09:01??lx54\Debug\Obj\nrf2401.r43

?????文件???????3223??2012-07-30?09:18??lx54\Keypad.c

?????文件?????????84??2012-07-30?09:18??lx54\Keypad.h

?????文件???????4261??2012-07-30?15:12??lx54\lx54.dep

?????文件??????20123??2012-07-30?14:59??lx54\lx54.ewd

?????文件??????50320??2012-07-30?14:59??lx54\lx54.ewp

?????文件????????158??2012-07-29?21:10??lx54\lx54.eww

?????文件???????2263??2012-07-30?13:32??lx54\main.c

?????文件???????9741??2012-07-30?09:17??lx54\nrf2401.c

?????文件??????????0??2012-07-30?15:05??lx54\path.txt

?????文件???????1299??2012-07-30?15:11??lx54\settings\lx54.cspy.bat

?????文件???????8183??2012-07-30?15:12??lx54\settings\lx54.dbgdt

?????文件???????1237??2012-07-30?15:12??lx54\settings\lx54.dni

?????文件???????3170??2012-07-30?15:12??lx54\settings\lx54.wsdt

?????目錄??????????0??2012-07-30?09:19??lx54\Debug\Exe

?????目錄??????????0??2012-07-29?21:10??lx54\Debug\List

?????目錄??????????0??2012-07-30?15:12??lx54\Debug\Obj

?????目錄??????????0??2012-07-29?21:10??lx54\Debug

?????目錄??????????0??2012-07-29?21:10??lx54\settings

?????目錄??????????0??2012-07-30?15:02??lx54

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???????????????192985????????????????????25