keypad.h

00001 /*   Copyright (c) 2010 Dimiter Kentri
00002 
00003 Permission is hereby granted, free of charge, to any person obtaining a copy
00004 of this software and associated documentation files (the "Software"), to deal
00005 in the Software without restriction, including without limitation the rights
00006 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00007 copies of the Software, and to permit persons to whom the Software is
00008 furnished to do so, subject to the following conditions:
00009 
00010 The above copyright notice and this permission notice shall be included in
00011 all copies or substantial portions of the Software.
00012 
00013 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00014 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00015 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00016 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00017 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00018 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00019 THE SOFTWARE.
00020 */
00021 
00022 #ifndef KEYPAD_H
00023 #define KEYPAD_H
00024 
00025 #include "DigitalIn.h"
00026 #include "BusOut.h"
00027 
00028 
00029 namespace mbed{
00030 
00031 const char NO_KEY = '\0';
00032 #define KEY_RELEASED NO_KEY
00033           
00034 
00035        
00036 const int keys[16] = {'1','2','3','A',
00037                       '4','5','6','B',
00038                       '7','8','9','C',
00039                       '*','0','#','D'};
00040                       
00041 class Keypad{    
00042     public:
00043         Keypad(PinName col1, PinName col2, PinName col3, PinName col4, PinName row1,PinName row2, PinName row3, PinName row4);
00044         int getKeyIndex();
00045         char getKey();
00046 
00047     protected:
00048         DigitalIn _col1,_col2,_col3,_col4;    
00049         BusOut _rows;
00050 };
00051 
00052 }
00053 #endif