scan a 3x4 keypad with softaware pulldown resistors by polling it continuously.
Fork of keypad by
Diff: keypad.h
- Revision:
- 1:b8305e120e11
- Parent:
- 0:1fa357ea3fcc
diff -r 1fa357ea3fcc -r b8305e120e11 keypad.h --- a/keypad.h Sat Nov 06 14:36:22 2010 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,53 +0,0 @@ -/* Copyright (c) 2010 Dimiter Kentri - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in -all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -THE SOFTWARE. -*/ - -#ifndef KEYPAD_H -#define KEYPAD_H - -#include "DigitalIn.h" -#include "BusOut.h" - - -namespace mbed{ - -const char NO_KEY = '\0'; -#define KEY_RELEASED NO_KEY - - - -const int keys[16] = {'1','2','3','A', - '4','5','6','B', - '7','8','9','C', - '*','0','#','D'}; - -class Keypad{ - public: - Keypad(PinName col1, PinName col2, PinName col3, PinName col4, PinName row1,PinName row2, PinName row3, PinName row4); - int getKeyIndex(); - char getKey(); - - protected: - DigitalIn _col1,_col2,_col3,_col4; - BusOut _rows; -}; - -} -#endif