Erik van Wijk / ButtonIn

A debouncing InterruptIn wrapper

ButtonIn.cpp@2:c353357a97e4, 2012-02-07 (annotated)

Committer:
evwijk
Date:
Tue Feb 07 10:35:38 2012 +0000
Revision:
2:c353357a97e4
Parent:
1:e806603f0088 
First public release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
evwijk 2:c353357a97e4 1 /*
evwijk 2:c353357a97e4 2 ButtonIn is a debouncing InterruptIn class for mbed (http://mbed.org).
evwijk 2:c353357a97e4 3
evwijk 2:c353357a97e4 4 Copyright (C) 2012 Erik van Wijk (http://mbed.org/users/evwijk/)
evwijk 2:c353357a97e4 5
evwijk 2:c353357a97e4 6 This program is free software: you can redistribute it and/or modify
evwijk 2:c353357a97e4 7 it under the terms of the GNU General Public License as published by
evwijk 2:c353357a97e4 8 the Free Software Foundation, either version 3 of the License, or
evwijk 2:c353357a97e4 9 (at your option) any later version.
evwijk 2:c353357a97e4 10
evwijk 2:c353357a97e4 11 This library is distributed in the hope that it will be useful,
evwijk 2:c353357a97e4 12 but WITHOUT ANY WARRANTY; without even the implied warranty of
evwijk 2:c353357a97e4 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
evwijk 2:c353357a97e4 14 GNU General Public License for more details.
evwijk 2:c353357a97e4 15
evwijk 2:c353357a97e4 16 You should have received a copy of the GNU General Public License
evwijk 2:c353357a97e4 17 along with this program. If not, see <http://www.gnu.org/licenses/>.
evwijk 2:c353357a97e4 18 */
evwijk 2:c353357a97e4 19
evwijk 1:e806603f0088 20 #include "ButtonIn.h"
evwijk 1:e806603f0088 21
evwijk 1:e806603f0088 22 ButtonIn::ButtonIn(PinName buttonPin) :
evwijk 1:e806603f0088 23 _button(buttonPin) {
evwijk 1:e806603f0088 24 _buttonCanPress = true;
evwijk 1:e806603f0088 25 _callback = NULL;
evwijk 1:e806603f0088 26 _callbackInstance = NULL;
evwijk 1:e806603f0088 27 _callbackMethod = NULL;
evwijk 2:c353357a97e4 28 timeout = 200;
evwijk 1:e806603f0088 29 _button.rise(this, &ButtonIn::click);
evwijk 1:e806603f0088 30 }
evwijk 1:e806603f0088 31
evwijk 1:e806603f0088 32 void ButtonIn::attach(void (*method)(void)) {
evwijk 1:e806603f0088 33 _callback = method;
evwijk 1:e806603f0088 34 }
evwijk 1:e806603f0088 35
evwijk 1:e806603f0088 36 template<class T>
evwijk 1:e806603f0088 37 void attach(T* instance, void (T::*method)(void)) {
evwijk 1:e806603f0088 38 _callbackInstance = (ButtonInCallbackInstance *)instance;
evwijk 1:e806603f0088 39 _callbackMethod = (void (ButtonInCallbackInstance::*)(void))method;
evwijk 1:e806603f0088 40 }
evwijk 1:e806603f0088 41
evwijk 1:e806603f0088 42 void ButtonIn::click() {
evwijk 1:e806603f0088 43 if (_buttonCanPress) {
evwijk 1:e806603f0088 44 _buttonCanPress = false;
evwijk 2:c353357a97e4 45 _buttonDownTimeout.attach_us(this, &ButtonIn::reset, timeout * 1000);
evwijk 1:e806603f0088 46 call();
evwijk 1:e806603f0088 47 }
evwijk 1:e806603f0088 48 }
evwijk 1:e806603f0088 49
evwijk 1:e806603f0088 50 void ButtonIn::call() {
evwijk 1:e806603f0088 51 if (_callback != NULL)
evwijk 1:e806603f0088 52 (*_callback)();
evwijk 1:e806603f0088 53 else
evwijk 1:e806603f0088 54 (_callbackInstance->*_callbackMethod)();
evwijk 1:e806603f0088 55 }
evwijk 1:e806603f0088 56
evwijk 1:e806603f0088 57 void ButtonIn::reset() {
evwijk 1:e806603f0088 58 _buttonCanPress = true;
evwijk 0:2e999fcd4c7b 59 }