Debounce a mechanical switch by periodic sampling.
Dependents: RedButton WS_7_Seg_mit_LM1635 WS_7_Seg_mit_LM1635 Lichtschalter_M0 ... more
Debouncer.h
- Committer:
- huliyang
- Date:
- 2015-05-18
- Revision:
- 2:7f2f00805d41
- Parent:
- 0:2359961af424
File content as of revision 2:7f2f00805d41:
/* Copyright (c) 2015 Liyang HU, MIT License * * 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. */ #include <mbed.h> #include <DigitalIn.h> #include <Ticker.h> class Debouncer : private Ticker { private: FunctionPointer fun_fall, fun_rise; DigitalIn in; uint32_t previous; uint8_t _samples; bool now; void tick(void); public: Debouncer(PinName pin, PinMode mode = PullUp); Debouncer &samples(uint8_t n = 8); Debouncer &period(float seconds = 3.90625e-3); operator bool(void); Debouncer &attach_fall(void (*fun)(void) = NULL); Debouncer &attach_rise(void (*fun)(void) = NULL); template <typename T> Debouncer &attach_fall(T *obj, void (T::*fun)(void) = NULL); template <typename T> Debouncer &attach_rise(T *obj, void (T::*fun)(void) = NULL); };