Liyang HU / Debouncer Featured

Debounce a mechanical switch by periodic sampling.

Dependents:   RedButton WS_7_Seg_mit_LM1635 WS_7_Seg_mit_LM1635 Lichtschalter_M0 ... more

Debouncer.h@0:2359961af424, 2015-05-18 (annotated)

Committer:
huliyang
Date:
Mon May 18 12:57:27 2015 +0000
Revision:
0:2359961af424
Child:
2:7f2f00805d41
init

Who changed what in which revision?

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huliyang 0:2359961af424 1 /* Copyright (c) 2015 Liyang HU, MIT License
huliyang 0:2359961af424 2 *
huliyang 0:2359961af424 3 * Permission is hereby granted, free of charge, to any person obtaining
huliyang 0:2359961af424 4 * a copy of this software and associated documentation files (the
huliyang 0:2359961af424 5 * "Software"), to deal in the Software without restriction, including
huliyang 0:2359961af424 6 * without limitation the rights to use, copy, modify, merge, publish,
huliyang 0:2359961af424 7 * distribute, sublicense, and/or sell copies of the Software, and to
huliyang 0:2359961af424 8 * permit persons to whom the Software is furnished to do so, subject to
huliyang 0:2359961af424 9 * the following conditions:
huliyang 0:2359961af424 10 *
huliyang 0:2359961af424 11 * The above copyright notice and this permission notice shall be
huliyang 0:2359961af424 12 * included in all copies or substantial portions of the Software.
huliyang 0:2359961af424 13 *
huliyang 0:2359961af424 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
huliyang 0:2359961af424 15 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
huliyang 0:2359961af424 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
huliyang 0:2359961af424 17 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
huliyang 0:2359961af424 18 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
huliyang 0:2359961af424 19 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
huliyang 0:2359961af424 20 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
huliyang 0:2359961af424 21 */
huliyang 0:2359961af424 22
huliyang 0:2359961af424 23 #include <mbed.h>
huliyang 0:2359961af424 24 #include <DigitalIn.h>
huliyang 0:2359961af424 25 #include <Ticker.h>
huliyang 0:2359961af424 26
huliyang 0:2359961af424 27 class Debouncer : private Ticker
huliyang 0:2359961af424 28 {
huliyang 0:2359961af424 29 private:
huliyang 0:2359961af424 30 FunctionPointer fun_fall, fun_rise;
huliyang 0:2359961af424 31 DigitalIn in;
huliyang 0:2359961af424 32 bool now;
huliyang 0:2359961af424 33 int _samples;
huliyang 0:2359961af424 34 uint32_t previous;
huliyang 0:2359961af424 35 void tick(void);
huliyang 0:2359961af424 36
huliyang 0:2359961af424 37 public:
huliyang 0:2359961af424 38 Debouncer(PinName pin, PinMode mode = PullUp);
huliyang 0:2359961af424 39 Debouncer &samples(int n = 8);
huliyang 0:2359961af424 40 Debouncer &period(float seconds = 3.90625e-3);
huliyang 0:2359961af424 41 operator bool(void);
huliyang 0:2359961af424 42
huliyang 0:2359961af424 43 Debouncer &attach_fall(void (*fun)(void) = NULL);
huliyang 0:2359961af424 44 Debouncer &attach_rise(void (*fun)(void) = NULL);
huliyang 0:2359961af424 45 template <typename T>
huliyang 0:2359961af424 46 Debouncer &attach_fall(T *obj, void (T::*fun)(void) = NULL);
huliyang 0:2359961af424 47 template <typename T>
huliyang 0:2359961af424 48 Debouncer &attach_rise(T *obj, void (T::*fun)(void) = NULL);
huliyang 0:2359961af424 49 };