111 lines
3.4 KiB
C
111 lines
3.4 KiB
C
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/*
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The MIT License (MIT)
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Copyright (c) 2013 thomasfredericks
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * *
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Main code by Thomas O Fredericks (tof@t-o-f.info)
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Previous contributions by Eric Lowry, Jim Schimpf and Tom Harkaway
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#ifndef Bounce2_h
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#define Bounce2_h
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#if defined(ARDUINO) && ARDUINO >= 100
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#include "Arduino.h"
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#else
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#include "WProgram.h"
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#endif
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// Uncomment the following line for "LOCK-OUT" debounce method
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//#define BOUNCE_LOCK_OUT
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// Uncomment the following line for "BOUNCE_WITH_PROMPT_DETECTION" debounce method
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//#define BOUNCE_WITH_PROMPT_DETECTION
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#include <inttypes.h>
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/*
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#ifndef _BV
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#define _BV(n) (1<<(n))
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#endif
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*/
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class Bounce
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{
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public:
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// Create an instance of the bounce library
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Bounce();
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// Attach to a pin (and also sets initial state)
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void attach(int pin);
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// Attach to a pin (and also sets initial state) and sets pin to mode (INPUT/INPUT_PULLUP/OUTPUT)
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void attach(int pin, int mode);
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// Sets the debounce interval
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void interval(uint16_t interval_millis);
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// Updates the pin
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// Returns 1 if the state changed
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// Returns 0 if the state did not change
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bool update();
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// Returns the updated pin state
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bool read();
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// Returns the falling pin state
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bool fell();
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// Returns the rising pin state
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bool rose();
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// Partial compatibility for programs written with Bounce version 1
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bool risingEdge() { return rose(); }
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bool fallingEdge() { return fell(); }
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Bounce(uint8_t pin, unsigned long interval_millis ) : Bounce() {
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attach(pin);
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interval(interval_millis);
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}
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protected:
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unsigned long previous_millis;
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uint16_t interval_millis;
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uint8_t state;
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uint8_t pin;
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virtual bool readCurrentState() { return digitalRead(pin); }
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virtual void setPinMode(int pin, int mode) {
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#if defined(ARDUINO_STM_NUCLEO_F103RB) || defined(ARDUINO_GENERIC_STM32F103C)
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pinMode(pin, (WiringPinMode)mode);
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#else
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pinMode(pin, mode);
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#endif
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}
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private:
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inline void setStateFlag(const uint8_t flag) {state |= flag;}
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inline void unsetStateFlag(const uint8_t flag) {state &= ~flag;}
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inline void toggleStateFlag(const uint8_t flag) {state ^= flag;}
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inline bool getStateFlag(const uint8_t flag) {return((state & flag) != 0);}
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};
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#endif
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