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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
/* * * * * * * * * * * * * * * * * * * * * * * * * * * *
Main code by Thomas O Fredericks
Rebounce and duration functions contributed by Eric Lowry
Write function contributed by Jim Schimpf
risingEdge and fallingEdge contributed by Tom Harkaway
* * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#ifndef Bounce_h
#define Bounce_h
#include <inttypes.h>
class Bounce
{
public:
// Initialize
Bounce(uint8_t pin, unsigned long interval_millis );
// Sets the debounce interval
void interval(unsigned long interval_millis);
// Updates the pin
// Returns 1 if the state changed
// Returns 0 if the state did not change
int update();
// Forces the pin to signal a change (through update()) in X milliseconds
// even if the state does not actually change
// Example: press and hold a button and have it repeat every X milliseconds
void rebounce(unsigned long interval);
// Returns the updated pin state
int read();
// Sets the stored pin state
void write(int new_state);
// Returns the number of milliseconds the pin has been in the current state
unsigned long duration();
// The risingEdge method is true for one scan after the de-bounced input goes from off-to-on.
bool risingEdge();
// The fallingEdge method it true for one scan after the de-bounced input goes from on-to-off.
bool fallingEdge();
protected:
int debounce();
unsigned long previous_millis, interval_millis, rebounce_millis;
uint8_t state;
uint8_t pin;
uint8_t stateChanged;
};
#endif
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