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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();
+ 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
+
+