Encoder_Polling.h

/******************************************************************************************
 * Rotary-encoder decoder for Arduino
 ******************************************************************************************
 * Copyright (c) Robert Bakker 2013
 *
 * This file is free software; you can redistribute it and/or modify
 * it under the terms of either the GNU General Public License version 2
 * or the GNU Lesser General Public License version 2.1, both as
 * published by the Free Software Foundation.
 ******************************************************************************************
 * This library handles polling and decoding a rotary encoder.
 * It is non-blocking code that executes in the background while your sketch
 * does it's thing.
 *****************************************************************************************/

#ifndef Encoder_Polling_H_		// Include guard
#define Encoder_Polling_H_

#include "Arduino.h"	// Has just about everything in it


/*Functions Prototypes********************************************************************/

// This function sets up the library to decode a rotary encoder on pin_A and pin_B.
void encoder_begin(uint8_t pin_A, uint8_t pin_B);

// If the encoder has rotated, this function returns a 1 or -1 depending on the direction.
// It returns a 0 if it hasn't turned.
int8_t encoder_data(void);


#endif	// Part of the include guard