/*********************************************************************
 *
 *  $Id: svn_id $
 *
 *  Declares yFindQuadratureDecoder(), the high-level API for QuadratureDecoder functions
 *
 *  - - - - - - - - - License information: - - - - - - - - -
 *
 *  Copyright (C) 2011 and beyond by Yoctopuce Sarl, Switzerland.
 *
 *  Yoctopuce Sarl (hereafter Licensor) grants to you a perpetual
 *  non-exclusive license to use, modify, copy and integrate this
 *  file into your software for the sole purpose of interfacing
 *  with Yoctopuce products.
 *
 *  You may reproduce and distribute copies of this file in
 *  source or object form, as long as the sole purpose of this
 *  code is to interface with Yoctopuce products. You must retain
 *  this notice in the distributed source file.
 *
 *  You should refer to Yoctopuce General Terms and Conditions
 *  for additional information regarding your rights and
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 *
 *  THE SOFTWARE AND DOCUMENTATION ARE PROVIDED 'AS IS' WITHOUT
 *  WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
 *  WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS
 *  FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO
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 *********************************************************************/


#ifndef YOCTO_QUADRATUREDECODER_H
#define YOCTO_QUADRATUREDECODER_H

#include <cfloat>
#include <cmath>

#include "yocto_api.h"

#ifdef YOCTOLIB_NAMESPACE
namespace YOCTOLIB_NAMESPACE
{
#endif

//--- (YQuadratureDecoder return codes)
//--- (end of YQuadratureDecoder return codes)
//--- (YQuadratureDecoder yapiwrapper)
//--- (end of YQuadratureDecoder yapiwrapper)
//--- (YQuadratureDecoder definitions)
class YQuadratureDecoder; // forward declaration

typedef void (*YQuadratureDecoderValueCallback)(YQuadratureDecoder *func, const string& functionValue);
class YMeasure; // forward declaration
typedef void (*YQuadratureDecoderTimedReportCallback)(YQuadratureDecoder *func, YMeasure measure);
#ifndef _Y_DECODING_ENUM
#define _Y_DECODING_ENUM
typedef enum {
    Y_DECODING_OFF = 0,
    Y_DECODING_ON = 1,
    Y_DECODING_INVALID = -1,
} Y_DECODING_enum;
#endif
#define Y_SPEED_INVALID                 (YAPI_INVALID_DOUBLE)
#define Y_EDGESPERCYCLE_INVALID         (YAPI_INVALID_UINT)
//--- (end of YQuadratureDecoder definitions)

//--- (YQuadratureDecoder declaration)
/**
 * YQuadratureDecoder Class: quadrature decoder control interface, available for instance in the
 * Yocto-MaxiKnob or the Yocto-PWM-Rx
 *
 * The YQuadratureDecoder class allows you to read and configure Yoctopuce quadrature decoders.
 * It inherits from YSensor class the core functions to read measurements,
 * to register callback functions, and to access the autonomous datalogger.
 */
class YOCTO_CLASS_EXPORT YQuadratureDecoder: public YSensor {
#ifdef __BORLANDC__
#pragma option push -w-8022
#endif
//--- (end of YQuadratureDecoder declaration)
protected:
    //--- (YQuadratureDecoder attributes)
    // Attributes (function value cache)
    double          _speed;
    Y_DECODING_enum _decoding;
    int             _edgesPerCycle;
    YQuadratureDecoderValueCallback _valueCallbackQuadratureDecoder;
    YQuadratureDecoderTimedReportCallback _timedReportCallbackQuadratureDecoder;

    friend YQuadratureDecoder *yFindQuadratureDecoder(const string& func);
    friend YQuadratureDecoder *yFirstQuadratureDecoder(void);

    // Function-specific method for parsing of JSON output and caching result
    virtual int     _parseAttr(YJSONObject *json_val);

    // Constructor is protected, use yFindQuadratureDecoder factory function to instantiate
    YQuadratureDecoder(const string& func);
    //--- (end of YQuadratureDecoder attributes)

public:
    virtual ~YQuadratureDecoder();
    //--- (YQuadratureDecoder accessors declaration)

    static const double SPEED_INVALID;
    static const Y_DECODING_enum DECODING_OFF = Y_DECODING_OFF;
    static const Y_DECODING_enum DECODING_ON = Y_DECODING_ON;
    static const Y_DECODING_enum DECODING_INVALID = Y_DECODING_INVALID;
    static const int EDGESPERCYCLE_INVALID = YAPI_INVALID_UINT;

    /**
     * Changes the current expected position of the quadrature decoder.
     * Invoking this function implicitly activates the quadrature decoder.
     *
     * @param newval : a floating point number corresponding to the current expected position of the quadrature decoder
     *
     * @return YAPI::SUCCESS if the call succeeds.
     *
     * On failure, throws an exception or returns a negative error code.
     */
    int             set_currentValue(double newval);
    inline int      setCurrentValue(double newval)
    { return this->set_currentValue(newval); }

    /**
     * Returns the cycle frequency, in Hz.
     *
     * @return a floating point number corresponding to the cycle frequency, in Hz
     *
     * On failure, throws an exception or returns YQuadratureDecoder::SPEED_INVALID.
     */
    double              get_speed(void);

    inline double       speed(void)
    { return this->get_speed(); }

    /**
     * Returns the current activation state of the quadrature decoder.
     *
     * @return either YQuadratureDecoder::DECODING_OFF or YQuadratureDecoder::DECODING_ON, according to the
     * current activation state of the quadrature decoder
     *
     * On failure, throws an exception or returns YQuadratureDecoder::DECODING_INVALID.
     */
    Y_DECODING_enum     get_decoding(void);

    inline Y_DECODING_enum decoding(void)
    { return this->get_decoding(); }

    /**
     * Changes the activation state of the quadrature decoder.
     * Remember to call the saveToFlash()
     * method of the module if the modification must be kept.
     *
     * @param newval : either YQuadratureDecoder::DECODING_OFF or YQuadratureDecoder::DECODING_ON, according
     * to the activation state of the quadrature decoder
     *
     * @return YAPI::SUCCESS if the call succeeds.
     *
     * On failure, throws an exception or returns a negative error code.
     */
    int             set_decoding(Y_DECODING_enum newval);
    inline int      setDecoding(Y_DECODING_enum newval)
    { return this->set_decoding(newval); }

    /**
     * Returns the edge count per full cycle configuration setting.
     *
     * @return an integer corresponding to the edge count per full cycle configuration setting
     *
     * On failure, throws an exception or returns YQuadratureDecoder::EDGESPERCYCLE_INVALID.
     */
    int                 get_edgesPerCycle(void);

    inline int          edgesPerCycle(void)
    { return this->get_edgesPerCycle(); }

    /**
     * Changes the edge count per full cycle configuration setting.
     * Remember to call the saveToFlash()
     * method of the module if the modification must be kept.
     *
     * @param newval : an integer corresponding to the edge count per full cycle configuration setting
     *
     * @return YAPI::SUCCESS if the call succeeds.
     *
     * On failure, throws an exception or returns a negative error code.
     */
    int             set_edgesPerCycle(int newval);
    inline int      setEdgesPerCycle(int newval)
    { return this->set_edgesPerCycle(newval); }

    /**
     * Retrieves a quadrature decoder for a given identifier.
     * The identifier can be specified using several formats:
     *
     * - FunctionLogicalName
     * - ModuleSerialNumber.FunctionIdentifier
     * - ModuleSerialNumber.FunctionLogicalName
     * - ModuleLogicalName.FunctionIdentifier
     * - ModuleLogicalName.FunctionLogicalName
     *
     *
     * This function does not require that the quadrature decoder is online at the time
     * it is invoked. The returned object is nevertheless valid.
     * Use the method isOnline() to test if the quadrature decoder is
     * indeed online at a given time. In case of ambiguity when looking for
     * a quadrature decoder by logical name, no error is notified: the first instance
     * found is returned. The search is performed first by hardware name,
     * then by logical name.
     *
     * If a call to this object's is_online() method returns FALSE although
     * you are certain that the matching device is plugged, make sure that you did
     * call registerHub() at application initialization time.
     *
     * @param func : a string that uniquely characterizes the quadrature decoder, for instance
     *         YMXBTN01.quadratureDecoder1.
     *
     * @return a YQuadratureDecoder object allowing you to drive the quadrature decoder.
     */
    static YQuadratureDecoder* FindQuadratureDecoder(string func);

    /**
     * Registers the callback function that is invoked on every change of advertised value.
     * The callback is then invoked only during the execution of ySleep or yHandleEvents.
     * This provides control over the time when the callback is triggered. For good responsiveness,
     * remember to call one of these two functions periodically. The callback is called once juste after beeing
     * registered, passing the current advertised value  of the function, provided that it is not an empty string.
     * To unregister a callback, pass a NULL pointer as argument.
     *
     * @param callback : the callback function to call, or a NULL pointer. The callback function should take two
     *         arguments: the function object of which the value has changed, and the character string describing
     *         the new advertised value.
     * @noreturn
     */
    virtual int         registerValueCallback(YQuadratureDecoderValueCallback callback);
    using YSensor::registerValueCallback;

    virtual int         _invokeValueCallback(string value);

    /**
     * Registers the callback function that is invoked on every periodic timed notification.
     * The callback is invoked only during the execution of ySleep or yHandleEvents.
     * This provides control over the time when the callback is triggered. For good responsiveness, remember to call
     * one of these two functions periodically. To unregister a callback, pass a NULL pointer as argument.
     *
     * @param callback : the callback function to call, or a NULL pointer. The callback function should take two
     *         arguments: the function object of which the value has changed, and an YMeasure object describing
     *         the new advertised value.
     * @noreturn
     */
    virtual int         registerTimedReportCallback(YQuadratureDecoderTimedReportCallback callback);
    using YSensor::registerTimedReportCallback;

    virtual int         _invokeTimedReportCallback(YMeasure value);


    inline static YQuadratureDecoder *Find(string func)
    { return YQuadratureDecoder::FindQuadratureDecoder(func); }

    /**
     * Continues the enumeration of quadrature decoders started using yFirstQuadratureDecoder().
     * Caution: You can't make any assumption about the returned quadrature decoders order.
     * If you want to find a specific a quadrature decoder, use QuadratureDecoder.findQuadratureDecoder()
     * and a hardwareID or a logical name.
     *
     * @return a pointer to a YQuadratureDecoder object, corresponding to
     *         a quadrature decoder currently online, or a NULL pointer
     *         if there are no more quadrature decoders to enumerate.
     */
           YQuadratureDecoder *nextQuadratureDecoder(void);
    inline YQuadratureDecoder *next(void)
    { return this->nextQuadratureDecoder();}

    /**
     * Starts the enumeration of quadrature decoders currently accessible.
     * Use the method YQuadratureDecoder::nextQuadratureDecoder() to iterate on
     * next quadrature decoders.
     *
     * @return a pointer to a YQuadratureDecoder object, corresponding to
     *         the first quadrature decoder currently online, or a NULL pointer
     *         if there are none.
     */
           static YQuadratureDecoder *FirstQuadratureDecoder(void);
    inline static YQuadratureDecoder *First(void)
    { return YQuadratureDecoder::FirstQuadratureDecoder();}
#ifdef __BORLANDC__
#pragma option pop
#endif
    //--- (end of YQuadratureDecoder accessors declaration)
};

//--- (YQuadratureDecoder functions declaration)

/**
 * Retrieves a quadrature decoder for a given identifier.
 * The identifier can be specified using several formats:
 *
 * - FunctionLogicalName
 * - ModuleSerialNumber.FunctionIdentifier
 * - ModuleSerialNumber.FunctionLogicalName
 * - ModuleLogicalName.FunctionIdentifier
 * - ModuleLogicalName.FunctionLogicalName
 *
 *
 * This function does not require that the quadrature decoder is online at the time
 * it is invoked. The returned object is nevertheless valid.
 * Use the method isOnline() to test if the quadrature decoder is
 * indeed online at a given time. In case of ambiguity when looking for
 * a quadrature decoder by logical name, no error is notified: the first instance
 * found is returned. The search is performed first by hardware name,
 * then by logical name.
 *
 * If a call to this object's is_online() method returns FALSE although
 * you are certain that the matching device is plugged, make sure that you did
 * call registerHub() at application initialization time.
 *
 * @param func : a string that uniquely characterizes the quadrature decoder, for instance
 *         YMXBTN01.quadratureDecoder1.
 *
 * @return a YQuadratureDecoder object allowing you to drive the quadrature decoder.
 */
inline YQuadratureDecoder *yFindQuadratureDecoder(const string& func)
{ return YQuadratureDecoder::FindQuadratureDecoder(func);}
/**
 * Starts the enumeration of quadrature decoders currently accessible.
 * Use the method YQuadratureDecoder::nextQuadratureDecoder() to iterate on
 * next quadrature decoders.
 *
 * @return a pointer to a YQuadratureDecoder object, corresponding to
 *         the first quadrature decoder currently online, or a NULL pointer
 *         if there are none.
 */
inline YQuadratureDecoder *yFirstQuadratureDecoder(void)
{ return YQuadratureDecoder::FirstQuadratureDecoder();}

//--- (end of YQuadratureDecoder functions declaration)

#ifdef YOCTOLIB_NAMESPACE
// end of namespace definition
}
#endif

#endif
