/*
 * StorableValue.hh
 *
 *  Created on: 3 сент. 2020 г.
 *      Author: ПО и ВТ ЭП
 */

#ifndef UMLIBRARY_SCHEMATIC_STORABLEVALUE_HH_
#define UMLIBRARY_SCHEMATIC_STORABLEVALUE_HH_

#include "../systemic/IValueAsync.hpp"
#include "../systemic/IProcess.hh"
#include "../peripheral/IMemoryAccess.hh"

namespace schematic {

//!Хранимое значение.
/*!Персистентное значение, сохраняемое в предоставленной памяти.
 *
 */
class StorableValue : public systemic::IValueType<float>, public systemic::IProcess {
public:
    struct Constraints {
        float min;
        float max;
    };

    StorableValue( const Constraints &, peripheral::IMemoryAccess & memory, std::size_t offset, float default_value );

    void set( float value );
    float get() const;

    const float & value() const;
    const bool & valid() const;

    void process();

private:
    float current_value;
    const float default_value;
    bool need_set = false;

    enum {
        read,
        waitReadComplete,
        write,
        waitWriteComplete,
        idle,
    } value_state;

    Constraints limits;

    static const size_t buff_size = sizeof(float) + 1;
    char buff[buff_size];
    bool is_value_valid;

    peripheral::IMemoryAccess & memory;
    const std::size_t offset;

    char calcCrcValue( float value );
};

}

#endif /* UMLIBRARY_SCHEMATIC_STORABLEVALUE_HH_ */