unit_Light_data.hpp

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/*
 * SPDX-FileCopyrightText: 2026 M5Stack Technology CO LTD
 *
 * SPDX-License-Identifier: MIT
 */
#ifndef M5_UNIT_LIGHT_UNIT_LIGHT_DATA_HPP
#define M5_UNIT_LIGHT_UNIT_LIGHT_DATA_HPP
 
#include <cstdint>
#include <limits>
 
#include <m5_utility/stl/extension.hpp>
 
namespace m5 {
namespace unit {
 
namespace light {
 
constexpr uint32_t DEFAULT_INTERVAL_MS{50};  
constexpr uint16_t DEFAULT_DARK{0};          
constexpr uint16_t DEFAULT_BRIGHT{4095};     
 
struct Data {
    uint16_t analog_raw{};  
    bool digital{};         
    uint16_t dark{DEFAULT_DARK};      
    uint16_t bright{DEFAULT_BRIGHT};  
 
    inline float normalized() const
    {
        if (dark == bright) {
            return std::numeric_limits<float>::quiet_NaN();
        }
        const float span{static_cast<float>(bright) - static_cast<float>(dark)};
        const float v{(static_cast<float>(analog_raw) - static_cast<float>(dark)) * 100.0f / span};
        return m5::stl::clamp(v, 0.0f, 100.0f);
    }
};
 
}  // namespace light
}  // namespace unit
}  // namespace m5
 
#endif