unit_Vmeter.hpp

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/*
 * SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD
 *
 * SPDX-License-Identifier: MIT
 */
#ifndef M5_UNIT_METER_UNIT_VMETER_HPP
#define M5_UNIT_METER_UNIT_VMETER_HPP
 
#include "unit_av_base.hpp"
#include <limits>  // NaN
 
namespace m5 {
namespace unit {
class UnitVmeter : public UnitAVmeterBase {
    M5_UNIT_COMPONENT_HPP_BUILDER(UnitVmeter, 0x49);
 
public:
    constexpr static uint8_t DEFAULT_EEPROM_ADDRESS{0x53};
    constexpr static float PRESSURE_COEFFICIENT{0.01591895f};
 
    explicit UnitVmeter(const uint8_t addr = DEFAULT_ADDRESS, const uint8_t eepromAddr = DEFAULT_EEPROM_ADDRESS)
        : UnitAVmeterBase(addr, eepromAddr)
    {
        // component_config().clock is set at ADS111x constructor
    }
    virtual ~UnitVmeter()
    {
    }
 
    inline float resolution() const
    {
        return coefficient() / PRESSURE_COEFFICIENT;
    }
 
    inline float correction() const
    {
        return _correction;
    }
 
    inline float voltage() const
    {
        return !empty() ? correction() * adc() : std::numeric_limits<float>::quiet_NaN();
    }
 
protected:
    virtual void apply_coefficient(const ads111x::Gain gain) override;
 
private:
    float _correction{1.0f};
};
}  // namespace unit
}  // namespace m5
#endif