thermistor_func.h

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/**
 * @author Matthew Kennedy, (c) 2019
 *
 * A function to convert resistance to thermistor temperature (NTC). Uses the
 * Steinhart-Hart equation to avoid having to compute many logarithms at runtime.
 */
 
#pragma once
 
#include "generated_lookup_engine_configuration.h"
#include "sensor_converter_func.h"
#include "resistance_func.h"
#include "func_chain.h"
 
class ThermistorFunc final : public SensorConverter {
public:
    SensorResult convert(float ohms) const override;
 
    void configure(thermistor_conf_s &cfg);
 
    void showInfo(float testRawValue) const override;
 
    // Steinhart-Hart coefficients
    float m_a = 0;
    float m_b = 0;
    float m_c = 0;
};
 
using resist = ResistanceFunc;
using therm = ThermistorFunc;
 
typedef FuncChain<resist, therm> thermistor_t;