linear_func.cpp

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#include "pch.h"
 
#include "linear_func.h"
 
void LinearFunc::configure(float in1, float out1, float in2, float out2, float minOutput, float maxOutput) {
    m_minOutput = minOutput;
    m_maxOutput = maxOutput;
 
    in1 = in1 / m_divideInput;
    in2 = in2 / m_divideInput;
 
    m_a = INTERPOLATION_A(in1, out1, in2, out2);
    m_b = out1 - m_a * in1;
}
 
SensorResult LinearFunc::convert(float inputValue) const {
    float result = m_a * inputValue + m_b;
 
    // Bounds checks
    // Flipped error codes in case of m_a < 0 so that they indicate whether the input
    // voltage is high/low, instead of the output high/low
    if (result > m_maxOutput) {
        return m_a > 0 ? UnexpectedCode::High : UnexpectedCode::Low;
    }
 
    if (result < m_minOutput) {
        return m_a > 0 ? UnexpectedCode::Low : UnexpectedCode::High;
    }
 
    return result;
}