fractional16()

u16 Potentiometer::fractional16

(

)

const

Definition at line 68 of file potentiometer.cpp.hpp.

                                      {
    // Handle invalid range
    if (mMaxValue <= mMinValue) {
        return 0;
    }
 
    // Clamp current value to calibrated range
    u16 clamped_value;
    if (mCurrentValue < mMinValue) {
        clamped_value = mMinValue;
    } else if (mCurrentValue > mMaxValue) {
        clamped_value = mMaxValue;
    } else {
        clamped_value = mCurrentValue;
    }
 
    // Map calibrated range to [0, 65535]
    // Use 32-bit intermediate to avoid overflow
    u32 range = mMaxValue - mMinValue;
    u32 offset = clamped_value - mMinValue;
    u32 scaled = (offset * 65535U) / range;
    return static_cast<u16>(scaled);
}

References mCurrentValue, mMaxValue, mMinValue, and offset().

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