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46 lines
832 B
C++
46 lines
832 B
C++
//
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// FILE: map2bits.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.0
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// PURPOSE: Arduino library for mapping a float to a number of bits.
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// URL: https://github.com/RobTillaart/map2bits
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#include "map2bits.h"
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map2bits::map2bits()
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{
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init(0, 100, 10);
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}
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bool map2bits::init(float in_min, float in_max, uint8_t size)
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{
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float _inRange = in_max - in_min;
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if ((_inRange == 0.0 ) || (size > 32)) return false;
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_outMax = size;
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_in_min = in_min;
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_in_max = in_max;
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_factor = _outMax/_inRange;
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_base = - _in_min * _factor;
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return true;
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}
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uint32_t map2bits::map(float value)
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{
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if (value <= _in_min) return 0;
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if (value >= _in_max) return (uint32_t(1) << _outMax) - 1;
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uint8_t count = round(_base + value * _factor);
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uint32_t bits = (uint32_t(1) << count) - 1;
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return bits;
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}
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// -- END OF FILE --
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