mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
46 lines
832 B
C++
46 lines
832 B
C++
//
|
|
// FILE: map2bits.cpp
|
|
// AUTHOR: Rob Tillaart
|
|
// VERSION: 0.1.0
|
|
// PURPOSE: Arduino library for mapping a float to a number of bits.
|
|
// URL: https://github.com/RobTillaart/map2bits
|
|
|
|
|
|
#include "map2bits.h"
|
|
|
|
|
|
map2bits::map2bits()
|
|
{
|
|
init(0, 100, 10);
|
|
}
|
|
|
|
|
|
bool map2bits::init(float in_min, float in_max, uint8_t size)
|
|
{
|
|
float _inRange = in_max - in_min;
|
|
if ((_inRange == 0.0 ) || (size > 32)) return false;
|
|
|
|
_outMax = size;
|
|
_in_min = in_min;
|
|
_in_max = in_max;
|
|
|
|
_factor = _outMax/_inRange;
|
|
_base = - _in_min * _factor;
|
|
return true;
|
|
}
|
|
|
|
|
|
uint32_t map2bits::map(float value)
|
|
{
|
|
if (value <= _in_min) return 0;
|
|
if (value >= _in_max) return (uint32_t(1) << _outMax) - 1;
|
|
|
|
uint8_t count = round(_base + value * _factor);
|
|
uint32_t bits = (uint32_t(1) << count) - 1;
|
|
return bits;
|
|
}
|
|
|
|
|
|
// -- END OF FILE --
|
|
|