sbl::primitives::math::Ewma Class Reference

Detailed Description

Definition at line 29 of file ewma.hpp.

#include <ewma.hpp>

Public Member Functions
	Ewma (uint8_t shift=3)
	Construct EWMA filter.
uint16_t	update (uint16_t raw)
	Feed a new sample and return the smoothed value.
uint16_t	value () const
	Return current smoothed value without updating.
void	set_shift (uint8_t shift)
	Change smoothing exponent without resetting filter state.
void	reset ()
	Reset filter state (next update will re-seed)

Constructor & Destructor Documentation

Ewma()

sbl::primitives::math::Ewma::Ewma ( uint8_t  shift = 3 )

inlineexplicit

Construct EWMA filter.

Parameters

shift

Smoothing exponent (alpha = 1/2^shift). Range: 1–15.

Definition at line 35 of file ewma.hpp.

Member Function Documentation

update()

uint16_t sbl::primitives::math::Ewma::update ( uint16_t  raw )

inline

Feed a new sample and return the smoothed value.

First call seeds the filter (no smoothing on first sample). Internal state uses Q16 fixed-point for sub-LSB precision.

Parameters

raw	Raw input value (16-bit)

Returns

Smoothed output (16-bit)

Definition at line 46 of file ewma.hpp.

Referenced by sbl::components::cv::CvInput::update(), and sbl::components::input::Pot::update().

value()

uint16_t sbl::primitives::math::Ewma::value ( ) const

inline

Return current smoothed value without updating.

Definition at line 63 of file ewma.hpp.

Referenced by sbl::components::input::Pot::smoothed(), and sbl::components::cv::CvInput::value().

set_shift()

void sbl::primitives::math::Ewma::set_shift ( uint8_t  shift )

inline

Change smoothing exponent without resetting filter state.

Definition at line 68 of file ewma.hpp.

Referenced by sbl::components::cv::CvInput::set_smoothing().

reset()

void sbl::primitives::math::Ewma::reset ( )

inline

Reset filter state (next update will re-seed)

Definition at line 71 of file ewma.hpp.

Referenced by sbl::components::cv::CvInput::reset(), and sbl::components::input::Pot::reset().

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The documentation for this class was generated from the following file:

• src/sbl/hw/util/ewma.hpp