daisy::AnalogControl Class Reference

Hardware Interface for control inputs
Primarily designed for ADC input controls such as
potentiometers, and control voltage.
. More...

Detailed Description

Hardware Interface for control inputs
Primarily designed for ADC input controls such as
potentiometers, and control voltage.
.

Author

Stephen Hensley

Date

November 2019

#include <ctrl.h>

Public Member Functions
	AnalogControl ()
	~AnalogControl ()
void	Init (uint16_t *adcptr, float sr, bool flip=false, bool invert=false, float slew_seconds=0.002f)
void	InitBipolarCv (uint16_t *adcptr, float sr)
float	Process ()
float	Value () const
void	SetCoeff (float val)
void	SetScale (const float scale)
void	SetOffset (const float offset)
uint16_t	GetRawValue ()
float	GetRawFloat ()
void	SetSampleRate (float sample_rate)

Constructor & Destructor Documentation

AnalogControl()

daisy::AnalogControl::AnalogControl ( )

inline

Constructor

~AnalogControl()

daisy::AnalogControl::~AnalogControl ( )

inline

destructor

Member Function Documentation

GetRawFloat()

float daisy::AnalogControl::GetRawFloat ( )

inline

Returns a normalized float value representing the current ADC value.

GetRawValue()

uint16_t daisy::AnalogControl::GetRawValue ( )

inline

Returns the raw unsigned 16-bit value from the ADC

Init()

void daisy::AnalogControl::Init	(	uint16_t *	adcptr,
		float	sr,
		bool	flip = false,
		bool	invert = false,
		float	slew_seconds = 0.002f
	)

Initializes the control

Parameters

*adcptr	is a pointer to the raw adc read value – This can be acquired with dsy_adc_get_rawptr(), or dsy_adc_get_mux_rawptr()
sr	is the samplerate in Hz that the Process function will be called at.
flip	determines whether the input is flipped (i.e. 1.f - input) or not before being processed.1
invert	determines whether the input is inverted (i.e. -1.f * input) or note before being processed.
slew_seconds	is the slew time in seconds that it takes for the control to change to a new value.

InitBipolarCv()

void daisy::AnalogControl::InitBipolarCv	(	uint16_t *	adcptr,
		float	sr
	)

This Initializes the AnalogControl for a -5V to 5V inverted input All of the Init details are the same otherwise

Parameters

*adcptr	Pointer to analog digital converter
sr	Audio engine sample rate

Process()

float daisy::AnalogControl::Process

(

)

Filters, and transforms a raw ADC read into a normalized range. this should be called at the rate of specified by samplerate at Init time. Default Initializations will return 0.0 -> 1.0 Bi-polar CV inputs will return -1.0 -> 1.0

SetCoeff()

void daisy::AnalogControl::SetCoeff ( float  val )

inline

Directly set the Coefficient of the one pole smoothing filter.

Parameters

val	Value to set coefficient to. Max of 1, min of 0.

SetOffset()

void daisy::AnalogControl::SetOffset ( const float  offset )

inline

Directly set the offset used by the process function Normally this will be set during initialization, but the can be used when calibartion data is used to adjust the control.

SetSampleRate()

void daisy::AnalogControl::SetSampleRate

(

float

sample_rate

)

Set a new sample rate after the ctrl has been initialized

Parameters

sample_rate

New update rate for the switch in hz

SetScale()

void daisy::AnalogControl::SetScale ( const float  scale )

inline

Directly set the scaling factor used by the process function Normally this will be set during initialization, but the can be used when calibartion data is used to adjust the control.

Value()

float daisy::AnalogControl::Value ( ) const

inline

Returns the current stored value, without reprocessing

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

• src/hid/ctrl.h