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)
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.

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

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