R2ROutput Class Reference

Output to R-2R DAC. You need to define the used digital pins in the configuration. Any number of bits is supported on max 2 channels. For a 4 bit single channel, you need to define 4 digital pins. see https://www.electronics-tutorials.ws/combination/r-2r-dac.html The default driver implementation uses Arduino digitalWrite(). You can provide your own optimized driver. More...

#include <R2ROutput.h>

Inheritance diagram for R2ROutput:

Public Member Functions
virtual void	addNotifyAudioChange (AudioInfoSupport &bi)
	Adds target to be notified about audio changes.
virtual AudioInfo	audioInfo () override
	provides the actual input AudioInfo
virtual AudioInfo	audioInfoOut ()
	provides the actual output AudioInfo: this is usually the same as audioInfo() unless we use a transforming stream
virtual int	availableForWrite () override
bool	begin () override
virtual bool	begin (AudioInfo info)
bool	begin (R2RConfig c)
virtual void	clearNotifyAudioChange ()
	Deletes all change notify subscriptions.
R2RConfig	defaultConfig ()
virtual void	end ()
virtual void	flush ()
virtual bool	isDeletable ()
	If true we need to release the related memory in the destructor.
bool	isNotifyActive ()
	Checks if the automatic AudioInfo update is active.
virtual	operator bool ()
virtual bool	removeNotifyAudioChange (AudioInfoSupport &bi)
	Removes a target in order not to be notified about audio changes.
virtual void	setAudioInfo (AudioInfo newInfo) override
	Defines the input AudioInfo.
void	setNotifyActive (bool flag)
	Deactivate/Reactivate automatic AudioInfo updates: (default is active)
size_t	write (const uint8_t *data, size_t len) override
virtual size_t	write (uint8_t ch) override
virtual void	writeSilence (size_t len)

Protected Member Functions
void	notifyAudioChange (AudioInfo info)
void	writeValue (int channel)
template<typename T >
void	writeValueT (int channel)

Static Protected Member Functions
static void	r2r_timer_callback (void *ptr)

Protected Attributes
int	_timeout = 10
NBuffer< uint8_t >	buffer {DEFAULT_BUFFER_SIZE, 0}
AudioInfo	cfg
bool	is_active = false
bool	is_notify_active = true
Vector< AudioInfoSupport * >	notify_vector
R2RConfig	rcfg
TimerAlarmRepeating	timer
SingleBuffer< uint8_t >	tmp {MAX_SINGLE_CHARS}
int	tmpPos = 0

Detailed Description

Output to R-2R DAC. You need to define the used digital pins in the configuration. Any number of bits is supported on max 2 channels. For a 4 bit single channel, you need to define 4 digital pins. see https://www.electronics-tutorials.ws/combination/r-2r-dac.html The default driver implementation uses Arduino digitalWrite(). You can provide your own optimized driver.

Author

Phil Schatzmann

Copyright

GPLv3

Member Function Documentation

writeSilence()

virtual void writeSilence ( size_t  len )

inlinevirtualinherited

Writes n 0 values (= silence)

Parameters

len

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

• src/AudioTools/AudioLibs/R2ROutput.h