AutoAnalog Class Reference

#include <AutoAnalogAudio.h>

User Interface
Main methods to drive the library
uint8_t	dacBuffer [MAX_BUFFER_SIZE]
uint8_t	adcBuffer [MAX_BUFFER_SIZE]
uint16_t	dacBuffer16 [MAX_BUFFER_SIZE]
uint16_t	adcBuffer16 [MAX_BUFFER_SIZE]
bool	autoAdjust
uint8_t	adcBitsPerSample
uint8_t	dacBitsPerSample
TaskHandle_t	dacTaskHandle
	AutoAnalog ()
void	begin (bool enADC, bool enDAC)
void	triggerADC ()
void	getADC (uint32_t samples=MAX_BUFFER_SIZE)
void	feedDAC (uint8_t dacChannel=0, uint32_t samples=MAX_BUFFER_SIZE, bool startInterrupts=false)
void	setSampleRate (uint32_t sampRate=0, bool stereo=true)
void	dacHandler (void)
void	enableAdcChannel (uint8_t pinAx)
void	disableAdcChannel (uint8_t pinAx)
void	disableDAC (bool withinTask=false)
void	adcInterrupts (bool enabled=true)
void	dacInterrupts (bool enabled=true, bool withinTask=false)
void	rampOut (uint8_t sample)
void	rampIn (uint8_t sample)

Detailed Description

Examples

AudioRadioRelay.ino, MultiChannelAdcStream.ino, NRF52_PDM_PWMTest.ino, SdAudioAuto.ino, SdAudioBasic.ino, SdAudioRecording.ino, SdAudioWavPlayer.ino, SimpleAdcStream.ino, SimpleSine.ino, SimpleSine12Bit.ino, WirelessMicrophone.ino, and WirelessSpeaker.ino.

Definition at line 37 of file AutoAnalogAudio.h.

Constructor & Destructor Documentation

AutoAnalog()

AutoAnalog::AutoAnalog

(

)

Member Function Documentation

begin()

void AutoAnalog::begin	(	bool	enADC,
		bool	enDAC
	)

Setup the timer(s)

Examples

AudioRadioRelay.ino, MultiChannelAdcStream.ino, NRF52_PDM_PWMTest.ino, SdAudioAuto.ino, SdAudioBasic.ino, SdAudioRecording.ino, SdAudioWavPlayer.ino, SimpleAdcStream.ino, SimpleSine.ino, SimpleSine12Bit.ino, WirelessMicrophone.ino, and WirelessSpeaker.ino.

triggerADC()

void AutoAnalog::triggerADC

(

)

Note

This function is no longer required and does nothing

getADC()

void AutoAnalog::getADC

(

uint32_t

samples = MAX_BUFFER_SIZE

)

Load the current ADC data into the ADC Data Buffer

Parameters

samples

The number of samples to retrieve from the ADC

Note

Changes to the number of samples will not take place until one buffer has been returned with the previous number of samples

Examples

AudioRadioRelay.ino, MultiChannelAdcStream.ino, NRF52_PDM_PWMTest.ino, SimpleAdcStream.ino, and WirelessMicrophone.ino.

feedDAC()

void AutoAnalog::feedDAC	(	uint8_t	dacChannel = 0,
		uint32_t	samples = MAX_BUFFER_SIZE,
		bool	startInterrupts = false
	)

Feed the current PCM/WAV data into the DAC for playback

Parameters

dacChannel	0 for DAC0, 1 for DAC1, 2 for alternating DAC0/DAC1
samples	The number of samples to send to the DAC
startInterrupts	Only used for the ESP32, this will enable an RTOS task to handle DAC

Examples

AudioRadioRelay.ino, NRF52_PDM_PWMTest.ino, SdAudioAuto.ino, SdAudioBasic.ino, SimpleSine.ino, SimpleSine12Bit.ino, and WirelessSpeaker.ino.

setSampleRate()

void AutoAnalog::setSampleRate	(	uint32_t	sampRate = 0,
		bool	stereo = true
	)

Set sample rate. 0 enables the default rate specified in AutoAnalog_config.h

Parameters

sampRate	This sets the defined sample rate ie: 32000 is 32Khz
stereo	Only used for the ESP32, this sets stereo or mono output and affects the sample rate

Examples

AudioRadioRelay.ino, MultiChannelAdcStream.ino, NRF52_PDM_PWMTest.ino, SdAudioAuto.ino, SdAudioBasic.ino, SimpleAdcStream.ino, SimpleSine.ino, SimpleSine12Bit.ino, WirelessMicrophone.ino, and WirelessSpeaker.ino.

dacHandler()

void AutoAnalog::dacHandler

(

void

)

Function called by DAC IRQ

Examples

AudioRadioRelay.ino, SdAudioAuto.ino, SdAudioBasic.ino, SimpleSine.ino, SimpleSine12Bit.ino, WirelessMicrophone.ino, and WirelessSpeaker.ino.

enableAdcChannel()

void AutoAnalog::enableAdcChannel

(

uint8_t

pinAx

)

Enable reads from the specified channel (pins A0-A6)

Active ADC Channels will be read in numeric order, high to low

Note

Specify pins numerically: 0=A0, 1=A1, etc...

Examples

MultiChannelAdcStream.ino.

disableAdcChannel()

void AutoAnalog::disableAdcChannel

(

uint8_t

pinAx

)

Disable reads from the specified channel (pins A0-A6)

Note

Specify pins numerically: 0=A0, 1=A1, etc...

disableDAC()

void AutoAnalog::disableDAC

(

bool

withinTask = false

)

Disable the DAC

Parameters

withinTask

Only used for ESP32, set to true if calling from within a task itself, see included example

Examples

SdAudioAuto.ino.

adcInterrupts()

void AutoAnalog::adcInterrupts

(

bool

enabled = true

)

En/Disable the interrupt for the ADC

If enabled, the following function needs to be added:

void ADC_Handler(void){
 -code here-
}

dacInterrupts()

void AutoAnalog::dacInterrupts	(	bool	enabled = true,
		bool	withinTask = false
	)

rampOut()

void AutoAnalog::rampOut

(

uint8_t

sample

)

Rampout and RampIn functions ramp the signal in/out to minimize 'pop' sound made when en/disabling the DAC

Parameters

sample

For ESP32 only, provide the first or last sample to ramp the signal in/out

rampIn()

void AutoAnalog::rampIn

(

uint8_t

sample

)

Member Data Documentation

dacBuffer

uint8_t AutoAnalog::dacBuffer[MAX_BUFFER_SIZE]

DAC data buffer for 8-bit samples

8-bit user samples are loaded directly into this buffer before calling feedDAC()

See also

dacBitsPerSample

Examples

AudioRadioRelay.ino, SdAudioAuto.ino, SdAudioBasic.ino, and SimpleSine.ino.

Definition at line 82 of file AutoAnalogAudio.h.

adcBuffer

uint8_t AutoAnalog::adcBuffer[MAX_BUFFER_SIZE]

ADC Data buffer for 8-bit samples

8-bit samples are read directly from this buffer after calling getADC()

See also

adcBitsPerSample

Examples

AudioRadioRelay.ino, and WirelessMicrophone.ino.

Definition at line 89 of file AutoAnalogAudio.h.

dacBuffer16

uint16_t AutoAnalog::dacBuffer16[MAX_BUFFER_SIZE]

DAC data buffer for 10 or 12-bit samples

10 or 12-bit user samples are loaded directly into this buffer before calling feedDAC()

See also

dacBitsPerSample

Examples

NRF52_PDM_PWMTest.ino, SdAudioAuto.ino, SimpleSine12Bit.ino, and WirelessSpeaker.ino.

Definition at line 96 of file AutoAnalogAudio.h.

adcBuffer16

uint16_t AutoAnalog::adcBuffer16[MAX_BUFFER_SIZE]

ADC Data buffer for 10 or 12-bit samples

10 or 12-bit samples are read directly from this buffer after calling getADC()

See also

adcBitsPerSample

Examples

MultiChannelAdcStream.ino, NRF52_PDM_PWMTest.ino, and SimpleAdcStream.ino.

Definition at line 104 of file AutoAnalogAudio.h.

autoAdjust

bool AutoAnalog::autoAdjust

Auto & Manual sample rates. En/Disables automatic adjustment of timers

Default: true

Examples

AudioRadioRelay.ino, MultiChannelAdcStream.ino, NRF52_PDM_PWMTest.ino, SdAudioAuto.ino, SdAudioBasic.ino, SdAudioRecording.ino, SdAudioWavPlayer.ino, SimpleAdcStream.ino, SimpleSine.ino, SimpleSine12Bit.ino, WirelessMicrophone.ino, and WirelessSpeaker.ino.

Definition at line 124 of file AutoAnalogAudio.h.

adcBitsPerSample

uint8_t AutoAnalog::adcBitsPerSample

ADC (Analog to Digital Converter)
Select the bits-per-sample for incoming data
Default: 8:8-bit, 10:10-bit, 12:12-bit

There are two separate data buffers for the ADC,selected by setting this variable.
adcBuffer[] is an 8-bit buffer used solely for your 8-bit samples
adcBuffer16[] is a 16-bit buffer used solely for placing your 10 and 12-bit samples

Examples

MultiChannelAdcStream.ino, NRF52_PDM_PWMTest.ino, SimpleAdcStream.ino, and WirelessMicrophone.ino.

Definition at line 135 of file AutoAnalogAudio.h.

dacBitsPerSample

uint8_t AutoAnalog::dacBitsPerSample

DAC (Digital to Analog Converter)
Select the bits-per-sample for incoming data
Default: 8:8-bit, 10:10-bit, 12:12-bit

There are two separate data buffers for the DAC, selected by setting this variable.
dacBuffer[] is an 8-bit buffer used solely for your 8-bit samples
dacBuffer16[] is a 16-bit buffer used solely for placing your 10 and 12-bit samples

Examples

NRF52_PDM_PWMTest.ino, SdAudioAuto.ino, SdAudioBasic.ino, SimpleSine12Bit.ino, and WirelessSpeaker.ino.

Definition at line 146 of file AutoAnalogAudio.h.

dacTaskHandle

TaskHandle_t AutoAnalog::dacTaskHandle

Definition at line 189 of file AutoAnalogAudio.h.

---

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

• src/AutoAnalogAudio.h