Interrupt-driven Arduino RX driver for pulse-based protocols. More...

#include <RxDriverArduino.h>

Inheritance diagram for pulsewire::RxDriverArduino:

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Collaboration diagram for pulsewire::RxDriverArduino:

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Public Member Functions
	RxDriverArduino (Codec &codec, uint8_t pin, uint32_t freqHz=DEFAULT_BIT_FREQ_HZ, bool useChecksum=false, uint32_t timeoutUs=0)

void	init (Codec &codec, uint8_t pin, uint32_t freqHz=DEFAULT_BIT_FREQ_HZ, bool useChecksum=false, uint32_t timeoutUs=0)

void	setFrameSize (uint16_t size) override
	Set the expected frame size for dynamic data reception.

void	setRxBufferSize (size_t size)
	Set the size of the internal RX buffer.

bool	begin (uint16_t bitFrequencyHz=DEFAULT_BIT_FREQ_HZ) override
	Start the receiver.

size_t	readBytes (uint8_t *buffer, size_t length) override

int	available () override
	Get the number of bytes available in the internal buffer.

void	end ()
	Stop the receiver.

Protected Member Functions
void IRAM_ATTR	handleInterrupt () override

void	processEdges ()

void	checkTimeout ()

void	reset ()

Protected Attributes
volatile uint32_t	_lastEdge

volatile bool	_lastLevel

uint8_t	_pin

uint32_t	_freqHz

uint16_t	_frameSize = DEFAULT_FRAME_SIZE

Codec &	_codec

RingBuffer< uint8_t >	_rxBuffer

RingBuffer< OutputEdge >	_edgeBuffer

uint32_t	_bitPeriodUs = 0

uint32_t	_minUs = 0

uint32_t	_maxUs = 0

bool	_useChecksum = false

uint32_t	_timeoutUs = 0

volatile bool	_is_active = false

volatile bool	_is_open = false

Detailed Description

Interrupt-driven Arduino RX driver for pulse-based protocols.

RxDriverArduino receives and decodes pulse-based signals (such as IR or single-wire protocols) using hardware interrupts for precise edge timing. It supports any Codec (Manchester, NRZ, etc.) and is compatible with both platforms that support attachInterruptArg (e.g., ESP32, RP2040) and those that do not (e.g., AVR, via ISRManager).

Features:

Interrupt-driven edge capture for reliable timing
Works with any Codec (Manchester, NRZ, PWM, etc.)
Configurable RX pin, bit frequency, frame size, and optional checksum
Automatic timing window calculation for robust decoding
Buffering of received bytes and edges
Timeout and frame boundary detection
Supports up to 10 concurrent instances on platforms without attachInterruptArg

Limitations:

On platforms without attachInterruptArg, only 10 instances can be active (one per RX pin)
Maximum reliable bit rate depends on hardware and signal quality (typically up to 2–3 kbit/s)

Definition at line 141 of file RxDriverArduino.h.

Constructor & Destructor Documentation

◆ RxDriverArduino()

pulsewire::RxDriverArduino::RxDriverArduino	(	Codec &	codec,
		uint8_t	pin,
		uint32_t	freqHz = `DEFAULT_BIT_FREQ_HZ`,
		bool	useChecksum = `false`,
		uint32_t	timeoutUs = `0`
	)

inline

Parameters

codec	IR codec
pin	RX pin
freqHz	Bit frequency
useChecksum	If true, validate checksum (default: false)

Definition at line 150 of file RxDriverArduino.h.

◆ ~RxDriverArduino()

pulsewire::RxDriverArduino::~RxDriverArduino ( )

inline

Definition at line 173 of file RxDriverArduino.h.

Member Function Documentation

◆ available()

int pulsewire::RxDriverArduino::available ( )

inlineoverridevirtual

Get the number of bytes available in the internal buffer.

Implements pulsewire::RxDriver.

Definition at line 242 of file RxDriverArduino.h.

◆ begin()

bool pulsewire::RxDriverArduino::begin ( uint16_t bitFrequencyHz = DEFAULT_BIT_FREQ_HZ )

inlineoverridevirtual

Start the receiver.

Implements pulsewire::RxDriver.

Definition at line 186 of file RxDriverArduino.h.

◆ checkTimeout()

void pulsewire::RxDriverArduino::checkTimeout ( )

inlineprotected

Definition at line 315 of file RxDriverArduino.h.

◆ end()

void pulsewire::RxDriverArduino::end ( )

inlinevirtual

Stop the receiver.

Implements pulsewire::RxDriver.

Definition at line 250 of file RxDriverArduino.h.

◆ handleInterrupt()

void IRAM_ATTR pulsewire::RxDriverArduino::handleInterrupt ( )

inlineoverrideprotectedvirtual

Implements pulsewire::RxDriverInt.

Definition at line 286 of file RxDriverArduino.h.

◆ init()

void pulsewire::RxDriverArduino::init	(	Codec &	codec,
		uint8_t	pin,
		uint32_t	freqHz = `DEFAULT_BIT_FREQ_HZ`,
		bool	useChecksum = `false`,
		uint32_t	timeoutUs = `0`
	)

inline

Definition at line 161 of file RxDriverArduino.h.

◆ processEdges()

void pulsewire::RxDriverArduino::processEdges ( )

inlineprotected

Definition at line 299 of file RxDriverArduino.h.

◆ readBytes()

size_t pulsewire::RxDriverArduino::readBytes	(	uint8_t *	data,
		size_t	size
	)

inlineoverridevirtual

Read up to 'size' bytes from the internal buffer into 'data'. Returns number of bytes read.

Implements pulsewire::RxDriver.

Definition at line 231 of file RxDriverArduino.h.

◆ reset()

void pulsewire::RxDriverArduino::reset ( )

inlineprotected

Definition at line 340 of file RxDriverArduino.h.

◆ setFrameSize()

void pulsewire::RxDriverArduino::setFrameSize ( uint16_t size )

inlineoverridevirtual

Set the expected frame size for dynamic data reception.

Implements pulsewire::RxDriver.

Definition at line 175 of file RxDriverArduino.h.

◆ setRxBufferSize()

void pulsewire::RxDriverArduino::setRxBufferSize ( size_t size )

inlinevirtual

Set the size of the internal RX buffer.

Implements pulsewire::RxDriver.

Definition at line 184 of file RxDriverArduino.h.

Field Documentation

◆ _bitPeriodUs

uint32_t pulsewire::RxDriverArduino::_bitPeriodUs = 0

protected

Definition at line 272 of file RxDriverArduino.h.

◆ _codec

Codec& pulsewire::RxDriverArduino::_codec

protected

Definition at line 268 of file RxDriverArduino.h.

◆ _edgeBuffer

RingBuffer<OutputEdge> pulsewire::RxDriverArduino::_edgeBuffer

protected

Definition at line 270 of file RxDriverArduino.h.

◆ _frameSize

uint16_t pulsewire::RxDriverArduino::_frameSize = DEFAULT_FRAME_SIZE

protected

Definition at line 267 of file RxDriverArduino.h.

◆ _freqHz

uint32_t pulsewire::RxDriverArduino::_freqHz

protected

Definition at line 266 of file RxDriverArduino.h.

◆ _is_active

volatile bool pulsewire::RxDriverArduino::_is_active = false

protected

Definition at line 277 of file RxDriverArduino.h.

◆ _is_open

volatile bool pulsewire::RxDriverArduino::_is_open = false

protected

Definition at line 278 of file RxDriverArduino.h.

◆ _lastEdge

volatile uint32_t pulsewire::RxDriverArduino::_lastEdge

protected

Definition at line 263 of file RxDriverArduino.h.

◆ _lastLevel

volatile bool pulsewire::RxDriverArduino::_lastLevel

protected

Definition at line 264 of file RxDriverArduino.h.

◆ _maxUs

uint32_t pulsewire::RxDriverArduino::_maxUs = 0

protected

Definition at line 274 of file RxDriverArduino.h.

◆ _minUs

uint32_t pulsewire::RxDriverArduino::_minUs = 0

protected

Definition at line 273 of file RxDriverArduino.h.

◆ _pin

uint8_t pulsewire::RxDriverArduino::_pin

protected

Definition at line 265 of file RxDriverArduino.h.

◆ _rxBuffer

RingBuffer<uint8_t> pulsewire::RxDriverArduino::_rxBuffer

protected

Definition at line 269 of file RxDriverArduino.h.

◆ _timeoutUs

uint32_t pulsewire::RxDriverArduino::_timeoutUs = 0

protected

Definition at line 276 of file RxDriverArduino.h.

◆ _useChecksum

bool pulsewire::RxDriverArduino::_useChecksum = false

protected

Definition at line 275 of file RxDriverArduino.h.

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

src/pulse/RxDriverArduino.h

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ RxDriverArduino()

◆ ~RxDriverArduino()

Member Function Documentation

◆ available()

◆ begin()

◆ checkTimeout()

◆ end()

◆ handleInterrupt()

◆ init()

◆ processEdges()

◆ readBytes()

◆ reset()

◆ setFrameSize()

◆ setRxBufferSize()

Field Documentation

◆ _bitPeriodUs

◆ _codec

◆ _edgeBuffer

◆ _frameSize

◆ _freqHz

◆ _is_active

◆ _is_open

◆ _lastEdge

◆ _lastLevel

◆ _maxUs

◆ _minUs

◆ _pin

◆ _rxBuffer

◆ _timeoutUs

◆ _useChecksum