Panasonic (Kaseikyo) 48-bit IR protocol encoder/decoder. More...

#include <panasonic_codec.hpp>

Inheritance diagram for m5::unit::ir::PanasonicCodec:

Public Member Functions
	PanasonicCodec ()
	Constructor.

item_container_type	encode (uint16_t address, uint16_t command, bool repeat) override
	Encode a 48-bit Panasonic frame from (manufacturer=address, device+function=command)

bool	decode (const gpio::m5_rmt_item_t *items, uint32_t num, DecodeResult &result) override
	Decode a 48-bit Panasonic frame; `result.raw` receives the full 48-bit value.

uint32_t	carrierFrequencyHz () const override
	Carrier frequency for Panasonic (36.7 kHz)

item_container_type	encodeRaw48 (uint64_t data48)
	Encode with explicit 48-bit raw data.

Public Member Functions inherited from m5::unit::ir::IRCodec
	IRCodec (CodecType t)

CodecType	type () const
	Get codec type for safe downcasting.

virtual float	carrierDuty () const
	Carrier duty cycle (0.0 - 1.0)

virtual uint8_t	minFrames () const
	Number of frames that should be transmitted per keypress for this protocol.

virtual uint16_t	frameGapUs () const
	Inter-frame gap (microseconds) when transmitting multiple frames in one burst.

virtual bool	decode (const m5::unit::gpio::m5_rmt_item_t *items, uint32_t num, DecodeResult &result)=0
	Try to decode RMT items into an IR command.

Static Public Member Functions
static uint64_t	encodePanasonic (uint16_t manufacturer, uint8_t device, uint8_t subdevice, uint8_t function)
	Build a 48-bit Panasonic / Kaseikyo frame from structured fields.

Detailed Description

Panasonic (Kaseikyo) 48-bit IR protocol encoder/decoder.

Carrier: 36.7 kHz, duty 1/3
Modulation: Pulse Distance (same as NEC)
Bit order: LSB first
48 bits: Customer Code (16) + Data (32)
Customer code for Panasonic TV: 0x4004
Data: device(8) + subdevice(8) + function(8) + checksum(8)

Timing

Element	Mark (us)	Space (us)
Leader	3500	1750
Bit "1"	425	1275
Bit "0"	425	425
Stop	425	-

API mapping (simple encode(address, command, repeat))

address = manufacturer / customer code (e.g. 0x4004 for Panasonic TV)
command = (device << 8) | function, subdevice is fixed to 0
checksum = device ^ subdevice ^ function (auto-computed)
result.raw (decode) holds the full 48-bit frame for post-processing.

For full control (non-zero subdevice, custom manufacturer codes), use the static helper encodePanasonic(manufacturer, device, subdevice, function) and feed the returned 48-bit value to encodeRaw48().

Member Function Documentation

◆ carrierFrequencyHz()

uint32_t m5::unit::ir::PanasonicCodec::carrierFrequencyHz ( ) const

inlineoverridevirtual

Carrier frequency for Panasonic (36.7 kHz)

Implements m5::unit::ir::IRCodec.

◆ encode()

item_container_type m5::unit::ir::PanasonicCodec::encode	(	uint16_t	address,
		uint16_t	command,
		bool	repeat )

overridevirtual

Encode a 48-bit Panasonic frame from (manufacturer=address, device+function=command)

Implements m5::unit::ir::IRCodec.

◆ encodePanasonic()

static uint64_t m5::unit::ir::PanasonicCodec::encodePanasonic	(	uint16_t	manufacturer,
		uint8_t	device,
		uint8_t	subdevice,
		uint8_t	function )

inlinestatic

Build a 48-bit Panasonic / Kaseikyo frame from structured fields.

Parameters

manufacturer	16-bit manufacturer / customer code (e.g. 0x4004 for Panasonic TV)
device	8-bit device identifier
subdevice	8-bit sub-device
function	8-bit function

Returns: 48-bit raw frame with correct checksum (device ^ subdevice ^ function)

Note: Pair with encodeRaw48() to transmit the result, or decode -> compare against this to verify a captured frame at application level.

◆ encodeRaw48()

item_container_type m5::unit::ir::PanasonicCodec::encodeRaw48 ( uint64_t data48 )

Encode with explicit 48-bit raw data.