m5::unit::ir::MitsubishiCodec Class Reference

Mitsubishi 16-bit IR protocol encoder/decoder. More...

#include <mitsubishi_codec.hpp>

Inheritance diagram for m5::unit::ir::MitsubishiCodec:

Public Member Functions
	MitsubishiCodec ()
	Constructor.
item_container_type	encode (uint16_t address, uint16_t command, bool repeat) override
	Encode a single 16-bit Mitsubishi frame (UnitIR::send() replicates per minFrames())
bool	decode (const gpio::m5_rmt_item_t *items, uint32_t num, DecodeResult &result) override
	Decode a single 16-bit Mitsubishi frame (16 data items + trailing stop mark)
uint32_t	carrierFrequencyHz () const override
	Carrier frequency for Mitsubishi (33 kHz)
uint8_t	minFrames () const override
	Mitsubishi requires the frame to be sent twice per keypress.
uint16_t	frameGapUs () const override
	Inter-frame gap ≈ 28.5 ms as used by real Mitsubishi remotes.
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 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.

Detailed Description

Mitsubishi 16-bit IR protocol encoder/decoder.

• Carrier: 33 kHz
• Modulation: Pulse Distance (no leader/header)
• Bit order: MSB first
• 16 bits, data sent twice with ~28ms gap
• No leader pulse (data starts immediately)

Timing

Element	Mark (us)	Space (us)
Bit "1"	300	2100
Bit "0"	300	900
Stop	300	-
Gap	-	~28500

API mapping

• address = 0 (unused)
• command = full 16-bit data value

Note

encode() emits a single 16-bit frame. Real Mitsubishi remotes always send the frame twice per keypress, so minFrames() returns 2 and UnitIR::send() replicates the frame automatically (with frameGapUs() ≈ 28.5ms between them).

Member Function Documentation

carrierFrequencyHz()

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

inlineoverridevirtual

Carrier frequency for Mitsubishi (33 kHz)

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

encode()

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

overridevirtual

Encode a single 16-bit Mitsubishi frame (UnitIR::send() replicates per minFrames())

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

frameGapUs()

uint16_t m5::unit::ir::MitsubishiCodec::frameGapUs ( ) const

inlineoverridevirtual

Inter-frame gap ≈ 28.5 ms as used by real Mitsubishi remotes.

Reimplemented from m5::unit::ir::IRCodec.

minFrames()

uint8_t m5::unit::ir::MitsubishiCodec::minFrames ( ) const

inlineoverridevirtual

Mitsubishi requires the frame to be sent twice per keypress.

Reimplemented from m5::unit::ir::IRCodec.