m5::unit::ir::Rc6Codec Class Reference

Philips RC6 Mode 0 IR protocol encoder/decoder. More...

#include <rc6_codec.hpp>

Inheritance diagram for m5::unit::ir::Rc6Codec:

Public Member Functions
	Rc6Codec ()
	Constructor.
item_container_type	encode (uint16_t address, uint16_t command, bool repeat) override
	Encode an RC6 Mode 0 frame (21 bits: SB+Mode+Trailer+Addr+Cmd)
bool	decode (const gpio::m5_rmt_item_t *items, uint32_t num, DecodeResult &result) override
	Decode an RC6 Mode 0 Manchester frame (with 2t-wide trailer bit)
uint32_t	carrierFrequencyHz () const override
	Carrier frequency for RC6 (36 kHz)
bool	toggle () const
	Toggle bit state.
void	setToggle (bool t)
	Set toggle bit.
void	flipToggle ()
	Flip toggle bit.
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.

Detailed Description

Philips RC6 Mode 0 IR protocol encoder/decoder.

• Carrier: 36 kHz, duty 1/3
• Modulation: Manchester (bi-phase), opposite polarity to RC5
• 1t = 444us (16 cycles of 36kHz)
• Leader: 6t mark + 2t space
• Frame: SB(1) + Mode(3) + Trailer(1,2t) + Address(8) + Command(8) = 21 bits
• RC6 polarity: "0" = space+mark, "1" = mark+space (opposite of RC5)
• Trailer bit uses 2t half-bit width (double the normal 1t)

Member Function Documentation

carrierFrequencyHz()

uint32_t m5::unit::ir::Rc6Codec::carrierFrequencyHz ( ) const

inlineoverridevirtual

Carrier frequency for RC6 (36 kHz)

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

encode()

item_container_type m5::unit::ir::Rc6Codec::encode ( uint16_t address, uint16_t command, bool repeat )

overridevirtual

Encode an RC6 Mode 0 frame (21 bits: SB+Mode+Trailer+Addr+Cmd)

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

setToggle()

void m5::unit::ir::Rc6Codec::setToggle ( bool t )

inline

Set toggle bit.

Parameters

t	New toggle value; the next encode() emits this bit as the trailer

toggle()

bool m5::unit::ir::Rc6Codec::toggle ( ) const

inline

Toggle bit state.

Returns

Current toggle (trailer-bit) value