Crate culvert_async 

Async typed access to the HDMI 2.1 SCDC (Status and Control Data Channel) register map.

culvert-async is the async companion to culvert: culvert::Scdc’s methods as async fns over an hdmi_hal_async::scdc::ScdcTransport. The register map is culvert’s culvert::codec; this crate only performs the reads and writes, so the sync and async clients always agree.

All register types and error types are re-exported from culvert so that callers do not need to depend on both crates, and the transport trait and its Send twin from hdmi-hal-async. culvert’s I/O-free encoders and decoders, culvert::codec, are not re-exported: code that needs them depends on culvert.

Features

• plumbob-async — implements plumbob_async::ScdcClient for Scdc<T>, connecting culvert-async to the async FRL link training state machine.

Structs

CedCount

A 15-bit character error count decoded from an ERR_DET register pair.

CedCounters

Per-lane character error counts decoded from ERR_DET registers (0x50–0x55 for lanes 0–2, 0x57–0x58 for lane 3).

ClearableUpdateFlags

The Update_0 flags a source may clear: every flag but RR_Test (bit 2).

Config0

Content written to Config_0 (0x30).

FfeLevels

FFE (Feed-Forward Equalization) levels written into Config_1 bits[7:4]: the highest TxFFE level index the source supports for the requested rate.

FrlConfig

Configuration written to Config_1 (0x31). Build one with new.

LtpRequests

Per-lane link training pattern requests from Status_Flags_1 (0x41) and Status_Flags_2 (0x42).

RsCorrectionCount

A 15-bit Reed-Solomon correction count decoded from RS_Correction_L/H (0x59/0x5A).

Scdc

Async typed client for the HDMI 2.1 SCDC (Status and Control Data Channel) register map.

ScramblerStatus

Decoded content of Scrambler_Status (0x21).

SourceTestConfig

Decoded content of Source_Test_Configuration (0x35).

StatusFlags

Decoded content of Status_Flags_0 (0x40).

TmdsConfig

Configuration written to TMDS_Config (0x20).

UpdateFlags

Decoded content of Update_0 (0x10).

Enums

FrlRate

Maximum Fixed Rate Link (FRL) bandwidth supported by a HDMI 2.1 sink.

LtpReq

Link Training Pattern requested by the sink for one lane: a 4-bit field in Status_Flags_1 (0x41, lanes 0–1) or Status_Flags_2 (0x42, lanes 2–3).

ProtocolError

What culvert refuses because it would violate the SCDC protocol.

ScdcError

Errors returned by Scdc register operations.

Traits

ScdcTransport

The async transport Scdc<T> is generic over, re-exported from hdmi-hal-async. Async raw register access to the SCDC register map over DDC/I²C.

SendScdcTransport

The transport’s Send twin, re-exported from hdmi-hal-async: bound generic code by it to spawn work through Scdc<T> on a multi-threaded executor. ScdcTransport with Send futures, for code that spawns link training on a multi-threaded executor.