Crate uart_fpl 

UART Framing Protocol Library (uart_fpl).

Provides binary packet framing, streaming parsing with preamble synchronization, CRC-8 header protection, Channel 0 dynamic protocol negotiation, and sliding-window flow control primitives for reliable transport over serial links.

Structs

AckTracker

Thread-safe cumulative ACK tracker with waker notifications.

Frame

Wire representation of a parsed UART protocol frame emitted by crate::FrameParser.

FrameParser

Streaming parser for continuous byte streams from serial interfaces.

HandshakeResponse

Structured handshake response containing negotiation status and selected protocol.

HostHandshake

Host-side handshake coordinator.

ResendReceiver

Go-Back-N receiver state machine.

ResendSender

Go-Back-N sliding-window sender state machine.

RetransmissionLimitExceeded

Error emitted when consecutive Go-Back-N retransmission timeouts exceed the configured limit.

TargetHandshake

Target-side handshake coordinator.

UnexpectedSeqError

Error emitted when an incoming sequence number does not match the expected sequence number.

Enums

AckOutcome

Outcome of processing an acknowledgment sequence number in the sender.

FrameError

Errors that can occur during packet encoding or frame validation.

FrameStatus

Status of an incoming frame evaluated against the receiver window.

FrameType

Protocol frame type indicator.

HandshakeError

Errors that can occur during Channel 0 protocol negotiation.

HandshakeStatus

Negotiation status reported by the target in a handshake response.

ProtocolId

Protocol version identifier negotiated during handshake.

Constants

CONTROL_CHANNEL_ID

Reserved logical channel identifier for handshake negotiation and link control.

DEFAULT_MAX_RETRANSMISSION_ATTEMPTS

Maximum consecutive retransmission timeouts before the transport session fails.

DEFAULT_RETRANSMISSION_TIMEOUT

Default retransmission timeout duration for Go-Back-N recovery (1,000 ms).

DEFAULT_WINDOW_SIZE

Default sliding window size for ResendSP (number of frames in flight).

MAX_FRAME_SIZE

Maximum total wire size in bytes of an encoded frame (header + payload + CRC-32).

MAX_PAYLOAD_SIZE

Maximum payload size in bytes accepted by framing encoders and parsers.

Functions

encode_frame

Serializes and encodes a protocol frame with the 13-byte binary header, 1-byte header checksum (HdrChk), and trailing CRC-32 checksum.