Module hdlc 

HDLC-Lite framing for asynchronous serial links (UART, USB-CDC).

Same discipline as Spinel’s HDLC-Lite: frames are delimited by 0x7E flag bytes, control bytes inside a frame are escaped with 0x7D (XOR 0x20), and each frame carries a trailing 16-bit FCS (CRC-16/X-25 per RFC 1662), least-significant byte first.

Structs

Decoder

Streaming decoder with an internal reassembly buffer of N bytes.

Enums

DecodeError

EncodeError

Constants

ESCAPE

Escape byte; the following byte is XORed with ESCAPE_XOR.

ESCAPE_XOR

XOR applied to escaped bytes.

FLAG

Frame delimiter.

Functions

crc16

RFC 1662 FCS-16 (CRC-16/X-25) over data.

encode_frame

Encode one frame, including both delimiting flags, into out.

max_encoded_len

Worst-case encoded size for a payload of payload_len bytes.