hislip.h File Reference

HiSLIP (High-Speed LAN Instrument Protocol) message codec (PC_ENABLE_HISLIP) - a zero-heap codec for the IVI Foundation's modern LXI instrument transport (IVI-6.1, HiSLIP 2.0) on TCP port 4880, the successor to VXI-11 that carries SCPI at higher throughput. More...

#include "protocore_config.h"

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Detailed Description

HiSLIP (High-Speed LAN Instrument Protocol) message codec (PC_ENABLE_HISLIP) - a zero-heap codec for the IVI Foundation's modern LXI instrument transport (IVI-6.1, HiSLIP 2.0) on TCP port 4880, the successor to VXI-11 that carries SCPI at higher throughput.

A HiSLIP session runs over TWO TCP connections to the same port 4880 - a synchronous channel (the ordered SCPI command/response stream: Data / DataEND, Trigger, device-clear) and an asynchronous channel (out-of-band control: lock, status/SRQ, remote-local, interrupt) - bound by a 16-bit SessionID negotiated in the handshake.

Every message is a fixed 16-byte header optionally followed by a payload:

"HS" (2)  MessageType (1)  ControlCode (1)  MessageParameter (4, BE)  PayloadLength (8, BE)

This codec builds + parses that header (pc_hislip_build_header / pc_hislip_parse_header), the Initialize / AsyncInitialize handshake (the MessageParameter carries the protocol version + vendor id, then the negotiated version + SessionID), and the Data / DataEND messages that carry a SCPI payload keyed by a MessageID. Pairs with PC_ENABLE_SCPI (the payload). Pure codec, host-tested; the two TCP connections are the application's.

Reference: IVI-6.1 "IVI High-Speed LAN Instrument Protocol (HiSLIP)" v2.0 (2020-04-23).

Author

Douglas Quigg (dstroy0)

Date

2026

Definition in file hislip.h.