Module fifo_queue 

Modbus FIFO Queue Models

This module provides the data structures and logic for handling Read FIFO Queue (Function Code 0x18).

A FIFO (First-In-First-Out) queue in Modbus is a specialized structure where a set of registers can be read from a single pointer address. This is often used for data logging or buffering where multiple data points are collected and read in bulk.

Key Features

• Fixed-Size Storage: Uses a fixed-size array to store up to 31 registers, aligning with the Modbus protocol limits.
• no_std Compatible: Designed for embedded systems without heap allocation.
• Safe Access: Provides a clean API to retrieve the pointer address and the sequence of register values.

Structs

FifoQueue

A collection of register values retrieved from a Modbus FIFO queue.

Constants

MAX_FIFO_QUEUE_COUNT_PER_PDU

The maximum number of 16-bit registers that can be returned in a single Read FIFO Queue (FC 24) response.