Change Note 2026-07-31

Entity Component System (ECS) for real-time control – evaluation round 2: the store mechanised

ECS for Control – Round 2

The second round of the Entity Component System (ECS) evaluation for real-time control programs written in Astrobe Oberon. What the first round performed by discipline and review is now mechanised: each System declares its store access, the schedule is derived from the declarations, and the construction is checked before the first tick. The round comprises one example program, EcsControlStore, and six documents in their own section; the first round's set stands unchanged as its record.

This remains evaluation work, not part of the core framework.

The documents:

• ECS for Control — Concepts – the architecture, platform-neutral; the second edition of the round-1 concepts document.

• ECS for Control — Implementation Concepts – new: how the architecture is realised in Oberon on a microcontroller, element by element, with the program's code.

• EcsControlStore – the EcsControlStore program: its world, its Systems, its wiring, and what it does on the bench – including the construction checks shown failing on purpose.

• ECS for Control — Round 2 Lessons Learned – what building it taught, at the concept and the implementation level.

• ECS for Control — Round 1 Retrospective – a new document kind: the round-1 outlook tracked against what this round delivered, verdict by verdict.

• ECS for Control — Round 2 Outlook – where the evaluation goes next.

Example Program

• EcsControlStore is in <repo>/examples/v3.2/rpi/pico2/EcsControlStore/EcsControlStore-v12, for the RP2350 (Pico2), based on lib/v3.2.

• The example is self-contained together with its own lib directory, which carries the evaluation's candidate framework material; the installed lib/v3.2 is untouched.

• The program compiles and runs on the target hardware.

Last updated: 31 July 2026