Clean Fracanto #5 — The Interplay

Why These Principles Are No Coincidence

The four principles — Clean Architecture, SOLID, DRY, and KISS — are not independent decisions in fracanto but facets of the same fundamental idea: control dependencies, guarantee interchangeability, preserve simplicity.

The vtable pattern is the technical lever that serves all four principles simultaneously:

• It creates the boundaries for Clean Architecture (layer separation).
• It implements DIP and OCP from SOLID (dependency inversion, extensibility).
• It is the single representation for polymorphism in C (DRY).
• It is the simplest mechanism that enables interchangeability in C (KISS).

Dependency Injection complements the vtable pattern at the driver level and closes the final gap: Not only are framework layers interchangeable, but so are the hardware accesses within individual drivers. Together, both patterns form a consistent, minimal toolset that carries the entire architecture — from CAN ID encoding to DMA-based audio processing.

The result: A concrete module like fragesymo implements 16 callbacks and receives CAN communication, state management, signal routing, audio pipeline, and UI handling in return. The framework is complex in its totality but simple in every individual interaction.