Practical Driver Abstractions
Good driver abstractions keep hardware details localized while staying efficient. Aim for simple interfaces that are easy to test and reuse.
Separate HAL from device logic
Keep low-level register access in a thin HAL layer and build device-specific logic on top.
Use dependency injection
Pass interfaces for I/O and timing to make drivers testable without hardware.
Minimize dynamic allocation
Prefer static buffers and fixed-size queues for deterministic behavior.
Small, explicit APIs outperform complex abstractions in embedded systems.