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RTOS, Timing, and Firmware Architecture
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Topic starter
27/06/2026 9:36 pm
This thread collects the questions that come up over and over in embedded firmware architecture reviews.
- When is bare metal still the better choice?
- When does an RTOS reduce risk instead of adding complexity?
- How should watchdog servicing be structured?
- Where should retry logic, state machines, and fault recovery live?
- How do you keep ISR, task, and driver boundaries clean?
My default advice is simple: make ownership obvious, keep time-critical paths measurable, and avoid hiding hardware behavior behind abstractions nobody can debug at 2 a.m.
If you have a concrete timing or architecture issue, open a separate thread and link back here.