Files
bfe-core1106-sdk/docs/workflows/relay-drive.md
BFE Engineering 42fb386f60 docs: ASCII typography and style normalization across all repo text
Replace every em dash with real punctuation (rewrites, not hyphen swaps)
in docs, code comments, scripts, configs, and the port records; convert
en dashes, curly quotes, ellipsis glyphs, arrows, and section signs to
ASCII; drop machine-writing tell phrases from living docs. ADR titles
now use a colon. The M2 bring-up DTS model string carried an em dash
into the patch series and its record echoes; fixed at both, and the full
series re-verified to apply cleanly onto pristine 6.18.46. One comment
in freshness.h deliberately names the em dash glyph the UI renders as
the unknown mark; that is data, kept as prose naming it.

Verified: cargo tests (sim, config-lint, rs485-bridge), shellcheck,
both driver MC/DC harnesses, patches-apply.
2026-08-31 12:31:27 -06:00

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Markdown

# Relay Drive
> **Outcome tested:** A relay is exported transparently and driven without disturbing a held contact.
**Coverage**: relays.c: 40/40 conditions, 100% MC/DC (CI-enforced)
```mermaid
flowchart TD
A[warden_relay_set idx,on] --> B{idx < COUNT?}
B -- no --> Z[no-op]
B -- yes --> C{exported?}
C -- no --> D[write export] --> E{exported now?}
E -- no --> Z2[give up]
E -- yes --> F
C -- yes --> F[read direction]
F --> G{dir == out?}
G -- no --> H[preserve level: read value,\nwrite high/low]
G -- yes --> I
H --> I[write value = on?1:0]
```