BFE Engineering
c756622c96
The repo's documentation framed it as a support repo for one product (WardenOS). Since going public the real audience is anyone with a Luckfox Pico 86 Panel: a maintained 6.18 kernel, an off-device development loop, and a device simulator that exist nowhere else for this board. Reframe the README and top-level docs board-first, with WardenOS documented as the downstream consumer it is (ADR-0008). Also an editorial pass over the whole doc set: - every H1/H2 is now a short title, not a sentence (ADRs, qemu/, patches/, drivers/, architecture, NPU feasibility, config-lint, payload); workflow flowchart titles fixed at the source in tools/flowgen.py and regenerated with fresh bench numbers - README Quick Start commands verified against the scripts; requirements corrected (curl, bare python, gcc >= 14) and the MC/DC gate added as a step (run green locally on gcc 14.2) - dropped the 'needs python (not python3)' vendor dig: build-kernel.sh inherited the same requirement (filed #10 to remove it) - glossed MC/DC and HPMCU on first use; marked the tests/uboot-ab reference as flare-edge; deduplicated the three-simulator list into the root README table
19 lines
517 B
Markdown
19 lines
517 B
Markdown
# Modbus RTU Round Trip
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> **Outcome tested:** A well-formed request yields the right registers; a bad one a defined fault.
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**Benchmark** (`modbus_read_holding`): 73.7 ns/op
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```mermaid
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flowchart TD
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A[frame in] --> B{addr == mine\nor broadcast?}
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B -- no --> Z[ignore]
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B -- yes --> C{CRC ok?}
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C -- no --> Z
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C -- yes --> D{function code}
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D -- 0x03 read-holding --> E{range in bounds?}
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E -- no --> X[exception 0x02]
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E -- yes --> R[registers response + CRC]
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D -- unsupported --> X2[exception 0x01]
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```
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