ecu-tests/docs/05_architecture_overview.md

Architecture Overview

This document provides a high-level view of the framework’s components and how they interact, plus a Mermaid diagram for quick orientation.

Components

• Tests (pytest) — test modules and functions under tests/
• Fixtures — defined in tests/conftest.py (config, lin, flash_ecu)
• Config Loader — ecu_framework/config.py (YAML → dataclasses)
• LIN Abstraction — ecu_framework/lin/base.py (LinInterface, LinFrame)
• Mock LIN Adapter — ecu_framework/lin/mock.py
• BabyLIN Adapter — ecu_framework/lin/babylin.py (SDK wrapper → BabyLIN_library.py)
• Flasher — ecu_framework/flashing/hex_flasher.py
• Power Supply (PSU) control — ecu_framework/power/owon_psu.py (serial SCPI)
• PSU tryout script — vendor/Owon/tryout.py
• Reporting Plugin — conftest_plugin.py (docstring → report metadata)
• Reports — reports/report.html, reports/junit.xml

Mermaid architecture diagram

flowchart TB
  subgraph Tests & Pytest
    T[tests/*]
    CF[tests/conftest.py]
    PL[conftest_plugin.py]
  end

  subgraph Framework
    CFG[ecu_framework/config.py]
    BASE[ecu_framework/lin/base.py]
    MOCK[ecu_framework/lin/mock.py]
    BABY[ecu_framework/lin/babylin.py]
    FLASH[ecu_framework/flashing/hex_flasher.py]
    POWER[ecu_framework/power/owon_psu.py]
  end

  subgraph Artifacts
    REP[reports/report.html<br/>reports/junit.xml]
  YAML[config/*.yaml<br/>babylin.example.yaml<br/>test_config.yaml]
    PSU_YAML[config/owon_psu.yaml<br/>OWON_PSU_CONFIG]
    SDK[vendor/BabyLIN_library.py<br/>platform-specific libs]
    OWON[vendor/Owon/tryout.py]
  end

  T --> CF
  CF --> CFG
  CF --> BASE
  CF --> MOCK
  CF --> BABY
  CF --> FLASH
  T --> POWER
  PL --> REP

  CFG --> YAML
  CFG --> PSU_YAML
  BABY --> SDK
  T --> OWON
  T --> REP

Data and control flow summary

• Tests use fixtures to obtain config and a connected LIN adapter
• Config loader reads YAML (or env override), returns typed dataclasses
• LIN calls are routed through the interface abstraction to the selected adapter
• Flasher (optional) uses the same interface to program the ECU
• Power supply control (optional) uses ecu_framework/power/owon_psu.py and reads config.power_supply (merged with config/owon_psu.yaml or OWON_PSU_CONFIG when present); the tryout script under vendor/Owon/ provides a quick manual flow
• Reporting plugin parses docstrings and enriches the HTML report

Extending the architecture

• Add new bus adapters by implementing LinInterface
• Add new report sinks (e.g., JSON or a DB) by extending the plugin
• Add new fixtures for diagnostics or measurement tools (Scopes, power supplies, etc.)