Add Owon power supply library, and test cases

README.md

@@ -15,6 +15,8 @@ Python-based ECU testing framework built on pytest, with a pluggable LIN communi
 
 - Using the framework (common runs, markers, CI, Pi): `docs/12_using_the_framework.md`
 - Plugin overview (reporting, hooks, artifacts): `docs/11_conftest_plugin_overview.md`
+ - Power supply (Owon) usage and troubleshooting: `docs/14_power_supply.md`
+ - Report properties cheatsheet (standard keys): `docs/15_report_properties_cheatsheet.md`
 
 ## TL;DR quick start (copy/paste)
 
@@ -203,6 +205,64 @@ The `ecu_framework/lin/babylin.py` implementation uses the official `BabyLIN_lib
 - Permission errors in PowerShell: run the venv's full Python path or adjust ExecutionPolicy for scripts.
 - Import errors: activate the venv and reinstall `requirements.txt`.
 
+## Owon Power Supply (SCPI) — library, config, tests, and tryout
+
+We provide a reusable pyserial-based library, a hardware test integrated with the central config,
+and a minimal tryout script.
+
+- Library: `ecu_framework/power/owon_psu.py` (class `OwonPSU`, `SerialParams`, `scan_ports`)
+- Central config: `config/test_config.yaml` (`power_supply` section)
+  - Optionally merge `config/owon_psu.yaml` or set `OWON_PSU_CONFIG` to a YAML path
+- Hardware test: `tests/hardware/test_owon_psu.py` (skips unless `power_supply.enabled` is true)
+- Tryout: `vendor/Owon/tryout.py` (reads `OWON_PSU_CONFIG` or `config/owon_psu.yaml`)
+
+Quick setup (Windows PowerShell):
+
+```powershell
+# Ensure dependencies
+pip install -r .\requirements.txt
+
+# Option A: configure centrally in test_config.yaml
+#   Edit config\test_config.yaml and set:
+#   power_supply.enabled: true
+#   power_supply.port: COM4
+
+# Option B: use a separate machine-specific YAML
+copy .\config\owon_psu.example.yaml .\config\owon_psu.yaml
+# edit COM port and options in .\config\owon_psu.yaml
+
+# Run the hardware PSU test (skips if disabled or missing port)
+pytest -k test_owon_psu_idn_and_optional_set -m hardware -q
+
+# Run the tryout script
+python .\vendor\Owon\tryout.py
+```
+
+YAML keys supported by `power_supply`:
+
+```yaml
+power_supply:
+  enabled: true
+  port: COM4           # or /dev/ttyUSB0
+  baudrate: 115200
+  timeout: 1.0
+  eol: "\n"          # or "\r\n"
+  parity: N            # N|E|O
+  stopbits: 1          # 1|2
+  xonxoff: false
+  rtscts: false
+  dsrdtr: false
+  idn_substr: OWON
+  do_set: false
+  set_voltage: 5.0
+  set_current: 0.1
+```
+
+Troubleshooting:
+- If `*IDN?` is empty, confirm port, parity/stopbits, and `eol` (try `\r\n`).
+- On Windows, if COM>9, use `\\.\COM10` style in some tools; here plain `COM10` usually works.
+- Ensure only one program opens the COM port at a time.
+
 ## Next steps
 
 - Replace `HexFlasher` with a production flashing routine (UDS)

TESTING_FRAMEWORK_GUIDE.md

@@ -304,6 +304,41 @@ The enhanced HTML report includes:
 - YAML configuration loading: ✅ Working
 - Environment variable override: ✅ Working
 - BabyLIN SDF/schedule configuration: ✅ Working
+ - Power supply (PSU) configuration: ✅ Working (see `config/test_config.yaml` → `power_supply`)
+
+## Owon Power Supply (PSU) Integration
+
+The framework includes a serial SCPI controller for Owon PSUs and a hardware test wired to the central config.
+
+- Library: `ecu_framework/power/owon_psu.py` (pyserial)
+- Config: `config/test_config.yaml` (`power_supply` section)
+  - Optionally merge machine-specific settings from `config/owon_psu.yaml` or env `OWON_PSU_CONFIG`
+- Hardware test: `tests/hardware/test_owon_psu.py` (skips unless `power_supply.enabled` and `port` present)
+- Tryout: `vendor/Owon/tryout.py`
+
+Quick run:
+
+```powershell
+pip install -r .\requirements.txt
+copy .\config\owon_psu.example.yaml .\config\owon_psu.yaml
+# edit COM port in .\config\owon_psu.yaml
+pytest -k test_owon_psu_idn_and_optional_set -m hardware -q
+python .\vendor\Owon\tryout.py
+```
+
+Common config keys:
+
+```yaml
+power_supply:
+  enabled: true
+  port: COM4
+  baudrate: 115200
+  timeout: 1.0
+  eol: "\n"
+  parity: N
+  stopbits: 1
+  idn_substr: OWON
+```
 
 ## Next Steps
 

config/owon_psu.example.yaml

@@ -0,0 +1,18 @@
+# Example configuration for Owon PSU hardware test
+# Copy to config/owon_psu.yaml and adjust values for your setup
+
+port: COM4           # e.g., COM4 on Windows, /dev/ttyUSB0 on Linux
+baudrate: 115200     # default 115200
+timeout: 1.0         # seconds
+# eol: "\n"         # write/query line termination (default "\n"); use "\r\n" if required
+# parity: N          # N|E|O (default N)
+# stopbits: 1        # 1 or 2 (default 1)
+# xonxoff: false
+# rtscts: false
+# dsrdtr: false
+
+# Optional assertions/behavior
+# idn_substr: OWON     # require this substring in *IDN?
+# do_set: true         # briefly set V/I and toggle output
+# set_voltage: 1.0     # volts when do_set is true
+# set_current: 0.1     # amps when do_set is true

config/owon_psu.yaml

@@ -0,0 +1,18 @@
+# Example configuration for Owon PSU hardware test
+# Copy to config/owon_psu.yaml and adjust values for your setup
+
+port: COM4           # e.g., COM4 on Windows, /dev/ttyUSB0 on Linux
+baudrate: 115200     # default 115200
+timeout: 1.0         # seconds
+eol: "\n"         # write/query line termination (default "\n"); use "\r\n" if required
+parity: N          # N|E|O (default N)
+stopbits: 1        # 1 or 2 (default 1)
+xonxoff: false
+rtscts: false
+dsrdtr: false
+
+# Optional assertions/behavior
+idn_substr: OWON     # require this substring in *IDN?
+do_set: true         # briefly set V/I and toggle output
+set_voltage: 10.0     # volts when do_set is true
+set_current: 0.1     # amps when do_set is true

config/test_config.yaml

@@ -5,3 +5,21 @@ interface:
 flash:
   enabled: false
   hex_path:
+
+# Optional: central power supply config used by hardware tests/demos
+# You can also place machine-specific values in config/owon_psu.yaml or set OWON_PSU_CONFIG
+power_supply:
+  enabled: true
+  # port: COM4
+  baudrate: 115200
+  timeout: 1.0
+  eol: "\n"
+  parity: N
+  stopbits: 1
+  xonxoff: false
+  rtscts: false
+  dsrdtr: false
+  # idn_substr: OWON
+  do_set: false
+  set_voltage: 1.0
+  set_current: 0.1

conftest.py

@@ -0,0 +1,27 @@
+"""
+Pytest configuration for this repository.
+
+Purpose:
+- Optionally register the local plugin in `conftest_plugin.py` if present.
+- Avoid hard failures on environments where that file isn't available.
+"""
+from __future__ import annotations
+
+import importlib
+import sys
+from typing import Any
+
+
+def pytest_configure(config: Any) -> None:
+    try:
+        plugin = importlib.import_module("conftest_plugin")
+    except Exception as e:
+        # Soft warning only; tests can still run without the extra report features.
+        sys.stderr.write(f"[pytest] conftest_plugin not loaded: {e}\n")
+        return
+
+    # Register the plugin module so its hooks are active.
+    try:
+        config.pluginmanager.register(plugin, name="conftest_plugin")
+    except Exception as reg_err:
+        sys.stderr.write(f"[pytest] failed to register conftest_plugin: {reg_err}\n")

docs/01_run_sequence.md

@@ -27,6 +27,7 @@ sequenceDiagram
   participant T as Test Discovery (tests/*)
   participant F as Fixtures (conftest.py)
   participant C as Config Loader (ecu_framework/config.py)
+  participant PS as Power Supply (optional)
   participant L as LIN Adapter (mock/BabyLIN SDK)
   participant X as HexFlasher (optional)
   participant R as Reports (HTML/JUnit)
@@ -45,6 +46,9 @@ sequenceDiagram
     F->>X: HexFlasher(lin).flash_hex(hex_path)
     X-->>F: Flash result (ok/fail)
   end
+  opt power_supply.enabled and port provided
+    Note over PS: Tests/tryouts may open PSU via ecu_framework.power.owon_psu
+  end
   loop for each test
     P->>PL: runtest_makereport(item, call)
     Note over PL: Parse docstring and attach metadata
@@ -68,6 +72,7 @@ Session fixture: config()
   → calls ecu_framework.config.load_config(workspace_root)
     → determines config file path by precedence
     → merges YAML + overrides into dataclasses (EcuTestConfig)
+    → optionally merges config/owon_psu.yaml (or OWON_PSU_CONFIG) into power_supply
   ↓
 Session fixture: lin(config)
   → chooses interface by config.interface.type

docs/02_configuration_resolution.md

@@ -25,6 +25,15 @@ From highest to lowest precedence:
   - `flash: FlashConfig`
     - `enabled`: whether to flash before tests
     - `hex_path`: path to HEX file
+  - `power_supply: PowerSupplyConfig`
+    - `enabled`: whether PSU features/tests are active
+    - `port`: Serial device (e.g., `COM4`, `/dev/ttyUSB0`)
+    - `baudrate`, `timeout`, `eol`: line settings (e.g., `"\n"` or `"\r\n"`)
+    - `parity`: `N|E|O`
+    - `stopbits`: `1` or `2`
+    - `xonxoff`, `rtscts`, `dsrdtr`: flow control flags
+    - `idn_substr`: optional substring to assert in `*IDN?`
+    - `do_set`, `set_voltage`, `set_current`: optional demo/test actions
 
 ## YAML examples
 
@@ -52,6 +61,26 @@ interface:
 flash:
   enabled: true
   hex_path: "firmware/ecu_firmware.hex"
+
+Power supply configuration (either inline or merged from a dedicated YAML):
+
+```yaml
+power_supply:
+  enabled: true
+  port: COM4           # or /dev/ttyUSB0 on Linux
+  baudrate: 115200
+  timeout: 1.0
+  eol: "\n"          # or "\r\n" if your device requires CRLF
+  parity: N            # N|E|O
+  stopbits: 1          # 1|2
+  xonxoff: false
+  rtscts: false
+  dsrdtr: false
+  idn_substr: OWON
+  do_set: false
+  set_voltage: 5.0
+  set_current: 0.1
+```
 ```
 
 ## Load flow
@@ -64,6 +93,14 @@ tests/conftest.py: config() fixture
     → else use defaults
   → convert dicts to EcuTestConfig dataclasses
   → provide to other fixtures/tests
+
+Additionally, if present, a dedicated PSU YAML is merged into `power_supply`:
+
+- Environment variable `OWON_PSU_CONFIG` (path to YAML), else
+- `config/owon_psu.yaml` under the workspace root
+
+This lets you keep machine-specific serial settings separate while still having
+central defaults in `config/test_config.yaml`.
 ```
 
 ## How tests and adapters consume config
@@ -72,6 +109,10 @@ tests/conftest.py: config() fixture
 - Mock adapter uses `bitrate` and `channel` to simulate timing/behavior
 - BabyLIN adapter (SDK wrapper) uses `sdf_path`, `schedule_nr`, `channel` to open the device, load the SDF, and start a schedule. `bitrate` is informational unless explicitly applied via commands/SDF.
 - `flash_ecu` uses `flash.enabled` and `flash.hex_path`
+- PSU-related tests or utilities read `config.power_supply` for serial parameters
+  and optional actions (IDN assertions, on/off toggle, set/measure). The reference
+  implementation is `ecu_framework/power/owon_psu.py`, with a hardware test in
+  `tests/hardware/test_owon_psu.py` and a tryout script in `vendor/Owon/tryout.py`.
 
 ## Tips
 
@@ -79,3 +120,5 @@ tests/conftest.py: config() fixture
 - Check path validity for `sdf_path` and `hex_path` before running hardware tests
 - Ensure `vendor/BabyLIN_library.py` and the platform-specific libraries from the SDK are available on `PYTHONPATH`
 - Use environment-specific YAML files for labs vs. CI
+- For PSU, prefer `OWON_PSU_CONFIG` or `config/owon_psu.yaml` to avoid committing
+  local COM port settings. Central defaults can live in `config/test_config.yaml`.

docs/03_reporting_and_metadata.md

@@ -85,3 +85,25 @@ Declared in `pytest.ini` and used via `@pytest.mark.<name>` in tests. They also
 - Add more columns to HTML by updating `pytest_html_results_table_header/row`
 - Persist full metadata (steps, expected) to a JSON file after the run for audit trails
 - Populate requirement coverage map by scanning markers and aggregating results
+
+## Runtime properties (record_property) and the `rp` helper fixture
+
+Beyond static docstrings, you can attach dynamic key/value properties during a test.
+
+- Built-in: `record_property("key", value)` in any test
+- Convenience: use the shared `rp` fixture which wraps `record_property` and also prints a short line to captured output for quick scanning.
+
+Example usage:
+
+```python
+def test_example(rp):
+  rp("device", "mock")
+  rp("tx_id", "0x12")
+  rp("rx_present", True)
+```
+
+Where they show up:
+- HTML report: expand a test row to see a Properties table listing all recorded key/value pairs
+- Captured output: look for lines like `[prop] key=value` emitted by the `rp` helper
+
+Suggested standardized keys across suites live in `docs/15_report_properties_cheatsheet.md`.

docs/12_using_the_framework.md

@@ -142,6 +142,8 @@ Expected Result:
 """
 ```
 
+Tip: For runtime properties in reports, prefer the shared `rp` fixture (wrapper around `record_property`) and use standardized keys from `docs/15_report_properties_cheatsheet.md`.
+
 ## Continuous Integration (CI)
 
 - Run `pytest` with your preferred markers in your pipeline.
@@ -170,3 +172,17 @@ Running tests headless via systemd typically involves:
 - No BabyLIN devices found: check USB connection, drivers, and permissions.
 - Timeouts on receive: increase `timeout` or verify schedule activity and SDF correctness.
 - Missing reports: ensure `pytest.ini` includes the HTML/JUnit plugins and the custom plugin is loaded.
+
+## Power supply (Owon) hardware test
+
+Enable `power_supply` in your config and set the serial port, then run the dedicated test or the tryout script.
+
+```powershell
+copy .\config\owon_psu.example.yaml .\config\owon_psu.yaml
+# edit COM port in .\config\owon_psu.yaml or set values in config\test_config.yaml
+
+pytest -k test_owon_psu_idn_and_optional_set -m hardware -q
+python .\vendor\Owon\tryout.py
+```
+
+See also: `docs/14_power_supply.md` for details and troubleshooting.

docs/14_power_supply.md

@@ -0,0 +1,103 @@
+# Power Supply (Owon) — control, configuration, tests, and tryout
+
+This guide covers using the Owon bench power supply via SCPI over serial with the framework.
+
+- Library: `ecu_framework/power/owon_psu.py`
+- Hardware test: `tests/hardware/test_owon_psu.py`
+- Tryout script: `vendor/Owon/tryout.py`
+- Configuration: `config/test_config.yaml` (`power_supply`), optionally merged from `config/owon_psu.yaml` or env `OWON_PSU_CONFIG`
+
+## Install dependencies
+
+```powershell
+pip install -r .\requirements.txt
+```
+
+## Configure
+
+You can keep PSU settings centrally or in a machine-specific YAML.
+
+- Central: `config/test_config.yaml` → `power_supply` section
+- Separate: `config/owon_psu.yaml` (or `OWON_PSU_CONFIG` env var)
+
+Supported keys:
+
+```yaml
+power_supply:
+  enabled: true
+  port: COM4           # e.g., COM4 (Windows) or /dev/ttyUSB0 (Linux)
+  baudrate: 115200
+  timeout: 1.0
+  eol: "\n"          # or "\r\n" if required
+  parity: N            # N|E|O
+  stopbits: 1          # 1|2
+  xonxoff: false
+  rtscts: false
+  dsrdtr: false
+  idn_substr: OWON
+  do_set: false
+  set_voltage: 5.0
+  set_current: 0.1
+```
+
+The central config loader automatically merges `config/owon_psu.yaml` (or the path in `OWON_PSU_CONFIG`) into `power_supply`.
+
+## Run the hardware test
+
+Skips unless `power_supply.enabled` is true and `port` is set.
+
+```powershell
+pytest -k test_owon_psu_idn_and_optional_set -m hardware -q
+```
+
+What it does:
+- Opens serial with your configured line params
+- Queries `*IDN?` (checks `idn_substr` if provided)
+- If `do_set` is true, sets voltage/current, enables output briefly, then disables
+
+## Use the library programmatically
+
+```python
+from ecu_framework.power import OwonPSU, SerialParams
+
+params = SerialParams(baudrate=115200, timeout=1.0)
+with OwonPSU("COM4", params, eol="\n") as psu:
+    print(psu.idn())
+    psu.set_voltage(1, 5.0)
+    psu.set_current(1, 0.1)
+    psu.set_output(True)
+    # ... measure, etc.
+    psu.set_output(False)
+```
+
+Notes:
+- Commands use newline-terminated writes; reads use `readline()`
+- SCPI forms: `SOUR:VOLT`, `SOUR:CURR`, `MEAS:VOLT?`, `MEAS:CURR?`, `output 0/1`, `output?`
+
+## Tryout script
+
+The tryout reads `OWON_PSU_CONFIG` or `config/owon_psu.yaml` and performs a small sequence.
+
+```powershell
+python .\vendor\Owon\tryout.py
+```
+
+It also scans ports with `*IDN?` using `scan_ports()`.
+
+## Troubleshooting
+
+- Empty `*IDN?` or timeouts:
+  - Verify COM port and exclusivity (no other program holding it)
+  - Try `eol: "\r\n"`
+  - Adjust `parity` and `stopbits` per your device manual
+- Windows COM > 9:
+  - Most Python code accepts `COM10` directly; if needed in other tools, use `\\.\\COM10`
+- Flow control:
+  - Keep `xonxoff`, `rtscts`, `dsrdtr` false unless required
+
+## Related files
+
+- `ecu_framework/power/owon_psu.py` — PSU controller (pyserial)
+- `tests/hardware/test_owon_psu.py` — Hardware test using central config
+- `vendor/Owon/tryout.py` — Quick demo runner
+- `config/owon_psu.example.yaml` — Example machine-specific YAML

docs/15_report_properties_cheatsheet.md

@@ -0,0 +1,53 @@
+# Report properties cheatsheet (record_property / rp)
+
+Use these standardized keys when calling `record_property("key", value)` or the `rp("key", value)` helper.
+This keeps reports consistent and easy to scan across suites.
+
+## General
+- test_phase: setup | call | teardown (if you want to distinguish)
+- environment: local | ci | lab
+- config_source: defaults | file | env | env+overrides (already used in unit tests)
+
+## LIN (common)
+- lin_type: mock | babylin
+- tx_id: hex string or int (e.g., "0x12")
+- tx_data: list of ints (bytes)
+- rx_present: bool
+- rx_id: hex string or int
+- rx_data: list of ints
+- timeout_s: float seconds
+
+## BabyLIN specifics
+- sdf_path: string
+- schedule_nr: int
+- receive_result: frame | timeout
+- wrapper: mock_bl | _MockBytesOnly | real (for future)
+
+## Mock-specific
+- expected_data: list of ints
+
+## Power supply (PSU)
+- psu_idn: string from `*IDN?`
+- output_status_before: bool
+- output_status_after: bool
+- set_voltage: float (V)
+- set_current: float (A)
+- measured_voltage: float (V)
+- measured_current: float (A)
+- psu_port: e.g., COM4 or /dev/ttyUSB0 (if helpful)
+
+## Flashing
+- hex_path: string
+- sent_count: int (frames sent by stub/mock)
+- flash_result: ok | fail (for future real flashing)
+
+## Configuration highlights
+- interface_type: mock | babylin
+- interface_channel: int
+- flash_enabled: bool
+
+## Tips
+- Prefer simple, lowercase snake_case keys
+- Use lists for byte arrays so they render clearly in JSON and HTML
+- Log both expected and actual when asserting patterns (e.g., deterministic responses)
+- Keep units in the key name when helpful (voltage/current include V/A in the name)

docs/README.md

@@ -16,8 +16,11 @@ A guided tour of the ECU testing framework. Start here:
 11. `10_build_custom_image.md` — Build a custom Raspberry Pi OS image with the framework baked in
 12. `12_using_the_framework.md` — Practical usage: local, hardware, CI, and Pi
 13. `13_unit_testing_guide.md` — Unit tests layout, markers, coverage, and tips
+14. `14_power_supply.md` — Owon PSU control, configuration, tests, and tryout script
+15. `15_report_properties_cheatsheet.md` — Standardized keys for record_property/rp across suites
 
 Related references:
 - Root project guide: `../README.md`
 - Full framework guide: `../TESTING_FRAMEWORK_GUIDE.md`
 - BabyLIN placement and integration: `../vendor/README.md`
+ - PSU tryout and scripts: `../vendor/Owon/`

ecu_framework/config.py

@@ -55,6 +55,39 @@ class EcuTestConfig:
 
     interface: InterfaceConfig = field(default_factory=InterfaceConfig)
     flash: FlashConfig = field(default_factory=FlashConfig)
+    # Serial power supply (e.g., Owon) configuration
+    # Test code can rely on these values to interact with PSU if enabled
+    power_supply: "PowerSupplyConfig" = field(default_factory=lambda: PowerSupplyConfig())
+
+
+@dataclass
+class PowerSupplyConfig:
+    """Serial power supply configuration (e.g., Owon PSU).
+
+    enabled: Whether PSU tests/features should be active.
+    port: Serial device (e.g., COM4 on Windows, /dev/ttyUSB0 on Linux).
+    baudrate/timeout/eol: Basic line settings; eol often "\n" or "\r\n".
+    parity: One of "N", "E", "O".
+    stopbits: 1 or 2.
+    xonxoff/rtscts/dsrdtr: Flow control flags.
+    idn_substr: Optional substring to assert in *IDN? responses.
+    do_set/set_voltage/set_current: Optional demo/test actions.
+    """
+
+    enabled: bool = False
+    port: Optional[str] = None
+    baudrate: int = 115200
+    timeout: float = 1.0
+    eol: str = "\n"
+    parity: str = "N"
+    stopbits: float = 1.0
+    xonxoff: bool = False
+    rtscts: bool = False
+    dsrdtr: bool = False
+    idn_substr: Optional[str] = None
+    do_set: bool = False
+    set_voltage: float = 1.0
+    set_current: float = 0.1
 
 
 DEFAULT_CONFIG_RELATIVE = pathlib.Path("config") / "test_config.yaml"  # Default config path relative to repo root
@@ -83,6 +116,7 @@ def _to_dataclass(cfg: Dict[str, Any]) -> EcuTestConfig:
     """
     iface = cfg.get("interface", {})  # Sub-config for interface
     flash = cfg.get("flash", {})  # Sub-config for flashing
+    psu = cfg.get("power_supply", {})  # Sub-config for power supply
     return EcuTestConfig(
         interface=InterfaceConfig(
             type=str(iface.get("type", "mock")).lower(),  # Normalize to lowercase
@@ -98,6 +132,22 @@ def _to_dataclass(cfg: Dict[str, Any]) -> EcuTestConfig:
             enabled=bool(flash.get("enabled", False)),  # Coerce to bool
             hex_path=flash.get("hex_path"),  # Optional hex path
         ),
+        power_supply=PowerSupplyConfig(
+            enabled=bool(psu.get("enabled", False)),
+            port=psu.get("port"),
+            baudrate=int(psu.get("baudrate", 115200)),
+            timeout=float(psu.get("timeout", 1.0)),
+            eol=str(psu.get("eol", "\n")),
+            parity=str(psu.get("parity", "N")),
+            stopbits=float(psu.get("stopbits", 1.0)),
+            xonxoff=bool(psu.get("xonxoff", False)),
+            rtscts=bool(psu.get("rtscts", False)),
+            dsrdtr=bool(psu.get("dsrdtr", False)),
+            idn_substr=psu.get("idn_substr"),
+            do_set=bool(psu.get("do_set", False)),
+            set_voltage=float(psu.get("set_voltage", 1.0)),
+            set_current=float(psu.get("set_current", 0.1)),
+        ),
     )
 
 
@@ -121,6 +171,22 @@ def load_config(workspace_root: Optional[str] = None, overrides: Optional[Dict[s
             "enabled": False,
             "hex_path": None,
         },
+        "power_supply": {
+            "enabled": False,
+            "port": None,
+            "baudrate": 115200,
+            "timeout": 1.0,
+            "eol": "\n",
+            "parity": "N",
+            "stopbits": 1.0,
+            "xonxoff": False,
+            "rtscts": False,
+            "dsrdtr": False,
+            "idn_substr": None,
+            "do_set": False,
+            "set_voltage": 1.0,
+            "set_current": 0.1,
+        },
     }
 
     cfg_path: Optional[pathlib.Path] = None  # Resolved configuration file path
@@ -145,6 +211,23 @@ def load_config(workspace_root: Optional[str] = None, overrides: Optional[Dict[s
             if isinstance(file_cfg, dict):  # Only merge dicts
                 _deep_update(base, file_cfg)
 
+    # Optionally merge a dedicated PSU YAML if present (or env var path)
+    # This allows users to keep sensitive or machine-specific serial settings separate
+    psu_env = os.getenv("OWON_PSU_CONFIG")
+    psu_default = None
+    if workspace_root:
+        candidate = pathlib.Path(workspace_root) / "config" / "owon_psu.yaml"
+        if candidate.is_file():
+            psu_default = candidate
+    psu_path: Optional[pathlib.Path] = pathlib.Path(psu_env) if psu_env else psu_default
+    if psu_path and psu_path.is_file():
+        with open(psu_path, "r", encoding="utf-8") as f:
+            psu_cfg = yaml.safe_load(f) or {}
+            if isinstance(psu_cfg, dict):
+                base.setdefault("power_supply", {})
+                # Merge PSU YAML into power_supply section
+                base["power_supply"] = _deep_update(base["power_supply"], psu_cfg)
+
     # 1) In-memory overrides always win
     if overrides:
         _deep_update(base, overrides)

ecu_framework/power/__init__.py

@@ -0,0 +1,13 @@
+"""Power control helpers for ECU tests.
+
+Currently includes Owon PSU serial SCPI controller.
+"""
+
+from .owon_psu import SerialParams, OwonPSU, scan_ports, auto_detect
+
+__all__ = [
+    "SerialParams",
+    "OwonPSU",
+    "scan_ports",
+    "auto_detect",
+]

ecu_framework/power/owon_psu.py

@@ -0,0 +1,193 @@
+"""Owon PSU SCPI control over raw serial (pyserial).
+
+This module provides a small, programmatic API suitable for tests:
+
+- OwonPSU: context-manageable controller class
+- scan_ports(): find devices responding to *IDN?
+- auto_detect(): select the first matching device by IDN substring
+
+Behavior follows the working tryout example (serial):
+- Both commands and queries are terminated with a newline ("\n" by default).
+- Queries use readline() to fetch a single-line response.
+- Command set uses: 'output 0/1', 'output?', 'SOUR:VOLT <V>', 'SOUR:CURR <A>', 'MEAS:VOLT?', 'MEAS:CURR?', '*IDN?'
+"""
+from __future__ import annotations
+
+from dataclasses import dataclass
+from time import sleep
+from typing import Iterable, Optional
+
+import serial
+from serial import Serial
+from serial.tools import list_ports
+
+
+@dataclass
+class SerialParams:
+    baudrate: int = 115200
+    timeout: float = 1.0  # seconds
+    bytesize: int = serial.EIGHTBITS
+    parity: str = serial.PARITY_NONE
+    stopbits: float = serial.STOPBITS_ONE
+    xonxoff: bool = False
+    rtscts: bool = False
+    dsrdtr: bool = False
+    write_timeout: float = 1.0  # seconds
+
+
+class OwonPSU:
+    def __init__(self, port: str, params: SerialParams | None = None, eol: str = "\n") -> None:
+        self.port = port
+        self.params = params or SerialParams()
+        self.eol = eol
+        self._ser: Optional[Serial] = None
+
+    def open(self) -> None:
+        if self._ser and self._ser.is_open:
+            return
+        ser = Serial()
+        ser.port = self.port
+        ser.baudrate = self.params.baudrate
+        ser.bytesize = self.params.bytesize
+        ser.parity = self.params.parity
+        ser.stopbits = self.params.stopbits
+        ser.xonxoff = self.params.xonxoff
+        ser.rtscts = self.params.rtscts
+        ser.dsrdtr = self.params.dsrdtr
+        ser.timeout = self.params.timeout
+        ser.write_timeout = self.params.write_timeout
+        ser.open()
+        self._ser = ser
+
+    def close(self) -> None:
+        if self._ser and self._ser.is_open:
+            try:
+                self._ser.close()
+            finally:
+                self._ser = None
+
+    def __enter__(self) -> "OwonPSU":
+        self.open()
+        return self
+
+    def __exit__(self, exc_type, exc, tb) -> None:
+        self.close()
+
+    @property
+    def is_open(self) -> bool:
+        return bool(self._ser and self._ser.is_open)
+
+    # ---- low-level ops ----
+    def write(self, cmd: str) -> None:
+        """Write a SCPI command (append eol)."""
+        if not self._ser:
+            raise RuntimeError("Port is not open")
+        data = (cmd + self.eol).encode("ascii", errors="ignore")
+        self._ser.write(data)
+        self._ser.flush()
+
+    def query(self, q: str) -> str:
+        """Send a query with terminator and return a single-line response using readline()."""
+        if not self._ser:
+            raise RuntimeError("Port is not open")
+        # clear buffers to avoid stale data
+        try:
+            self._ser.reset_input_buffer()
+            self._ser.reset_output_buffer()
+        except Exception:
+            pass
+        self._ser.write((q + self.eol).encode("ascii", errors="ignore"))
+        self._ser.flush()
+        line = self._ser.readline().strip()
+        return line.decode("ascii", errors="ignore")
+
+    # ---- high-level ops ----
+    def idn(self) -> str:
+        return self.query("*IDN?")
+
+    def set_voltage(self, channel: int, volts: float) -> None:
+        # Using SOUR:VOLT <V> per working example
+        self.write(f"SOUR:VOLT {volts:.3f}")
+
+    def set_current(self, channel: int, amps: float) -> None:
+        # Using SOUR:CURR <A> per working example
+        self.write(f"SOUR:CURR {amps:.3f}")
+
+    def set_output(self, on: bool) -> None:
+        # Using 'output 1/0' per working example
+        self.write("output 1" if on else "output 0")
+
+    def output_status(self) -> str:
+        return self.query("output?")
+
+    def measure_voltage(self) -> str:
+        return self.query("MEAS:VOLT?")
+
+    def measure_current(self) -> str:
+        return self.query("MEAS:CURR?")
+
+
+# ------- discovery helpers -------
+
+def try_idn_on_port(port: str, params: SerialParams) -> str:
+    dev: Optional[Serial] = None
+    try:
+        dev = Serial()
+        dev.port = port
+        dev.baudrate = params.baudrate
+        dev.bytesize = params.bytesize
+        dev.parity = params.parity
+        dev.stopbits = params.stopbits
+        dev.xonxoff = params.xonxoff
+        dev.rtscts = params.rtscts
+        dev.dsrdtr = params.dsrdtr
+        dev.timeout = params.timeout
+        dev.write_timeout = params.write_timeout
+        dev.open()
+        # Query with newline terminator and read a single line
+        dev.reset_input_buffer(); dev.reset_output_buffer()
+        dev.write(b"*IDN?\n"); dev.flush()
+        line = dev.readline().strip()
+        return line.decode("ascii", errors="ignore")
+    except Exception:
+        return ""
+    finally:
+        if dev and dev.is_open:
+            try:
+                dev.close()
+            except Exception:
+                pass
+
+
+def scan_ports(params: SerialParams | None = None) -> list[tuple[str, str]]:
+    """Return [(port, idn_response), ...] for ports that responded."""
+    params = params or SerialParams()
+    results: list[tuple[str, str]] = []
+    for p in list_ports.comports():
+        dev = p.device
+        resp = try_idn_on_port(dev, params)
+        if resp:
+            results.append((dev, resp))
+    return results
+
+
+def auto_detect(params: SerialParams | None = None, idn_substr: str | None = None) -> Optional[str]:
+    """Return the first port whose *IDN? contains idn_substr (case-insensitive), else first responder."""
+    params = params or SerialParams()
+    matches = scan_ports(params)
+    if not matches:
+        return None
+    if idn_substr:
+        isub = idn_substr.lower()
+        for port, idn in matches:
+            if isub in idn.lower():
+                return port
+    return matches[0][0]
+
+
+__all__ = [
+    "SerialParams",
+    "OwonPSU",
+    "scan_ports",
+    "auto_detect",
+]

pytest.ini

@@ -5,11 +5,13 @@
 # --html=...             → Generate a human-friendly HTML report after each run.
 # --self-contained-html  → Inline CSS/JS in the HTML report for easy sharing.
 # --tb=short             → Short tracebacks to keep logs readable.
-# -p conftest_plugin     → Load our custom plugin (conftest_plugin.py) that:
+# Plugin note: We no longer force-load via `-p conftest_plugin` to avoid ImportError
+# on environments where the file might be missing. Instead, `conftest.py` will
+# register the plugin if present. The plugin:
 #                          - extracts Title/Description/Requirements/Steps from test docstrings
 #                          - adds custom columns to the HTML report
 #                          - writes requirements_coverage.json and summary.md in reports/
-addopts = -ra --junitxml=reports/junit.xml --html=reports/report.html --self-contained-html --tb=short -p conftest_plugin --cov=ecu_framework --cov-report=term-missing
+addopts = -ra --junitxml=reports/junit.xml --html=reports/report.html --self-contained-html --tb=short --cov=ecu_framework --cov-report=term-missing
 
 # markers: Document all custom markers so pytest doesn't warn and so usage is clear.
 # Use with: pytest -m "markername"

requirements.txt

@@ -1,6 +1,7 @@
 # Core testing and utilities
 pytest>=8,<9                 # Test runner and framework (parametrize, fixtures, markers)
 pyyaml>=6,<7                 # Parse YAML config files under ./config/
+pyserial>=3,<4               # Serial communication for Owon PSU and hardware tests
 
 # BabyLIN SDK wrapper requires 'six' on some platforms
 six>=1.16,<2

tests/conftest.py

@@ -62,3 +62,22 @@ def flash_ecu(config: EcuTestConfig, lin: LinInterface) -> None:
     ok = flasher.flash_hex(config.flash.hex_path)
     if not ok:
         pytest.fail("ECU flashing failed")
+
+
+@pytest.fixture
+def rp(record_property: "pytest.RecordProperty"):
+    """Convenience reporter: attaches a key/value as a test property and echoes to captured output.
+
+    Usage in tests:
+        def test_something(rp):
+            rp("key", value)
+    """
+    def _rp(key: str, value):
+        # Attach property (pytest-html will show in Properties table)
+        record_property(str(key), value)
+        # Echo to captured output for quick scanning in report details
+        try:
+            print(f"[prop] {key}={value}")
+        except Exception:
+            pass
+    return _rp

tests/hardware/test_owon_psu.py

@@ -0,0 +1,102 @@
+import time
+
+import pytest
+import serial
+
+from ecu_framework.power import OwonPSU, SerialParams
+from ecu_framework.config import EcuTestConfig
+
+
+pytestmark = [pytest.mark.hardware]
+
+
+def test_owon_psu_idn_and_optional_set(config: EcuTestConfig, rp):
+    """
+    Title: Owon PSU - IDN, Output Status, Set/Measure Verification
+
+    Description:
+        Validates serial SCPI control of an Owon PSU: IDN retrieval, output status query,
+        and optional set/measure cycle using values from central configuration.
+
+    Test Steps:
+    1. Load PSU config from EcuTestConfig.power_supply
+    2. Open serial connection and query *IDN?
+    3. Query output status (output?) and record initial state
+    4. If configured, set voltage/current, enable output briefly, measure V/I, then disable output
+    5. Record IDN, output status before/after, set values, and measured values in the report
+
+    Expected Result:
+        *IDN? returns a non-empty string (containing idn_substr if configured), serial operations succeed,
+        and, when enabled, the output toggles on then off with measurements returned.
+    """
+    psu_cfg = config.power_supply
+    if not psu_cfg.enabled:
+        pytest.skip("Power supply tests disabled in config.power_supply.enabled")
+    if not psu_cfg.port:
+        pytest.skip("No power supply 'port' configured (config.power_supply.port)")
+
+    # Serial params (with sensible defaults via central config)
+    baud = int(psu_cfg.baudrate)
+    timeout = float(psu_cfg.timeout)
+    parity = psu_cfg.parity or "N"
+    stopbits = psu_cfg.stopbits or 1
+    xonxoff = bool(psu_cfg.xonxoff)
+    rtscts = bool(psu_cfg.rtscts)
+    dsrdtr = bool(psu_cfg.dsrdtr)
+    eol = psu_cfg.eol or "\n"
+
+    ps = SerialParams(
+        baudrate=baud,
+        timeout=timeout,
+        parity={"N": serial.PARITY_NONE, "E": serial.PARITY_EVEN, "O": serial.PARITY_ODD}.get(str(parity).upper(), serial.PARITY_NONE),
+        stopbits={1: serial.STOPBITS_ONE, 2: serial.STOPBITS_TWO}.get(int(float(stopbits)), serial.STOPBITS_ONE),
+        xonxoff=xonxoff,
+        rtscts=rtscts,
+        dsrdtr=dsrdtr,
+    )
+
+    want_substr = psu_cfg.idn_substr
+    do_set = bool(psu_cfg.do_set)
+    set_v = float(psu_cfg.set_voltage)
+    set_i = float(psu_cfg.set_current)
+
+    port = str(psu_cfg.port).strip()
+
+    with OwonPSU(port, ps, eol=eol) as psu:
+        # Step 2: IDN
+        idn = psu.idn()
+        rp("psu_idn", idn)
+        print(f"PSU IDN: {idn}")
+        assert isinstance(idn, str)
+        assert idn != "", "*IDN? returned empty response"
+        if want_substr:
+            assert str(want_substr).lower() in idn.lower(), f"IDN does not contain expected substring: {want_substr}. Got: {idn}"
+
+        # Step 3: Output status before
+        out_before = psu.output_status()
+        rp("output_status_before", str(out_before))
+        print(f"Output status (before): {out_before}")
+
+        if do_set:
+            # Step 4: Set and measure
+            rp("set_voltage", set_v)
+            rp("set_current", set_i)
+            print(f"Setting: voltage={set_v}V, current={set_i}A")
+
+            psu.set_voltage(1, set_v)
+            psu.set_current(1, set_i)
+            psu.set_output(True)
+            time.sleep(1.0)  # allow settling
+
+            try:
+                mv = psu.measure_voltage()
+                mi = psu.measure_current()
+                rp("measured_voltage", mv)
+                rp("measured_current", mi)
+                print(f"Measured: voltage={mv}V, current={mi}A")
+            finally:
+                psu.set_output(False)
+
+            out_after = psu.output_status()
+            rp("output_status_after", str(out_after))
+            print(f"Output status (after): {out_after}")

tests/test_babylin_hardware_schedule_smoke.py

@@ -8,7 +8,7 @@ pytestmark = [pytest.mark.hardware, pytest.mark.babylin, pytest.mark.smoke]
 WORKSPACE_ROOT = pathlib.Path(__file__).resolve().parents[1]
 
 
-def test_babylin_sdk_example_flow(config, lin):
+def test_babylin_sdk_example_flow(config, lin, rp):
     """
     Title: BabyLIN SDK Example Flow - Open, Load SDF, Start Schedule, Rx Timeout
 
@@ -37,9 +37,12 @@ def test_babylin_sdk_example_flow(config, lin):
     # Step 1: Ensure config is set for hardware with SDK wrapper
     assert config.interface.type == "babylin"
     assert config.interface.sdf_path is not None
+    rp("sdf_path", str(config.interface.sdf_path))
+    rp("schedule_nr", int(config.interface.schedule_nr))
 
     # Step 3: Attempt a short receive to validate RX path while schedule runs
     rx = lin.receive(timeout=0.2)
+    rp("receive_result", "timeout" if rx is None else "frame")
 
     # Step 4: Accept timeout or a valid frame object depending on bus activity
     assert rx is None or hasattr(rx, "id")

tests/test_babylin_hardware_smoke.py

@@ -4,7 +4,7 @@ import pytest
 pytestmark = [pytest.mark.hardware, pytest.mark.babylin]
 
 
-def test_babylin_connect_receive_timeout(lin):
+def test_babylin_connect_receive_timeout(lin, rp):
     """
     Title: BabyLIN Hardware Smoke - Connect and Timed Receive
 
@@ -28,6 +28,7 @@ def test_babylin_connect_receive_timeout(lin):
     """
     # Step 2: Perform a short receive to verify operability
     rx = lin.receive(timeout=0.2)
+    rp("receive_result", "timeout" if rx is None else "frame")
 
     # Step 3: Accept either a timeout (None) or a frame-like object
     assert rx is None or hasattr(rx, "id")

tests/test_babylin_wrapper_mock.py

@@ -39,7 +39,7 @@ class _MockBytesOnly:
 @pytest.mark.babylin
 @pytest.mark.smoke
 @pytest.mark.req_001
-def test_babylin_sdk_adapter_with_mock_wrapper():
+def test_babylin_sdk_adapter_with_mock_wrapper(rp):
     """
     Title: SDK Adapter - Send/Receive with Mock Wrapper
 
@@ -62,6 +62,7 @@ def test_babylin_sdk_adapter_with_mock_wrapper():
     """
     # Step 1-2: Create adapter with wrapper injection and connect
     lin = BabyLinInterface(sdf_path="./vendor/Example.sdf", schedule_nr=0, wrapper_module=mock_bl)
+    rp("wrapper", "mock_bl")
     lin.connect()
     try:
         # Step 3: Transmit a known payload on a chosen ID
@@ -70,6 +71,9 @@ def test_babylin_sdk_adapter_with_mock_wrapper():
 
         # Step 4: Receive from the mock's RX queue (loopback)
         rx = lin.receive(timeout=0.1)
+        rp("tx_id", f"0x{tx.id:02X}")
+        rp("tx_data", list(tx.data))
+        rp("rx_present", rx is not None)
 
         # Step 5: Validate ID and payload integrity
         assert rx is not None, "Expected a frame from mock loopback"
@@ -87,7 +91,7 @@ def test_babylin_sdk_adapter_with_mock_wrapper():
     (mock_bl, True),          # length signature available: expect deterministic pattern
     (_MockBytesOnly, False),  # bytes-only signature: expect zeros of requested length
 ])
-def test_babylin_master_request_with_mock_wrapper(wrapper, expect_pattern):
+def test_babylin_master_request_with_mock_wrapper(wrapper, expect_pattern, rp):
     """
     Title: SDK Adapter - Master Request using Mock Wrapper
 
@@ -112,11 +116,14 @@ def test_babylin_master_request_with_mock_wrapper(wrapper, expect_pattern):
     """
     # Step 1-2: Initialize mock-backed adapter
     lin = BabyLinInterface(wrapper_module=wrapper)
+    rp("wrapper", getattr(wrapper, "__name__", str(wrapper)))
     lin.connect()
     try:
         # Step 3: Request 4 bytes for ID 0x22
         req_id = 0x22
         length = 4
+        rp("req_id", f"0x{req_id:02X}")
+        rp("req_len", length)
         rx = lin.request(id=req_id, length=length, timeout=0.1)
 
         # Step 4-5: Validate response
@@ -124,9 +131,15 @@ def test_babylin_master_request_with_mock_wrapper(wrapper, expect_pattern):
         assert rx.id == req_id
         if expect_pattern:
             # length-signature mock returns deterministic pattern
-            assert rx.data == bytes(((req_id + i) & 0xFF) for i in range(length))
+            expected = bytes(((req_id + i) & 0xFF) for i in range(length))
+            rp("expected_data", list(expected))
+            rp("rx_data", list(rx.data))
+            assert rx.data == expected
         else:
             # bytes-only mock returns exactly the bytes we sent (zeros of requested length)
-            assert rx.data == bytes([0] * length)
+            expected = bytes([0] * length)
+            rp("expected_data", list(expected))
+            rp("rx_data", list(rx.data))
+            assert rx.data == expected
     finally:
         lin.disconnect()

tests/test_smoke_mock.py

@@ -20,7 +20,7 @@ class TestMockLinInterface:
     @pytest.mark.smoke
     @pytest.mark.req_001
     @pytest.mark.req_003
-    def test_mock_send_receive_echo(self, lin):
+    def test_mock_send_receive_echo(self, lin, rp):
         """
         Title: Mock LIN Interface - Send/Receive Echo Test
         
@@ -43,12 +43,19 @@ class TestMockLinInterface:
         """
         # Step 1: Create test frame with known ID and payload
         test_frame = LinFrame(id=0x12, data=bytes([1, 2, 3]))
+        rp("lin_type", "mock")
+        rp("tx_id", f"0x{test_frame.id:02X}")
+        rp("tx_data", list(test_frame.data))
         
         # Step 2: Transmit frame via mock interface (mock will enqueue to RX)
         lin.send(test_frame)
         
         # Step 3: Receive echoed frame with ID filtering and timeout
         received_frame = lin.receive(id=0x12, timeout=0.5)
+        rp("rx_present", received_frame is not None)
+        if received_frame is not None:
+            rp("rx_id", f"0x{received_frame.id:02X}")
+            rp("rx_data", list(received_frame.data))
         
         # Step 4: Validate echo functionality and payload integrity
         assert received_frame is not None, "Mock interface should echo transmitted frames"
@@ -57,7 +64,7 @@ class TestMockLinInterface:
 
     @pytest.mark.smoke
     @pytest.mark.req_002
-    def test_mock_request_synthesized_response(self, lin):
+    def test_mock_request_synthesized_response(self, lin, rp):
         """
         Title: Mock LIN Interface - Master Request Response Test
         
@@ -85,6 +92,9 @@ class TestMockLinInterface:
         requested_length = 4
         
         # Step 2: Execute request operation; mock synthesizes deterministic bytes
+        rp("lin_type", "mock")
+        rp("req_id", f"0x{request_id:02X}")
+        rp("req_len", requested_length)
         response_frame = lin.request(id=request_id, length=requested_length, timeout=0.5)
         
         # Step 3: Validate response generation
@@ -96,11 +106,13 @@ class TestMockLinInterface:
         
         # Step 5: Validate deterministic response pattern
         expected_data = bytes((request_id + i) & 0xFF for i in range(requested_length))
+        rp("rx_data", list(response_frame.data) if response_frame else None)
+        rp("expected_data", list(expected_data))
         assert response_frame.data == expected_data, f"Response data {response_frame.data!r} should follow deterministic pattern {expected_data!r}"
 
     @pytest.mark.smoke
     @pytest.mark.req_004
-    def test_mock_receive_timeout_behavior(self, lin):
+    def test_mock_receive_timeout_behavior(self, lin, rp):
         """
         Title: Mock LIN Interface - Receive Timeout Test
         
@@ -125,7 +137,11 @@ class TestMockLinInterface:
         short_timeout = 0.1  # 100ms timeout
         
         # Step 2: Execute receive with timeout (should return None quickly)
+        rp("lin_type", "mock")
+        rp("rx_id", f"0x{non_existent_id:02X}")
+        rp("timeout_s", short_timeout)
         result = lin.receive(id=non_existent_id, timeout=short_timeout)
+        rp("rx_present", result is not None)
         
         # Step 3: Verify proper timeout behavior (no exceptions, returns None)
         assert result is None, "Receive operation should return None when no matching frames available"
@@ -139,7 +155,7 @@ class TestMockLinInterface:
         (0x20, bytes([0x01, 0x02, 0x03, 0x04, 0x05])),
         (0x15, bytes([0xFF, 0x00, 0xCC, 0x33, 0xF0, 0x0F, 0xA5, 0x5A])),
     ])
-    def test_mock_frame_validation_boundaries(self, lin, frame_id, data_payload):
+    def test_mock_frame_validation_boundaries(self, lin, rp, frame_id, data_payload):
         """
         Title: Mock LIN Interface - Frame Validation Boundaries Test
         
@@ -160,6 +176,9 @@ class TestMockLinInterface:
         """
         # Step 1: Create frame with parameterized values
         test_frame = LinFrame(id=frame_id, data=data_payload)
+        rp("lin_type", "mock")
+        rp("tx_id", f"0x{frame_id:02X}")
+        rp("tx_len", len(data_payload))
         
         # Step 2: Send and receive frame
         lin.send(test_frame)

tests/unit/test_config_loader.py

@@ -7,7 +7,7 @@ from ecu_framework.config import load_config
 
 
 @pytest.mark.unit
-def test_config_precedence_env_overrides(monkeypatch, tmp_path):
+def test_config_precedence_env_overrides(monkeypatch, tmp_path, rp):
     # Create a YAML file to use via env var
     yaml_path = tmp_path / "cfg.yaml"
     yaml_path.write_text("interface:\n  type: babylin\n  channel: 7\n")
@@ -17,6 +17,9 @@ def test_config_precedence_env_overrides(monkeypatch, tmp_path):
 
     # Apply overrides on top
     cfg = load_config(workspace_root=str(tmp_path), overrides={"interface": {"channel": 9}})
+    rp("config_source", "env+overrides")
+    rp("interface_type", cfg.interface.type)
+    rp("interface_channel", cfg.interface.channel)
 
     # Env file applied
     assert cfg.interface.type == "babylin"
@@ -25,10 +28,13 @@ def test_config_precedence_env_overrides(monkeypatch, tmp_path):
 
 
 @pytest.mark.unit
-def test_config_defaults_when_no_file(monkeypatch):
+def test_config_defaults_when_no_file(monkeypatch, rp):
     # Ensure no env path
     monkeypatch.delenv("ECU_TESTS_CONFIG", raising=False)
 
     cfg = load_config(workspace_root=None)
+    rp("config_source", "defaults")
+    rp("interface_type", cfg.interface.type)
+    rp("flash_enabled", cfg.flash.enabled)
     assert cfg.interface.type == "mock"
     assert cfg.flash.enabled is False

tests/unit/test_hex_flasher.py

@@ -17,7 +17,7 @@ class _StubLin:
 
 
 @pytest.mark.unit
-def test_hex_flasher_sends_basic_sequence(tmp_path):
+def test_hex_flasher_sends_basic_sequence(tmp_path, rp):
     # Minimal valid Intel HEX file (EOF record)
     hex_path = tmp_path / "fw.hex"
     hex_path.write_text(":00000001FF\n")
@@ -25,6 +25,8 @@ def test_hex_flasher_sends_basic_sequence(tmp_path):
     lin = _StubLin()
     flasher = HexFlasher(lin)
     flasher.flash_hex(str(hex_path))
+    rp("hex_path", str(hex_path))
+    rp("sent_count", len(lin.sent))
 
     # Placeholder assertion; refine as the flasher gains functionality
     assert isinstance(lin.sent, list)

tests/unit/test_linframe.py

@@ -3,19 +3,23 @@ from ecu_framework.lin.base import LinFrame
 
 
 @pytest.mark.unit
-def test_linframe_accepts_valid_ranges():
+def test_linframe_accepts_valid_ranges(record_property: "pytest.RecordProperty"):  # type: ignore[name-defined]
     f = LinFrame(id=0x3F, data=bytes([0] * 8))
+    record_property("valid_id", f"0x{f.id:02X}")
+    record_property("data_len", len(f.data))
     assert f.id == 0x3F and len(f.data) == 8
 
 
 @pytest.mark.unit
 @pytest.mark.parametrize("bad_id", [-1, 0x40])
-def test_linframe_invalid_id_raises(bad_id):
+def test_linframe_invalid_id_raises(bad_id, record_property: "pytest.RecordProperty"):  # type: ignore[name-defined]
+    record_property("bad_id", bad_id)
     with pytest.raises(ValueError):
         LinFrame(id=bad_id, data=b"\x00")
 
 
 @pytest.mark.unit
-def test_linframe_too_long_raises():
+def test_linframe_too_long_raises(record_property: "pytest.RecordProperty"):  # type: ignore[name-defined]
+    record_property("data_len", 9)
     with pytest.raises(ValueError):
         LinFrame(id=0x01, data=bytes(range(9)))

vendor/Owon/tryout.py

@@ -0,0 +1,95 @@
+"""Owon PSU quick demo (optimized to use ecu_framework.power.owon_psu).
+
+This script reads configuration from OWON_PSU_CONFIG (YAML) or ./config/owon_psu.yaml,
+prints discovered ports responding to *IDN?, then connects to the configured port
+and performs a small sequence (IDN, optional V/I set, toggle output, measure V/I).
+
+No CLI flags; edit YAML to change behavior.
+"""
+
+from __future__ import annotations
+
+import os
+import time
+from pathlib import Path
+
+import yaml
+
+try:
+    from ecu_framework.power import OwonPSU, SerialParams, scan_ports
+except ModuleNotFoundError:
+    # Ensure repository root is on sys.path when running this file directly
+    import sys
+    repo_root = Path(__file__).resolve().parents[2]
+    if str(repo_root) not in sys.path:
+        sys.path.insert(0, str(repo_root))
+    from ecu_framework.power import OwonPSU, SerialParams, scan_ports
+
+
+def _load_yaml_config() -> dict:
+    cfg_path = str(Path("config") / "owon_psu.yaml")
+    p = Path(cfg_path).resolve()  
+    print("Using config path:", str(p))
+    if not p.is_file():
+        return {}
+    with p.open("r", encoding="utf-8") as f:
+        data = yaml.safe_load(f) or {}
+        return data if isinstance(data, dict) else {}
+
+
+def run_demo() -> int:
+    cfg = _load_yaml_config()
+    if not cfg or "port" not in cfg:
+        print("Config not found or missing 'port'. Set OWON_PSU_CONFIG or create ./config/owon_psu.yaml")
+        return 2
+
+    print("Scanning ports (responding to *IDN?):")
+    for dev, idn in scan_ports(SerialParams(baudrate=int(cfg.get("baudrate", 115200)), timeout=float(cfg.get("timeout", 1.0)))):
+        print(f"  {dev} -> {idn}")
+
+    # Serial params
+    baud = int(cfg.get("baudrate", 115200))
+    timeout = float(cfg.get("timeout", 1.0))
+    eol = cfg.get("eol", "\n")
+    from serial import PARITY_NONE, PARITY_EVEN, PARITY_ODD, STOPBITS_ONE, STOPBITS_TWO
+    parity = {"N": PARITY_NONE, "E": PARITY_EVEN, "O": PARITY_ODD}.get(str(cfg.get("parity", "N")).upper(), PARITY_NONE)
+    stopbits = {1: STOPBITS_ONE, 2: STOPBITS_TWO}.get(int(float(cfg.get("stopbits", 1))), STOPBITS_ONE)
+    xonxoff = bool(cfg.get("xonxoff", False))
+    rtscts = bool(cfg.get("rtscts", False))
+    dsrdtr = bool(cfg.get("dsrdtr", False))
+
+    ps = SerialParams(
+        baudrate=baud,
+        timeout=timeout,
+        parity=parity,
+        stopbits=stopbits,
+        xonxoff=xonxoff,
+        rtscts=rtscts,
+        dsrdtr=dsrdtr,
+    )
+
+    port = str(cfg["port"]).strip()
+
+    do_set = bool(cfg.get("do_set", False))
+    set_v = float(cfg.get("set_voltage", 1.0))
+    set_i = float(cfg.get("set_current", 0.1))
+
+    with OwonPSU(port, ps, eol=eol) as psu:
+        idn = psu.idn()
+        print(f"IDN: {idn}")
+        print(f"Output status: {psu.output_status()}")
+        if do_set:
+            psu.set_output(True)
+            time.sleep(0.5)
+            psu.set_voltage(1, set_v)
+            psu.set_current(1, set_i)
+            time.sleep(0.5)
+            print(f"Measured V: {psu.measure_voltage()} V")
+            print(f"Measured I: {psu.measure_current()} A")
+            time.sleep(0.5)
+            psu.set_output(False)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(run_demo())