ism330dl: Auto-trigger conversion when reading after power down.

[nedseb]

Closes #123

Summary

When the ISM330DL is in power-down mode (power_down() called), reading acceleration, gyroscope, or temperature data now automatically restores the previous ODR configuration and waits for fresh data, instead of returning stale values.

• _is_power_down() — checks if both CTRL1_XL and CTRL2_G have ODR=0
• _ensure_data() — restores saved ODR/scale and waits 100ms for data ready
• _accel_odr / _gyro_odr — track the last non-zero ODR to enable restoration
• Called in acceleration_raw(), gyroscope_raw(), temperature_raw()

Follows the same convention as WSEN-PADS, WSEN-HIDS, and HTS221 (#44).

Test plan

Mock tests (no hardware)

python3 -m pytest tests/ -k "ism330dl and mock" -v

tests/test_scenarios.py::test_scenario[ism330dl/Verify WHO_AM_I register/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Read WHO_AM_I via method/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Status returns all ready flags/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Acceleration raw returns tuple of 3 ints/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Acceleration g returns expected values/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Acceleration ms2 matches g times 9.80665/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Gyroscope raw returns tuple of 3 ints/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Gyroscope dps returns zeros when static/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Gyroscope rads consistent with dps/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Temperature returns 25.0 from mock data/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Temperature raw returns int/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Temperature offset shifts reading/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Temperature with two-point calibration/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Calibration rejects equal measurements/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Orientation detects SCREEN_DOWN/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Motion returns STABLE when static/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Configure accel writes correct register value/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Configure gyro writes correct register value/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Configure accel rejects invalid scale/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Configure accel rejects invalid ODR/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Configure gyro rejects invalid scale/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Configure gyro rejects invalid ODR/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Power down writes zero to CTRL registers/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Reset sets BDU and IF_INC in CTRL3_C/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Acceleration readable after power down/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Gyroscope readable after power down/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Temperature readable after power down/mock] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Auto-trigger restores ODR after power down/mock] PASSED

28 passed

Hardware tests (STeaMi board connected)

python3 -m pytest tests/ --port /dev/ttyACM0 -k "ism330dl and hardware" -s -v

tests/test_scenarios.py::test_scenario[ism330dl/Verify WHO_AM_I register/hardware] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Read WHO_AM_I via method/hardware] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Status returns dictionary/hardware] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Acceleration magnitude near 1g/hardware] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Gyroscope values plausible at rest/hardware] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Temperature in plausible range/hardware] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Fresh acceleration after power down/hardware] PASSED
tests/test_scenarios.py::test_scenario[ism330dl/Fresh temperature after power down/hardware] PASSED

8 passed, 2 skipped (board_i2c_scan uses legacy 0x6B, manual test requires interactive mode)

[Copilot]

Pull request overview

This PR adds auto-trigger conversion support to the ISM330DL driver when the sensor is in power-down mode. After power_down() is called, reading acceleration, gyroscope, or temperature data now automatically restores the previous ODR configuration and waits for fresh data instead of returning stale values.

Changes:

• Added _is_power_down() and _ensure_data() methods plus _accel_odr/_gyro_odr tracking fields to auto-restore sensor configuration on read after power-down
• Hooked _ensure_data() into acceleration_raw(), gyroscope_raw(), and temperature_raw()
• Added 4 mock test scenarios verifying read-after-power-down behavior and ODR restoration

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
lib/ism330dl/ism330dl/device.py	Adds ODR tracking, _is_power_down(), _ensure_data(), and hooks them into raw read methods
tests/scenarios/ism330dl.yaml	Adds 4 mock test scenarios for auto-trigger behavior after power down

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[Copilot]

Pull request overview

This PR adds auto-trigger conversion support for the ISM330DL driver. When the sensor is in power-down mode, reading acceleration, gyroscope, or temperature data now automatically restores the previous ODR/scale configuration and waits for fresh data before returning values. This follows the established convention used in WSEN-PADS, WSEN-HIDS, and HTS221 drivers.

Changes:

• Added _is_power_down() and _ensure_data() methods plus _accel_odr/_gyro_odr state tracking to enable auto-trigger on read after power down.
• Hooked _ensure_data() into acceleration_raw(), gyroscope_raw(), and temperature_raw().
• Added 8 new YAML test scenarios covering auto-trigger behavior in both mock and hardware modes.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
lib/ism330dl/ism330dl/device.py	Added ODR tracking fields, _is_power_down(), _ensure_data(), and calls in raw reading methods.
tests/scenarios/ism330dl.yaml	Added mock and hardware test scenarios for read-after-power-down behavior.

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