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Docs for camera_feedback module (#23103)

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* Docs for camera_feedback module

* Update src/modules/camera_feedback/CameraFeedback.cpp

* Update src/modules/camera_feedback/CameraFeedback.cpp
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Hamish Willee 2024-05-23 08:44:34 +10:00 committed by GitHub
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src/modules/camera_feedback/CameraFeedback.cpp
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@ -194,6 +194,24 @@ CameraFeedback::print_usage(const char *reason)
R"DESCR_STR(
### Description
The camera_feedback module publishes `CameraCapture` UORB topics when image capture has been triggered.
If camera capture is enabled, then trigger information from the camera capture pin is published;
otherwise trigger information at the point the camera was commanded to trigger is published
(from the `camera_trigger` module).
The `CAMERA_IMAGE_CAPTURED` message is then emitted (by streaming code) following `CameraCapture` updates.
`CameraCapture` topics are also logged and can be used for geotagging.
### Implementation
`CameraTrigger` topics are published by the `camera_trigger` module (`feedback` field set `false`) when image capture is triggered,
and may also be published by the `camera_capture` driver (with `feedback` field set `true`) if the camera capture pin is activated.
The `camera_feedback` module subscribes to `CameraTrigger`.
It discards topics from the `camera_trigger` module if camera capture is enabled.
For the topics that are not discarded it creates a `CameraCapture` topic with the timestamp information
from the `CameraTrigger` and position information from the vehicle.
)DESCR_STR");