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53 lines
1.7 KiB
Markdown
53 lines
1.7 KiB
Markdown
# Modules Reference: Camera (Driver)
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## camera_trigger
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Source: [drivers/camera_trigger](https://github.com/PX4/PX4-Autopilot/tree/main/src/drivers/camera_trigger)
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### Description
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Camera trigger driver.
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This module triggers cameras that are connected to the flight-controller outputs,
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or simple MAVLink cameras that implement the MAVLink trigger protocol.
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The driver responds to the following MAVLink trigger commands being found in missions or recieved over MAVLink:
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- `MAV_CMD_DO_TRIGGER_CONTROL`
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- `MAV_CMD_DO_DIGICAM_CONTROL`
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- `MAV_CMD_DO_SET_CAM_TRIGG_DIST`
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- `MAV_CMD_OBLIQUE_SURVEY`
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The commands cause the driver to trigger camera image capture based on time or distance.
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Each time an image capture is triggered, the `CAMERA_TRIGGER` MAVLink message is emitted.
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A "simple MAVLink camera" is one that supports the above command set.
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When configured for this kind of camera, all the driver does is emit the `CAMERA_TRIGGER` MAVLink message as expected.
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The incoming commands must be forwarded to the MAVLink camera, and are automatically emitted to MAVLink channels
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when found in missions.
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The driver is configured using [Camera Trigger parameters](../advanced_config/parameter_reference.md#camera-trigger).
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In particular:
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- `TRIG_INTERFACE` - How the camera is connected to flight controller (PWM, GPIO, Seagull, MAVLink)
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- `TRIG_MODE` - Distance or time based triggering, with values set by `TRIG_DISTANCE` and `TRIG_INTERVAL`.
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[Setup/usage information](../camera/index.md).
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### Usage {#camera_trigger_usage}
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```
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camera_trigger <command> [arguments...]
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Commands:
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start
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stop Stop driver
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status Print driver status information
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test Trigger one image (not logged or forwarded to GCS)
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test_power Toggle power
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```
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