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samples: drivers: video: add capture to lvgl sample #71463

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merged 1 commit into from
Sep 26, 2024
Merged

samples: drivers: video: add capture to lvgl sample #71463

merged 1 commit into from
Sep 26, 2024

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CharlesDias
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@CharlesDias CharlesDias commented Apr 13, 2024 •
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@zephyrbot zephyrbot added the area: Samples Samples label Apr 13, 2024
@CharlesDias CharlesDias marked this pull request as draft April 13, 2024 15:07
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CharlesDias commented Apr 13, 2024 •
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Dear @kartben and @nashif.

This sample has been tested on the mini_stm32h743 target with the OV2640 camera model. It depends on the PR #71462.

Should I move this sample to board-specific samples folder?

west build -p -b mini_stm32h743 samples/subsys/video/capture_to_lvgl/ -- -DCONFIG_BOOT_DELAY=2000

This version works with "VIDEO_SW_GENERATOR"

west build -p -b mini_stm32h743 samples/drivers/video/capture_to_lvgl/ -- -DCONFIG_BOOT_DELAY=2000

and with shield #77949.

west build -p -b mini_stm32h743 samples/drivers/video/capture_to_lvgl/ --shield weact_ov2640_cam_module -- -DCONFIG_BOOT_DELAY=2000

Thanks!

document_4958923842157282345.mp4

@CharlesDias CharlesDias mentioned this pull request Apr 13, 2024
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@CharlesDias CharlesDias force-pushed the video_capture_to_lcd branch 3 times, most recently from 2ef83aa to 6d4059d Compare April 14, 2024 08:37
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Fix compliance check errors.

The error "Found references to undefined Kconfig symbols" happened because this PR depend on the PR #71462

@CharlesDias CharlesDias mentioned this pull request Apr 17, 2024
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@CharlesDias CharlesDias force-pushed the video_capture_to_lcd branch 3 times, most recently from 5c3a8bf to e3c5082 Compare April 17, 2024 21:54
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Fix image alignment

document_4972170831263171749.mp4

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git rebase

@CharlesDias CharlesDias mentioned this pull request Apr 25, 2024
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Add the clock rate control property. This property depend on #71962

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Remove shell device, increase main stack size, and change the video buffer array from 1 to 2.

@CharlesDias CharlesDias force-pushed the video_capture_to_lcd branch 2 times, most recently from 82464f5 to aebab04 Compare April 27, 2024 20:53
@CharlesDias CharlesDias marked this pull request as ready for review April 27, 2024 20:56
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josuah commented May 4, 2024

As I understand it, with the LVGL addition, this makes it closer to a demo (showing most of the capabilities of a system) than a sample code (minimal code to implement a single feature).

Is LVGL required for the video to display flow to work?
Maybe splitting/moving it to a separate sample inside samples/module/lvgl since it requires the LVGL module?

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josuah commented Sep 17, 2024

Well, actually the shield is merged now! :)
So while moving the config to the shield is a good thing to do, you can now do this in this PR.
Doing so will also trigger a new CI cycle.

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Well, actually the shield is merged now! :)

Unfortunately, no! The shield PR is still open. I just removed it from the PR dependency list above.

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CharlesDias commented Sep 17, 2024 •
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git commit --amend to force CI to run.

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The CI passed now! Thanks for the tip, @josuah! :-)

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josuah previously approved these changes Sep 17, 2024
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There is one last reference to something that is just about to be merged :shield: weact_ministm32h7xx_ov2640.
The rest all looks like being ready.

Some config like CONFIG_VIDEO_HFLIP or DT_HAS_CHOSEN(zephyr_camera) are not used by this example, but were still tested against a custom shield (being submitted), so are known to work, and can be used by anyone integrating their own shield in the future.

This currently works with the test pattern generator.

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Rebase.

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Update the samples.yaml by adding the integration_platforms; removed the pll and rcc configuration from mini_stm32h743.overlay; changed the default video width and height to the 320x240 resolution because display on native_sim/native/64 has the 320x240 size resolution.

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This looks very minimal now. Easy to use as a starting point for graphics + video.

samples/drivers/video/capture_to_lvgl/README.rst Show resolved Hide resolved
kartben
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samples/drivers/video/capture_to_lvgl/README.rst Outdated
Comment on lines 5 to 6
This sample application demonstrates how to use the video API to retrieve video
frames from a capture device and display them on an LCD via the LVGL library.
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This should be much shorter and written as id completing the sentence "this sample shows how to..."

Suggested change
This sample application demonstrates how to use the video API to retrieve video
frames from a capture device and display them on an LCD via the LVGL library.
Capture video frames and display them on an LCD using LVGL.

Will be much more consistent with other samples, too: https://builds.zephyrproject.io/zephyr/pr/71463/docs/samples/drivers/video/video.html

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Done. Thanks!

samples/drivers/video/capture_to_lvgl/README.rst Outdated
a video capture device, writes a frame count message to the console, and then sends
the frame to an LCD display.
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Suggested change
a video capture device, writes a frame count message to the console, and then sends
the frame to an LCD display.
a video capture device, write a frame count message to the console, and then send
the frame to an LCD display.

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Done.

@CharlesDias
samples: drivers: video: add capture to lvgl sample
d823ee6 
Add sample application to capture an image frame from a camera
and send it for display on LCD via the LVGL library.

Signed-off-by: Charles Dias <charlesdias.cd@outlook.com>
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Implemented @kartben suggestions.

@josuah josuah mentioned this pull request Sep 25, 2024
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@nashif nashif merged commit 57a8a7c into zephyrproject-rtos:main Sep 26, 2024
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@CharlesDias CharlesDias mentioned this pull request Oct 13, 2024
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@kartben kartben kartben approved these changes

@josuah josuah josuah approved these changes

@nashif nashif Awaiting requested review from nashif

@loicpoulain loicpoulain Awaiting requested review from loicpoulain

@erwango erwango Awaiting requested review from erwango

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area: LVGL Light and Versatile Graphics Library Support area: Samples Samples area: Video Video subsystem
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@CharlesDias @josuah @loicpoulain @kartben @erwango @nashif @zephyrbot