OAK-D CM4 CSI Enable

Joko

Hello,

I was looking for information on how to enable the additional CSI connector.

The docs state that: " Note that the additional CSI connector on the OAK-D-CM4 doesn’t work by default." , couldn't find any additional reference to it.

Thanks

jakaskerl

Hi Joko
We've had some issues with the CSI port in the past where the device wouldn't boot if the camera was connected. Also there are some driver issues. Are you experiencing any of these issues?

Thanks,
Jaka

Joko

hi,

Thank you for your reply and apologize for taking long to replay back. I've been trying to get a(ny) camera to work with the CSI since i posted the question but with no success unfortunately.

I have an IMX477, IMX577 and ar0234. the main effort was with the 477. since it uses the same core as IMX290 i defined in the config.txt the dtoverlay for the 290 in many variations. i believe the issue is I2C related, since i get the following using the "dmesg | grep imx" command:

[ 0.049477] platform fe801000.csi: Fixed dependency cycle(s) with /soc/i2c0mux/i2c@1/imx290@1a

[ 4.997725] platform fe801000.csi: Fixed dependency cycle(s) with /soc/i2c0mux/i2c@1/imx290@1a

[ 9.251873] imx290 10-001a: Error writing reg 0x301c: -110

[ 10.275922] imx290 10-001a: Error writing reg 0x3020: -110

[ 11.299892] imx290 10-001a: Error writing reg 0x3018: -110

[ 12.323887] imx290 10-001a: Error writing reg 0x3020: -110

[ 44.067870] imx290 10-001a: Error writing reg 0x303a: -110

[ 44.067879] imx290 10-001a: Could not set init registers

[ 44.067884] imx290 10-001a: Start stream failed

[ 65.155871] imx290 10-001a: Error writing reg 0x303a: -110

[ 65.155880] imx290 10-001a: Could not set init registers

[ 65.155884] imx290 10-001a: Start stream failed

[ 299.366975] imx290 10-001a: Error writing reg 0x303a: -110

[ 299.366995] imx290 10-001a: Could not set init registers

[ 299.367004] imx290 10-001a: Start stream failed

The output of "libcamera-still -t 0" gives:

Made X/EGL preview window

[0:52:30.571925260] [8458] INFO Camera camera_manager.cpp:297 libcamera v0.0.5+83-bde9b04f

[0:52:30.618067306] [8462] INFO RPI vc4.cpp:437 Registered camera /base/soc/i2c0mux/i2c@1/imx290@1a to Unicam device /dev/media1 and ISP device /dev/media0

[0:52:30.618175100] [8462] INFO RPI pipeline_base.cpp:1101 Using configuration file '/usr/share/libcamera/pipeline/rpi/vc4/rpi_apps.yaml'

[0:52:30.619144475] [8458] INFO Camera camera.cpp:1033 configuring streams: (0) 960x540-YUV420

[0:52:30.619700540] [8462] INFO RPI vc4.cpp:565 Sensor: /base/soc/i2c0mux/i2c@1/imx290@1a - Selected sensor format: 1280x720-SRGGB12_1X12 - Selected unicam format: 1280x720-pRCC

[0:52:31.714560442] [8462] ERROR V4L2 v4l2_videodevice.cpp:1906 /dev/video0[16:cap]: Failed to start streaming: Connection timed out

ERROR: *** failed to start camera ***

for "i2cdetect -y 10" the output is "UU" at address 0x1a, the rest is null:

 0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f

00: -- -- -- -- -- -- -- --

10: -- -- -- -- -- -- -- -- -- -- UU -- -- -- -- --

20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

70: -- -- -- -- -- -- -- --

for config.txt i've tried the following, in various combinations (and probably some others that i modified along the way):

#camera_auto_detect=1

#dtoverlay=imx290

#dtoverlay=imx290,2lane,clock-frequency=74250000,cam1

#dtoverlay=imx290, clock-frequency=37125000

dtoverlay=i2c1

#enable_uart=1

#dtoverlay=cm-swap-i2c0,i2c10-gpio0,i2c0-gpio44

#dtoverlay=imx290

#dtoverlay=imx290,cam0

dtoverlay=imx290,clock-frequency=37125000

thanks!

Joko

made a mistake in the camera module type in the comment above but i can't edit it for some reason 🙂

the sensor i've been using is the IMX462, not 477.

Forgot to add - the device does boot with the camera connected, i believe it failed to boot only once throughout all my tests which included many reboots along the way.

jakaskerl

Joko
Yep, that was a hardware issue.

PMIC_EN was pulled low by the CM4 when RPi camera module was inserted.
Solution:
trace was cut and now the device boots up normally, due to PMIC having an internal pull-up on PMIC_EN.

Thanks,
Jaka

Joko

Hi,

Thanks for the reply.

So if i understand correctly - you've solved the booting issues (with a camera connected) but now the CSI is not usable anymore? Since my device does boot up with a camera connected i'd assume the trace cut was already done on my board.

Or is there still something that i can do to enable it and work with an external camera? If so please elaborate, i bought the board with specific intention of using the CSI and not the 3 onboard cameras.

Thanks

erik

Hi @Joko ,
Unfortunately, these HW changes were not made - I'd suggest writing to support@luxonis.com to replace the device, as CSI connector is not usable.

Joko

Hi,

Ok Thank you. I'd suggest removing the line in the docs which states that the CSI is not enabled by default as it could mislead to thinking that it is usable.

Before i contact support i have another solution that could work for me, i'd like your opinion:

Since i do not plan on using the 3 on board cameras, i could theoretically disconnect their connectors (or only one of them) and connect another camera there, correct? If so, I'd be happy to try it out. i'm looking to move the camera a few centimeters away from the board and mount it perpendicularly to it - could you point me (if you know) to camera module that use the same connector but have longer flex cable? or what connector i should look for?

Thanks!

jakaskerl

Joko
You can find sensors at https://www.uctronics.com/edge-ai.html?cat=120_modular-cameras&price=-40&product_list_limit=30, though by the looks of it, they aren't any longer. Best to contact Arducam.
As long as the sensor is listed under https://docs.luxonis.com/hardware/platform/sensors/sensors/, it should work, regardless of the variant.

Thanks,
Jaka

Joko

Hi,

Thank you very much, i'll take a look there.

Thanks