UNSOLVED GX-MIPI-IMX662 can't save fps parameter

alex_ai

Hi,
On my new camera GX-MIPI-IMX662 I'm trying to set fps parameter (via gx_mipi_i2c.sh from 60 to 30) and save to flash by paramsave and it is working only for current session and after restart it restored back to 60 again.

How to fix it?

veye_xumm

@alex_ai I’ve just checked this function, and it works correctly. I suspect the issue lies in the way you’re operating it.

I recommend that you always change the FPS via the v4l2-ctl command to ensure consistency across different sessions. If you use gx_mipi_i2c.sh directly, the parameters can indeed be changed by writing to the camera registers, but the driver layer is not notified of these changes. As a result, the driver retains incorrect (outdated) values.

alex_ai

Hi @veye_xumm , thank you for answer, let me clarify my steps.

Boot raspberry pi 5
check current fps (it is 60):

$ ./gx_mipi_i2c.sh -r fps -b 4
Read FrameRate_Ex is 60.0000 fps

set current fps

$ ./gx_mipi_i2c.sh -w fps 30 -b 4
Write FrameRate_Ex is 30.0000 fps

check if it is set:

$ ./gx_mipi_i2c.sh -r fps -b 4
Read FrameRate_Ex is 30.0000 fps

Video opened with with 30fps correctly
save parameters to flash

$./gx_mipi_i2c.sh -w paramsave -b 4
all param saved to flash

7 . Reboot raspberry pi
8. check current fps (it is 60 again):

$ ./gx_mipi_i2c.sh -r fps -b 4
Read FrameRate_Ex is 60.0000 fps

veye_xumm

@alex_ai

You need to upgrade your camera firmware. Please refer to the link below to download the firmware, and then follow the subsequent link for the upgrade procedure.

https://www.mediafire.com/folder/4tov5s500gaif/camera_firmware_upgrade_images

https://wiki.veye.cc/index.php/GX_camera_firmware_update_manual

alex_ai

Hi @veye_xumm, I'm already on the latest version of firmware:

$ ./gx_mipi_i2c.sh -r version -b 4
Read version is C 01.14 and L 01.11

Anyway it is not critical issue for me.
I'm trying this new GX-MIPI-IMX662 as improved version of VEYE-MIPI-IMX462 for meteors detection and can't configure with same way.

If turn off denoise_strength_3D the video image is very noisy and as in gx_mipi_i2c no feature to read sensor registers, can I ask to you confirm that:
In low light environment ISP enables HCG mode (register FDG_SEL0 0x3030 sets to 0x01) ?

Maybe you have other recommendations like for IMX462 in this post :
VEYE-MIPI-IMX462 - manual gain not consistent