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T
TatianaP
Associate II
May 15, 2026
Question

How to change the camera parameters or the ISP in STM32N6570-DK Board

  • May 15, 2026
  • 1 reply
  • 113 views

Hi! I’m working with the STM32N6570-DK board using an object detection AI model, and I would like to manually modify the camera parameters. I believe settings such as exposure, white balance, and similar controls are currently configured automatically, but I want to use fixed/manual values instead.

I already tried modifying the cmw_camera.c file, but nothing changed. Which files do I actually need to modify in order to set specific camera parameter values? Do I need to use a dedicated tool for this?

I’m using the IMX335 camera module.

 
 

1 reply

J
JMar
Explorer II
May 19, 2026

Hi, I my projects, the parameters you are referring to were set in a header file called "imx335_E27_ISP_param_conf.h" in particular, there are the options ".AECAlgo" and ".AEWAlgo" that can be disabled.

My modifications for setting fixed values instead of the automatic exposure algo were getting the following code:

 .sensorGainStatic = {
 .gain = 0,
 },
 .sensorExposureStatic = {
 .exposure = 0,
 },
 .AECAlgo = {
 .enable = 1,
 .exposureCompensation = EXPOSURE_TARGET_0_0_EV,
 .antiFlickerFreq = ANTIFLICKER_NONE,
 },

into this code:

 .sensorGainStatic = {
 .gain = 0,
 },
 .sensorExposureStatic = {
 .exposure = 16072,
 },
 .AECAlgo = {
 .enable = 0,
 .exposureCompensation = EXPOSURE_TARGET_0_0_EV,
 .antiFlickerFreq = ANTIFLICKER_NONE,
 },

 

I did it manually, testing arbitrary values, but I think the rightest way to do it would be by using the STM32-ISP-IQTune software (I did not tried it so I am not sure of what I am saying).

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