STM32N6570-DK Camera Issue

[kevlar]

I've just received a brand new DK from Mouser and I've been trying to get the stock AI demo up and running. The camrea is connected, power is provided via a short USB-C cable on the 2nd USB connector (not the ST-Link one) and the jumpers changed over.

When I launch the AI demo via the touchscreen, the camera feed appears but there appears to be noise on the display. The camera stream appears for a few seconds before the screen greys out.

Video attached.

[AndrejsG]

Yes, it works now.

Thanks for support.

[Christophe_CMO]

Hello,

i had a similar pb (STM32n6570-DK with MB1854B camera from Elektor STM32 Ai contest), and the boad crached when trying to use camera.

The demo was OK without the camera : message of camera missing OK.

I watched explanations from "Getting started with ST BrightSense on STM32N6" (https://www.youtube.com/watch?v=mWh26gPjXeg). So i was thinking about a software bug or camera cable (i have not exactly the same).

i reflashed a demo as explained : same pb.

So about the bord supply, i was always using the USB port from PC..... and you insit about power supply.

==> i tryed with an external usb supply, and the camera waked-uo ! Camera is running now !!!

Thanks for this discution ! 

Rmk : surprised that the camera use "many" current, in my mind the screen is more "gourmand" !

[jiangfan]

some explanations:

- when STM32n6570-DK is powered from STLINK USB port and PC via USB-A_to_USB-C cable, STLINK will limit current at 550mA

- STM32n6570-DK itself will consume about 400mA current, so adding MB1854B camera will consume more and over 550mA, hence it seems that the camera use "many" current

- user may USB-C_to_USB-C cable to power STM32n6570-DK, and STLINK will limit current at 1.66A or 3.2A depending on PC status, with this configuration no problem for STM32n6570-DK with MB1854B camera to work. 550mA/1.66A/3.2A of STLINK current limit is mentioned in STM32n6570-DK Schematics.

- user may also power STM32n6570-DK from STLINK USB port via USB-A_to_USB-C cable to USB charger, with this configuration no problem for STM32n6570-DK with MB1854B camera to work

[Thierry GUILHOT]

Hi All,

We have identified a screen display issue occurring when running the AI demo on certain products. The affected products belong to batches with batch numbers up to Z5C22001. In this batch code, the digit before the "C" represents the last digit of the year (for example, "5" corresponds to 2025), and the two digits following the "C" indicate the week number of that year (for example, "22" means week 22). Therefore, all batches with numbers earlier than week 22 of 2025 are impacted.

This issue is related to the memory driver and has been resolved in demo firmware version 1.3.0 and later. You can download the latest demo firmware from STM32CubeN6.

Best Regards,

Thierry,