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