STM32N6570-DK AI demo not working

[ClosedBridge]

Hello,

I recently bought the newly released development kit STM32N6570-DK that includes a touch screen and a MIPI camera manufactured by ST. It comes preprogrammed with some nifty demos, including the AI demo which should show off the AI capabilities with a stream from the included camera. When I load the AI demo the screen freezes up, and I can see the backlight to the screen turn off.

Additionally I noticed there are some level shifters (TR1 on the camera module) on the PCB for the camera that either carry a clock or data line for MIPI. When I activate the demo the 3.3V line starts toggling at about 160MHz for about 2ms, and then stays low after that.

For reference, I am powering the dev kit off of a USB 3.0 port on my laptop.

Could you help me identify if this is a camera module, dev kit, power, or cable issue?

Thanks,

-Alex

[jiangfan · Accepted solution]

Yes, STM32N6570-DK comes preprogrammed with some nifty demos, including the AI demo which should show off the AI capabilities with a stream from the included camera. The AI demo with the included camera needs more power/current. So, it is suggested to power the board via USB-C to USB-C cable, either from laptop or USB-C charger. Optionally, you may power board with USB-A to USB-C cable at USB1 port and jumper JP2 at 3-4 5V_USB_SNK position - no current limit circuit in this power path.

USB-A to USB-C cable connecting between on board ST-LINK/V3EC port and laptop is not enough to provide the needed current, hence you "can see the backlight to the screen turn off", meanwhile you should see LD3 turning RED on which means over-current status.

[ClosedBridge]

Thank you! Powering over USB1 and changing the J2 jumper works.