STM32U585 unexpected USB_RST

[martinhaefner9]

Hi,

i have a STM32U585 MB1551C board running with a custom software.

I have a tinyusb stack up and running. The device successfully appears as a vcom port on a windows pc.

But unfortunately after some time, round about 10-20sec., I get another USB_RST interrupt which causes a disconnect.

Anyone an idea why this happens ?

Kind regards

[waclawek.jan]

It's the host who issues USB reset, so you should perhaps look at some event logs there.

I'd guess you are not serving some request properly. You can try to log EP0 requests on the mcu side, too. Or use some hardware protocol analyzer on the line.

Tinyusb has no support/place to ask?

JW