STM32L476 USB HAL errors Topic is solved

[lilvinz]

Bumping this thread as it has been marked as resolved.

[Giovanni]

Hi,

Removed the mark. Isn't that option available to you too?

Giovanni

[lilvinz]

I don't see, how. Maybe the thread-starter can do it though.

Cheers

Vinz

[rawsock]

I got exactly the same results, i.e. USB_EP0_SENDING_STS upon USB/CDC enumeration on custom STM32L476 board. Disabling assertions 'fixes' the problem.

[Giovanni]

Hi,

It is odd, on my home desktop running Linux Mint I get the problem, on a Win7 laptop it works... I need to swap boards and see if it is the same.

Are you guys using Linux while experiencing this?

Giovanni

[lilvinz]

Hi Giovanni,

using Linux Mint only.

Cheers

Vinz

[rawsock]

I'm using Win10 64bit, USB3.0, default Windows USB/CDC driver. Maybe it has something to do with USB controller and/or driver timing.

[Giovanni]

Hi,

It is a time-dependent issue, on my Mint Laptop the problem was also triggered but in a different assertion. I noticed that the problem always occurred while serving an OUT endpoint, it is like IN interrupts are delayed somehow.

I commit a tentative fix: Reversed the order of EP IRQ servicing, OUT first then IN. It appears to fix the issue on both my desktop and my laptop, could you confirm if it is fixed on your side? if so I will proceed with a release ASAP.

Giovanni

[lilvinz]

Hi Giovanni,

i tested reversing the order with no difference. The problem still persists.

Cheers

Vinz

[Giovanni]

Does it stop in the same assertion for you?

Giovanni