topic Re: IMXRT117x USB System error in i.MX RT Crossover MCUs

IMXRT117x USB System error

jimmyam — Wed, 26 Jun 2024 07:03:54 GMT

Hi All,

I was having a random USB error (Micro : IMXRT 117x) where the USB pen drive attach would not get detected SOME TIMES. Most of the time it works as expected and enumerates, but when this issue happens even if I unplug the device and then re-plug it back, it would not get detected.

I was debugging the issue and it seems when this issue happens I get USB HOST EHCI error interrupt; But it seems in the ISR 'USB_HostEhciIsrFunction' , (in file usb_host_ehci.c) even if it gets 'USBHS_USBSTS_SEI' it is not handled.

Is it possible to reset the host controller (if there is a system error) and get it back working? If so, how can I do that?

I really appreciate if someone can think of any clues here,

Regards,

Jim

Re: IMXRT117x USB System error

EdwinHz — Wed, 03 Jul 2024 21:41:23 GMT

Hi @jimmyam,

How often does this issue happen? Does it happen with another USB pen drives as well?

You can try de-initializing and re-initializing the USB module by using:

USB_HostDeinit();
USB_HostDeinit();

Or, you could also reset the whole system with:

NVIC_SystemReset();

BR,
Edwin.

Re: IMXRT117x USB System error

Sam_Gao — Thu, 04 Jul 2024 08:49:20 GMT

Hi @jimmyam

It's hard to say the root cause or give you some good direction currently, I am not sure if random USB issue is from h/w or s/w, but to my knowlege, you may check:

If the tasks override interrupt when issue happend

Host Power configure or unstable voltage

And would you please give me more details/backgroud about this project(it is an USB pen base on RT117x? PC Plugin?), how to reproduce it? Which sdk example/version are you using?

B.R./Sam

Re: IMXRT117x USB System error

jimmyam — Fri, 05 Jul 2024 07:58:31 GMT

Thank you Edwin. I tried this, however did not improve the situation.

Re: IMXRT117x USB System error

jimmyam — Fri, 05 Jul 2024 08:01:32 GMT

Hi Sam,

Thank you for your response, probably I will continue talking to you through mail.

Regards,

Jimmy

Re: IMXRT117x USB System error

tbonkers — Fri, 13 Mar 2026 08:03:16 GMT

Have you been able to solve that? I am having the same issue, enumeration fails on cold boot and USBSTS.SEI bit is set. My processor is MIMXRT1166.