i.MX ProcessorsのトピックRe: USB interrupt check detection

USB interrupt check detection

ajita02 — Fri, 04 Aug 2023 08:46:31 GMT

Hi all,

I am using IMX8MM platform as slave USB device. I want to implement parallel ISR on USB detection interrupt. When USB is connected with host, slave USB driver would have generated some software interrupt. I want to use that interrupt as indication to top user application using custom ISR on it. I can see below interrupt in `/proc/interrupt`.

` 58: 0 0 0 0 GICv3 72 Level 32e40000.usb`

Please help me to achieve this.

Thanks,

Ajita

Re: USB interrupt check detection

ajita02 — Fri, 04 Aug 2023 09:10:30 GMT

@Rita_Wang @asim_zaidi @weidong_sun @riteshmpatel

Please provide a lead.

Re: USB interrupt check detection

Dhruvit — Mon, 07 Aug 2023 12:41:38 GMT

Hi @ajita02,

I hope you are doing well.

For the information related to the interrupt over USB detection, kindly refer to section 11.1.2.4 Interrupts from the reference manual IMX8MMRM

Please refer to the Interrupt Enable Register and USB Status register for more details.

Thanks & Regards,

Dhruvit Vasavada

Re: USB interrupt check detection

ajita02 — Tue, 08 Aug 2023 05:28:52 GMT

Hi @Dhruvit ,

Thank you for your reply. I will take a look and update you.

Regards,

Ajita

Re: USB interrupt check detection

ajita02 — Wed, 09 Aug 2023 05:39:00 GMT

Hi @Dhruvit ,

I found a solution. `udevadm` is useful to get device driver's events. Just need to add a rule and run script when event occur.

Thanks for your help.

Ajita