S32GのトピックRe: gpioset recover failed based on SDK BSP39 on RDB2

gpioset recover failed based on SDK BSP39 on RDB2

hittzt — Mon, 01 Apr 2024 03:47:00 GMT

Hi,

I recently tested gpio APIs, and found that when try to set back the value of one gpiochip using gpioset, but failed. The whole log is attached.

Would you please help to confirm the issue?

Thanks,

Zhantao

Re: gpioset recover failed based on SDK BSP39 on RDB2

chenyin_h — Tue, 02 Apr 2024 10:45:26 GMT

Hello, @hittzt

Thanks for the question.

May I know if you ever used gpioget to collect the status of the pin during the test?

Best Regards

Chenyin

Re: gpioset recover failed based on SDK BSP39 on RDB2

hittzt — Mon, 08 Apr 2024 08:46:20 GMT

Hi @chenyin_h,

Yes, I checked the status of the pin.

You can easily reproduce the issue.

Thanks,

Zhantao

Re: gpioset recover failed based on SDK BSP39 on RDB2

chenyin_h — Tue, 09 Apr 2024 07:25:37 GMT

Hello, @hittzt

Thanks for the feedback.

From my opinion, the test method seems not very reasonable according to the notes from gpioset command:

“The state of a GPIO line controlled over the character device reverts to default when the last process referencing the file descriptor representing the device file exits. This means that it's wrong to run gpioset, have it exit and expect the line to continue being driven high or low...”

Best Regards

Chenyin