topic Re: KE04 Cannot receive from UART after hot-plugging. in Kinetis Microcontrollers

KE04 Cannot receive from UART after hot-plugging.

jun1 — Mon, 07 Sep 2020 01:27:07 GMT

Hi.

Please kindly advise.

We are developing a hot-plugging package.
I communicate with the outside via RS485, but communication may not be possible when the package is inserted live.
Since the LED lighting control is working, it seems that only serial communication is disabled.
After communication is disabled, if the power of the device itself is turned OFF/ON with the package inserted, communication will start.

Is there a possibility that the UART module will be affected by the rising power supply?

jun.

Re: KE04 Cannot receive from UART after hot-plugging.

kerryzhou — Mon, 07 Sep 2020 10:00:43 GMT

Hi jun1

Do you debug your code while do the hot pluging?

You can debug your KE04, when you do the hot plugging, and the UART can't communicate, check the register, especially the status register, which error happens?

Do you clear the error register when the error happens in your code?

Wish it helps you!

If you still have questions about it, please kindly let me know!

Best Regards,

Kerry

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Re: KE04 Cannot receive from UART after hot-plugging.

jun1 — Tue, 08 Sep 2020 03:17:46 GMT

thank you for your answer.
After that, it turned out that there was another reason (communication ID error). I apologize for the trouble.
Thank you very much.

Re: KE04 Cannot receive from UART after hot-plugging.

kerryzhou — Tue, 08 Sep 2020 05:40:05 GMT

Hi jun1,

Thanks for the updated information that you have solved the issues.

Any new questions in the future, welcome to create the new question post!

Wish it helps you!

If you still have questions about it, please kindly let me know!

Best Regards,

Kerry

-------------------------------------------------------------------------------

Note:

- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored

Please open a new thread and refer to the closed one, if you have a related question at a later point in time.

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