Kinetis MicrocontrollersのトピックRe: LIN driver alters GPIO in UART mode

LIN driver alters GPIO in UART mode

ianchuter — Thu, 31 Aug 2017 14:12:55 GMT

I have an application running which communicates successfully using the LIN driver on a S9KEAZN16AMLH, however, while the LIN is communicating, the GPIO state is cleared apparently randomly - this stops if the LIN communication stops. The LIN is using UART, so does anyone know why it would be altering the GPIO state?

Re: LIN driver alters GPIO in UART mode

kerryzhou — Mon, 04 Sep 2017 03:21:24 GMT

Hi lan Chuter,

Do you mean when the LIN UART pin works, the according GPIO input status also changing?

If yes, the phenomena is correct, because even you configure the pin to other modules function, the GPIO input status also works, it is correct.

Have a great day,
Kerry

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Re: LIN driver alters GPIO in UART mode

ianchuter — Mon, 04 Sep 2017 07:30:58 GMT

Thanks for your reply. This turned out to be an issue with my code - if the interrupt occurred at a certain point the GPIO was being left in a mess - I've restructured this part of my application and it can now ride out the interrupts without issue.

Re: LIN driver alters GPIO in UART mode

kerryzhou — Mon, 04 Sep 2017 08:46:40 GMT

Hi Lan,

Thanks for your updated information.

If you still have question about it, just let me know!

Have a great day,
Kerry