topic Re: DMA based UART using LINFlexd in S32G

DMA based UART using LINFlexd

noorhasan — Wed, 27 Mar 2024 19:55:28 GMT

Hello,

We are trying to use LINFlexd for UART communication in DMA based implementation.

While the same Linflexd channel can be used successfully when we use it with interrupt based implementation, I can't see data being transferred after the DMA0_Ch0 ISR is triggered for DMA based implementation.

Some of the inconsistencies that we observed is related to LIN register values when Tx is triggered.

When we select UART mode in UARTCR, as per the reference manual LINTCSR[mode] should always be set to 1 (UART mode). But, as shown in the screenshot below, it is still set in LIN mode, while UARTCR is in UART Mode.

Further, the data registers are both showing not-accessible (????)

Although, before the actual data transfer, the data registers are accessible:

Thank you for helping.

@justinlydick @haoyue-yan

Re: DMA based UART using LINFlexd

noorhasan — Wed, 27 Mar 2024 20:07:41 GMT

Please close this post as it is now being followed through a new post:

https://community.nxp.com/t5/GM-MCU3-PMIC3-Product-Support/Question-from-GM-DMA-based-UART-using-LINFlexd/m-p/1836666

Re: DMA based UART using LINFlexd

haoyue-yan — Wed, 27 Mar 2024 20:23:13 GMT

Please close this ticket, the issue is being tracked else where.

Thanks

Re: DMA based UART using LINFlexd

Yhh1993 — Thu, 16 Jan 2025 07:24:23 GMT

I also encountered the same problem. Where is the solution document，thanks!

Re: DMA based UART using LINFlexd

Yhh1993 — Thu, 16 Jan 2025 07:26:46 GMT

Hello, how did you solve it afterwards

Re: DMA based UART using LINFlexd

ssimpson — Wed, 16 Apr 2025 21:32:48 GMT

Hello, I would also be interested in knowing the answer to this question.
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