question of "flexio_uart_edma_transfer" in SDK_25_03_00_FRDM-MCXN236

[yhc123]

I'm looking the "flexio_uart_edma_transfer" of frdmmcxn236 in code FLEXIO_UART_TX_PIN is "FLEXIOD8"  and FLEXIO_UART_RX_PIN is "FLEXIOD9"

In MCXN23X Reference Manual(page 2112, chapter 53.1.2)，"FLEXIOD8" mapped to the pin P3_0 and "FLEXIOD9" mapped to the pin P3_1, so that means FLEXIO_UART_TX_PIN is P3_0  and FLEXIO_UART_RX_PIN is P3_1.

However in the readme file of "flexio_uart_edma_transfer" P3_1 is connected to the rx pin of USB2COM and P3_0 is connected to the tx pin of USB2COM.  RX pin of FLEXIO_UART is connected to the RX pin of USB2COM and TX pin of FLEXIO_UART is connected to the TX pin of USB2COM.  Is this the right connection?

[Celeste_Liu · Accepted solution]

Hello @yhc123 ,

Thanks for contacting us. The content in readme file is wrong. The correct is:

• J8-18(P3_1), TX of USB2COM connected
• J8-17(P3_0), RX of USB2COM connected
• J8-2, Ground of USB2COM connected

I will create a Jira ticket for the internal team for this issue.

Thank you very much for pointing out our problems and helping us to improve our products.

BRs,

Celeste

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