topic Re: Issue UART_RETRY_TIMES in MCUXpresso IDE

Issue UART_RETRY_TIMES

Transidico — Fri, 21 Nov 2025 18:56:19 GMT

Good evening,

I am using LPUART1 in LPUART_WriteBlocking and LPUART_ReadBlocking mode. I need it to exit the wait mode if my UART does not receive anything within a certain number of seconds. I have noticed that there is a parameter called UART_RETRY_TIMES that can be used to set a timeout. However, when I set this parameter, I notice that a timeout is not set, but the UART no longer works correctly. Could you tell me how I can exit blocking mode with a timeout?

Thank you.

Best regards

Re: Issue UART_RETRY_TIMES

Harry_Zhang — Mon, 24 Nov 2025 03:02:13 GMT

Hi @Transidico

May I ask which chip you are using?

Harry

Re: Issue UART_RETRY_TIMES

Transidico — Mon, 24 Nov 2025 17:31:32 GMT

Hi Harry,

thanks for reply. The chip that i use is MCXC242.

Do you have some suggestions?

Thanks in advice.

Best regards

Re: Issue UART_RETRY_TIMES

Harry_Zhang — Tue, 25 Nov 2025 10:21:17 GMT

Hi @Transidico

LPUART_ReadBlocking() and WriteBlocking() of MCXC242 do not support timeout exit.
UART_RETRY_TIMES is only used internally for the 'retry check flag' and is not a timeout mechanism.
If you want UART to exit blocking after a few seconds of no data, I think you can use LPUART_ReadBlocking combined with a software timer.

Harry