topic Nonblocking scanf in i.MX RT Crossover MCUs

Nonblocking scanf

dynamix — Wed, 06 Jan 2021 00:30:26 GMT

Hey all,

I need to send a parameter to the board (imxrt1050) once in a while. I am using scanf right now, but it blocks the whole program and wait for the user input. How can I change it to a non-blocking one?

Thanks,

Re: Nonblocking scanf

kerryzhou — Wed, 06 Jan 2021 03:06:52 GMT

Hi dynamix,

Do you use the UART to receive your parameter?

If yes, I think you totally can use the UART interrupt to receive it, that one don't need to blocks the whole program, because when receive the data, it is using the interrupt.

More details, you can refer to the SDK code:

SDK_2.8.6_EVKB-IMXRT1050\boards\evkbimxrt1050\driver_examples\lpuart

There has a lot of uart interrupt code.

The SDK download link is:

https://mcuxpresso.nxp.com/

Wish it helps you!

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

If your question is solved, please help to mark the correct answer just to close this case, thanks.

Best Regards,

Kerry

Re: Nonblocking scanf

felix1 — Tue, 16 Nov 2021 10:09:01 GMT

According to my test, you can change DbgConsole_Scanf() to DbgConsole_TryGetchar() and define DEBUG_CONSOLE_TRANSFER_NON_BLOCKING. This API is non-blocking scanf().