How to print the debugging message in the nrf52840 custom board

RE: How to print the debugging message in the nrf52840 custom board

sharmelaraju — Thu, 19 Mar 2020 11:36:04 GMT

Thanks for the reply.

It worked out.

RE: How to print the debugging message in the nrf52840 custom board

awneil — Tue, 17 Mar 2020 09:35:04 GMT

[quote userid="84025" url="~/f/nordic-q-a/59154/how-to-print-the-debugging-message-in-the-nrf52840-custom-board/240157"]I am using NRF_LOG_BACKEND_RTT_ENABLED[/quote]

Then you need to use the Segger RTT viewer to see the output.

There is a standalone RTT viewer, or you can use the one built into Segger Embedded Studio...

[quote userid="84025" url="~/f/nordic-q-a/59154/how-to-print-the-debugging-message-in-the-nrf52840-custom-board/240157"]I am using "TERMITE" application to print on the display.[/quote]

Termite is just a serial terminal - it will not work with Segger RTT !

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_gsg_ses%2FUG%2Fgsg%2Fcommunicate.html

https://wiki.segger.com/RTT

https://www.segger.com/products/debug-probes/j-link/technology/about-real-time-transfer/

RE: How to print the debugging message in the nrf52840 custom board

sharmelaraju — Tue, 17 Mar 2020 06:37:48 GMT

Thanks for the reply.

I am using NRF_LOG_BACKEND_RTT_ENABLED to 1 to print the message on the display but still it is not working.

i have connected the laptop <-> USB cable<->DK board<-> SWD IO/CLK/VTG/GND<-> Custom board.

plz help me to resolve the isssues.

I am using "TERMITE" application to print on the display.

RE: How to print the debugging message in the nrf52840 custom board

Simonr — Mon, 16 Mar 2020 12:53:46 GMT

I assume you are only connected to the computer via a DK and a debug cable. In that case, you have to make sure that you are printing debug messages using RTT and not UART. This can be changed in the sdk_config.h header file, by setting the NRF_LOG_BACKEND_RTT_ENABLED to 1 and the NRF_LOG_BACKEND_UART_ENABLED to 0.

Best regards,

Simon

RE: How to print the debugging message in the nrf52840 custom board

awneil — Mon, 16 Mar 2020 12:39:50 GMT

[quote userid="84025" url="~/f/nordic-q-a/59154/how-to-print-the-debugging-message-in-the-nrf52840-custom-board"]the terminal[/quote]

What terminal?

are you using UART, or RTT ?

[quote userid="84025" url="~/f/nordic-q-a/59154/how-to-print-the-debugging-message-in-the-nrf52840-custom-board"]the debugging message is printed on the dk board.[/quote]

So look at what's different between your board, and the DK.

Remember that we have no idea what your board is - so cannot help you with that!