How to print the debugging message in the nrf52840 custom board

[sharmelaraju]

Hi,

we have designed the nrf52840 custom board.The programming is working correctly in the custom board using the gnd detect,vtg swdio, swd clk pins.Here the problem is the debugging message is not printed  in the terminal where the debugging message is printed on the dk board.

plz give me solution to print the debugging message on the custom board

[awneil]

sharmelaraju said:

the terminal

What terminal?

are you using UART, or RTT ?

sharmelaraju said:

the debugging message is printed on the dk board.

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!

[Simonr]

Hi

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

[sharmelaraju]

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.

[awneil]

sharmelaraju said:

I am using NRF_LOG_BACKEND_RTT_ENABLED

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...

sharmelaraju said:

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

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/

[sharmelaraju]

Thanks for the reply.

It worked out.