libuarte retarget ?

[RixtronixLAB]

Dear Members,

I got this error

.\_build\nrf52840_xxaa.axf: Error: L6218E: Undefined symbol app_uart_put (referred from retarget.o).

SDK_config.h is included,

What's missing from that file ?

1537.sdk_config.h

Thank you

[Vidar Berg]

Hello,

retarget.c is made for the app_uart library, and does not work with libuarte. I suggest you remove retarget.c from your project.

Best regards,

Vidar

[RixtronixLAB]

Hi, Vidar,

Thanks for the reply

Ok, I'll remove it and let's see...

[Vidar Berg]

You can view the logs with Jlink RTT Viewer og Jlink RTT Client: https://www.segger.com/products/debug-probes/j-link/technology/about-real-time-transfer/

[RixtronixLAB]

https://www.segger.com/products/debug-probes/j-link/tools/rtt-viewer/ ?

It's different with serial ?

[RixtronixLAB]

That one ?

[RixtronixLAB]

What's the function for printing message to J-link rttviewer ?

[RixtronixLAB]

This one is related ?

devzone.nordicsemi.com/.../debugging-with-real-time-terminal

[Vidar Berg]

The post you linked to is outdated. Now, most of the SDK examples come ready with RTT logging support, just make sure you have the NRF_LOG_BACKEND_RTT_ENABLED option enabled in your sdk_config.h file. 

Testing RTT logging with the original libuarte example

1. Add #include "nrf_log.h" at the beginning of main.c

2. Add this line somewhere after the logger as been initialized in main():  NRF_LOG_INFO("Libuarte example started");