RTT Printing Method for nrf9160

[Aziz]

Hello,

I am trying to enable RTT instead of the default UART output of the nrf91dk AT client code example. I am using Segger Embedded Studio V5.34 with Nordic nRF Connect SDKv1.5.1 with nRF Connect Toolchain Version 1.5.1.

The only way I found to get RTT to print anything was manually inserting SEGGER_RTT.c/h..etc source files into each library, which isn't practical, since it doesn't handle all the existing print statements. This isn't a good solution.

I looked at some similar questions:  https://devzone.nordicsemi.com/f/nordic-q-a/50312/how-to-use-rtt-for-debugging-in-nrf9160

But, their techniques don't seem to work here. It isn't clear what exactly needs to be modified and where. For example, if autoconf.h, .config, or prj.conf needs to be modified. It seems that modifying the prj.conf file doesn't change anything. I couldn't find a clear, documented procedure that works yet.

How can I get log statements to print with RTT? 

Thanks.

[Heidi]

Hi!

You should only need to modify the prj.conf file.

See How to use RTT for the configurations to enabled:

To view the logging output using RTT, modify the configuration settings of the sample to override the default UART console:

CONFIG_USE_SEGGER_RTT=y

CONFIG_RTT_CONSOLE=y

CONFIG_UART_CONSOLE=n




You can also use RTT as one of the logging backends if you'd rather do that, by setting:

CONFIG_LOG_BACKEND_RTT=y

Best regards,

Heidi