How to setup Zephyr for RTT logging with nRF9160

RE: How to setup Zephyr for RTT logging with nRF9160

Pertti Kasanen — Fri, 26 Apr 2019 09:47:10 GMT

Now things have worked properly. When using the "Configure nRF Connect SDK project" editor.

When I was modifying prj.conf directly, something went wrong. I did not have a proper version control set up then for that project so cannot check what was the difference...

RE: How to setup Zephyr for RTT logging with nRF9160

Hakon — Fri, 26 Apr 2019 08:47:27 GMT

Hello. what project were you running when it worked? And when it didn't? What did the .conf file look like in that case?

RE: How to setup Zephyr for RTT logging with nRF9160

Pertti Kasanen — Thu, 11 Apr 2019 16:08:06 GMT

I have not really figured this out yet. Did not manage to copy the working configuration to another project yet...

RE: How to setup Zephyr for RTT logging with nRF9160

Pertti Kasanen — Thu, 11 Apr 2019 13:13:36 GMT

Now after a few more experiments, RTT logging is working for the first time. Need to test what made the difference.
The working setup had only two lines with changes

CONFIG_SERIAL=y
CONFIG_UART_CONSOLE=n

Here is the conf that is working.

CONFIG_TRUSTED_EXECUTION_NONSECURE=y

#CONFIG_NO_OPTIMIZATIONS=y
CONFIG_PRINTK=y
CONFIG_CONSOLE=y

# UART logging devzone.nordicsemi.com/.../nrf91-zephyr-enable-lte-logging
#CONFIG_LOG=y
#CONFIG_SERIAL=y
#CONFIG_STDOUT_CONSOLE=y
#CONFIG_UART_INTERRUPT_DRIVEN=y
# or disable it
CONFIG_SERIAL=y
CONFIG_STDOUT_CONSOLE=y

#docs.zephyrproject.org/.../nordic_segger.html
CONFIG_UART_CONSOLE=n
CONFIG_RTT_CONSOLE=y
CONFIG_HAS_SEGGER_RTT=y
CONFIG_USE_SEGGER_RTT=y

#CONFIG_LOG_BACKEND_RTT=y
#CONFIG_SHELL_BACKEND_RTT=y
#CONFIG_LOG_BACKEND_RTT_FORCE_PRINTK=y