Clear example using Segger RTT on Zephyr with SES and nRF5340-PDK?

[navigator]

Nordic boards come with the awesome JLINK-OB, and I'd love to use Segger RTT for app tracing, but have been not been able to get it working in Zephyr using the nRF5340-PDK.   I looked around DevZone and tried some suggestions targeted to the nRF9160, but ultimately was unsuccessful. 

My primary need is fast output that can be directed to RTT logging window that can be docked in SES.   

Can this be done, and are any zephyr examples available?   A simple "hello world" using RTT would be great.

Thanks in advance.

[Susheel Nuguru]

On some experimental project I was doing, I was using the below configuration in my proj.conf and it worked quite fine with the segger logs

CONFIG_USE_SEGGER_RTT=y
CONFIG_SEGGER_RTT_MAX_NUM_UP_BUFFERS=3
CONFIG_SEGGER_RTT_MAX_NUM_DOWN_BUFFERS=3
CONFIG_SEGGER_RTT_BUFFER_SIZE_UP=28000
CONFIG_SEGGER_RTT_BUFFER_SIZE_DOWN=16
CONFIG_SEGGER_RTT_PRINTF_BUFFER_SIZE=14000
CONFIG_SEGGER_RTT_MODE_NO_BLOCK_SKIP=y
CONFIG_SEGGER_RTT_MODE=0

You might also take a look at this thread to see how to stop uart from flushing to the console. The logging mechanism is the same for any variant in Zephyr.

[Susheel Nuguru]

I do not have any example to show you this. But it must be very straightforward. Just use the API shown here and set the backend to RTT as my initial reply.