How to enable mcuboot logging messages on ncs v2.5.2?

[snowuyl]

I added CONFIG_MCUBOOT_UTIL_LOG_LEVEL_DBG=y to prj.conf for enabling debug messages of mcuboot. But RTT Viewer didn't show any debug messages of mcuboot.

Procedures to reproduce this issue are as follows.

1. Unzipping hello-world.zip to C:\ncs\v2.5.2\bootloader\mcuboot\samples\zephyr folder.

2. cd C:\ncs\v2.5.2\bootloader\mcuboot\samples\zephyr\hello-world

3. west build -b nrf52832_mdk

4. west flash

5. Rebooting nrf52832 MDK and connecting RTT Viewer

[Amanda Hsieh]

Hi, 

Unfortunately, there is currently no configuration that allows you to get seamless RTT logging between the bootloader and the app. Some open PRs try to address this—for instance, this one: https://github.com/zephyrproject-rtos/zephyr/pull/53569. If possible, I would recommend you use UART for now. 

Regards,
Amanda H.

[snowuyl]

Thanks for your reply!