Thingy53 printk doesn't work with Segger j-link

[DCT_3]

Hey

My development team and I are trying to move from the nrf5 sdk to the ncs. For this reason, we bought the Thingy53 as it has the desired nrf5340 microcontroller. 

The issue is the "printk" function which I cannot get to output on the terminal.

I am following the online course "nRF Connect SDK Fundamentals," Everything works fine until lesson 3, exercise 1, which I follow as described.

After flashing the device and opening the vcom (setting: 115200 8n1 RTSCTS:off) nothing is displayed in the open terminal.

I am programming the Thingy53 with Segger j-link, and in vs code the vcom is displaying. (i have enabled the vcom in j-link commander) 

The screenshot below shows the contents of the main.c

Best regard Alex

[Amanda Hsieh]

Hi, 

Seems VSCode cannot connect the USB CDC AMC on Thing53. The vcom might be for the netcore.  

Are you able to get the log from nRF Connect/Serial Terminal?

Regards,
Amanda H.

[DCT_3]

Hi Amanda,

Thanks for your reply.

I could connect to thingy53 via the USB com port and received the string.

It could be nice if there were a note in the exercise stating that the "printk" function would be output on USB on Thingy53.

Regards,

Alex

[Amanda Hsieh]

Thanks for the feedback. 

-Amanda H.

[Sachin Rawat]

Hi,

Use this config, add this in your prj.conf, BTW this will work with jlink Viewer

# Config logger

CONFIG_LOG=y    

CONFIG_USE_SEGGER_RTT=y

CONFIG_LOG_BACKEND_RTT=y    

CONFIG_LOG_BACKEND_UART=y  

CONFIG_UART_RTT=y  

CONFIG_RTT_CONSOLE=y    

CONFIG_STDOUT_CONSOLE=y  # For using printk

CONFIG_SEGGER_RTT_BUFFER_SIZE_UP=4096  

CONFIG_LOG_BUFFER_SIZE=8192