Nordic development Academy Lesson 3 Exercise 1 - How to connect to RTT when no COM ports listed.

[alwalker]

Exercise 1 – Nordic Developer Academy (nordicsemi.com)

My nRF5340DK does not have COM Ports listed, only RTT. How do I connect with RTT using PuTTY or similar to display the Hello World! message please?

It might be a good idea to update the course to specify what to do.

[Shahin97]

To use RTT, the application J-Link RTT Viewer is required. 

https://www.segger.com/products/debug-probes/j-link/tools/rtt-viewer/

[alwalker]

Hi,

Thanks, I downloaded the RTT viewer and it apparently connects ok to the nRF5340DK, but I don't see the Hello World! text appearing, what else do I need to do please?

[Shahin97]

I should have mentioned, Have you tried going to Device Manager, Under Ports (COM & LPT) to see whether you have the COM PORT listed? 

If it's there, enter that into putty with a baud rate of 115200.

I don't use that IDE so I am unsure of how it works. I have redirected my UART to RTT using.

proj.conf in the root directory of my application and adding the following:

# Disable UART Console and enable the RTT console
CONFIG_UART_CONSOLE=n
CONFIG_RTT_CONSOLE=y
CONFIG_USE_SEGGER_RTT=y

[Turbo J]

Use the "Jlink configurator" application in the SEGGER program group to enable the VCOM ports.

[alwalker]

I verified in Device Manager that I have COM22 and COM23 available. Without changing the prj.conf file, I then see the Hello World! messages displayed when I set PuTTY to COM23 115200 baud.

Alternatively, if I do modify the prj.conf file to redirect the UART output to RTT, using the RTT Viewer now displays the Hello World! messages.

Case solved, thanks very much.

Kind regards,

Al