RTT viewer is not working

[siltvm]

Hi,

I am currently developing a project using the nRF52810 as my controller and SEGGER Embedded Studio (version 5.42a) as my IDE. I have successfully integrated the Timer and SAADC peripherals into the ble_app_uart/pca10040e/s112 example project from the nRF5 SDK.

My problem is that I can't use J-Link RTT Viewer for debugging. When I open the J-Link RTT Viewer and connect it to my board, I can't see any debug messages or information in the RTT console. What could be the reasons for this? Is there any SDK configuration macro that needs to be enabled or disabled to use the RTT Viewer, or could the problem be related to the connection parameters?

Any response would be valuable.

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Project Details:

• SDK: nRF5 SDK 17.0.2
• IDE: SEGGER Embedded Studio 5.42a
• Controller: nRF52810
• Peripherals: Timer and SAADC (using default configuration for SAADC, with a 12-bit resolution)

Thank you for your support.

Best regards,
SILTVM

[Vidar Berg]

Hello,

Do you see the RTT log if you start a debug session in Segger Embedded studio instead? Have you also tried this with the original ble_app_uart example?

Best regards,

Vidar

[siltvm]

hi , Vidar Berg ,I just checked the example app_ble_uart_pca10040e_s112 code in debug mode while connecting it to JTAG. The debug terminal does not display anything. What could be the reason for that?

[siltvm]

no the device is not advertising 

[siltvm]

     I apologize for the incorrect response. When debugging the code, I can see the debug terminal logs, but why is the RTT log viewer not working?

[Vidar Berg]

Note that it's not possible have an open debug session in SES and use RTTViewer at the same time. Are you able to connect the RTTViewer? Please post a picture of what you are seeing.

[siltvm]

hi , Vidar Berg when clicking the jlink rtt viewer there is a connection window appears, like this 

After clicking OK, the connection successful indication appears.

[Vidar Berg]

You can try to lower the SWD clock speed to 4000. Please also confirm that you don't have any other active debug sessions when you connect RTTViewer.

[siltvm]

hi , Vidar Berg .Ensured that no other debug session is running in the background. SWD clock speed changed to 4000, but there is no effect

[siltvm]

is there any sdk config macro enabling is needed ?

[Vidar Berg]

There are no additional configurations required to use the RTT Viewer. If you can view RTT logs in SES, then RTT logging is correctly enabled.

[siltvm]

hi , Vidar Berg Then what was the reason for the log messages not displaying in the RTT viewer?

[Vidar Berg]

It's difficult to say why you are seeing logs in SES but not in the RTTViewer. I suggest enabling periodically print an RTT message in the ble_app_uart example and verify that in works in SES. Then try the RTTViewer. Maybe it is only missing the logs printed on startup.