NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

RE: NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

kevinong — Fri, 17 Nov 2017 20:11:58 GMT

I have the same problem, but I found the root cause! You should to check "Debugged device", maybe you choose wrong MCU.

For my case, target board use nRF51822_xxAC, but "Debugged device" choose nRF51822_xxAA. The RAM size is different, RTT only load 16KB for xxAA, not 32KB for xxAC.

RE: NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

Sigurd — Thu, 24 Aug 2017 14:02:34 GMT

Are you getting the "Heart Rate Sensor example started." message in the built-in terminal in SES ?

Do you see this message if you use J-Link RTT viewer program?

If not, does it help to set NRF_LOG_DEFERRED to 0 in sdk_config.h ?

RE: NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

zed — Tue, 22 Aug 2017 14:21:06 GMT

Yup I just downloaded the SDK again and followed all the steps (which I didn't follow before, I just got it to work through reading multiple questions). The debug log is still empty, but the application is running fine.

RE: NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

Sigurd — Mon, 21 Aug 2017 07:55:25 GMT

Did you get it to work after following the guide?

RE: NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

zed — Fri, 18 Aug 2017 15:04:53 GMT

v3.25, tried also with 3.24. I'm importing from IAR. I'll try to setup that again. Note that the debug break points work, it is just the log that doesn't show.

RE: NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

Sigurd — Fri, 18 Aug 2017 15:00:42 GMT

What version of Segger Embedded Studio are you using? Could be some issue with your project file maybe. Did you follow this guide for converting the Keil ble_app_hrs project file into a Segger Embedded Studio project ?

RE: NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

zed — Fri, 18 Aug 2017 13:33:43 GMT

I build the project, download the new hex, then connect JLINK, attach debugger, Debug -> Go. The same steps work for mesh-sdk.

RE: NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

Sigurd — Fri, 18 Aug 2017 13:29:01 GMT

Just to make sure... you have started the program by selecting Debug -> Build and Run, and after that pressed the green play button ?

RE: NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

zed — Fri, 18 Aug 2017 13:09:47 GMT

Yes it works fine. The LED blinks and I can connect to it using my phone. I used both UART and RTT, neither of them show debug log in Segger IDE / RttViewer in terminal.

RE: NRF_LOG no debug log in SEGGER for BLE_SDK 12.3

Sigurd — Fri, 18 Aug 2017 13:08:10 GMT

Hi,

You always need to init the log module before you print something with NRF_LOG_INFO().

Does the application work as expected(i.e. LED 1 is blinking, and you are able to connect with your phone)?

It works fine here with

NRF_LOG_ENABLED 1
NRF_LOG_BACKEND_SERIAL_USES_UART 0
NRF_LOG_BACKEND_SERIAL_USES_RTT 1