Logging SDK15 Segger RTT

RE: Logging SDK15 Segger RTT

Einar Thorsrud — Thu, 26 Jul 2018 06:27:03 GMT

Glad to hear you fixed it. Thanks for letting us know what the problem was.

RE: Logging SDK15 Segger RTT

W9 — Wed, 25 Jul 2018 15:12:00 GMT

I as finally able to get logging active on Segger RTTviewer. I think I just wasn't waiting long enough for the bootloader to timeout and fire up again. Now I working on getting it active within my app.

Thanks,

Wayne

RE: Logging SDK15 Segger RTT

Einar Thorsrud — Mon, 23 Jul 2018 14:03:39 GMT

Hi,

Do you call NRF_LOG_PROCESS() repeatedly so that you ensure that the queue is emptied? You should call it until it returns false before you e.g. go to sleep.

RE: Logging SDK15 Segger RTT

W9 — Mon, 23 Jul 2018 13:21:04 GMT

I did have DEFERRED_LOGGING enabled. I added the NRF_LOG_PROCESS() in my main loop, but I still don't see anything with RTTViewer. However, if I launch (SEGGER) GDB_server and then RTTClient, I see some logs in the Client window. (My understanding was that RTTViewer is a stand-alone program that does not the GDB-server running)

I must still have some config error that is hiding the logs from RTTViewer.

RE: Logging SDK15 Segger RTT

Einar Thorsrud — Mon, 23 Jul 2018 12:28:43 GMT

Hi,

It should be enough to call NRF_LOG_INIT(NULL) and NRF_LOG_DEFAULT_BACKENDS_INIT() (I assume NRF_BACKEND_INIT() which you wrote was a typo).

The typical reasons for not seeing RTT output are:

Incorrectly configured sdk_config.h, or
Deferred logging enabled in sdk_config.h but not handled in the application main loop (no calls to NRF_LOG_PROCESS()).