SEGGER RTT printf() problem

RE: SEGGER RTT printf() problem

DragonAnger — Wed, 13 Sep 2017 09:17:39 GMT

Sorry for my late answer. I looked your project and it works! I keep tried to use SEGGER_RTT_printf() but you used NRF_LOG_INFO(). I don't know what the difference is between them but It works anyway. I really appreciate your help. Thanks!

RE: SEGGER RTT printf() problem

Petter Myhre — Tue, 05 Sep 2017 10:20:33 GMT

I just took the unmodified ble_app_uart example from SDK 12.3.0 and I only modified NRF_LOG_BACKEND_SERIAL_USES_RTT. It compiles without any problem. Some other changes are required though. You need to disable logging with uart, include a couple of files in main.c and enabled the logging module. I have attached my project if you want to have a look.

Here is the project. Should be unzipped into examples\ble_peripheral

RE: SEGGER RTT printf() problem

DragonAnger — Fri, 01 Sep 2017 00:36:50 GMT

I'm using ble_app_uart. And I tested other example that I didn't modified anything, I got same problem. Is there other way to see error code? I cannot use usb.

Thank you for your answer!

RE: SEGGER RTT printf() problem

Petter Myhre — Thu, 31 Aug 2017 11:51:45 GMT

So which example are you using? Have you modified it any way?

RE: SEGGER RTT printf() problem

DragonAnger — Thu, 31 Aug 2017 01:48:22 GMT

Yes, I use SDK 12.3.0 and I didn't know about NRF_LOG_BACKEND_SERIAL_USES_RTT.

So I tried that but I got same error message.

Anyway, Thank you for your answer!

RE: SEGGER RTT printf() problem

Petter Myhre — Wed, 30 Aug 2017 15:02:39 GMT

If you see the first sentence in the tutorial:

In SDK 12.0.0 or later, logging/debugging over RTT is built in to the logger module NRF_LOG. To enable logging over RTT, "check" the NRF_LOG_BACKEND_SERIAL_USES_RTT option in sdk_config.h in the configuration wizard.

It seems you are using SDK 12.3.0?