log is not printed on J-Link RTT Viewer

RE: log is not printed on J-Link RTT Viewer

Simon — Thu, 08 Jul 2021 09:18:43 GMT

[quote user="Carl Sun"]ut still some printk logs can not be printed on RTT viewer. What is the problem? what can I do?[/quote]

Can you upload a zipped project that demonstrates this issue?

RE: log is not printed on J-Link RTT Viewer

Carl Sun — Thu, 08 Jul 2021 08:55:44 GMT

hi, I added this line in prj.conf:

CONFIG_LOG_BUFFER_SIZE=4096

and ran cmake before I compile the project.

now there is no message like "messages dropped", but still some printk logs can not be printed on RTT viewer. What is the problem? what can I do?

Thanks.

Carl.

RE: log is not printed on J-Link RTT Viewer

Simon — Wed, 07 Jul 2021 11:43:14 GMT

It seems like StefXinet is mixing the nRF5 SDK and the nRF Connect SDK (NCS). You will not find any sdk_config.h file in NCS.

To get rid of the "26 messages dropped" message increase the config CONFIG_LOG_BUFFER_SIZE in prj.conf. Check the file <sample>/<build folder>/zephyr/.config to see what it's set to by default.

Best regards,

Simon

RE: log is not printed on J-Link RTT Viewer

Carl Sun — Wed, 07 Jul 2021 09:58:31 GMT

Thanks.

Carl

RE: log is not printed on J-Link RTT Viewer

StefXinet — Wed, 07 Jul 2021 09:48:30 GMT

You could search in your code where those definitions are located. I suppose that the names are the same

RE: log is not printed on J-Link RTT Viewer

Carl Sun — Wed, 07 Jul 2021 09:16:46 GMT

I am using nRF5340 project, we use zephyr, it seems we don't have skd_config.h any more?

RE: log is not printed on J-Link RTT Viewer

StefXinet — Wed, 07 Jul 2021 09:14:40 GMT

You can find them in sdk_config.h

RE: log is not printed on J-Link RTT Viewer

Carl Sun — Wed, 07 Jul 2021 09:12:59 GMT

Hi， Thanks,

In which file should I change this value?

I am using nRF5340 and SDK v1.4.2

Thanks.

Carl.

RE: log is not printed on J-Link RTT Viewer

StefXinet — Wed, 07 Jul 2021 08:11:11 GMT

Hello,

you could try to increase the RTT buffer dimension: SEGGER_RTT_CONFIG_BUFFER_SIZE_UP, In one of my project it is 512

also you should increase the NRF_LOG_BUFSIZE and NRF_LOG_STR_PUSH_BUFFER_SIZE

bye,