Openthread : How to activate the good log level traces in zephyr with otDumpDebgPlat()

[xavraz]

Hello All,
I search how to activate the good log level traces in Openthread zephyr. And in addition, i want to use otDumpDebgPlat() to prevent real time disturbance.

• The first question is where i retrieve the logs with otDumpDebgPlat() ?
• The second is how to activate the good log level with in addition CONFIG_OPENTHREAD_LOG_LEVEL_DYNAMIC activated ?

In modules/lib/openthread/src/core/api/logging_api.cpp, we retrieve otDumpDebgPlat() with
#if OT_SHOULD_LOG_AT(OT_LOG_LEVEL_DEBG) && OPENTHREAD_CONFIG_LOG_PLATFORM && OPENTHREAD_CONFIG_LOG_PKT_DUMP
Logger::DumpInModule(kPlatformModuleName, kLogLevelDebg, aText, aData, aDataLength)
#else

In modules/lib/openthread/src/core/common/log.hpp, we have :
#define OT_SHOULD_LOG_AT(aLevel) (OT_SHOULD_LOG && (OPENTHREAD_CONFIG_LOG_LEVEL >= (aLevel)))
and #define OT_SHOULD_LOG (OPENTHREAD_CONFIG_LOG_OUTPUT != OPENTHREAD_CONFIG_LOG_OUTPUT_NONE)

So, we have to activate the log correctly with OPENTHREAD_CONFIG_LOG_OUTPUT .

I have added in a project prj.conf file, this :
CONFIG_LOG=y
CONFIG_LOG_MODE_DEFERRED=y
CONFIG_LOG_BACKEND_UART=y
CONFIG_LOG_DEFAULT_LEVEL=3
CONFIG_OPENTHREAD_LOG_LEVEL_DYNAMIC=y

But it is not enough. I have to have the following definitions :
#define OPENTHREAD_CONFIG_LOG_PLATFORM 1
#define OPENTHREAD_CONFIG_LOG_PKT_DUMP 1
#define OPENTHREAD_CONFIG_LOG_LEVEL OT_LOG_LEVEL_INFO
#define OPENTHREAD_CONFIG_LOG_OUTPUT OPENTHREAD_CONFIG_LOG_OUTPUT_PLATFORM_DEFINED

But i don't know where to put these definitions.
I have set in modules/lib/openthread/include/openthread/platform/logging.h but it is not the good place, i think.
Ideally, a file like modules/lib/openthread/tests/toranj/openthread-core-toranj-config-posix.h which includes :
#define OPENTHREAD_CONFIG_LOG_OUTPUT OPENTHREAD_CONFIG_LOG_OUTPUT_PLATFORM_DEFINED

Thanks in advance for your support

[dleach02]

@rlubos do you have any suggestions here?

[rlubos]

OpenThread logging can be enabled with CONFIG_OPENTHREAD_DEBUG=y, and then the log level specified with a respective CONFIG_OPENTHREAD_LOG_LEVEL_* option, for example CONFIG_OPENTHREAD_LOG_LEVEL_DEBG=y.

The first question is where i retrieve the logs with otDumpDebgPlat() ?

I'm not sure if there's anything special about this particular function? I'd expect the log output to be forwarded to the default platform logger implementation:
https://github.com/zephyrproject-rtos/zephyr/blob/main/modules/openthread/platform/logging.c

The second is how to activate the good log level with in addition CONFIG_OPENTHREAD_LOG_LEVEL_DYNAMIC activated ?

After looking into the code I don't think dynamic log level support is actually implemented in Zephyr's OT port, at least I couldn't find an implementation of otPlatLogHandleLevelChanged() in our logger module.

But i don't know where to put these definitions.

Typically we create a corresponding Kconfig option for OT configuration options, and then translate them in a Zephyr-specific config file:
https://github.com/zephyrproject-rtos/zephyr/blob/main/modules/openthread/platform/openthread-core-zephyr-config.h