App:Library:LVGL:docs:Porting:Logging

https://docs.lvgl.io/8.2/porting/log.html

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Logging

LVGL has a built-in Log module to inform the user about what is happening in the library.

Log level

To enable logging, set LV_USE_LOG  1 in lv_conf.h and set LV_LOG_LEVEL to one of the following values:

• LV_LOG_LEVEL_TRACE A lot of logs to give detailed information
• LV_LOG_LEVEL_INFO Log important events
• LV_LOG_LEVEL_WARN Log if something unwanted happened but didn't cause a problem
• LV_LOG_LEVEL_ERROR Only critical issues, where the system may fail
• LV_LOG_LEVEL_USER Only user messages
• LV_LOG_LEVEL_NONE Do not log anything

The events which have a higher level than the set log level will be logged too. E.g. if you LV_LOG_LEVEL_WARN, errors will be also logged.

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