2022年6月22日 (水) 14:39時点における版

英文	自動翻訳

Logging

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

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.

If your system supports printf, you just need to enable LV_LOG_PRINTF in lv_conf.h to send the logs with printf.

If you can't use printf or want to use a custom function to log, you can register a "logger" callback with lv_log_register_print_cb().

@@ 27行目: / 27行目: @@
+== Printing logs ==
+=== Logging with printf ===
+If your system supports <code>printf</code>, you just need to enable <code>LV_LOG_PRINTF</code> in <code>lv_conf.h</code> to send the logs with <code>printf</code>.
+=== Custom log function ===
+If you can't use <code>printf</code> or want to use a custom function to log, you can register a "logger" callback with <code>lv_log_register_print_cb()</code>.
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