lv_log.h

API reference for lv_log.h

Summary

Register custom print/write function to call when a log is added. It can format its "File path", "Line number" and "Description" as required and send the formatted log message to a console or serial port.

void lv_log_register_print_cb(lv_log_print_g_cb_t print_cb)

Name	Type	Description
`print_cb`	`lv_log_print_g_cb_t`	a function pointer to print a log

misc/lv_log.h:80function

lv_log

Print a log message via printf if enabled with LV_LOG_PRINTF in lv_conf.h and/or a print callback if registered with lv_log_register_print_cb

void lv_log(const char *format,...)

Name	Type	Description
`format`	`const char *`	printf-like format string
`...`

misc/lv_log.h:91function

lv_log_add

Add a log

void lv_log_add(lv_log_level_t level, const char *file, int line, const char *func, const char *format,...)

Name	Type	Description
`level`	`lv_log_level_t`	the level of log. (From `lv_log_level_t` enum)
`file`	`const char *`	name of the file when the log added
`line`	`int`	line number in the source code where the log added
`func`	`const char *`	name of the function when the log added
`format`	`const char *`	printf-like format string
`...`

Typedefs

misc/lv_log.h:41typedef

lv_log_level_t

typedef int8_t lv_log_level_t

Used by 1 function

lv_log_add — param level

misc/lv_log.h:60typedef

lv_log_print_g_cb_t

typedef void(* lv_log_print_g_cb_t) (lv_log_level_t level, const char *buf)

Log print function. Receives a string buffer to print".

Used by 1 function

lv_log_register_print_cb — param print_cb

Macros

misc/lv_log.h:26macro

LV_LOG_LEVEL_TRACE

#define LV_LOG_LEVEL_TRACE 0

Log detailed information.

misc/lv_log.h:27macro

LV_LOG_LEVEL_INFO

#define LV_LOG_LEVEL_INFO 1

Log important events.

misc/lv_log.h:28macro

LV_LOG_LEVEL_WARN

#define LV_LOG_LEVEL_WARN 2

Log if something unwanted happened but didn't caused problem.

misc/lv_log.h:29macro

LV_LOG_LEVEL_ERROR

#define LV_LOG_LEVEL_ERROR 3

Log only critical issues, when system may fail.

misc/lv_log.h:30macro

LV_LOG_LEVEL_USER

#define LV_LOG_LEVEL_USER 4

Log only custom log messages added by the user.

misc/lv_log.h:31macro

LV_LOG_LEVEL_NONE

#define LV_LOG_LEVEL_NONE 5

Do not log anything.

misc/lv_log.h:32macro

LV_LOG_LEVEL_NUM

#define LV_LOG_LEVEL_NUM 5

Number of log levels

misc/lv_log.h:46macro

LV_LOG_FILE

#define LV_LOG_FILE __FILE__

misc/lv_log.h:47macro

LV_LOG_LINE

#define LV_LOG_LINE __LINE__

misc/lv_log.h:101macro

LV_LOG_TRACE

#define LV_LOG_TRACE(...) \
    do {}while(0)

misc/lv_log.h:109macro

LV_LOG_INFO

#define LV_LOG_INFO(...) \
    do {}while(0)

misc/lv_log.h:115macro

LV_LOG_WARN

#define LV_LOG_WARN(...) \
    lv_log_add(LV_LOG_LEVEL_WARN, LV_LOG_FILE, LV_LOG_LINE, __func__, __VA_ARGS__)

misc/lv_log.h:123macro

LV_LOG_ERROR

#define LV_LOG_ERROR(...) \
    lv_log_add(LV_LOG_LEVEL_ERROR, LV_LOG_FILE, LV_LOG_LINE, __func__, __VA_ARGS__)

misc/lv_log.h:131macro

LV_LOG_USER

#define LV_LOG_USER(...) \
    lv_log_add(LV_LOG_LEVEL_USER, LV_LOG_FILE, LV_LOG_LINE, __func__, __VA_ARGS__)

misc/lv_log.h:139macro

LV_LOG

#define LV_LOG(...) \
    lv_log(__VA_ARGS__)

Dependencies

Indirect dependencies

lv_conf_kconfig.h