arduino-esp32/tools/sdk/include/log/esp_log.h

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2016-10-06 13:21:30 +02:00
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef __ESP_LOG_H__
#define __ESP_LOG_H__
#include <stdint.h>
#include <stdarg.h>
#include "sdkconfig.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Logging library
*
* Log library has two ways of managing log verbosity: compile time, set via
* menuconfig, and runtime, using esp_log_set_level function.
*
* At compile time, filtering is done using CONFIG_LOG_DEFAULT_LEVEL macro, set via
* menuconfig. All logging statments for levels higher than CONFIG_LOG_DEFAULT_LEVEL
* will be removed by the preprocessor.
*
* At run time, all logs below CONFIG_LOG_DEFAULT_LEVEL are enabled by default.
* esp_log_set_level function may be used to set logging level per module.
* Modules are identified by their tags, which are human-readable ASCII
* zero-terminated strings.
*
* How to use this library:
*
* In each C file which uses logging functionality, define TAG variable like this:
*
* static const char* TAG = "MyModule";
*
* then use one of logging macros to produce output, e.g:
*
* ESP_LOGW(TAG, "Baud rate error %.1f%%. Requested: %d baud, actual: %d baud", error * 100, baud_req, baud_real);
*
* Several macros are available for different verbosity levels:
*
* ESP_LOGE error
* ESP_LOGW warning
* ESP_LOGI info
* ESP_LOGD - debug
* ESP_LOGV - verbose
*
* Additionally there is an _EARLY_ variant for each of these macros (e.g. ESP_EARLY_LOGE).
* These variants can run in startup code, before heap allocator and syscalls
* have been initialized.
* When compiling bootloader, normal ESP_LOGx macros fall back to the same implementation
* as ESP_EARLY_LOGx macros. So the only place where ESP_EARLY_LOGx have to be used explicitly
* is the early startup code, such as heap allocator initialization code.
*
* (Note that such distinction would not have been necessary if we would have an
* ets_vprintf function in the ROM. Then it would be possible to switch implementation
* from _EARLY version to normal version on the fly. Unfortunately, ets_vprintf in ROM
* has been inlined by the compiler into ets_printf, so it is not accessible outside.)
*
* To override default verbosity level at file or component scope, define LOG_LOCAL_LEVEL macro.
* At file scope, define it before including esp_log.h, e.g.:
*
* #define LOG_LOCAL_LEVEL ESP_LOG_VERBOSE
* #include "esp_log.h"
*
* At component scope, define it in component makefile:
*
* CFLAGS += -D LOG_LOCAL_LEVEL=ESP_LOG_DEBUG
*
* To configure logging output per module at runtime, add calls to esp_log_set_level function:
*
* esp_log_set_level("*", ESP_LOG_ERROR); // set all components to ERROR level
* esp_log_set_level("wifi", ESP_LOG_WARN); // enable WARN logs from WiFi stack
* esp_log_set_level("dhcpc", ESP_LOG_INFO); // enable INFO logs from DHCP client
*
*/
typedef enum {
ESP_LOG_NONE, // No log output
ESP_LOG_ERROR, // Critical errors, software module can not recover on its own
ESP_LOG_WARN, // Error conditions from which recovery measures have been taken
ESP_LOG_INFO, // Information messages which describe normal flow of events
ESP_LOG_DEBUG, // Extra information which is not necessary for normal use (values, pointers, sizes, etc).
ESP_LOG_VERBOSE // Bigger chunks of debugging information, or frequent messages which can potentially flood the output.
} esp_log_level_t;
typedef int (*vprintf_like_t)(const char *, va_list);
/**
* @brief Set log level for given tag
*
* If logging for given component has already been enabled, changes previous setting.
*
* @param tag Tag of the log entries to enable. Must be a non-NULL zero terminated string.
* Value "*" resets log level for all tags to the given value.
*
* @param level Selects log level to enable. Only logs at this and lower levels will be shown.
*/
void esp_log_level_set(const char* tag, esp_log_level_t level);
/**
* @brief Set function used to output log entries
*
* By default, log output goes to UART0. This function can be used to redirect log
* output to some other destination, such as file or network.
*
* @param func Function used for output. Must have same signature as vprintf.
*/
void esp_log_set_vprintf(vprintf_like_t func);
/**
* @brief Write message into the log
*
* This function is not intended to be used directly. Instead, use one of
* ESP_LOGE, ESP_LOGW, ESP_LOGI, ESP_LOGD, ESP_LOGV macros.
*
* This function or these macros should not be used from an interrupt.
*/
void esp_log_write(esp_log_level_t level, const char* tag, const char* format, ...) __attribute__ ((format (printf, 3, 4)));
/**
* @brief Function which returns timestamp to be used in log output
*
* This function is used in expansion of ESP_LOGx macros.
* In the 2nd stage bootloader, and at early application startup stage
* this function uses CPU cycle counter as time source. Later when
* FreeRTOS scheduler start running, it switches to FreeRTOS tick count.
*
* For now, we ignore millisecond counter overflow.
*
* @return timestamp, in milliseconds
*/
uint32_t esp_log_timestamp();
#if CONFIG_LOG_COLORS
#define LOG_COLOR_BLACK "30"
#define LOG_COLOR_RED "31"
#define LOG_COLOR_GREEN "32"
#define LOG_COLOR_BROWN "33"
#define LOG_COLOR_BLUE "34"
#define LOG_COLOR_PURPLE "35"
#define LOG_COLOR_CYAN "36"
#define LOG_COLOR(COLOR) "\033[0;" COLOR "m"
#define LOG_BOLD(COLOR) "\033[1;" COLOR "m"
#define LOG_RESET_COLOR "\033[0m"
#define LOG_COLOR_E LOG_COLOR(LOG_COLOR_RED)
#define LOG_COLOR_W LOG_COLOR(LOG_COLOR_BROWN)
#define LOG_COLOR_I LOG_COLOR(LOG_COLOR_GREEN)
#define LOG_COLOR_D
#define LOG_COLOR_V
#else //CONFIG_LOG_COLORS
#define LOG_COLOR_E
#define LOG_COLOR_W
#define LOG_COLOR_I
#define LOG_COLOR_D
#define LOG_COLOR_V
#define LOG_RESET_COLOR
#endif //CONFIG_LOG_COLORS
#define LOG_FORMAT(letter, format) LOG_COLOR_ ## letter #letter " (%d) %s: " format LOG_RESET_COLOR "\n"
#ifndef LOG_LOCAL_LEVEL
#ifndef BOOTLOADER_BUILD
#define LOG_LOCAL_LEVEL ((esp_log_level_t) CONFIG_LOG_DEFAULT_LEVEL)
#else
#define LOG_LOCAL_LEVEL ((esp_log_level_t) CONFIG_LOG_BOOTLOADER_LEVEL)
#endif
#endif
#define ESP_EARLY_LOGE( tag, format, ... ) if (LOG_LOCAL_LEVEL >= ESP_LOG_ERROR) { ets_printf(LOG_FORMAT(E, format), esp_log_timestamp(), tag, ##__VA_ARGS__); }
#define ESP_EARLY_LOGW( tag, format, ... ) if (LOG_LOCAL_LEVEL >= ESP_LOG_WARN) { ets_printf(LOG_FORMAT(W, format), esp_log_timestamp(), tag, ##__VA_ARGS__); }
#define ESP_EARLY_LOGI( tag, format, ... ) if (LOG_LOCAL_LEVEL >= ESP_LOG_INFO) { ets_printf(LOG_FORMAT(I, format), esp_log_timestamp(), tag, ##__VA_ARGS__); }
#define ESP_EARLY_LOGD( tag, format, ... ) if (LOG_LOCAL_LEVEL >= ESP_LOG_DEBUG) { ets_printf(LOG_FORMAT(D, format), esp_log_timestamp(), tag, ##__VA_ARGS__); }
#define ESP_EARLY_LOGV( tag, format, ... ) if (LOG_LOCAL_LEVEL >= ESP_LOG_VERBOSE) { ets_printf(LOG_FORMAT(V, format), esp_log_timestamp(), tag, ##__VA_ARGS__); }
#ifndef BOOTLOADER_BUILD
#define ESP_LOGE( tag, format, ... ) if (LOG_LOCAL_LEVEL >= ESP_LOG_ERROR) { esp_log_write(ESP_LOG_ERROR, tag, LOG_FORMAT(E, format), esp_log_timestamp(), tag, ##__VA_ARGS__); }
#define ESP_LOGW( tag, format, ... ) if (LOG_LOCAL_LEVEL >= ESP_LOG_WARN) { esp_log_write(ESP_LOG_WARN, tag, LOG_FORMAT(W, format), esp_log_timestamp(), tag, ##__VA_ARGS__); }
#define ESP_LOGI( tag, format, ... ) if (LOG_LOCAL_LEVEL >= ESP_LOG_INFO) { esp_log_write(ESP_LOG_INFO, tag, LOG_FORMAT(I, format), esp_log_timestamp(), tag, ##__VA_ARGS__); }
#define ESP_LOGD( tag, format, ... ) if (LOG_LOCAL_LEVEL >= ESP_LOG_DEBUG) { esp_log_write(ESP_LOG_DEBUG, tag, LOG_FORMAT(D, format), esp_log_timestamp(), tag, ##__VA_ARGS__); }
#define ESP_LOGV( tag, format, ... ) if (LOG_LOCAL_LEVEL >= ESP_LOG_VERBOSE) { esp_log_write(ESP_LOG_VERBOSE, tag, LOG_FORMAT(V, format), esp_log_timestamp(), tag, ##__VA_ARGS__); }
#else
#define ESP_LOGE( tag, format, ... ) ESP_EARLY_LOGE(tag, format, ##__VA_ARGS__)
#define ESP_LOGW( tag, format, ... ) ESP_EARLY_LOGW(tag, format, ##__VA_ARGS__)
#define ESP_LOGI( tag, format, ... ) ESP_EARLY_LOGI(tag, format, ##__VA_ARGS__)
#define ESP_LOGD( tag, format, ... ) ESP_EARLY_LOGD(tag, format, ##__VA_ARGS__)
#define ESP_LOGV( tag, format, ... ) ESP_EARLY_LOGV(tag, format, ##__VA_ARGS__)
#endif // BOOTLOADER_BUILD
#ifdef __cplusplus
}
#endif
#endif /* __ESP_LOG_H__ */