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