[修改] 增加freeRTOS

1. 版本FreeRTOSv202212.01，命名为kernel；

kernel/FreeRTOS-Plus/Source/Utilities/logging/logging_levels.h

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+/*
+ * FreeRTOS V202212.01
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://aws.amazon.com/freertos
+ *
+ */
+
+/**
+ * @file logging_levels.h
+ * @brief Defines the configuration constants for all logging verbosity levels.
+ */
+
+#ifndef LOGGING_LEVELS_H
+#define LOGGING_LEVELS_H
+
+/**
+ * @constantspage{logging,logging library}
+ *
+ * @section logging_constants_levels Log levels
+ * @brief Log levels for the libraries in this SDK.
+ *
+ * Each library should specify a log level by setting @ref LIBRARY_LOG_LEVEL.
+ * All log messages with a level at or below the specified level will be printed
+ * for that library.
+ *
+ * Currently, there are 4 log levels. In the order of lowest to highest, they are:
+ * - #LOG_NONE <br>
+ *   @copybrief LOG_NONE
+ * - #LOG_ERROR <br>
+ *   @copybrief LOG_ERROR
+ * - #LOG_WARN <br>
+ *   @copybrief LOG_WARN
+ * - #LOG_INFO <br>
+ *   @copybrief LOG_INFO
+ * - #LOG_DEBUG <br>
+ *   @copybrief LOG_DEBUG
+ */
+
+/**
+ * @brief No log messages.
+ *
+ * When @ref LIBRARY_LOG_LEVEL is #LOG_NONE, logging is disabled and no
+ * logging messages are printed.
+ */
+#define LOG_NONE     0
+
+/**
+ * @brief Represents erroneous application state or event.
+ *
+ * These messages describe the situations when a library encounters an error from
+ * which it cannot recover.
+ *
+ * These messages are printed when @ref LIBRARY_LOG_LEVEL is defined as either
+ * of #LOG_ERROR, #LOG_WARN, #LOG_INFO or #LOG_DEBUG.
+ */
+#define LOG_ERROR    1
+
+/**
+ * @brief Message about an abnormal event.
+ *
+ * These messages describe the situations when a library encounters
+ * abnormal event that may be indicative of an error. Libraries continue
+ * execution after logging a warning.
+ *
+ * These messages are printed when @ref LIBRARY_LOG_LEVEL is defined as either
+ * of #LOG_WARN, #LOG_INFO or #LOG_DEBUG.
+ */
+#define LOG_WARN     2
+
+/**
+ * @brief A helpful, informational message.
+ *
+ * These messages describe normal execution of a library. They provide
+ * the progress of the program at a coarse-grained level.
+ *
+ * These messages are printed when @ref LIBRARY_LOG_LEVEL is defined as either
+ * of #LOG_INFO or #LOG_DEBUG.
+ */
+#define LOG_INFO     3
+
+/**
+ * @brief Detailed and excessive debug information.
+ *
+ * Debug log messages are used to provide the
+ * progress of the program at a fine-grained level. These are mostly used
+ * for debugging and may contain excessive information such as internal
+ * variables, buffers, or other specific information.
+ *
+ * These messages are only printed when @ref LIBRARY_LOG_LEVEL is defined as
+ * #LOG_DEBUG.
+ */
+#define LOG_DEBUG    4
+
+#endif /* ifndef LOGGING_LEVELS_H */