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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/802_15_4/api/SysAL/sys_task_scheduler.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/802_15_4/api/SysAL/sys_task_scheduler.h
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+/**
+ * Copyright (c) 2016 - 2018 Nordic Semiconductor ASA and Luxoft Global Operations Gmbh.
+ * 
+ * All Rights Reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+#ifndef SYS_TASK_SCHEDULER_H_INCLUDED
+#define SYS_TASK_SCHEDULER_H_INCLUDED
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "sys_utils.h"
+#include "hal_atomic.h"
+#include "sys_events.h"
+
+/** @file
+ * @defgroup sys_task_scheduler Task scheduler
+ * @ingroup sys_15_4
+ * @{
+ * @brief Module for task scheduling.
+ */
+
+/**@brief Identificators for registered handlers.
+ *
+ * Handlers will be called from the task scheduler.
+ */
+typedef enum
+{
+    PHY_TASK_ID,
+    HAL_TASK_ID,
+#if (CONFIG_HIGHEST_LAYER_PHY == 0)
+    MAC_TASK_ID,
+#endif
+    APP_TASK_ID,
+    SYS_TASK_ID,
+    SYS_TASKS_AMOUNT
+} sys_task_ids_t;
+
+/**@brief Prototype of a task handler.
+ *
+ * @details Handler which will be called by the scheduler.
+ */
+typedef void (* sys_task_handler_t)(void);
+
+/**@brief Pending tasks.
+ *
+ * @details Variable which includes markers of pending tasks.
+ */
+extern volatile uint_fast16_t g_tasks;
+
+/**@brief       Notify task scheduler to add a task for execution.
+ *
+ * @details     The function sets a marker for the task for execution.
+ *              The task handler implements a tree architecture.
+ *              Task handler of each layer includes handlers of the layer's components.
+ *
+ * @param[in]   task_id  Task identificator.
+ */
+static inline void sys_task_post(sys_task_ids_t task_id)
+{
+    atomic_t atomic = 0;
+
+    hal_atomic_start(&atomic);
+    g_tasks |= BIT(task_id);
+#if (CONFIG_USE_SYS_TASK_NOTIFIER == 1)
+    sys_event_post(SYS_EVENT_NEW_TASK, NULL);
+#endif
+    hal_atomic_end(&atomic);
+}
+
+/**@brief Returns true, if there are any event flags awaiting in the system scheduler.
+ */
+static inline bool sys_tasks_pending(void)
+{
+    return g_tasks != 0;
+}
+
+/**@brief Handle tasks in the main function.
+ *
+ * @details   Handle tasks in the main function.
+ */
+void sys_task_run(void);
+
+/** @} */
+
+#endif // SYS_TASK_SCHEDULER_H_INCLUDED