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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/802_15_4/api/RAL/nrf52_soc/ral_fsm.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/802_15_4/api/RAL/nrf52_soc/ral_fsm.h
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+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/802_15_4/api/RAL/nrf52_soc/ral_fsm.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 RAL_FSM_H_INCLUDED
+#define RAL_FSM_H_INCLUDED
+
+#include "sys_fsm.h"
+
+/**
+ * @defgroup ral_api_fsm RAL FSM API
+ * @ingroup ral_api
+ * @{
+ */
+
+// list of possible events
+typedef enum
+{
+    E_RESET,
+    E_TRX_END,      /**< Radio signals that TX or RX is complete.*/
+    E_TX_REQ,       /**< Initiates upload of a frame into radio memory and
+                         transmission of it into air.*/
+    E_TRX_OFF,
+    E_TX_ON,
+    E_FORCE_TX_ON,
+    E_RX_ON,
+} ral_fsm_events_t;
+
+// states
+typedef enum
+{
+/* State symbol for short FSM debug mode */
+/* I */    S_TRX_OFF,
+/* J */    S_TX_ON,
+/*   */    S_BUSY_TX,
+/* G */    S_RX_ON,
+/* B */    S_BUSY_RX,
+} ral_fsm_states_t;
+
+/**@brief  Reads current state of RAL state machine.
+ *
+ * @return Current state.
+ */
+ral_fsm_states_t ral_fsm_current_state_get(void);
+
+/**@brief  Initializes finite state machine of radio chip.*/
+void ral_fsm_init(void);
+
+/**@brief  Sends new event to radio FSM. This function is used for
+ * changing radio state.
+ *
+ * @param event - event id for FSM.
+ * @param p_data - pointer to event specific data (expects pointer to ral_mem_t).
+ */
+void ral_fsm_event_post(ral_fsm_events_t event, void * p_data);
+
+/** @} */
+
+#endif /* RAL_FSM_H_INCLUDED */