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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/experimental_log/nrf_log_backend_flash.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/experimental_log/nrf_log_backend_flash.h
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+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/experimental_log/nrf_log_backend_flash.h
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+/**
+ * Copyright (c) 2018 - 2018, Nordic Semiconductor ASA
+ * 
+ * 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.
+ * 
+ */
+
+ /**@file
+ *
+ * @defgroup nrf_log_backend_flash Flash logger backend
+ * @{
+ * @ingroup  nrf_log
+ * @brief Flash logger backend.
+ */
+
+#ifndef NRF_LOG_BACKEND_FLASH_H
+#define NRF_LOG_BACKEND_FLASH_H
+
+#include "nrf_log_backend_interface.h"
+#include "nrf_fstorage.h"
+#include "nrf_log_internal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @brief Flashlog logger backend API. */
+extern const nrf_log_backend_api_t nrf_log_backend_flashlog_api;
+
+/** @brief Crashlog logger backend API. */
+extern const nrf_log_backend_api_t nrf_log_backend_crashlog_api;
+
+/** @brief Flashlog logger backend structure. */
+typedef struct {
+    nrf_log_backend_t      backend;
+} nrf_log_backend_flashlog_t;
+
+/** @brief Crashlog logger backend structure. */
+typedef struct {
+    nrf_log_backend_t      backend;
+} nrf_log_backend_crashlog_t;
+
+/** @brief Macro for creating an instance of the flashlog logger backend. */
+#define NRF_LOG_BACKEND_FLASHLOG_DEF(name)                   \
+    static nrf_log_backend_flashlog_t name = {               \
+        .backend = {.p_api = &nrf_log_backend_flashlog_api}, \
+    }
+
+/** @brief Macro for creating an instance of the crashlog logger backend. */
+#define NRF_LOG_BACKEND_CRASHLOG_DEF(name)                   \
+    static nrf_log_backend_crashlog_t name = {               \
+        .backend = {.p_api = &nrf_log_backend_crashlog_api}, \
+    }
+
+/**
+ * @brief Function for initializing the flash logger backend.
+ *
+ * Flash logger backend consists of two logical backends: flashlog and crashlog. Since both
+ * backends write to the same flash area, the initialization is common.
+ *
+ * @param p_fs_api fstorage API to be used.
+ *
+ * @return NRF_SUCCESS or error code returned by @ref nrf_fstorage_init.
+ */
+ret_code_t nrf_log_backend_flash_init(nrf_fstorage_api_t const * p_fs_api);
+
+/**
+ * @brief Function for getting a log entry stored in flash.
+ *
+ * Log messages stored in flash can be read one by one starting from the oldest one.
+ *
+ * @param[in, out] p_token   Token reused between consecutive readings of log entries.
+ *                           Token must be set to 0 to read the first entry.
+ * @param[out]     pp_header Pointer to the entry header.
+ * @param[out]     pp_data   Pointer to the data part of the entry (arguments or data in case of hexdump).
+ *
+ * @retval NRF_SUCCESS             Entry was successfully read.
+ * @retval NRF_ERROR_NOT_SUPPORTED fstorage API does not support direct reading.
+ * @retval NRF_ERROR_NOT_FOUND     Entry not found. Last entry was already reached or area is empty.
+ */
+ret_code_t nrf_log_backend_flash_next_entry_get(uint32_t *          p_token,
+                                               nrf_log_header_t * * pp_header,
+                                               uint8_t * *          pp_data);
+
+/**
+ * @brief Function for erasing flash area dedicated for the flash logger backend.
+ */
+ret_code_t nrf_log_backend_flash_erase(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //NRF_LOG_BACKEND_UART_H
+
+/** @} */