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diff --git a/drivers_nrf/app_util_platform.h b/drivers_nrf/app_util_platform.h
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+/**
+ * Copyright (c) 2014 - 2017, 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 app_util_platform Utility Functions and Definitions (Platform)
+ * @{
+ * @ingroup app_common
+ *
+ * @brief Various types and definitions available to all applications when using SoftDevice.
+ */
+
+#ifndef APP_UTIL_PLATFORM_H__
+#define APP_UTIL_PLATFORM_H__
+
+#include <stdint.h>
+#include "compiler_abstraction.h"
+#include "nrf.h"
+#ifdef SOFTDEVICE_PRESENT
+#include "nrf_soc.h"
+#include "nrf_nvic.h"
+#endif
+#include "nrf_assert.h"
+#include "app_error.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if __CORTEX_M == (0x00U)
+#define _PRIO_SD_HIGH       0
+#define _PRIO_APP_HIGH      1
+#define _PRIO_APP_MID       1
+#define _PRIO_SD_LOW        2
+#define _PRIO_APP_LOW       3
+#define _PRIO_APP_LOWEST    3
+#define _PRIO_THREAD        4
+#elif __CORTEX_M == (0x04U) && !defined(S1XX)
+#define _PRIO_SD_HIGH       0
+#define _PRIO_SD_MID        1
+#define _PRIO_APP_HIGH      2
+#define _PRIO_APP_MID       3
+#define _PRIO_SD_LOW        4
+#define _PRIO_SD_LOWEST     5
+#define _PRIO_APP_LOW       6
+#define _PRIO_APP_LOWEST    7
+#define _PRIO_THREAD        15
+#elif defined(S1XX)
+#define _PRIO_SD_HIGH       0
+#define _PRIO_APP_HIGH      1
+#define _PRIO_APP_MID       1
+#define _PRIO_SD_LOW        2
+#define _PRIO_APP_LOW       3
+#define _PRIO_APP_LOWEST    3
+#define _PRIO_THREAD        4
+#else
+    #error "No platform defined"
+#endif
+
+
+//lint -save -e113 -e452
+/**@brief The interrupt priorities available to the application while the SoftDevice is active. */
+typedef enum
+{
+#ifndef SOFTDEVICE_PRESENT
+    APP_IRQ_PRIORITY_HIGHEST = _PRIO_SD_HIGH,
+#else
+    APP_IRQ_PRIORITY_HIGHEST = _PRIO_APP_HIGH,
+#endif
+    APP_IRQ_PRIORITY_HIGH    = _PRIO_APP_HIGH,
+#ifndef SOFTDEVICE_PRESENT
+    APP_IRQ_PRIORITY_MID     = _PRIO_SD_LOW,
+#else
+    APP_IRQ_PRIORITY_MID     = _PRIO_APP_MID,
+#endif
+    APP_IRQ_PRIORITY_LOW     = _PRIO_APP_LOW,
+    APP_IRQ_PRIORITY_LOWEST  = _PRIO_APP_LOWEST,
+    APP_IRQ_PRIORITY_THREAD  = _PRIO_THREAD     /**< "Interrupt level" when running in Thread Mode. */
+} app_irq_priority_t;
+//lint -restore
+
+
+/*@brief The privilege levels available to applications in Thread Mode */
+typedef enum
+{
+    APP_LEVEL_UNPRIVILEGED,
+    APP_LEVEL_PRIVILEGED
+} app_level_t;
+
+/**@cond NO_DOXYGEN */
+#define EXTERNAL_INT_VECTOR_OFFSET 16
+/**@endcond */
+
+/**@brief Macro for setting a breakpoint.
+ */
+#if defined(__GNUC__)
+#define NRF_BREAKPOINT __builtin_trap()
+#else
+#define NRF_BREAKPOINT __BKPT(0)
+#endif
+
+/** @brief Macro for setting a breakpoint.
+ *
+ * If it is possible to detect debugger presence then it is set only in that case.
+ *
+ */
+#if __CORTEX_M == 0x04
+#define NRF_BREAKPOINT_COND do {                            \
+    /* C_DEBUGEN == 1 -> Debugger Connected */              \
+    if (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk)   \
+    {                                                       \
+       /* Generate breakpoint if debugger is connected */   \
+            NRF_BREAKPOINT;                                 \
+    } \
+    }while (0)
+#else
+#define NRF_BREAKPOINT_COND NRF_BREAKPOINT
+#endif // __CORTEX_M == 0x04
+
+#if defined ( __CC_ARM )
+#define PACKED(TYPE) __packed TYPE
+#define PACKED_STRUCT PACKED(struct)
+#elif defined   ( __GNUC__ )
+#define PACKED __attribute__((packed))
+#define PACKED_STRUCT struct PACKED
+#elif defined (__ICCARM__)
+#define PACKED_STRUCT __packed struct
+#endif
+
+void app_util_critical_region_enter (uint8_t *p_nested);
+void app_util_critical_region_exit (uint8_t nested);
+
+/**@brief Macro for entering a critical region.
+ *
+ * @note Due to implementation details, there must exist one and only one call to
+ *       CRITICAL_REGION_EXIT() for each call to CRITICAL_REGION_ENTER(), and they must be located
+ *       in the same scope.
+ */
+#ifdef SOFTDEVICE_PRESENT
+#define CRITICAL_REGION_ENTER()                                                             \
+    {                                                                                       \
+        uint8_t __CR_NESTED = 0;                                                            \
+        app_util_critical_region_enter(&__CR_NESTED);
+#else
+#define CRITICAL_REGION_ENTER() app_util_critical_region_enter(NULL)
+#endif
+
+/**@brief Macro for leaving a critical region.
+ *
+ * @note Due to implementation details, there must exist one and only one call to
+ *       CRITICAL_REGION_EXIT() for each call to CRITICAL_REGION_ENTER(), and they must be located
+ *       in the same scope.
+ */
+#ifdef SOFTDEVICE_PRESENT
+#define CRITICAL_REGION_EXIT()                                                              \
+        app_util_critical_region_exit(__CR_NESTED);                                         \
+    }
+#else
+#define CRITICAL_REGION_EXIT() app_util_critical_region_exit(0)
+#endif
+
+/* Workaround for Keil 4 */
+#ifndef IPSR_ISR_Msk
+#define IPSR_ISR_Msk                       (0x1FFUL /*<< IPSR_ISR_Pos*/)                  /*!< IPSR: ISR Mask */
+#endif
+
+
+
+/**@brief Macro to enable anonymous unions from a certain point in the code.
+ */
+#if defined(__CC_ARM)
+    #define ANON_UNIONS_ENABLE _Pragma("push") \
+                               _Pragma("anon_unions")
+#elif defined(__ICCARM__)
+    #define ANON_UNIONS_ENABLE _Pragma("language=extended")
+#else
+    #define ANON_UNIONS_ENABLE
+    // No action will be taken.
+    // For GCC anonymous unions are enabled by default.
+#endif
+
+/**@brief Macro to disable anonymous unions from a certain point in the code.
+ * @note Call only after first calling @ref ANON_UNIONS_ENABLE.
+ */
+#if defined(__CC_ARM)
+    #define ANON_UNIONS_DISABLE _Pragma("pop")
+#elif defined(__ICCARM__)
+    #define ANON_UNIONS_DISABLE
+    // for IAR leave anonymous unions enabled
+#else
+    #define ANON_UNIONS_DISABLE
+    // No action will be taken.
+    // For GCC anonymous unions are enabled by default.
+#endif
+
+/**@brief Macro for adding pragma directive only for GCC.
+ */
+#ifdef __GNUC__
+#define GCC_PRAGMA(v)            _Pragma(v)
+#else
+#define GCC_PRAGMA(v)
+#endif
+
+/* Workaround for Keil 4 */
+#ifndef CONTROL_nPRIV_Msk
+#define CONTROL_nPRIV_Msk                  (1UL /*<< CONTROL_nPRIV_Pos*/)                 /*!< CONTROL: nPRIV Mask */
+#endif
+
+/**@brief Function for finding the current interrupt level.
+ *
+ * @return   Current interrupt level.
+ * @retval   APP_IRQ_PRIORITY_HIGH    We are running in Application High interrupt level.
+ * @retval   APP_IRQ_PRIORITY_LOW     We are running in Application Low interrupt level.
+ * @retval   APP_IRQ_PRIORITY_THREAD  We are running in Thread Mode.
+ */
+uint8_t current_int_priority_get(void);
+
+
+/**@brief Function for finding out the current privilege level.
+ *
+ * @return   Current privilege level.
+ * @retval   APP_LEVEL_UNPRIVILEGED    We are running in unprivileged level.
+ * @retval   APP_LEVEL_PRIVILEGED    We are running in privileged level.
+ */
+uint8_t privilege_level_get(void);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // APP_UTIL_PLATFORM_H__
+
+/** @} */