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diff --git a/src/common/compiler/tusb_compiler_iar.h b/src/common/compiler/tusb_compiler_iar.h
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+/**************************************************************************/
+/*!
+    @file     compiler_iar.h
+    @author   hathach (tinyusb.org)
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2013, hathach (tinyusb.org)
+    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 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 the copyright holders nor the
+    names of its contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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.
+
+    This file is part of the tinyusb stack.
+*/
+/**************************************************************************/
+
+/** \file
+ *  \brief IAR Compiler
+ */
+
+/** \ingroup Group_Compiler
+ *  \defgroup Group_IAR IAR ARM
+ *  @{
+ */
+
+#ifndef _TUSB_COMPILER_IAR_H_
+#define _TUSB_COMPILER_IAR_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#define ALIGN_OF(x)     __ALIGNOF__(x)
+
+#define ATTR_PACKED_STRUCT(x)     __packed x
+#define ATTR_PREPACKED  __packed
+#define ATTR_PACKED
+//#define ATTR_SECTION(section)      _Pragma((#section))
+
+#define ATTR_ALIGNED(bytes)        _Pragma(XSTRING_(data_alignment=##bytes))
+
+#ifndef ATTR_ALWAYS_INLINE
+/// Generally, functions are not inlined unless optimization is specified. For functions declared inline, this attribute inlines the function even if no optimization level is specified
+#define ATTR_ALWAYS_INLINE         error
+#endif
+
+#define ATTR_PURE   // TODO IAR pure function attribute
+#define ATTR_CONST  // TODO IAR const function attribute
+#define ATTR_WEAK                 __weak
+
+#define ATTR_WARN_UNUSED_RESULT
+#define ATTR_USED
+#define ATTR_UNUSED
+
+// built-in function to convert 32-bit Big-Endian to Little-Endian
+//#if __LITTLE_ENDIAN__
+#define __be2n   __REV
+#define __n2be   __be2n
+
+#define __n2be_16(u16)  ((uint16_t) __REV16(u16))
+#define __be2n_16(u16)  __n2be_16(u16)
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* _TUSB_COMPILER_IAR_H_ */
+
+/** @} */