diff options
Diffstat (limited to 'LUFA/Common')
| -rw-r--r-- | LUFA/Common/Architectures.h | 168 | ||||
| -rw-r--r-- | LUFA/Common/CompilerSpecific.h | 196 | ||||
| -rw-r--r-- | LUFA/Common/Endianness.h | 952 |
3 files changed, 658 insertions, 658 deletions
diff --git a/LUFA/Common/Architectures.h b/LUFA/Common/Architectures.h index 8dab72ae0..dad3ba7d7 100644 --- a/LUFA/Common/Architectures.h +++ b/LUFA/Common/Architectures.h @@ -1,84 +1,84 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2011.
-
- dean [at] fourwalledcubicle [dot] com
- www.lufa-lib.org
-*/
-
-/*
- Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
- all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaim all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** \file
- * \brief Supported library architecture defines.
- *
- * \copydetails Group_Architectures
- *
- * \note Do not include this file directly, rather include the Common.h header file instead to gain this file's
- * functionality.
- */
-
-/** \ingroup Group_Common
- * \defgroup Group_Architectures Hardware Architectures
- * \brief Supported library architecture defines.
- *
- * Architecture macros for selecting the desired target microcontroller architecture. One of these values should be
- * defined as the value of \c ARCH in the user project makefile via the \c -D compiler switch to GCC, to select the
- * target architecture.
- *
- * The selected architecture should remain consistent with the makefile \c ARCH value, which is used to select the
- * underlying driver source files for each architecture.
- *
- * @{
- */
-
-#ifndef __LUFA_ARCHITECTURES_H__
-#define __LUFA_ARCHITECTURES_H__
-
- /* Preprocessor Checks: */
- #if !defined(__INCLUDE_FROM_COMMON_H)
- #error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality.
- #endif
-
- /* Public Interface - May be used in end-application: */
- /* Macros: */
- /** Selects the Atmel 8-bit AVR (AT90USB* and ATMEGA*U* chips) architecture. */
- #define ARCH_AVR8 0
-
- /** Selects the Atmel 32-bit UC3 AVR (AT32UC3* chips) architecture. */
- #define ARCH_UC3 1
-
- /** Selects the Atmel XMEGA AVR (ATXMEGA*U chips) architecture. */
- #define ARCH_XMEGA 2
-
- #if !defined(__DOXYGEN__)
- #define ARCH_ ARCH_AVR8
-
- #if !defined(ARCH)
- #define ARCH ARCH_AVR8
- #endif
- #endif
-
-#endif
-
-/** @} */
-
+/* + LUFA Library + Copyright (C) Dean Camera, 2011. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + The author disclaim all warranties with regard to this + software, including all implied warranties of merchantability + and fitness. In no event shall the author be liable for any + special, indirect or consequential damages or any damages + whatsoever resulting from loss of use, data or profits, whether + in an action of contract, negligence or other tortious action, + arising out of or in connection with the use or performance of + this software. +*/ + +/** \file + * \brief Supported library architecture defines. + * + * \copydetails Group_Architectures + * + * \note Do not include this file directly, rather include the Common.h header file instead to gain this file's + * functionality. + */ + +/** \ingroup Group_Common + * \defgroup Group_Architectures Hardware Architectures + * \brief Supported library architecture defines. + * + * Architecture macros for selecting the desired target microcontroller architecture. One of these values should be + * defined as the value of \c ARCH in the user project makefile via the \c -D compiler switch to GCC, to select the + * target architecture. + * + * The selected architecture should remain consistent with the makefile \c ARCH value, which is used to select the + * underlying driver source files for each architecture. + * + * @{ + */ + +#ifndef __LUFA_ARCHITECTURES_H__ +#define __LUFA_ARCHITECTURES_H__ + + /* Preprocessor Checks: */ + #if !defined(__INCLUDE_FROM_COMMON_H) + #error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality. + #endif + + /* Public Interface - May be used in end-application: */ + /* Macros: */ + /** Selects the Atmel 8-bit AVR (AT90USB* and ATMEGA*U* chips) architecture. */ + #define ARCH_AVR8 0 + + /** Selects the Atmel 32-bit UC3 AVR (AT32UC3* chips) architecture. */ + #define ARCH_UC3 1 + + /** Selects the Atmel XMEGA AVR (ATXMEGA*U chips) architecture. */ + #define ARCH_XMEGA 2 + + #if !defined(__DOXYGEN__) + #define ARCH_ ARCH_AVR8 + + #if !defined(ARCH) + #define ARCH ARCH_AVR8 + #endif + #endif + +#endif + +/** @} */ + diff --git a/LUFA/Common/CompilerSpecific.h b/LUFA/Common/CompilerSpecific.h index 9dcd7637c..6b4826aa5 100644 --- a/LUFA/Common/CompilerSpecific.h +++ b/LUFA/Common/CompilerSpecific.h @@ -1,98 +1,98 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2011.
-
- dean [at] fourwalledcubicle [dot] com
- www.lufa-lib.org
-*/
-
-/*
- Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
- all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaim all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** \file
- * \brief Compiler specific macros for code optimization and correctness.
- *
- * \copydetails Group_CompilerSpecific
- *
- * \note Do not include this file directly, rather include the Common.h header file instead to gain this file's
- * functionality.
- */
-
-/** \ingroup Group_Common
- * \defgroup Group_CompilerSpecific Compiler Specific Macros
- * \brief Compiler specific macros for code optimization and correctness.
- *
- * Compiler specific macros to expose certain compiler features which may increase the level of code optimization
- * for a specific compiler, or correct certain issues that may be present such as memory barriers for use in conjunction
- * with atomic variable access.
- *
- * Where possible, on alternative compilers, these macros will either have no effect, or default to returning a sane value
- * so that they can be used in existing code without the need for extra compiler checks in the user application code.
- *
- * @{
- */
-
-#ifndef __LUFA_COMPILERSPEC_H__
-#define __LUFA_COMPILERSPEC_H__
-
- /* Preprocessor Checks: */
- #if !defined(__INCLUDE_FROM_COMMON_H)
- #error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality.
- #endif
-
- /* Public Interface - May be used in end-application: */
- /* Macros: */
- #if defined(__GNUC__) || defined(__DOXYGEN__)
- /** Forces GCC to use pointer indirection (via the device's pointer register pairs) when accessing the given
- * struct pointer. In some cases GCC will emit non-optimal assembly code when accessing a structure through
- * a pointer, resulting in a larger binary. When this macro is used on a (non \c const) structure pointer before
- * use, it will force GCC to use pointer indirection on the elements rather than direct store and load
- * instructions.
- *
- * \param[in, out] StructPtr Pointer to a structure which is to be forced into indirect access mode.
- */
- #define GCC_FORCE_POINTER_ACCESS(StructPtr) __asm__ __volatile__("" : "=b" (StructPtr) : "0" (StructPtr))
-
- /** Forces GCC to create a memory barrier, ensuring that memory accesses are not reordered past the barrier point.
- * This can be used before ordering-critical operations, to ensure that the compiler does not re-order the resulting
- * assembly output in an unexpected manner on sections of code that are ordering-specific.
- */
- #define GCC_MEMORY_BARRIER() __asm__ __volatile__("" ::: "memory");
-
- /** Evaluates to boolean true if the specified value can be determined at compile time to be a constant value
- * when compiling under GCC.
- *
- * \param[in] x Value to check compile time constantness of.
- *
- * \return Boolean true if the given value is known to be a compile time constant.
- */
- #define GCC_IS_COMPILE_CONST(x) __builtin_constant_p(x)
- #else
- #define GCC_FORCE_POINTER_ACCESS(StructPtr)
- #define GCC_MEMORY_BARRIER()
- #define GCC_IS_COMPILE_CONST(x) 0
- #endif
-
-#endif
-
-/** @} */
-
+/* + LUFA Library + Copyright (C) Dean Camera, 2011. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + The author disclaim all warranties with regard to this + software, including all implied warranties of merchantability + and fitness. In no event shall the author be liable for any + special, indirect or consequential damages or any damages + whatsoever resulting from loss of use, data or profits, whether + in an action of contract, negligence or other tortious action, + arising out of or in connection with the use or performance of + this software. +*/ + +/** \file + * \brief Compiler specific macros for code optimization and correctness. + * + * \copydetails Group_CompilerSpecific + * + * \note Do not include this file directly, rather include the Common.h header file instead to gain this file's + * functionality. + */ + +/** \ingroup Group_Common + * \defgroup Group_CompilerSpecific Compiler Specific Macros + * \brief Compiler specific macros for code optimization and correctness. + * + * Compiler specific macros to expose certain compiler features which may increase the level of code optimization + * for a specific compiler, or correct certain issues that may be present such as memory barriers for use in conjunction + * with atomic variable access. + * + * Where possible, on alternative compilers, these macros will either have no effect, or default to returning a sane value + * so that they can be used in existing code without the need for extra compiler checks in the user application code. + * + * @{ + */ + +#ifndef __LUFA_COMPILERSPEC_H__ +#define __LUFA_COMPILERSPEC_H__ + + /* Preprocessor Checks: */ + #if !defined(__INCLUDE_FROM_COMMON_H) + #error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality. + #endif + + /* Public Interface - May be used in end-application: */ + /* Macros: */ + #if defined(__GNUC__) || defined(__DOXYGEN__) + /** Forces GCC to use pointer indirection (via the device's pointer register pairs) when accessing the given + * struct pointer. In some cases GCC will emit non-optimal assembly code when accessing a structure through + * a pointer, resulting in a larger binary. When this macro is used on a (non \c const) structure pointer before + * use, it will force GCC to use pointer indirection on the elements rather than direct store and load + * instructions. + * + * \param[in, out] StructPtr Pointer to a structure which is to be forced into indirect access mode. + */ + #define GCC_FORCE_POINTER_ACCESS(StructPtr) __asm__ __volatile__("" : "=b" (StructPtr) : "0" (StructPtr)) + + /** Forces GCC to create a memory barrier, ensuring that memory accesses are not reordered past the barrier point. + * This can be used before ordering-critical operations, to ensure that the compiler does not re-order the resulting + * assembly output in an unexpected manner on sections of code that are ordering-specific. + */ + #define GCC_MEMORY_BARRIER() __asm__ __volatile__("" ::: "memory"); + + /** Evaluates to boolean true if the specified value can be determined at compile time to be a constant value + * when compiling under GCC. + * + * \param[in] x Value to check compile time constantness of. + * + * \return Boolean true if the given value is known to be a compile time constant. + */ + #define GCC_IS_COMPILE_CONST(x) __builtin_constant_p(x) + #else + #define GCC_FORCE_POINTER_ACCESS(StructPtr) + #define GCC_MEMORY_BARRIER() + #define GCC_IS_COMPILE_CONST(x) 0 + #endif + +#endif + +/** @} */ + diff --git a/LUFA/Common/Endianness.h b/LUFA/Common/Endianness.h index 58f8012c1..123ad425f 100644 --- a/LUFA/Common/Endianness.h +++ b/LUFA/Common/Endianness.h @@ -1,476 +1,476 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2011.
-
- dean [at] fourwalledcubicle [dot] com
- www.lufa-lib.org
-*/
-
-/*
- Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
- all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaim all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** \file
- * \brief Endianness and Byte Ordering macros and functions.
- *
- * \copydetails Group_Endianness
- */
-
-/** \ingroup Group_Endianness
- * \defgroup Group_ByteSwapping Byte Reordering
- * \brief Macros and functions for forced byte reordering.
- */
-
-/** \ingroup Group_Endianness
- * \defgroup Group_EndianConversion Endianness Conversion
- * \brief Macros and functions for automatic endianness conversion.
- */
-
-/** \ingroup Group_Common
- * \defgroup Group_Endianness Endianness and Byte Ordering
- * \brief Convenience macros and functions relating to byte (re-)ordering
- *
- * Common library convenience macros and functions relating to byte (re-)ordering.
- *
- * @{
- */
-
-#ifndef __LUFA_ENDIANNESS_H__
-#define __LUFA_ENDIANNESS_H__
-
- /* Enable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
- /* Preprocessor Checks: */
- #if !defined(__INCLUDE_FROM_COMMON_H)
- #error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality.
- #endif
-
- #if !(defined(ARCH_BIG_ENDIAN) || defined(ARCH_LITTLE_ENDIAN))
- #error ARCH_BIG_ENDIAN or ARCH_LITTLE_ENDIAN not set for the specified architecture.
- #endif
-
- /* Public Interface - May be used in end-application: */
- /* Macros: */
- /** Swaps the byte ordering of a 16-bit value at compile-time. Do not use this macro for swapping byte orderings
- * of dynamic values computed at runtime, use \ref SwapEndian_16() instead. The result of this macro can be used
- * inside struct or other variable initializers outside of a function, something that is not possible with the
- * inline function variant.
- *
- * \ingroup Group_ByteSwapping
- *
- * \param[in] x 16-bit value whose byte ordering is to be swapped.
- *
- * \return Input value with the byte ordering reversed.
- */
- #define SWAPENDIAN_16(x) (uint16_t)((((x) & 0xFF00) >> 8) | (((x) & 0x00FF) << 8))
-
- /** Swaps the byte ordering of a 32-bit value at compile-time. Do not use this macro for swapping byte orderings
- * of dynamic values computed at runtime- use \ref SwapEndian_32() instead. The result of this macro can be used
- * inside struct or other variable initializers outside of a function, something that is not possible with the
- * inline function variant.
- *
- * \ingroup Group_ByteSwapping
- *
- * \param[in] x 32-bit value whose byte ordering is to be swapped.
- *
- * \return Input value with the byte ordering reversed.
- */
- #define SWAPENDIAN_32(x) (uint32_t)((((x) & 0xFF000000UL) >> 24UL) | (((x) & 0x00FF0000UL) >> 8UL) | \
- (((x) & 0x0000FF00UL) << 8UL) | (((x) & 0x000000FFUL) << 24UL))
-
- #if defined(ARCH_BIG_ENDIAN) && !defined(le16_to_cpu)
- #define le16_to_cpu(x) SwapEndian_16(x)
- #define le32_to_cpu(x) SwapEndian_32(x)
- #define be16_to_cpu(x) x
- #define be32_to_cpu(x) x
- #define cpu_to_le16(x) SwapEndian_16(x)
- #define cpu_to_le32(x) SwapEndian_32(x)
- #define cpu_to_be16(x) x
- #define cpu_to_be32(x) x
- #define LE16_TO_CPU(x) SWAPENDIAN_16(x)
- #define LE32_TO_CPU(x) SWAPENDIAN_32(x)
- #define BE16_TO_CPU(x) x
- #define BE32_TO_CPU(x) x
- #define CPU_TO_LE16(x) SWAPENDIAN_16(x)
- #define CPU_TO_LE32(x) SWAPENDIAN_32(x)
- #define CPU_TO_BE16(x) x
- #define CPU_TO_BE32(x) x
- #elif !defined(le16_to_cpu)
- /** \name Run-time endianness conversion */
- //@{
-
- /** Performs a conversion between a Little Endian encoded 16-bit piece of data and the
- * Endianness of the currently selected CPU architecture.
- *
- * On little endian architectures, this macro does nothing.
- *
- * \note This macro is designed for run-time conversion of data - for compile-time endianness
- * conversion, use \ref LE16_TO_CPU instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define le16_to_cpu(x) x
-
- /** Performs a conversion between a Little Endian encoded 32-bit piece of data and the
- * Endianness of the currently selected CPU architecture.
- *
- * On little endian architectures, this macro does nothing.
- *
- * \note This macro is designed for run-time conversion of data - for compile-time endianness
- * conversion, use \ref LE32_TO_CPU instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define le32_to_cpu(x) x
-
- /** Performs a conversion between a Big Endian encoded 16-bit piece of data and the
- * Endianness of the currently selected CPU architecture.
- *
- * On big endian architectures, this macro does nothing.
- *
- * \note This macro is designed for run-time conversion of data - for compile-time endianness
- * conversion, use \ref BE16_TO_CPU instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define be16_to_cpu(x) SwapEndian_16(x)
-
- /** Performs a conversion between a Big Endian encoded 32-bit piece of data and the
- * Endianness of the currently selected CPU architecture.
- *
- * On big endian architectures, this macro does nothing.
- *
- * \note This macro is designed for run-time conversion of data - for compile-time endianness
- * conversion, use \ref BE32_TO_CPU instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define be32_to_cpu(x) SwapEndian_32(x)
-
- /** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
- * is in Little Endian format regardless of the currently selected CPU architecture.
- *
- * On little endian architectures, this macro does nothing.
- *
- * \note This macro is designed for run-time conversion of data - for compile-time endianness
- * conversion, use \ref CPU_TO_LE16 instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define cpu_to_le16(x) x
-
- /** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
- * is in Little Endian format regardless of the currently selected CPU architecture.
- *
- * On little endian architectures, this macro does nothing.
- *
- * \note This macro is designed for run-time conversion of data - for compile-time endianness
- * conversion, use \ref CPU_TO_LE32 instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define cpu_to_le32(x) x
-
- /** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
- * is in Big Endian format regardless of the currently selected CPU architecture.
- *
- * On big endian architectures, this macro does nothing.
- *
- * \note This macro is designed for run-time conversion of data - for compile-time endianness
- * conversion, use \ref CPU_TO_BE16 instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define cpu_to_be16(x) SwapEndian_16(x)
-
- /** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
- * is in Big Endian format regardless of the currently selected CPU architecture.
- *
- * On big endian architectures, this macro does nothing.
- *
- * \note This macro is designed for run-time conversion of data - for compile-time endianness
- * conversion, use \ref CPU_TO_BE32 instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define cpu_to_be32(x) SwapEndian_32(x)
-
- //@}
-
- /** \name Compile-time endianness conversion */
- //@{
-
- /** Performs a conversion between a Little Endian encoded 16-bit piece of data and the
- * Endianness of the currently selected CPU architecture.
- *
- * On little endian architectures, this macro does nothing.
- *
- * \note This macro is designed for compile-time conversion of data - for run time endianness
- * conversion, use \ref le16_to_cpu instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define LE16_TO_CPU(x) x
-
- /** Performs a conversion between a Little Endian encoded 32-bit piece of data and the
- * Endianness of the currently selected CPU architecture.
- *
- * On little endian architectures, this macro does nothing.
- *
- * \note This macro is designed for compile-time conversion of data - for run time endianness
- * conversion, use \ref le32_to_cpu instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define LE32_TO_CPU(x) x
-
- /** Performs a conversion between a Big Endian encoded 16-bit piece of data and the
- * Endianness of the currently selected CPU architecture.
- *
- * On big endian architectures, this macro does nothing.
- *
- * \note This macro is designed for compile-time conversion of data - for run-time endianness
- * conversion, use \ref be16_to_cpu instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define BE16_TO_CPU(x) SWAPENDIAN_16(x)
-
- /** Performs a conversion between a Big Endian encoded 32-bit piece of data and the
- * Endianness of the currently selected CPU architecture.
- *
- * On big endian architectures, this macro does nothing.
- *
- * \note This macro is designed for compile-time conversion of data - for run-time endianness
- * conversion, use \ref be32_to_cpu instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define BE32_TO_CPU(x) SWAPENDIAN_32(x)
-
- /** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
- * is in Little Endian format regardless of the currently selected CPU architecture.
- *
- * On little endian architectures, this macro does nothing.
- *
- * \note This macro is designed for compile-time conversion of data - for run-time endianness
- * conversion, use \ref cpu_to_le16 instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define CPU_TO_LE16(x) x
-
- /** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
- * is in Little Endian format regardless of the currently selected CPU architecture.
- *
- * On little endian architectures, this macro does nothing.
- *
- * \note This macro is designed for compile-time conversion of data - for run-time endianness
- * conversion, use \ref cpu_to_le32 instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define CPU_TO_LE32(x) x
-
- /** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
- * is in Big Endian format regardless of the currently selected CPU architecture.
- *
- * On big endian architectures, this macro does nothing.
- *
- * \note This macro is designed for compile-time conversion of data - for run-time endianness
- * conversion, use \ref cpu_to_be16 instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define CPU_TO_BE16(x) SWAPENDIAN_16(x)
-
- /** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
- * is in Big Endian format regardless of the currently selected CPU architecture.
- *
- * On big endian architectures, this macro does nothing.
- *
- * \note This macro is designed for compile-time conversion of data - for run-time endianness
- * conversion, use \ref cpu_to_be32 instead.
- *
- * \ingroup Group_EndianConversion
- *
- * \param[in] x Data to perform the endianness conversion on.
- *
- * \return Endian corrected version of the input value.
- */
- #define CPU_TO_BE32(x) SWAPENDIAN_32(x)
-
- //! @}
- #endif
-
- /* Inline Functions: */
- /** Function to reverse the byte ordering of the individual bytes in a 16 bit value.
- *
- * \ingroup Group_ByteSwapping
- *
- * \param[in] Word Word of data whose bytes are to be swapped.
- */
- static inline uint16_t SwapEndian_16(const uint16_t Word) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
- static inline uint16_t SwapEndian_16(const uint16_t Word)
- {
- uint8_t Temp;
-
- union
- {
- uint16_t Word;
- uint8_t Bytes[2];
- } Data;
-
- Data.Word = Word;
-
- Temp = Data.Bytes[0];
- Data.Bytes[0] = Data.Bytes[1];
- Data.Bytes[1] = Temp;
-
- return Data.Word;
- }
-
- /** Function to reverse the byte ordering of the individual bytes in a 32 bit value.
- *
- * \ingroup Group_ByteSwapping
- *
- * \param[in] DWord Double word of data whose bytes are to be swapped.
- */
- static inline uint32_t SwapEndian_32(const uint32_t DWord) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
- static inline uint32_t SwapEndian_32(const uint32_t DWord)
- {
- uint8_t Temp;
-
- union
- {
- uint32_t DWord;
- uint8_t Bytes[4];
- } Data;
-
- Data.DWord = DWord;
-
- Temp = Data.Bytes[0];
- Data.Bytes[0] = Data.Bytes[3];
- Data.Bytes[3] = Temp;
-
- Temp = Data.Bytes[1];
- Data.Bytes[1] = Data.Bytes[2];
- Data.Bytes[2] = Temp;
-
- return Data.DWord;
- }
-
- /** Function to reverse the byte ordering of the individual bytes in a n byte value.
- *
- * \ingroup Group_ByteSwapping
- *
- * \param[in,out] Data Pointer to a number containing an even number of bytes to be reversed.
- * \param[in] Length Length of the data in bytes.
- */
- static inline void SwapEndian_n(void* const Data,
- uint8_t Length) ATTR_NON_NULL_PTR_ARG(1);
- static inline void SwapEndian_n(void* const Data,
- uint8_t Length)
- {
- uint8_t* CurrDataPos = (uint8_t*)Data;
-
- while (Length > 1)
- {
- uint8_t Temp = *CurrDataPos;
- *CurrDataPos = *(CurrDataPos + Length - 1);
- *(CurrDataPos + Length - 1) = Temp;
-
- CurrDataPos++;
- Length -= 2;
- }
- }
-
- /* Disable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- }
- #endif
-
-#endif
-
-/** @} */
+/* + LUFA Library + Copyright (C) Dean Camera, 2011. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + The author disclaim all warranties with regard to this + software, including all implied warranties of merchantability + and fitness. In no event shall the author be liable for any + special, indirect or consequential damages or any damages + whatsoever resulting from loss of use, data or profits, whether + in an action of contract, negligence or other tortious action, + arising out of or in connection with the use or performance of + this software. +*/ + +/** \file + * \brief Endianness and Byte Ordering macros and functions. + * + * \copydetails Group_Endianness + */ + +/** \ingroup Group_Endianness + * \defgroup Group_ByteSwapping Byte Reordering + * \brief Macros and functions for forced byte reordering. + */ + +/** \ingroup Group_Endianness + * \defgroup Group_EndianConversion Endianness Conversion + * \brief Macros and functions for automatic endianness conversion. + */ + +/** \ingroup Group_Common + * \defgroup Group_Endianness Endianness and Byte Ordering + * \brief Convenience macros and functions relating to byte (re-)ordering + * + * Common library convenience macros and functions relating to byte (re-)ordering. + * + * @{ + */ + +#ifndef __LUFA_ENDIANNESS_H__ +#define __LUFA_ENDIANNESS_H__ + + /* Enable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + extern "C" { + #endif + + /* Preprocessor Checks: */ + #if !defined(__INCLUDE_FROM_COMMON_H) + #error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality. + #endif + + #if !(defined(ARCH_BIG_ENDIAN) || defined(ARCH_LITTLE_ENDIAN)) + #error ARCH_BIG_ENDIAN or ARCH_LITTLE_ENDIAN not set for the specified architecture. + #endif + + /* Public Interface - May be used in end-application: */ + /* Macros: */ + /** Swaps the byte ordering of a 16-bit value at compile-time. Do not use this macro for swapping byte orderings + * of dynamic values computed at runtime, use \ref SwapEndian_16() instead. The result of this macro can be used + * inside struct or other variable initializers outside of a function, something that is not possible with the + * inline function variant. + * + * \ingroup Group_ByteSwapping + * + * \param[in] x 16-bit value whose byte ordering is to be swapped. + * + * \return Input value with the byte ordering reversed. + */ + #define SWAPENDIAN_16(x) (uint16_t)((((x) & 0xFF00) >> 8) | (((x) & 0x00FF) << 8)) + + /** Swaps the byte ordering of a 32-bit value at compile-time. Do not use this macro for swapping byte orderings + * of dynamic values computed at runtime- use \ref SwapEndian_32() instead. The result of this macro can be used + * inside struct or other variable initializers outside of a function, something that is not possible with the + * inline function variant. + * + * \ingroup Group_ByteSwapping + * + * \param[in] x 32-bit value whose byte ordering is to be swapped. + * + * \return Input value with the byte ordering reversed. + */ + #define SWAPENDIAN_32(x) (uint32_t)((((x) & 0xFF000000UL) >> 24UL) | (((x) & 0x00FF0000UL) >> 8UL) | \ + (((x) & 0x0000FF00UL) << 8UL) | (((x) & 0x000000FFUL) << 24UL)) + + #if defined(ARCH_BIG_ENDIAN) && !defined(le16_to_cpu) + #define le16_to_cpu(x) SwapEndian_16(x) + #define le32_to_cpu(x) SwapEndian_32(x) + #define be16_to_cpu(x) x + #define be32_to_cpu(x) x + #define cpu_to_le16(x) SwapEndian_16(x) + #define cpu_to_le32(x) SwapEndian_32(x) + #define cpu_to_be16(x) x + #define cpu_to_be32(x) x + #define LE16_TO_CPU(x) SWAPENDIAN_16(x) + #define LE32_TO_CPU(x) SWAPENDIAN_32(x) + #define BE16_TO_CPU(x) x + #define BE32_TO_CPU(x) x + #define CPU_TO_LE16(x) SWAPENDIAN_16(x) + #define CPU_TO_LE32(x) SWAPENDIAN_32(x) + #define CPU_TO_BE16(x) x + #define CPU_TO_BE32(x) x + #elif !defined(le16_to_cpu) + /** \name Run-time endianness conversion */ + //@{ + + /** Performs a conversion between a Little Endian encoded 16-bit piece of data and the + * Endianness of the currently selected CPU architecture. + * + * On little endian architectures, this macro does nothing. + * + * \note This macro is designed for run-time conversion of data - for compile-time endianness + * conversion, use \ref LE16_TO_CPU instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define le16_to_cpu(x) x + + /** Performs a conversion between a Little Endian encoded 32-bit piece of data and the + * Endianness of the currently selected CPU architecture. + * + * On little endian architectures, this macro does nothing. + * + * \note This macro is designed for run-time conversion of data - for compile-time endianness + * conversion, use \ref LE32_TO_CPU instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define le32_to_cpu(x) x + + /** Performs a conversion between a Big Endian encoded 16-bit piece of data and the + * Endianness of the currently selected CPU architecture. + * + * On big endian architectures, this macro does nothing. + * + * \note This macro is designed for run-time conversion of data - for compile-time endianness + * conversion, use \ref BE16_TO_CPU instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define be16_to_cpu(x) SwapEndian_16(x) + + /** Performs a conversion between a Big Endian encoded 32-bit piece of data and the + * Endianness of the currently selected CPU architecture. + * + * On big endian architectures, this macro does nothing. + * + * \note This macro is designed for run-time conversion of data - for compile-time endianness + * conversion, use \ref BE32_TO_CPU instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define be32_to_cpu(x) SwapEndian_32(x) + + /** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it + * is in Little Endian format regardless of the currently selected CPU architecture. + * + * On little endian architectures, this macro does nothing. + * + * \note This macro is designed for run-time conversion of data - for compile-time endianness + * conversion, use \ref CPU_TO_LE16 instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define cpu_to_le16(x) x + + /** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it + * is in Little Endian format regardless of the currently selected CPU architecture. + * + * On little endian architectures, this macro does nothing. + * + * \note This macro is designed for run-time conversion of data - for compile-time endianness + * conversion, use \ref CPU_TO_LE32 instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define cpu_to_le32(x) x + + /** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it + * is in Big Endian format regardless of the currently selected CPU architecture. + * + * On big endian architectures, this macro does nothing. + * + * \note This macro is designed for run-time conversion of data - for compile-time endianness + * conversion, use \ref CPU_TO_BE16 instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define cpu_to_be16(x) SwapEndian_16(x) + + /** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it + * is in Big Endian format regardless of the currently selected CPU architecture. + * + * On big endian architectures, this macro does nothing. + * + * \note This macro is designed for run-time conversion of data - for compile-time endianness + * conversion, use \ref CPU_TO_BE32 instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define cpu_to_be32(x) SwapEndian_32(x) + + //@} + + /** \name Compile-time endianness conversion */ + //@{ + + /** Performs a conversion between a Little Endian encoded 16-bit piece of data and the + * Endianness of the currently selected CPU architecture. + * + * On little endian architectures, this macro does nothing. + * + * \note This macro is designed for compile-time conversion of data - for run time endianness + * conversion, use \ref le16_to_cpu instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define LE16_TO_CPU(x) x + + /** Performs a conversion between a Little Endian encoded 32-bit piece of data and the + * Endianness of the currently selected CPU architecture. + * + * On little endian architectures, this macro does nothing. + * + * \note This macro is designed for compile-time conversion of data - for run time endianness + * conversion, use \ref le32_to_cpu instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define LE32_TO_CPU(x) x + + /** Performs a conversion between a Big Endian encoded 16-bit piece of data and the + * Endianness of the currently selected CPU architecture. + * + * On big endian architectures, this macro does nothing. + * + * \note This macro is designed for compile-time conversion of data - for run-time endianness + * conversion, use \ref be16_to_cpu instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define BE16_TO_CPU(x) SWAPENDIAN_16(x) + + /** Performs a conversion between a Big Endian encoded 32-bit piece of data and the + * Endianness of the currently selected CPU architecture. + * + * On big endian architectures, this macro does nothing. + * + * \note This macro is designed for compile-time conversion of data - for run-time endianness + * conversion, use \ref be32_to_cpu instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define BE32_TO_CPU(x) SWAPENDIAN_32(x) + + /** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it + * is in Little Endian format regardless of the currently selected CPU architecture. + * + * On little endian architectures, this macro does nothing. + * + * \note This macro is designed for compile-time conversion of data - for run-time endianness + * conversion, use \ref cpu_to_le16 instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define CPU_TO_LE16(x) x + + /** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it + * is in Little Endian format regardless of the currently selected CPU architecture. + * + * On little endian architectures, this macro does nothing. + * + * \note This macro is designed for compile-time conversion of data - for run-time endianness + * conversion, use \ref cpu_to_le32 instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define CPU_TO_LE32(x) x + + /** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it + * is in Big Endian format regardless of the currently selected CPU architecture. + * + * On big endian architectures, this macro does nothing. + * + * \note This macro is designed for compile-time conversion of data - for run-time endianness + * conversion, use \ref cpu_to_be16 instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define CPU_TO_BE16(x) SWAPENDIAN_16(x) + + /** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it + * is in Big Endian format regardless of the currently selected CPU architecture. + * + * On big endian architectures, this macro does nothing. + * + * \note This macro is designed for compile-time conversion of data - for run-time endianness + * conversion, use \ref cpu_to_be32 instead. + * + * \ingroup Group_EndianConversion + * + * \param[in] x Data to perform the endianness conversion on. + * + * \return Endian corrected version of the input value. + */ + #define CPU_TO_BE32(x) SWAPENDIAN_32(x) + + //! @} + #endif + + /* Inline Functions: */ + /** Function to reverse the byte ordering of the individual bytes in a 16 bit value. + * + * \ingroup Group_ByteSwapping + * + * \param[in] Word Word of data whose bytes are to be swapped. + */ + static inline uint16_t SwapEndian_16(const uint16_t Word) ATTR_WARN_UNUSED_RESULT ATTR_CONST; + static inline uint16_t SwapEndian_16(const uint16_t Word) + { + uint8_t Temp; + + union + { + uint16_t Word; + uint8_t Bytes[2]; + } Data; + + Data.Word = Word; + + Temp = Data.Bytes[0]; + Data.Bytes[0] = Data.Bytes[1]; + Data.Bytes[1] = Temp; + + return Data.Word; + } + + /** Function to reverse the byte ordering of the individual bytes in a 32 bit value. + * + * \ingroup Group_ByteSwapping + * + * \param[in] DWord Double word of data whose bytes are to be swapped. + */ + static inline uint32_t SwapEndian_32(const uint32_t DWord) ATTR_WARN_UNUSED_RESULT ATTR_CONST; + static inline uint32_t SwapEndian_32(const uint32_t DWord) + { + uint8_t Temp; + + union + { + uint32_t DWord; + uint8_t Bytes[4]; + } Data; + + Data.DWord = DWord; + + Temp = Data.Bytes[0]; + Data.Bytes[0] = Data.Bytes[3]; + Data.Bytes[3] = Temp; + + Temp = Data.Bytes[1]; + Data.Bytes[1] = Data.Bytes[2]; + Data.Bytes[2] = Temp; + + return Data.DWord; + } + + /** Function to reverse the byte ordering of the individual bytes in a n byte value. + * + * \ingroup Group_ByteSwapping + * + * \param[in,out] Data Pointer to a number containing an even number of bytes to be reversed. + * \param[in] Length Length of the data in bytes. + */ + static inline void SwapEndian_n(void* const Data, + uint8_t Length) ATTR_NON_NULL_PTR_ARG(1); + static inline void SwapEndian_n(void* const Data, + uint8_t Length) + { + uint8_t* CurrDataPos = (uint8_t*)Data; + + while (Length > 1) + { + uint8_t Temp = *CurrDataPos; + *CurrDataPos = *(CurrDataPos + Length - 1); + *(CurrDataPos + Length - 1) = Temp; + + CurrDataPos++; + Length -= 2; + } + } + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + +#endif + +/** @} */ |