diff options
Diffstat (limited to 'LUFA/Common')
| -rw-r--r-- | LUFA/Common/ArchitectureSpecific.h | 143 | ||||
| -rw-r--r-- | LUFA/Common/Architectures.h | 168 | ||||
| -rw-r--r-- | LUFA/Common/Common.h | 78 | ||||
| -rw-r--r-- | LUFA/Common/CompilerSpecific.h | 196 | ||||
| -rw-r--r-- | LUFA/Common/Endianness.h | 958 |
5 files changed, 812 insertions, 731 deletions
diff --git a/LUFA/Common/ArchitectureSpecific.h b/LUFA/Common/ArchitectureSpecific.h new file mode 100644 index 00000000..3920cb94 --- /dev/null +++ b/LUFA/Common/ArchitectureSpecific.h @@ -0,0 +1,143 @@ +/*
+ 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 Architecture specific definitions relating to specific processor architectures.
+ *
+ * \copydetails Group_ArchitectureSpecific
+ *
+ * \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_ArchitectureSpecific Architecture Specific Definitions
+ * \brief Architecture specific definitions relating to specific processor architectures.
+ *
+ * Architecture specific macros, functions and other definitions, which relate to specific architectures. This
+ * definitions may or may not be available in some form on other architectures, and thus should be protected by
+ * preprocessor checks in portable code to prevent compile errors.
+ *
+ * @{
+ */
+
+#ifndef __LUFA_ARCHSPEC_H__
+#define __LUFA_ARCHSPEC_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 (ARCH == ARCH_AVR8) || defined(__DOXYGEN__)
+ /** Disables the AVR's JTAG bus in software, until a system reset. This will override the current JTAG
+ * status as set by the JTAGEN fuse, disabling JTAG debugging and reverting the JTAG pins back to GPIO
+ * mode.
+ *
+ * \note This macro is not available for all architectures.
+ */
+ #define JTAG_DISABLE() MACROS{ \
+ __asm__ __volatile__ ( \
+ "in __tmp_reg__,__SREG__" "\n\t" \
+ "cli" "\n\t" \
+ "out %1, %0" "\n\t" \
+ "out __SREG__, __tmp_reg__" "\n\t" \
+ "out %1, %0" "\n\t" \
+ : \
+ : "r" (1 << JTD), \
+ "M" (_SFR_IO_ADDR(MCUCR)) \
+ : "r0"); \
+ }MACROE
+
+ /** Defines a volatile \c NOP statement which cannot be optimized out by the compiler, and thus can always
+ * be set as a breakpoint in the resulting code. Useful for debugging purposes, where the optimizer
+ * removes/reorders code to the point where break points cannot reliably be set.
+ *
+ * \note This macro is not available for all architectures.
+ */
+ #define JTAG_DEBUG_POINT() __asm__ __volatile__ ("nop" ::)
+
+ /** Defines an explicit JTAG break point in the resulting binary via the assembly \c BREAK statement. When
+ * a JTAG is used, this causes the program execution to halt when reached until manually resumed.
+ *
+ * \note This macro is not available for all architectures.
+ */
+ #define JTAG_DEBUG_BREAK() __asm__ __volatile__ ("break" ::)
+
+ /** Macro for testing condition "x" and breaking via \ref JTAG_DEBUG_BREAK() if the condition is false.
+ *
+ * \note This macro is not available for all architectures.
+ *
+ * \param[in] Condition Condition that will be evaluated.
+ */
+ #define JTAG_ASSERT(Condition) MACROS{ if (!(Condition)) { JTAG_DEBUG_BREAK(); } }MACROE
+
+ /** Macro for testing condition \c "x" and writing debug data to the stdout stream if \c false. The stdout stream
+ * must be pre-initialized before this macro is run and linked to an output device, such as the microcontroller's
+ * USART peripheral.
+ *
+ * The output takes the form "{FILENAME}: Function {FUNCTION NAME}, Line {LINE NUMBER}: Assertion {Condition} failed."
+ *
+ * \note This macro is not available for all architectures.
+ *
+ * \param[in] Condition Condition that will be evaluated,
+ */
+ #define STDOUT_ASSERT(Condition) MACROS{ if (!(x)) { printf_P(PSTR("%s: Function \"%s\", Line %d: " \
+ "Assertion \"%s\" failed.\r\n"), \
+ __FILE__, __func__, __LINE__, #Condition); } }MACROE
+
+ #if !defined(pgm_read_ptr) || defined(__DOXYGEN__)
+ /** Reads a pointer out of PROGMEM space on the AVR8 architecture. This is currently a wrapper for the
+ * avr-libc \c pgm_read_ptr() macro with a \c void* cast, so that its value can be assigned directly
+ * to a pointer variable or used in pointer arithmetic without further casting in C. In a future
+ * avr-libc distribution this will be part of the standard API and will be implemented in a more formal
+ * manner.
+ *
+ * \note This macro is not available for all architectures.
+ *
+ * \param[in] Address Address of the pointer to read.
+ *
+ * \return Pointer retrieved from PROGMEM space.
+ */
+ #define pgm_read_ptr(Address) (void*)pgm_read_word(Address)
+ #endif
+ #endif
+
+ /* Disable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ }
+ #endif
+
+#endif
+
+/** @} */
+
diff --git a/LUFA/Common/Architectures.h b/LUFA/Common/Architectures.h index 8dab72ae..dad3ba7d 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/Common.h b/LUFA/Common/Common.h index 162d8516..e9faf7af 100644 --- a/LUFA/Common/Common.h +++ b/LUFA/Common/Common.h @@ -42,12 +42,6 @@ * * @{ */ - -/** \defgroup Group_Debugging Debugging Macros - * \brief Convenience macros to aid in debugging applications. - * - * Macros to aid debugging of a user application. - */ /** \defgroup Group_GlobalInt Global Interrupt Macros * \brief Convenience macros for the management of interrupts globally within the device. @@ -71,6 +65,7 @@ #include "LUFAConfig.h" #endif + #include "ArchitectureSpecific.h" #include "CompilerSpecific.h" #include "Architectures.h" #include "Attributes.h" @@ -165,7 +160,7 @@ * \return The larger of the two input parameters */ #if !defined(MAX) || defined(__DOXYGEN__) - #define MAX(x, y) ((x > y) ? x : y) + #define MAX(x, y) (((x) > (y)) ? (x) : (y)) #endif /** Convenience macro to determine the smaller of two values. @@ -179,7 +174,7 @@ * \return The smaller of the two input parameters */ #if !defined(MIN) || defined(__DOXYGEN__) - #define MIN(x, y) ((x < y) ? x : y) + #define MIN(x, y) (((x) < (y)) ? (x) : (y)) #endif #if !defined(STRINGIFY) || defined(__DOXYGEN__) @@ -202,69 +197,6 @@ #define STRINGIFY_EXPANDED(x) STRINGIFY(x) #endif - #if (ARCH == ARCH_AVR8) || defined(__DOXYGEN__) - /** Defines a volatile \c NOP statement which cannot be optimized out by the compiler, and thus can always - * be set as a breakpoint in the resulting code. Useful for debugging purposes, where the optimizer - * removes/reorders code to the point where break points cannot reliably be set. - * - * \note This macro is not available for all architectures. - * - * \ingroup Group_Debugging - */ - #define JTAG_DEBUG_POINT() __asm__ __volatile__ ("NOP" ::) - - /** Defines an explicit JTAG break point in the resulting binary via the assembly \c BREAK statement. When - * a JTAG is used, this causes the program execution to halt when reached until manually resumed. - * - * \note This macro is not available for all architectures. - * - * \ingroup Group_Debugging - */ - #define JTAG_DEBUG_BREAK() __asm__ __volatile__ ("BREAK" ::) - - /** Macro for testing condition "x" and breaking via \ref JTAG_DEBUG_BREAK() if the condition is false. - * - * \note This macro is not available for all architectures. - * - * \param[in] Condition Condition that will be evaluated. - * - * \ingroup Group_Debugging - */ - #define JTAG_DEBUG_ASSERT(Condition) MACROS{ if (!(Condition)) { JTAG_DEBUG_BREAK(); } }MACROE - - /** Macro for testing condition "x" and writing debug data to the stdout stream if \c false. The stdout stream - * must be pre-initialized before this macro is run and linked to an output device, such as the microcontroller's - * USART peripheral. - * - * The output takes the form "{FILENAME}: Function {FUNCTION NAME}, Line {LINE NUMBER}: Assertion {Condition} failed." - * - * \note This macro is not available for all architectures. - * - * \param[in] Condition Condition that will be evaluated, - * - * \ingroup Group_Debugging - */ - #define STDOUT_ASSERT(Condition) MACROS{ if (!(x)) { printf_P(PSTR("%s: Function \"%s\", Line %d: " \ - "Assertion \"%s\" failed.\r\n"), \ - __FILE__, __func__, __LINE__, #Condition); } }MACROE - - #if !defined(pgm_read_ptr) || defined(__DOXYGEN__) - /** Reads a pointer out of PROGMEM space on the AVR8 architecture. This is currently a wrapper for the - * avr-libc \c pgm_read_ptr() macro with a \c void* cast, so that its value can be assigned directly - * to a pointer variable or used in pointer arithmetic without further casting in C. In a future - * avr-libc distribution this will be part of the standard API and will be implemented in a more formal - * manner. - * - * \note This macro is not available for all architectures. - * - * \param[in] Address Address of the pointer to read. - * - * \return Pointer retrieved from PROGMEM space. - */ - #define pgm_read_ptr(Address) (void*)pgm_read_word(Address) - #endif - #endif - #if !defined(ISR) || defined(__DOXYGEN__) /** Macro for the definition of interrupt service routines, so that the compiler can insert the required * prologue and epilogue code to properly manage the interrupt routine without affecting the main thread's @@ -305,8 +237,8 @@ * * \param[in] Milliseconds Number of milliseconds to delay */ - static inline void Delay_MS(uint8_t Milliseconds) ATTR_ALWAYS_INLINE; - static inline void Delay_MS(uint8_t Milliseconds) + static inline void Delay_MS(uint16_t Milliseconds) ATTR_ALWAYS_INLINE; + static inline void Delay_MS(uint16_t Milliseconds) { #if (ARCH == ARCH_AVR8) if (GCC_IS_COMPILE_CONST(Milliseconds)) diff --git a/LUFA/Common/CompilerSpecific.h b/LUFA/Common/CompilerSpecific.h index 9dcd7637..96d37cd7 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 definitions 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 Definitions + * \brief Compiler specific definitions for code optimization and correctness. + * + * Compiler specific definitions 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, false otherwise. + */ + #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 58f8012c..6e84626e 100644 --- a/LUFA/Common/Endianness.h +++ b/LUFA/Common/Endianness.h @@ -1,476 +1,482 @@ -/*
- 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) + { + if (GCC_IS_COMPILE_CONST(Word)) + return SWAPENDIAN_16(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) + { + if (GCC_IS_COMPILE_CONST(DWord)) + return SWAPENDIAN_32(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 + +/** @} */ |