- Permission to use, copy, modify, distribute, and sell this
+ Permission to use, copy, modify, distribute, and sell 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
+ 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 without specific, written prior permission.
The author disclaim all warranties with regard to this
* This file contains macros which are common to all library elements, and which may be useful in user code. It
* also includes other common headers, such as Atomic.h, Attributes.h and BoardTypes.h.
*/
* This file contains macros which are common to all library elements, and which may be useful in user code. It
* also includes other common headers, such as Atomic.h, Attributes.h and BoardTypes.h.
*/
/** @defgroup Group_Common Common Utility Headers - LUFA/Drivers/Common/Common.h
*
* Common utility headers containing macros, functions, enums and types which are common to all
/** @defgroup Group_Common Common Utility Headers - LUFA/Drivers/Common/Common.h
*
* Common utility headers containing macros, functions, enums and types which are common to all
/** @defgroup Group_BitManip Endian and Bit Macros
*
* Functions for swapping endianness and reversing bit orders.
/** @defgroup Group_BitManip Endian and Bit Macros
*
* Functions for swapping endianness and reversing bit orders.
/** Macro for encasing other multi-statement macros. This should be used along with an opening brace
* before the start of any multi-statement macro, so that the macros contents as a whole are treated
* as a discrete block and not as a list of separate statements which may cause problems when used as
/** Macro for encasing other multi-statement macros. This should be used along with an opening brace
* before the start of any multi-statement macro, so that the macros contents as a whole are treated
* as a discrete block and not as a list of separate statements which may cause problems when used as
* removes/reorders code to the point where break points cannot reliably be set.
*
* \ingroup Group_Debugging
*/
* removes/reorders code to the point where break points cannot reliably be set.
*
* \ingroup Group_Debugging
*/
/** Defines an explicit JTAG break point in the resulting binary via the ASM BREAK statement. When
* a JTAG is used, this causes the program execution to halt when reached until manually resumed.
*
* \ingroup Group_Debugging
*/
/** Defines an explicit JTAG break point in the resulting binary via the ASM BREAK statement. When
* a JTAG is used, this causes the program execution to halt when reached until manually resumed.
*
* \ingroup Group_Debugging
*/
/** Macro for testing condition "x" and breaking via JTAG_DEBUG_BREAK() if the condition is false.
*
* \ingroup Group_Debugging
/** Macro for testing condition "x" and breaking via JTAG_DEBUG_BREAK() if the condition is false.
*
* \ingroup Group_Debugging
#if !defined(pgm_read_ptr) || defined(__DOXYGEN__)
/** Reads a pointer out of PROGMEM space. This is currently a wrapper for the avr-libc pgm_read_ptr()
#if !defined(pgm_read_ptr) || defined(__DOXYGEN__)
/** Reads a pointer out of PROGMEM space. This is currently a wrapper for the avr-libc pgm_read_ptr()
* 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.
*
* 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.
*
/** Function to reverse the byte ordering of the individual bytes in a 16 bit number.
*
* \ingroup Group_BitManip
*
* \param[in] Word Word of data whose bytes are to be swapped.
*/
/** Function to reverse the byte ordering of the individual bytes in a 16 bit number.
*
* \ingroup Group_BitManip
*
* \param[in] Word Word of data whose bytes are to be swapped.
*/
- static inline uint16_t SwapEndian_16(uint16_t Word) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
- static inline uint16_t SwapEndian_16(uint16_t Word)
+ 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)
- static inline uint32_t SwapEndian_32(uint32_t DWord) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
- static inline uint32_t SwapEndian_32(uint32_t DWord)
+ 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)
- return (((DWord & 0xFF000000) >> 24) |
- ((DWord & 0x00FF0000) >> 8) |
- ((DWord & 0x0000FF00) << 8) |
- ((DWord & 0x000000FF) << 24));
+ 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;
* \param[in,out] Data Pointer to a number containing an even number of bytes to be reversed.
* \param[in] Bytes Length of the data in bytes.
*/
* \param[in,out] Data Pointer to a number containing an even number of bytes to be reversed.
* \param[in] Bytes Length of the data in bytes.
*/
- static inline void SwapEndian_n(void* Data, uint8_t Bytes);
- static inline void SwapEndian_n(void* Data, uint8_t Bytes)
+ static inline void SwapEndian_n(void* Data,
+ uint8_t Bytes) ATTR_NON_NULL_PTR_ARG(1);
+ static inline void SwapEndian_n(void* Data,
+ uint8_t Bytes)
projects / pub / USBasp.git / blobdiff