- /** 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.
- *
- * \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) ((((x) & 0xFF000000UL) >> 24UL) | (((x) & 0x00FF0000UL) >> 8UL) | \
- (((x) & 0x0000FF00UL) << 8UL) | (((x) & 0x000000FFUL) << 24UL))
+ /** 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
+ * state with unintentional side-effects.
+ *
+ * Interrupt handlers written using this macro may still need to be registered with the microcontroller's
+ * Interrupt Controller (if present) before they will properly handle incoming interrupt events.
+ *
+ * \note This macro is only supplied on some architectures, where the standard library does not include a valid
+ * definition. If an existing definition exists, the alternative definition here will be ignored.
+ *
+ * \ingroup Group_GlobalInt
+ *
+ * \param Name Unique name of the interrupt service routine.
+ */
+ #define ISR(Name, ...) void Name (void) __attribute__((__interrupt__)) __VA_ARGS__; void Name (void)
+ #endif
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