#define __COMMON_H__
/* Includes: */
- #include <avr/io.h>
+ #include <stdint.h>
+ #include <stdbool.h>
#include "Attributes.h"
#include "BoardTypes.h"
/* Public Interface - May be used in end-application: */
- /* Macros: */
+ /* Macros: */
/** 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
#define MACROE while (0)
/** Defines a volatile 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
+ * be set as a breakpoint in the resulting code. Useful for debugging purposes, where the optimiser
* removes/reorders code to the point where break points cannot reliably be set.
*
* \ingroup Group_Debugging
*/
- #define JTAG_DEBUG_POINT() asm volatile ("NOP" ::)
+ #define JTAG_DEBUG_POINT() __asm__ volatile ("NOP" ::)
/** 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
*/
- #define JTAG_DEBUG_BREAK() asm volatile ("BREAK" ::)
+ #define JTAG_DEBUG_BREAK() __asm__ volatile ("BREAK" ::)
/** Macro for testing condition "x" and breaking via JTAG_DEBUG_BREAK() if the condition is false.
*
*/
#define JTAG_DEBUG_ASSERT(x) MACROS{ if (!(x)) { JTAG_DEBUG_BREAK(); } }MACROE
- /** Macro for testing condition "x" and writing debug data to the serial stream if false. As a
- * prerequisite for this macro, the serial stream should be configured via the Peripheral/SerialStream driver.
+ /** Macro for testing condition "x" and writing debug data to the stdout stream if false. The stdout stream
+ * must be pre-initialized before this macro is run and linked to an output device, such as the AVR's USART
+ * peripheral.
*
- * The serial output takes the form "{FILENAME}: Function {FUNCTION NAME}, Line {LINE NUMBER}: Assertion
- * {x} failed."
+ * The output takes the form "{FILENAME}: Function {FUNCTION NAME}, Line {LINE NUMBER}: Assertion {x} failed."
*
* \ingroup Group_Debugging
*/
- #define SERIAL_STREAM_ASSERT(x) MACROS{ if (!(x)) { printf_P(PSTR("%s: Function \"%s\", Line %d: " \
- "Assertion \"%s\" failed.\r\n"), \
- __FILE__, __func__, __LINE__, #x); } \
- }MACROE
-
+ #define STDOUT_ASSERT(x) MACROS{ if (!(x)) { printf_P(PSTR("%s: Function \"%s\", Line %d: " \
+ "Assertion \"%s\" failed.\r\n"), \
+ __FILE__, __func__, __LINE__, #x); } }MACROE
+
+ #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()
+ * macro with a 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.
+ *
+ * \param[in] Addr Address of the pointer to read.
+ *
+ * \return Pointer retrieved from PROGMEM space.
+ */
+ #define pgm_read_ptr(Addr) (void*)pgm_read_word(Addr)
+ #endif
+
+ /** 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.
+ *
+ * \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) ((((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.
+ *
+ * \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))
+
/* Inline Functions: */
/** Function to reverse the individual bits in a byte - i.e. bit 7 is moved to bit 0, bit 6 to bit 1,
* etc.
*
* \ingroup Group_BitManip
*
- * \param[in] Byte Byte of data whose bits are to be reversed
+ * \param[in] Byte Byte of data whose bits are to be reversed.
*/
static inline uint8_t BitReverse(uint8_t Byte) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
static inline uint8_t BitReverse(uint8_t Byte)
*
* \ingroup Group_BitManip
*
- * \param[in] Word Word of data whose bytes are to be swapped
+ * \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)
{
- return ((Word >> 8) | (Word << 8));
+ 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 number.
*
* \ingroup Group_BitManip
*
- * \param[in] DWord Double word of data whose bytes are to be swapped
+ * \param[in] DWord Double word of data whose bytes are to be swapped.
*/
- 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;
}
/** Function to reverse the byte ordering of the individual bytes in a n byte number.
*
* \ingroup Group_BitManip
*
- * \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)
{
uint8_t* CurrDataPos = (uint8_t*)Data;
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