You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
185 lines
6.7 KiB
185 lines
6.7 KiB
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2009.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.fourwalledcubicle.com
|
|
*/
|
|
|
|
/*
|
|
Copyright 2009 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
|
|
*
|
|
* 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, FunctionAttributes.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
|
|
* aspects of the library.
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
/** @defgroup Group_Debugging Debugging Macros
|
|
*
|
|
* Macros for debugging use.
|
|
*/
|
|
|
|
/** @defgroup Group_BitManip Endian and Bit Macros
|
|
*
|
|
* Functions for swapping endianness and reversing bit orders.
|
|
*/
|
|
|
|
#ifndef __COMMON_H__
|
|
#define __COMMON_H__
|
|
|
|
/* Includes: */
|
|
#include <avr/io.h>
|
|
|
|
#include "FunctionAttributes.h"
|
|
#include "BoardTypes.h"
|
|
|
|
/* Public Interface - May be used in end-application: */
|
|
/* 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
|
|
* a block (such as inline IF statements).
|
|
*/
|
|
#define MACROS do
|
|
|
|
/** Macro for encasing other multi-statement macros. This should be used along with a preceding closing
|
|
* brace at the end 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
|
|
* a block (such as inline IF statements).
|
|
*/
|
|
#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
|
|
* removes/reorders code to the point where break points cannot reliably be set.
|
|
*
|
|
* \ingroup Group_Debugging
|
|
*/
|
|
#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" ::)
|
|
|
|
/** Macro for testing condition "x" and breaking via JTAG_DEBUG_BREAK() if the condition is false.
|
|
*
|
|
* \ingroup Group_Debugging
|
|
*/
|
|
#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.
|
|
*
|
|
* The serial 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
|
|
|
|
/* 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
|
|
*/
|
|
static inline uint8_t BitReverse(uint8_t Byte) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
|
|
static inline uint8_t BitReverse(uint8_t Byte)
|
|
{
|
|
Byte = (((Byte & 0xF0) >> 4) | ((Byte & 0x0F) << 4));
|
|
Byte = (((Byte & 0xCC) >> 2) | ((Byte & 0x33) << 2));
|
|
Byte = (((Byte & 0xAA) >> 1) | ((Byte & 0x55) << 1));
|
|
|
|
return Byte;
|
|
}
|
|
|
|
/** 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)
|
|
{
|
|
return ((Word >> 8) | (Word << 8));
|
|
}
|
|
|
|
/** 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
|
|
*/
|
|
static inline uint32_t SwapEndian_32(uint32_t DWord) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
|
|
static inline uint32_t SwapEndian_32(uint32_t DWord)
|
|
{
|
|
return (((DWord & 0xFF000000) >> 24) |
|
|
((DWord & 0x00FF0000) >> 8) |
|
|
((DWord & 0x0000FF00) << 8) |
|
|
((DWord & 0x000000FF) << 24));
|
|
}
|
|
|
|
/** 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
|
|
*/
|
|
static inline void SwapEndian_n(uint8_t* Data, uint8_t Bytes);
|
|
static inline void SwapEndian_n(uint8_t* Data, uint8_t Bytes)
|
|
{
|
|
uint8_t Temp;
|
|
|
|
while (Bytes)
|
|
{
|
|
Temp = *Data;
|
|
*Data = *(Data + Bytes - 1);
|
|
*(Data + Bytes) = Temp;
|
|
|
|
Data++;
|
|
Bytes -= 2;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
/** @} */
|