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    • Dean Camera's avatar
      f555ad7c
      Altered all endpoint/pipe stream transfers so that the new BytesProcessed... · f555ad7c
      Dean Camera authored
      Altered all endpoint/pipe stream transfers so that the new BytesProcessed parameter now points to a location where the number of bytes in the transfer that have been completed can be stored (or NULL if entire transaction should be performed in one chunk).
      
      Added new Endpoint_Null_Stream() and Pipe_Null_stream() functions.
      
      Removed the NO_STREAM_CALLBACKS compile time option due to the new partial stream transfer feature replacing it.
      
      Fixed errors in the incomplete Test and Measurement device demo preventing proper operation (thanks to Pavel Plotnikov).
      f555ad7c
      History
      Altered all endpoint/pipe stream transfers so that the new BytesProcessed...
      Dean Camera authored
      Altered all endpoint/pipe stream transfers so that the new BytesProcessed parameter now points to a location where the number of bytes in the transfer that have been completed can be stored (or NULL if entire transaction should be performed in one chunk).
      
      Added new Endpoint_Null_Stream() and Pipe_Null_stream() functions.
      
      Removed the NO_STREAM_CALLBACKS compile time option due to the new partial stream transfer feature replacing it.
      
      Fixed errors in the incomplete Test and Measurement device demo preventing proper operation (thanks to Pavel Plotnikov).
    Common.h NaN GiB
    /*
                 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, and distribute this software
      and its documentation for any purpose and without fee is hereby
      granted, 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 <stdio.h>
    		#include <avr/version.h>
    		
    		#include "FunctionAttributes.h"
    		#include "BoardTypes.h"
    		
    		#include <alloca.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 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 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 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 Data   Pointer to a number containing an even number of bytes to be reversed
    			 *  \param 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
    
    /** @} */