Abuse the the C preprocessor so that the HID macros can automatically encode data...

[pub/USBasp.git] / LUFA / Common / Common.h

diff --git a/LUFA/Common/Common.h b/LUFA/Common/Common.h
index c750e40..837cb04 100644 (file)
--- a/LUFA/Common/Common.h
+++ b/LUFA/Common/Common.h
@@ -1,21 +1,21 @@
 /*
              LUFA Library
 /*
              LUFA Library

-     Copyright (C) Dean Camera, 2010.
-              
+     Copyright (C) Dean Camera, 2011.
+

   dean [at] fourwalledcubicle [dot] com
   dean [at] fourwalledcubicle [dot] com

-      www.fourwalledcubicle.com
+           www.lufa-lib.org

 */
 
 /*
 */
 
 /*

-  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)

 
 

-  Permission to use, copy, modify, distribute, and sell this 
+  Permission to use, copy, modify, distribute, and sell this

   software and its documentation for any purpose is hereby granted
   software and its documentation for any purpose is hereby granted

-  without fee, provided that the above copyright notice appear in 
+  without fee, provided that the above copyright notice appear in

   all copies and that both that the copyright notice and this
   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 
+  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


@@ -32,9 +32,9 @@
  *  \brief Common library convenience macros and functions.
  *
  *  This file contains macros which are common to all library elements, and which may be useful in user code. It
  *  \brief Common library convenience macros and functions.
  *
  *  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.
+ *  also includes other common code headers.

  */
  */

- 
+

 /** @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


@@ -47,7 +47,7 @@
  *
  *  Macros for debugging use.
  */
  *
  *  Macros for debugging use.
  */

- 
+

 /** @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.


@@ -59,7 +59,7 @@
        /* Includes: */
                #include <stdint.h>
                #include <stdbool.h>
        /* Includes: */
                #include <stdint.h>
                #include <stdbool.h>

-       
+

                #include "Attributes.h"
                #include "BoardTypes.h"
 
                #include "Attributes.h"
                #include "BoardTypes.h"
 


@@ -68,53 +68,67 @@
                        /** 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

-                        *  a block (such as inline IF statements).
+                        *  a block (such as inline \c 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
                         */
                        #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).
+                        *  a block (such as inline \c if statements).

                         */
                        #define MACROE                  while (0)
                         */
                        #define MACROE                  while (0)

-                       
-                       /** Defines a volatile NOP statement which cannot be optimized out by the compiler, and thus can always
+
+                       /** Defines a volatile \c 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 optimiser
                         *  removes/reorders code to the point where break points cannot reliably be set.
                         *
                         *  \ingroup Group_Debugging
                         */
                         *  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
+                       /** Defines an explicit JTAG break point in the resulting binary via the assembly \c BREAK statement. When

                         *  a JTAG is used, this causes the program execution to halt when reached until manually resumed.
                         *
                         *  \ingroup Group_Debugging
                         */
                         *  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.
+                       #define JTAG_DEBUG_BREAK()      __asm__ __volatile__ ("BREAK" ::)
+
+                       /** Macro for testing condition "x" and breaking via \ref JTAG_DEBUG_BREAK() if the condition is false.
+                        *
+                        *  \param[in] Condition  Condition that will be evaluated,

                         *
                         *  \ingroup Group_Debugging
                        */
                         *
                         *  \ingroup Group_Debugging
                        */

-                       #define JTAG_DEBUG_ASSERT(x)    MACROS{ if (!(x)) { JTAG_DEBUG_BREAK(); } }MACROE
+                       #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 false. The stdout stream
+                       /** 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 AVR's USART
                         *  peripheral.
                         *
                         *  must be pre-initialized before this macro is run and linked to an output device, such as the AVR's USART
                         *  peripheral.
                         *

-                        *  The 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 {Condition} failed."
+                        *
+                        *  \param[in] Condition  Condition that will be evaluated,

                         *
                         *  \ingroup Group_Debugging
                         */
                         *
                         *  \ingroup Group_Debugging
                         */

-                       #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
+                       #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
+                       
+                       /** Forces GCC to use pointer indirection (via the AVR's pointer register pairs) when accessing the given
+                        *  struct pointer. In some cases GCC will emit non-optimal assembly code when accessing a structure through
+                        *  a pointer, resulting in a larger binary. When this macro is used on a (non \c const) structure pointer before
+                        *  use, it will force GCC to use pointer indirection on the elements rather than direct store and load
+                        *  instructions.
+                        *
+                        *  \param[in, out] StructPtr  Pointer to a structure which is to be forced into indirect access mode.
+                        */
+                       #define GCC_FORCE_POINTER_ACCESS(StructPtr) __asm__ __volatile__("" : "=b" (StructPtr) : "0" (StructPtr))

 
                        #if !defined(pgm_read_ptr) || defined(__DOXYGEN__)
 
                        #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
+                               /** Reads a pointer out of PROGMEM space. 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.
                                 *
                                 *  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.
                                 *


@@ -165,7 +179,7 @@
 
                                return Byte;
                        }
 
                                return Byte;
                        }

-                       
+

                        /** Function to reverse the byte ordering of the individual bytes in a 16 bit number.
                         *
                         *  \ingroup Group_BitManip
                        /** Function to reverse the byte ordering of the individual bytes in a 16 bit number.
                         *
                         *  \ingroup Group_BitManip


@@ -182,13 +196,13 @@
                                        uint16_t Word;
                                        uint8_t  Bytes[2];
                                } Data;
                                        uint16_t Word;
                                        uint8_t  Bytes[2];
                                } Data;

-                               
+

                                Data.Word = Word;
                                Data.Word = Word;

-                               
+

                                Temp = Data.Bytes[0];
                                Data.Bytes[0] = Data.Bytes[1];
                                Data.Bytes[1] = Temp;
                                Temp = Data.Bytes[0];
                                Data.Bytes[0] = Data.Bytes[1];
                                Data.Bytes[1] = Temp;

-                               
+

                                return Data.Word;
                        }
 
                                return Data.Word;
                        }
 


@@ -208,17 +222,17 @@
                                        uint32_t DWord;
                                        uint8_t  Bytes[4];
                                } Data;
                                        uint32_t DWord;
                                        uint8_t  Bytes[4];
                                } Data;

-                               
+

                                Data.DWord = DWord;
                                Data.DWord = DWord;

-                               
+

                                Temp = Data.Bytes[0];
                                Data.Bytes[0] = Data.Bytes[3];
                                Data.Bytes[3] = Temp;
                                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;
                                Temp = Data.Bytes[1];
                                Data.Bytes[1] = Data.Bytes[2];
                                Data.Bytes[2] = Temp;

-                               
+

                                return Data.DWord;
                        }
 
                                return Data.DWord;
                        }
 


@@ -235,7 +249,7 @@
                                                        uint8_t Bytes)
                        {
                                uint8_t* CurrDataPos = (uint8_t*)Data;
                                                        uint8_t Bytes)
                        {
                                uint8_t* CurrDataPos = (uint8_t*)Data;

-                       
+

                                while (Bytes > 1)
                                {
                                        uint8_t Temp = *CurrDataPos;
                                while (Bytes > 1)
                                {
                                        uint8_t Temp = *CurrDataPos;


@@ -250,3 +264,4 @@
 #endif
 
 /** @} */
 #endif
 
 /** @} */

+