protocol/lufa/LUFA-120730/LUFA/Common/ArchitectureSpecific.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2012.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *  \brief Architecture specific definitions relating to specific processor architectures.
  33  *
  34  *  \copydetails Group_ArchitectureSpecific
  35  *
  36  *  \note Do not include this file directly, rather include the Common.h header file instead to gain this file's
  37  *        functionality.
  38  */
  39
  40 /** \ingroup Group_Common
  41  *  \defgroup Group_ArchitectureSpecific Architecture Specific Definitions
  42  *  \brief Architecture specific definitions relating to specific processor architectures.
  43  *
  44  *  Architecture specific macros, functions and other definitions, which relate to specific architectures. This
  45  *  definitions may or may not be available in some form on other architectures, and thus should be protected by
  46  *  preprocessor checks in portable code to prevent compile errors.
  47  *
  48  *  @{
  49  */
  50
  51 #ifndef __LUFA_ARCHSPEC_H__
  52 #define __LUFA_ARCHSPEC_H__
  53
  54         /* Preprocessor Checks: */
  55                 #if !defined(__INCLUDE_FROM_COMMON_H)
  56                         #error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality.
  57                 #endif
  58
  59         /* Enable C linkage for C++ Compilers: */
  60                 #if defined(__cplusplus)
  61                         extern "C" {
  62                 #endif
  63
  64         /* Public Interface - May be used in end-application: */
  65                 /* Macros: */
  66                         #if (ARCH == ARCH_AVR8) || (ARCH == ARCH_XMEGA) || defined(__DOXYGEN__)
  67                                 #if (ARCH == ARCH_AVR8) || defined(__DOXYGEN__)
  68                                         /** Re-enables the AVR's JTAG bus in software, until a system reset. This will re-enable JTAG debugging
  69                                          *  interface after is has been disabled in software via \ref JTAG_DISABLE().
  70                                          *
  71                                          *  \note This macro is not available for all architectures.
  72                                          */
  73                                         #define JTAG_ENABLE()                  MACROS{                                      \
  74                                                                                                                                         __asm__ __volatile__ (               \
  75                                                                                                                                         "in __tmp_reg__,__SREG__" "\n\t"     \
  76                                                                                                                                         "cli" "\n\t"                         \
  77                                                                                                                                         "out %1, %0" "\n\t"                  \
  78                                                                                                                                         "out __SREG__, __tmp_reg__" "\n\t"   \
  79                                                                                                                                         "out %1, %0" "\n\t"                  \
  80                                                                                                                                         :                                    \
  81                                                                                                                                         : "r" (MCUCR & ~(1 << JTD)),         \
  82                                                                                                                                           "M" (_SFR_IO_ADDR(MCUCR))          \
  83                                                                                                                                         : "r0");                             \
  84                                                                                                                         }MACROE
  85
  86                                         /** Disables the AVR's JTAG bus in software, until a system reset. This will override the current JTAG
  87                                          *  status as set by the JTAGEN fuse, disabling JTAG debugging and reverting the JTAG pins back to GPIO
  88                                          *  mode.
  89                                          *
  90                                          *  \note This macro is not available for all architectures.
  91                                          */
  92                                         #define JTAG_DISABLE()                  MACROS{                                      \
  93                                                                                                                                         __asm__ __volatile__ (               \
  94                                                                                                                                         "in __tmp_reg__,__SREG__" "\n\t"     \
  95                                                                                                                                         "cli" "\n\t"                         \
  96                                                                                                                                         "out %1, %0" "\n\t"                  \
  97                                                                                                                                         "out __SREG__, __tmp_reg__" "\n\t"   \
  98                                                                                                                                         "out %1, %0" "\n\t"                  \
  99                                                                                                                                         :                                    \
 100                                                                                                                                         : "r" (MCUCR | (1 << JTD)),          \
 101                                                                                                                                           "M" (_SFR_IO_ADDR(MCUCR))          \
 102                                                                                                                                         : "r0");                             \
 103                                                                                                                         }MACROE
 104                                 #endif
 105
 106                                 /** Defines a volatile \c NOP statement which cannot be optimized out by the compiler, and thus can always
 107                                  *  be set as a breakpoint in the resulting code. Useful for debugging purposes, where the optimizer
 108                                  *  removes/reorders code to the point where break points cannot reliably be set.
 109                                  *
 110                                  *  \note This macro is not available for all architectures.
 111                                  */
 112                                 #define JTAG_DEBUG_POINT()              __asm__ __volatile__ ("nop" ::)
 113
 114                                 /** Defines an explicit JTAG break point in the resulting binary via the assembly \c BREAK statement. When
 115                                  *  a JTAG is used, this causes the program execution to halt when reached until manually resumed.
 116                                  *
 117                                  *  \note This macro is not available for all architectures.
 118                                  */
 119                                 #define JTAG_DEBUG_BREAK()              __asm__ __volatile__ ("break" ::)
 120
 121                                 /** Macro for testing condition "x" and breaking via \ref JTAG_DEBUG_BREAK() if the condition is false.
 122                                  *
 123                                  *  \note This macro is not available for all architectures.
 124                                  *
 125                                  *  \param[in] Condition  Condition that will be evaluated.
 126                                 */
 127                                 #define JTAG_ASSERT(Condition)          MACROS{ if (!(Condition)) { JTAG_DEBUG_BREAK(); } }MACROE
 128
 129                                 /** Macro for testing condition \c "x" and writing debug data to the stdout stream if \c false. The stdout stream
 130                                  *  must be pre-initialized before this macro is run and linked to an output device, such as the microcontroller's
 131                                  *  USART peripheral.
 132                                  *
 133                                  *  The output takes the form "{FILENAME}: Function {FUNCTION NAME}, Line {LINE NUMBER}: Assertion {Condition} failed."
 134                                  *
 135                                  *  \note This macro is not available for all architectures.
 136                                  *
 137                                  *  \param[in] Condition  Condition that will be evaluated,
 138                                  */
 139                                 #define STDOUT_ASSERT(Condition)        MACROS{ if (!(x)) {                                             \
 140                                                                                      printf_P(PSTR("%s: Function \"%s\", Line %d: "     \
 141                                                                                                    "Assertion \"%s\" failed.\r\n"),     \
 142                                                                                                    __FILE__, __func__, __LINE__, #Condition); } }MACROE
 143
 144                                 #if !defined(pgm_read_ptr) || defined(__DOXYGEN__)
 145                                         /** Reads a pointer out of PROGMEM space on the AVR8 architecture. This is currently a wrapper for the
 146                                          *  avr-libc \c pgm_read_ptr() macro with a \c void* cast, so that its value can be assigned directly
 147                                          *  to a pointer variable or used in pointer arithmetic without further casting in C. In a future
 148                                          *  avr-libc distribution this will be part of the standard API and will be implemented in a more formal
 149                                          *  manner.
 150                                          *
 151                                          *  \note This macro is not available for all architectures.
 152                                          *
 153                                          *  \param[in] Address  Address of the pointer to read.
 154                                          *
 155                                          *  \return Pointer retrieved from PROGMEM space.
 156                                          */
 157                                         #define pgm_read_ptr(Address)        (void*)pgm_read_word(Address)
 158                                 #endif
 159                         #elif (ARCH == ARCH_UC3)
 160                                 #define JTAG_DEBUG_POINT()              __asm__ __volatile__ ("nop" ::)
 161                                 #define JTAG_DEBUG_BREAK()              __asm__ __volatile__ ("breakpoint" ::)
 162                                 #define JTAG_ASSERT(Condition)          MACROS{ if (!(Condition)) { JTAG_DEBUG_BREAK(); } }MACROE
 163                                 #define STDOUT_ASSERT(Condition)        MACROS{ if (!(x)) {                                      \
 164                                                                                      printf("%s: Function \"%s\", Line %d: "     \
 165                                                                                             "Assertion \"%s\" failed.\r\n"),     \
 166                                                                                             __FILE__, __func__, __LINE__, #Condition); } }MACROE
 167                         #endif
 168
 169         /* Disable C linkage for C++ Compilers: */
 170                 #if defined(__cplusplus)
 171                         }
 172                 #endif
 173
 174 #endif
 175
 176 /** @} */
 177