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/** \file
*
* This file contains special DoxyGen information for the generation of the main page and other special
* documentation pages. It is not a project source file.
*/
/** \page Page_BuildSystem The LUFA Build System
*
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* \section Sec_BuildSystem_Overview Overview of the LUFA Build System
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* The LUFA build system is an attempt at making a set of re-usable, modular build make files which
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* can be referenced in a LUFA powered project, to minimize the amount of code required in an
* application makefile. The system is written in GNU Make, and each module is independent of
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* one-another.
*
* For details on the prerequisites needed for Linux and Windows machines to be able to use the LUFA
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* build system, see \ref Sec_CompilingApps_Prerequisites.
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*
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* To use a LUFA build system module, simply add an include to your project makefile. All user projects
* should at a minimum include \ref Page_BuildModule_CORE for base functionality:
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* \code
* include $(LUFA_PATH)/Build/lufa_core.mk
* \endcode
*
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* Once included in your project makefile, the associated build module targets will be added to your
* project's build makefile targets automatically. To call a build target, run <tt>make {TARGET_NAME}</tt>
* from the command line, substituting in the appropriate target name.
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*
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* \see \ref Sec_ConfiguringApps_AppMakefileParams for a copy of the sample LUFA project makefile.
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*
* Each build module may have one or more mandatory parameters (GNU Make variables) which <i>must</i>
* be supplied in the project makefile for the module to work, and one or more optional parameters which
* may be defined and which will assume a sensible default if not.
*
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* \section SSec_BuildSystem_Modules Available Modules
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*
* The following modules are included in this LUFA release:
*
* \li \subpage Page_BuildModule_ATPROGRAM - Device Programming
* \li \subpage Page_BuildModule_AVRDUDE - Device Programming
* \li \subpage Page_BuildModule_BUILD - Compiling/Assembling/Linking
* \li \subpage Page_BuildModule_CORE - Core Build System Functions
* \li \subpage Page_BuildModule_CPPCHECK - Static Code Analysis
* \li \subpage Page_BuildModule_DFU - Device Programming
* \li \subpage Page_BuildModule_DOXYGEN - Automated Source Code Documentation
* \li \subpage Page_BuildModule_HID - Device Programming
* \li \subpage Page_BuildModule_SOURCES - LUFA Module Source Code Variables
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*
* If you have problems building using the LUFA build system, see \subpage Page_BuildTroubleshooting for resolution steps.
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*/
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/** \page Page_BuildModule_BUILD The BUILD build module
*
* The BUILD LUFA build system module, providing targets for the compilation,
* assembling and linking of an application from source code into binary files
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* suitable for programming into a target device, using the GCC compiler.
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*
* To use this module in your application makefile, add the following code:
* \code
* include $(LUFA_PATH)/Build/lufa_build.mk
* \endcode
*
* \section SSec_BuildModule_BUILD_Requirements Requirements
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* This module requires the the architecture appropriate binaries of the GCC compiler are available in your
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* system's <b>PATH</b> variable. The GCC compiler and associated toolchain is distributed in Atmel AVR Studio
* 5.x and Atmel Studio 6.x installation directories, as well as in many third party distribution packages.
*
* \section SSec_BuildModule_BUILD_Targets Targets
*
* <table>
* <tr>
* <td><tt>size</tt></td>
* <td>Display size of the compiled application FLASH and SRAM segments.</td>
* </tr>
* <tr>
* <td><tt>symbol-sizes</tt></td>
* <td>Display a size-sorted list of symbols from the compiled application, in decimal bytes.</td>
* </tr>
* <tr>
* <td><tt>lib</tt></td>
* <td>Build and archive all source files into a library A binary file.</td>
* </tr>
* <tr>
* <td><tt>all</tt></td>
* <td>Build and link the application into ELF debug and HEX binary files.</td>
* </tr>
* <tr>
* <td><tt>elf</tt></td>
* <td>Build and link the application into an ELF debug file.</td>
* </tr>
* <tr>
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* <td><tt>bin</tt></td>
* <td>Build and link the application and produce a BIN binary file.</td>
* </tr>
* <tr>
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* <td><tt>hex</tt></td>
* <td>Build and link the application and produce HEX and EEP binary files.</td>
* </tr>
* <tr>
* <td><tt>lss</tt></td>
* <td>Build and link the application and produce a LSS source code/assembly code mixed listing file.</td>
* </tr>
* <tr>
* <td><tt>clean</tt></td>
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* <td>Remove all intermediary files and binary output files.</td>
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* </tr>
* <tr>
* <td><tt>mostlyclean</tt></td>
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* <td>Remove all intermediary files but preserve any binary output files.</td>
* </tr>
* <tr>
* <td><tt><i><filename></i>.s</tt></td>
* <td>Create an assembly listing of a given input C/C++ source file.</td>
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* </tr>
* </table>
*
* \section SSec_BuildModule_BUILD_MandatoryParams Mandatory Parameters
*
* <table>
* <tr>
* <td><tt>TARGET</tt></td>
* <td>Name of the application output file prefix (e.g. <tt>TestApplication</tt>).</td>
* </tr>
* <tr>
* <td><tt>ARCH</tt></td>
* <td>Architecture of the target processor (see \ref Page_DeviceSupport).</td>
* </tr>
* <tr>
* <td><tt>MCU</tt></td>
* <td>Name of the Atmel processor model (e.g. <tt>at90usb1287</tt>).</td>
* </tr>
* <tr>
* <td><tt>SRC</tt></td>
* <td>List of relative or absolute paths to the application C (.c), C++ (.cpp) and Assembly (.S) source files.</td>
* </tr>
* <tr>
* <td><tt>F_USB</tt></td>
* <td>Speed in Hz of the input clock frequency to the target's USB controller.</td>
* </tr>
* <tr>
* <td><tt>LUFA_PATH</tt></td>
* <td>Path to the LUFA library core, either relative or absolute (e.g. <tt>../LUFA-000000/LUFA/</tt>).</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_BUILD_OptionalParams Optional Parameters
*
* <table>
* <tr>
* <td><tt>BOARD</tt></td>
* <td>LUFA board hardware drivers to use (see \ref Page_DeviceSupport).</td>
* </tr>
* <tr>
* <td><tt>OPTIMIZATION</tt></td>
* <td>Optimization level to use when compiling source files (see GCC manual).</td>
* </tr>
* <tr>
* <td><tt>C_STANDARD</tt></td>
* <td>Version of the C standard to apply when compiling C++ source files (see GCC manual).</td>
* </tr>
* <tr>
* <td><tt>CPP_STANDARD</tt></td>
* <td>Version of the C++ standard to apply when compiling C++ source files (see GCC manual).</td>
* </tr>
* <tr>
* <td><tt>DEBUG_FORMAT</tt></td>
* <td>Format of the debug information to embed in the generated object files (see GCC manual).</td>
* </tr>
* <tr>
* <td><tt>DEBUG_LEVEL</tt></td>
* <td>Level of the debugging information to embed in the generated object files (see GCC manual).</td>
* </tr>
* <tr>
* <td><tt>F_CPU</tt></td>
* <td>Speed of the processor CPU clock, in Hz.</td>
* </tr>
* <tr>
* <td><tt>C_FLAGS</tt></td>
* <td>Flags to pass to the C compiler only, after the automatically generated flags.</td>
* </tr>
* <tr>
* <td><tt>CPP_FLAGS</tt></td>
* <td>Flags to pass to the C++ compiler only, after the automatically generated flags.</td>
* </tr>
* <tr>
* <td><tt>ASM_FLAGS</tt></td>
* <td>Flags to pass to the assembler only, after the automatically generated flags.</td>
* </tr>
* <tr>
* <td><tt>CC_FLAGS</tt></td>
* <td>Common flags to pass to the C/C++ compiler and assembler, after the automatically generated flags.</td>
* </tr>
* <tr>
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* <td><tt>COMPILER_PATH</tt></td>
* <td>Directory where the C/C++ toolchain is located, if not available in the system <tt>PATH</tt>.</td>
* </tr>
* <tr>
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* <td><tt>LD_FLAGS</tt></td>
* <td>Flags to pass to the linker, after the automatically generated flags.</td>
* </tr>
* <tr>
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* <td><tt>LINKER_RELAXATIONS</tt></td>
* <td>Enables or disables linker relaxations when linking the application binary. This can reduce the total size
* of the application by replacing full \c CALL instructions with smaller \c RCALL instructions where possible.
* \note On some unpatched versions of binutils, this can cause link failures in some circumstances. If you
* receive a link error <tt>relocation truncated to fit: R_AVR_13_PCREL</tt>, disable this setting.</td>
* </tr>
* <tr>
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* <td><tt>OBJDIR</tt></td>
* <td>Directory to place the generated object and dependency files. If set to "." the same folder as the source file will be used.
* \note When this option is enabled, all source filenames <b>must</b> be unique.</td>
* </tr>
* <tr>
* <td><tt>OBJECT_FILES</tt></td>
* <td>List of additional object files that should be linked into the resulting binary.</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_BUILD_ProvidedVariables Module Provided Variables
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
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* </table>
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*
* \section SSec_BuildModule_BUILD_ProvidedMacros Module Provided Macros
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*/
/** \page Page_BuildModule_CORE The CORE build module
*
* The core LUFA build system module, providing common build system help and information targets.
*
* To use this module in your application makefile, add the following code:
* \code
* include $(LUFA_PATH)/Build/lufa_core.mk
* \endcode
*
* \section SSec_BuildModule_CORE_Requirements Requirements
* This module has no requirements outside a standard *nix shell like environment; the <tt>sh</tt>
* shell, GNU <tt>make</tt> and *nix CoreUtils (<tt>echo</tt>, <tt>printf</tt>, etc.).
*
* \section SSec_BuildModule_CORE_Targets Targets
*
* <table>
* <tr>
* <td><tt>help</tt></td>
* <td>Display build system help and configuration information.</td>
* </tr>
* <tr>
* <td><tt>list_targets</tt></td>
* <td>List all available build targets from the build system.</td>
* </tr>
* <tr>
* <td><tt>list_modules</tt></td>
* <td>List all available build modules from the build system.</td>
* </tr>
* <tr>
* <td><tt>list_mandatory</tt></td>
* <td>List all mandatory parameters required by the included modules.</td>
* </tr>
* <tr>
* <td><tt>list_optional</tt></td>
* <td>List all optional parameters required by the included modules.</td>
* </tr>
* <tr>
* <td><tt>list_provided</tt></td>
* <td>List all variables provided by the included modules.</td>
* </tr>
* <tr>
* <td><tt>list_macros</tt></td>
* <td>List all macros provided by the included modules.</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_CORE_MandatoryParams Mandatory Parameters
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*
* \section SSec_BuildModule_CORE_OptionalParams Optional Parameters
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*
* \section SSec_BuildModule_CORE_ProvidedVariables Module Provided Variables
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
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* </table>
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*
* \section SSec_BuildModule_CORE_ProvidedMacros Module Provided Macros
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*/
/** \page Page_BuildModule_ATPROGRAM The ATPROGRAM build module
*
* The ATPROGRAM programming utility LUFA build system module, providing targets to reprogram an
* Atmel processor FLASH and EEPROM memories with a project's compiled binary output files.
*
* To use this module in your application makefile, add the following code:
* \code
* include $(LUFA_PATH)/Build/lufa_atprogram.mk
* \endcode
*
* \section SSec_BuildModule_ATPROGRAM_Requirements Requirements
* This module requires the <tt>atprogram.exe</tt> utility to be available in your system's <b>PATH</b>
* variable. The <tt>atprogram.exe</tt> utility is distributed in Atmel AVR Studio 5.x and Atmel Studio 6.x
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* inside the application install folder's "\atbackend" subdirectory.
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*
* \section SSec_BuildModule_ATPROGRAM_Targets Targets
*
* <table>
* <tr>
* <td><tt>atprogram</tt></td>
* <td>Program the device FLASH memory with the application's executable data.</td>
* </tr>
* <tr>
* <td><tt>atprogram-ee</tt></td>
* <td>Program the device EEPROM memory with the application's EEPROM data.</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_ATPROGRAM_MandatoryParams Mandatory Parameters
*
* <table>
* <tr>
* <td><tt>MCU</tt></td>
* <td>Name of the Atmel processor model (e.g. <tt>at90usb1287</tt>).</td>
* </tr>
* <tr>
* <td><tt>TARGET</tt></td>
* <td>Name of the application output file prefix (e.g. <tt>TestApplication</tt>).</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_ATPROGRAM_OptionalParams Optional Parameters
*
* <table>
* <tr>
* <td><tt>ATPROGRAM_PROGRAMMER</tt></td>
* <td>Name of the Atmel programmer or debugger tool to communicate with (e.g. <tt>jtagice3</tt>).</td>
* </tr>
* <tr>
* <td><tt>ATPROGRAM_INTERFACE</tt></td>
* <td>Name of the programming interface to use when programming the target (e.g. <tt>spi</tt>).</td>
* </tr>
* <tr>
* <td><tt>ATPROGRAM_PORT</tt></td>
* <td>Name of the communication port to use when when programming with a serially connected tool (e.g. <tt>COM2</tt>).</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_ATPROGRAM_ProvidedVariables Module Provided Variables
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
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* </table>
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*
* \section SSec_BuildModule_ATPROGRAM_ProvidedMacros Module Provided Macros
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*/
/** \page Page_BuildModule_AVRDUDE The AVRDUDE build module
*
* The AVRDUDE programming utility LUFA build system module, providing targets to reprogram an
* Atmel processor FLASH and EEPROM memories with a project's compiled binary output files.
*
* To use this module in your application makefile, add the following code:
* \code
* include $(LUFA_PATH)/Build/lufa_avrdude.mk
* \endcode
*
* \section SSec_BuildModule_AVRDUDE_Requirements Requirements
* This module requires the <tt>avrdude</tt> utility to be available in your system's <b>PATH</b>
* variable. The <tt>avrdude</tt> utility is distributed in the old WinAVR project releases for
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* Windows (<a>http://winavr.sourceforge.net</a>) or can be installed on *nix systems via the project's
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* source code (<a>https://savannah.nongnu.org/projects/avrdude</a>) or through the package manager.
*
* \section SSec_BuildModule_AVRDUDE_Targets Targets
*
* <table>
* <tr>
* <td><tt>avrdude</tt></td>
* <td>Program the device FLASH memory with the application's executable data.</td>
* </tr>
* <tr>
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* <td><tt>avrdude-ee</tt></td>
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* <td>Program the device EEPROM memory with the application's EEPROM data.</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_AVRDUDE_MandatoryParams Mandatory Parameters
*
* <table>
* <tr>
* <td><tt>MCU</tt></td>
* <td>Name of the Atmel processor model (e.g. <tt>at90usb1287</tt>).</td>
* </tr>
* <tr>
* <td><tt>TARGET</tt></td>
* <td>Name of the application output file prefix (e.g. <tt>TestApplication</tt>).</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_AVRDUDE_OptionalParams Optional Parameters
*
* <table>
* <tr>
* <td><tt>AVRDUDE_PROGRAMMER</tt></td>
* <td>Name of the programmer or debugger tool to communicate with (e.g. <tt>jtagicemkii</tt>).</td>
* </tr>
* <tr>
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* <td><tt>AVRDUDE_PORT</tt></td>
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* <td>Name of the communication port to use when when programming with the connected tool (e.g. <tt>COM2</tt>, <tt>/dev/ttyUSB0</tt> or <tt>usb</tt>).</td>
* </tr>
* <tr>
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* <td><tt>AVRDUDE_FLAGS</tt></td>
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* <td>Additional flags to pass to avrdude when programming, applied after the automatically generated flags.</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_AVRDUDE_ProvidedVariables Module Provided Variables
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
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* </table>
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*
* \section SSec_BuildModule_AVRDUDE_ProvidedMacros Module Provided Macros
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*/
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/** \page Page_BuildModule_CPPCHECK The CPPCHECK build module
*
* The CPPCHECK programming utility LUFA build system module, providing targets to statically
* analyze C and C++ source code for errors and performance/style issues.
*
* To use this module in your application makefile, add the following code:
* \code
* include $(LUFA_PATH)/Build/lufa_cppcheck.mk
* \endcode
*
* \section SSec_BuildModule_CPPCHECK_Requirements Requirements
* This module requires the <tt>cppcheck</tt> utility to be available in your system's <b>PATH</b>
* variable. The <tt>cppcheck</tt> utility is distributed through the project's home page
* (<a>http://cppcheck.sourceforge.net</a>) for Windows, and can be installed on *nix systems via
* the project's source code or through the package manager.
*
* \section SSec_BuildModule_CPPCHECK_Targets Targets
*
* <table>
* <tr>
* <td><tt>cppcheck</tt></td>
* <td>Statically analyze the project source code for issues.</td>
* </tr>
* <tr>
* <td><tt>cppcheck-config</tt></td>
* <td>Check the <tt>cppcheck</tt> configuration - scan source code and warn about missing header files and other issues.</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_CPPCHECK_MandatoryParams Mandatory Parameters
*
* <table>
* <tr>
* <td><tt>SRC</tt></td>
* <td>List of source files to statically analyze.</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_CPPCHECK_OptionalParams Optional Parameters
*
* <table>
* <tr>
* <td><tt>CPPCHECK_INCLUDES</tt></td>
* <td>Path of extra directories to check when attemting to resolve C/C++ header file includes.</td>
* </tr>
* <tr>
* <td><tt>CPPCHECK_EXCLUDES</tt></td>
* <td>Paths or path fragments to exclude when analyzing.</td>
* </tr>
* <tr>
* <td><tt>CPPCHECK_MSG_TEMPLATE</tt></td>
* <td>Output message template to use when printing errors, warnings and information (see <tt>cppcheck</tt> documentation).</td>
* </tr>
* <tr>
* <td><tt>CPPCHECK_ENABLE</tt></td>
* <td>Analysis rule categories to enable (see <tt>cppcheck</tt> documentation).</td>
* </tr>
* <tr>
* <td><tt>CPPCHECK_SUPPRESS</tt></td>
* <td>Specific analysis rules to suppress (see <tt>cppcheck</tt> documentation).</td>
* </tr>
* <tr>
* <td><tt>CPPCHECK_FAIL_ON_WARNING</tt></td>
* <td>Set to <b>Y</b> to fail the analysis job with an error exit code if warnings are found, <b>N</b> to continue without failing.</td>
* </tr>
* <tr>
* <td><tt>CPPCHECK_QUIET</tt></td>
* <td>Set to <b>Y</b> to suppress all output except warnings and errors, <b>N</b> to show verbose output information.</td>
* </tr>
* <tr>
* <td><tt>CPPCHECK_FLAGS</tt></td>
* <td>Extra flags to pass to <tt>cppcheck</tt>, after the automatically generated flags.</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_CPPCHECK_ProvidedVariables Module Provided Variables
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
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* </table>
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*
* \section SSec_BuildModule_CPPCHECK_ProvidedMacros Module Provided Macros
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*/
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/** \page Page_BuildModule_DFU The DFU build module
*
* The DFU programming utility LUFA build system module, providing targets to reprogram an
* Atmel processor FLASH and EEPROM memories with a project's compiled binary output files.
* This module requires a DFU class bootloader to be running in the target, compatible with
* the DFU bootloader protocol as published by Atmel.
*
* To use this module in your application makefile, add the following code:
* \code
* include $(LUFA_PATH)/Build/lufa_dfu.mk
* \endcode
*
* \section SSec_BuildModule_DFU_Requirements Requirements
* This module requires either the <tt>batchisp</tt> utility from Atmel's FLIP utility, or the open
* source <tt>dfu-programmer</tt> utility (<a>http://dfu-programmer.sourceforge.net/</a>) to be
* available in your system's <b>PATH</b> variable. On *nix systems the <tt>dfu-programmer</tt> utility
* can be installed via the project's source code or through the package manager.
*
* \section SSec_BuildModule_DFU_Targets Targets
*
* <table>
* <tr>
* <td><tt>dfu</tt></td>
* <td>Program the device FLASH memory with the application's executable data using <tt>dfu-programmer</tt>.</td>
* </tr>
* <tr>
* <td><tt>dfu-ee</tt></td>
* <td>Program the device EEPROM memory with the application's EEPROM data using <tt>dfu-programmer</tt>.</td>
* </tr>
* <tr>
* <td><tt>flip</tt></td>
* <td>Program the device FLASH memory with the application's executable data using <tt>batchisp</tt>.</td>
* </tr>
* <tr>
* <td><tt>flip-ee</tt></td>
* <td>Program the device EEPROM memory with the application's EEPROM data using <tt>batchisp</tt>.</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_DFU_MandatoryParams Mandatory Parameters
*
* <table>
* <tr>
* <td><tt>MCU</tt></td>
* <td>Name of the Atmel processor model (e.g. <tt>at90usb1287</tt>).</td>
* </tr>
* <tr>
* <td><tt>TARGET</tt></td>
* <td>Name of the application output file prefix (e.g. <tt>TestApplication</tt>).</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_DFU_OptionalParams Optional Parameters
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*
* \section SSec_BuildModule_DFU_ProvidedVariables Module Provided Variables
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
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* </table>
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*
* \section SSec_BuildModule_DFU_ProvidedMacros Module Provided Macros
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*/
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/** \page Page_BuildModule_DOXYGEN The DOXYGEN build module
*
* The DOXYGEN code documentation utility LUFA build system module, providing targets to generate
* project HTML and other format documentation from a set of source files that include special
* Doxygen comments.
*
* To use this module in your application makefile, add the following code:
* \code
* include $(LUFA_PATH)/Build/lufa_doxygen.mk
* \endcode
*
* \section SSec_BuildModule_DOXYGEN_Requirements Requirements
* This module requires the <tt>doxygen</tt> utility from the Doxygen website
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* (<a>http://www.doxygen.org/</a>) to be available in your system's <b>PATH</b> variable. On *nix
* systems the <tt>doxygen</tt> utility can be installed via the project's source code or through
* the package manager.
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*
* \section SSec_BuildModule_DOXYGEN_Targets Targets
*
* <table>
* <tr>
* <td><tt>doxygen</tt></td>
* <td>Generate project documentation.</td>
* </tr>
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* <tr>
* <td><tt>doxygen_create</tt></td>
* <td>Create a new Doxygen configuration file using the latest template.</td>
* </tr>
* <tr>
* <td><tt>doxygen_upgrade</tt></td>
* <td>Upgrade an existing Doxygen configuration file to the latest template</td>
* </tr>
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* </table>
*
* \section SSec_BuildModule_DOXYGEN_MandatoryParams Mandatory Parameters
*
* <table>
* <tr>
* <td><tt>LUFA_PATH</tt></td>
* <td>Path to the LUFA library core, either relative or absolute (e.g. <tt>../LUFA-000000/LUFA/</tt>).</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_DOXYGEN_OptionalParams Optional Parameters
*
* <table>
* <tr>
* <td><tt>DOXYGEN_CONF</tt></td>
* <td>Name and path of the base Doxygen configuration file for the project.</td>
* </tr>
* <tr>
* <td><tt>DOXYGEN_FAIL_ON_WARNING</tt></td>
* <td>Set to <b>Y</b> to fail the generation with an error exit code if warnings are found other than unsupported configuration parameters, <b>N</b> to continue without failing.</td>
* </tr>
* <tr>
* <td><tt>DOXYGEN_OVERRIDE_PARAMS</tt></td>
* <td>Extra Doxygen configuration parameters to apply, overriding the corresponding config entry in the project's configuration file (e.g. <tt>QUIET=YES</tt>).</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_DOXYGEN_ProvidedVariables Module Provided Variables
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
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* </table>
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*
* \section SSec_BuildModule_DOXYGEN_ProvidedMacros Module Provided Macros
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*/
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/** \page Page_BuildModule_HID The HID build module
*
* The HID programming utility LUFA build system module, providing targets to reprogram an
* Atmel processor's FLASH memory with a project's compiled binary output file. This module
* requires a HID class bootloader to be running in the target, using a protocol compatible
* with the PJRC "HalfKay" protocol (<a>http://www.pjrc.com/teensy/halfkay_protocol.html</a>).
*
* To use this module in your application makefile, add the following code:
* \code
* include $(LUFA_PATH)/Build/lufa_hid.mk
* \endcode
*
* \section SSec_BuildModule_HID_Requirements Requirements
* This module requires either the <tt>hid_bootloader_cli</tt> utility from the included LUFA HID
* class bootloader API subdirectory, or the <tt>teensy_loader_cli</tt> utility from PJRC
* (<a>http://www.pjrc.com/teensy/loader_cli.html</a>) to be available in your system's <b>PATH</b>
* variable.
*
* \section SSec_BuildModule_HID_Targets Targets
*
* <table>
* <tr>
* <td><tt>hid</tt></td>
* <td>Program the device FLASH memory with the application's executable data using <tt>hid_bootloader_cli</tt>.</td>
* </tr>
* <tr>
* <td><tt>hid-ee</tt></td>
* <td>Program the device EEPROM memory with the application's EEPROM data using <tt>hid_bootloader_cli</tt> and
* a temporary AVR application programmed into the target's FLASH.
* \note This will erase the currently loaded application in the target.</td>
* </tr>
* <tr>
* <td><tt>teensy</tt></td>
* <td>Program the device FLASH memory with the application's executable data using <tt>teensy_loader_cli</tt>.</td>
* </tr>
* <tr>
* <td><tt>teensy-ee</tt></td>
* <td>Program the device EEPROM memory with the application's EEPROM data using <tt>teensy_loader_cli</tt> and
* a temporary AVR application programmed into the target's FLASH.
* \note This will erase the currently loaded application in the target.</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_HID_MandatoryParams Mandatory Parameters
*
* <table>
* <tr>
* <td><tt>MCU</tt></td>
* <td>Name of the Atmel processor model (e.g. <tt>at90usb1287</tt>).</td>
* </tr>
* <tr>
* <td><tt>TARGET</tt></td>
* <td>Name of the application output file prefix (e.g. <tt>TestApplication</tt>).</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_HID_OptionalParams Optional Parameters
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*
* \section SSec_BuildModule_HID_ProvidedVariables Module Provided Variables
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
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* </table>
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*
* \section SSec_BuildModule_HID_ProvidedMacros Module Provided Macros
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*/
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/** \page Page_BuildModule_SOURCES The SOURCES build module
*
* The SOURCES LUFA build system module, providing variables listing the various LUFA source files
* required to be build by a project for a given LUFA module. This module gives a way to reference
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* LUFA source files symbolically, so that changes to the library structure do not break the library
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* makefile.
*
* To use this module in your application makefile, add the following code:
* \code
* include $(LUFA_PATH)/Build/lufa_sources.mk
* \endcode
*
* \section SSec_BuildModule_SOURCES_Requirements Requirements
* None.
*
* \section SSec_BuildModule_SOURCES_Targets Targets
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*
* \section SSec_BuildModule_SOURCES_MandatoryParams Mandatory Parameters
*
* <table>
* <tr>
* <td><tt>LUFA_PATH</tt></td>
* <td>Path to the LUFA library core, either relative or absolute (e.g. <tt>../LUFA-000000/LUFA/</tt>).</td>
* </tr>
* <tr>
* <td><tt>ARCH</tt></td>
* <td>Architecture of the target processor (see \ref Page_DeviceSupport).</td>
* </tr>
* </table>
*
* \section SSec_BuildModule_SOURCES_OptionalParams Optional Parameters
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*
* \section SSec_BuildModule_SOURCES_ProvidedVariables Module Provided Variables
*
* <table>
* <tr>
* <td><tt>LUFA_SRC_USB</tt></td>
* <td>List of LUFA USB driver source files.</td>
* </tr>
* <tr>
* <td><tt>LUFA_SRC_USBCLASS</tt></td>
* <td>List of LUFA USB Class driver source files.</td>
* </tr>
* <tr>
* <td><tt>LUFA_SRC_TEMPERATURE</tt></td>
* <td>List of LUFA temperature sensor driver source files.</td>
* </tr>
* <tr>
* <td><tt>LUFA_SRC_SERIAL</tt></td>
* <td>List of LUFA Serial U(S)ART driver source files.</td>
* </tr>
* <tr>
* <td><tt>LUFA_SRC_TWI</tt></td>
* <td>List of LUFA TWI driver source files.</td>
* </tr>
* <tr>
* <td><tt>LUFA_SRC_PLATFORM</tt></td>
* <td>List of LUFA architecture specific platform management source files.</td>
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* </tr>
* </table>
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*
* \section SSec_BuildModule_SOURCES_ProvidedMacros Module Provided Macros
*
* <table>
* <tr>
* <td><i>None</i></td>
* </tr>
* </table>
*/
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/** \page Page_BuildTroubleshooting Troubleshooting Information
*
* LUFA uses a lot of advanced features of the AVR-GCC compiler, linker, and surrounding binaries. This can sometimes lead to problems compiling applications if one of these
* features is buggy in the version of the tools used in a build environment. Missing utilities and incorrectly set makefile configuration options can also result in different
* errors being produced when compilation or other operations are attempted. The table below lists a set of commonly encountered errors and their resolutions.
*
* <table>
* <tr>
* <th>Problem</th>
* <th>Resolution</th>
* </tr>
* <tr>
* <td>Error "<b><tt>relocation truncated to fit: R_AVR_13_PCREL against symbol <i>{X}</i></tt></b>" shown when compiling.</td>
* <td>Try compiling with the setting <tt>LINKER_RELAXATIONS=N</tt> in your LUFA Build System 2.0 makefile, or remove the line <tt>-Wl,--relax</tt>
* from other makefiles. Alternatively, make sure you have the latest version of the Atmel Toolchain installed for your system.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>error: ld terminated with signal 11 [Segmentation fault]</tt></b>" shown when compiling.</td>
* <td>Try compiling with the setting <tt>DEBUG_LEVEL=2</tt> in your LUFA Build System 2.0 makefile, or make sure you are using <tt>binutils</tt> version 2.22 or later.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>EMERGENCY ABORT: INFINITE RECURSION DETECTED</tt></b>" shown when compiling.</td>
* <td>Make sure you are using an up to date version of GNU Make when compiling. This error is a safety system added to the mid-level makefiles, to prevent an issue with
* GNU make or other variants of Make causing an infinitely recursive build.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>Unsupported architecture "<i>{X}</i>"</tt></b>" shown when compiling.</td>
* <td>Ensure your makefile's <tt>ARCH</tt> setting is set to one of the architecture names (case-sensitive) supported by the version of LUFA you are compiling against.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>Makefile <i>{X}</i> value not set</tt></b>" shown when compiling.</td>
* <td>The specified Makefile value was not configured in your project's makefile or on the command line, and the nominated setting is required by one or more LUFA
* build system modules. Define the value in your project makefile and try again.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>Makefile <i>{X}</i> option cannot be blank</tt></b>" shown when compiling.</td>
* <td>The specified Makefile value was configured in your project's makefile or on the command line, but was set to an empty value. For the nominated configuration
* option, an empty value is not allowed. Define the nominated setting to a correct non-blank value and try again.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>Makefile <i>{X}</i> option must be Y or N</tt></b>" shown when compiling.</td>
* <td>The specified Makefile value was configured in your project's makefile or on the command line, but was set to a value other than a Y (for "Yes") or "N" (for "No").
* This configuration option is required to be one of the aforementioned boolean values, and other values are invalid. Set this option to either Y or N and try again.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>Unknown input source file formats: <i>{X}</i></tt></b>" shown when compiling.</td>
* <td>The nominated source files, specified in your project's makefile in the <tt>SRC</tt> configuration option, has an extension that the LUFA build system does not
* recognise. The file extensions are case sensitive, and must be one of the supported formats (<tt>*.c</tt>, <tt>*.cpp</tt> or <tt>*.S</tt>).</td>
* </tr>
* <tr>
* <td>Error "<b><tt>Cannot build with OBJDIR parameter set - one or more object file name is not unique</tt></b>" shown when compiling.</td>
* <td>When a project is built with a non-empty <tt>OBJDIR</tt> object directory name set, all input source files must have unique names, excluding extension and path.
* This means that input files that are named identically and differ only by their path or extension are invalid when this mode is used.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>Source file does not exist: <i>{X}</i></tt></b>" shown when compiling.</td>
* <td>The nominated input source file, specified in the user project's <tt>SRC</tt> parameter, could not be found. Ensure the source file exists and the absolute or
* relative path given in the user project makefile is correct and try again.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>Doxygen configuration file <i>{X}</i> does not exist</tt></b>" shown when upgrading a Doxygen configuration file.</td>
* <td>The nominated Doxygen configuration file, specified in the user project's <tt>DOXYGEN_CONF</tt> parameter, could not be found. Ensure the configuration file exists
* and the absolute or relative path given in the user project makefile is correct and try again, or run the appropriate makefile target to generate a new configuration
* file.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>avr-gcc: error: unrecognized option '<i>{X}</i>'</tt></b>" shown when compiling.</td>
* <td>An unrecognised option was supplied to the compiler, usually in the <tt>C_FLAGS</tt>, <tt>CPP_FLAGS</tt>, <tt>ASM_FLAGS</tt> or <tt>CC_FLAGS</tt> configuration
* options. The nominated compiler switch may be invalid, or unsupported by the version of AVR-GCC on the host system. Remove the unrecognised flag if invalid, or
* upgrade to the latest AVR-GCC. If the option is a valid linker option, use the prefix "-Wl," to ensure it is passed to the linker correctly.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>makefile:{X}: {Y}.mk: No such file or directory</tt></b>" shown when make is invoked.</td>
* <td>The path to the nominated makefile module was incorrect. This usually indicates that the makefile <tt>LUFA_PATH</tt> option is not set to a valid relative or
* absolute path to the LUFA library core.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>fatal error: LUFAConfig.h: No such file or directory</tt></b>" shown when compiling.</td>
* <td>The <tt>USE_LUFA_CONFIG_HEADER</tt> compile time option was set in the user project makefile, but the user supplied <tt>LUFAConfig.h</tt> header could not be
* found. Ensure that the directory that contains this configuration file is correctly passed to the compiler via the -I switch in the makefile <tt>CC_FLAGS</tt>
* parameter.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>ld.exe: section .apitable_trampolines loaded at <i>{X}</i> overlaps section .text</tt></b>" shown when compiling a bootloader.</td>
* <td>The bootloader is compiling too large for the given <tt>FLASH_SIZE_KB</tt> and <tt>BOOT_SECTION_SIZE_KB</tt> parameters set in the bootloader makefile. This
* usually indicates that these values are incorrect for the specified device the bootloader is targeting. If these values are correct, a newer version of the
* compiler may need to be used to ensure that the bootloader is built within the section size constraints of the target device.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>unknown MCU '<i>{X}</i>' specified</tt></b>" shown when compiling.</td>
* <td>The specified microcontroller device model name set in the user application's makefile as the <tt>MCU</tt> parameter is incorrect, or unsupported by the
* version of the compiler being used. Make sure the model name is correct, or upgrade to the latest Atmel Toolchain to obtain newer device support.</td>
* </tr>
* <tr>
* <td>Error "<b><tt>undefined reference to `<i>{X}</i>'</tt></b>" shown when compiling.</td>
* <td>This is usually caused by a missing source file in the user application's <tt>SRC</tt> configuration parameter. If the indicated symbol is one from the LUFA
* library, you may be missing a LUFA source makefile module (see \ref Page_BuildModule_SOURCES).</td>
* </tr>
* </table>
*
* For troubleshooting other errors you encounter, please see \ref Sec_ProjectHelp.
*/
