Board-Specific Configurations ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Table of Contents ^^^^^^^^^^^^^^^^^ o Board-Specific Configurations o Summary of Files o Supported Architectures o Configuring NuttX o Building Symbol Tables Board-Specific Configurations ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The NuttX configuration consists of: o Processor architecture specific files. These are the files contained in the arch// directory. o Chip/SoC specific files. Each processor processor architecture is embedded in chip or System-on-a-Chip (SoC) architecture. The full chip architecture includes the processor architecture plus chip-specific interrupt logic, general purpose I/O (GIO) logic, and specialized, internal peripherals (such as UARTs, USB, etc.). These chip-specific files are contained within chip-specific sub-directories in the arch// directory and are selected via the CONFIG_ARCH_name selection o Board specific files. In order to be usable, the chip must be contained in a board environment. The board configuration defines additional properties of the board including such things as peripheral LEDs, external peripherals (such as network, USB, etc.). These board-specific configuration files can be found in the configs// sub-directories and are discussed in this README. Additional configuration information maybe available in board-specific configs//README.txt files. The configs/ subdirectory contains configuration data for each board. These board-specific configurations plus the architecture-specific configurations in the arch/ subdirectory completely define a customized port of NuttX. Directory Structure ^^^^^^^^^^^^^^^^^^^ The configs directory contains board specific configurationlogic. Each board must provide a subdirectory under configs/ with the following characteristics: |-- README.txt |-- include/ | `-- (board-specific header files) |-- src/ | |-- Makefile | `-- (board-specific source files) |-- | |-- Make.defs | |-- defconfig | |-- appconfig* | `-- setenv.sh |-- | |-- Make.defs | |-- defconfig | |-- appconfig* | `-- setenv.sh ... *optional Summary of Files ^^^^^^^^^^^^^^^^ README.txt -- This text file provides additional information unique to each board configuration sub-directory. include/ -- This directory contains board specific header files. This directory will be linked as include/arch/board at configuration time and can be included via '#include '. These header file can only be included by files in arch/include/ and arch//src src/ -- This directory contains board specific drivers. This directory will be linked as arch//src/board at configuration time and will be integrated into the build system. src/Makefile -- This makefile will be invoked to build the board specific drivers. It must support the following targets: libext$(LIBEXT), clean, and distclean. A board may have various different configurations using these common source files. Each board configuration is described by three files: Make.defs, defconfig, and setenv.sh. Typically, each set of configuration files is retained in a separate configuration sub-directory (, , .. in the above diagram). Make.defs -- This makefile fragment provides architecture and tool-specific build options. It will be included by all other makefiles in the build (once it is installed). This make fragment should define: Tools: CC, LD, AR, NM, OBJCOPY, OBJDUMP Tool options: CFLAGS, LDFLAGS COMPILE, ASSEMBLE, ARCHIVE, CLEAN, and MKDEP macros When this makefile fragment runs, it will be passed TOPDIR which is the path to the root directory of the build. This makefile fragment may include ${TOPDIR}/.config to perform configuration specific settings. For example, the CFLAGS will most likely be different if CONFIG_DEBUG=y. defconfig -- This is a configuration file similar to the Linux configuration file. In contains variable/value pairs like: CONFIG_VARIABLE=value This configuration file will be used at build time: (1) as a makefile fragment included in other makefiles, and (2) to generate include/nuttx/config.h which is included by most C files in the system. The following variables are recognized by the build (you may also include architecture/board-specific settings). Architecture selection: CONFIG_ARCH - Identifies the arch/ subdirectory CONFIG_ARCH_name - For use in C code CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory CONFIG_ARCH_CHIP_name - For use in C code CONFIG_ARCH_BOARD - Identifies the configs subdirectory and hence, the board that supports the particular chip or SoC. CONFIG_ARCH_BOARD_name - For use in C code CONFIG_ENDIAN_BIG - define if big endian (default is little endian) CONFIG_ARCH_NOINTC - define if the architecture does not support an interrupt controller or otherwise cannot support APIs like up_enable_irq() and up_disable_irq(). CONFIG_ARCH_VECNOTIRQ - Usually the interrupt vector number provided to interfaces like irq_attach() and irq_detach are the same as IRQ numbers that are provied to IRQ management functions like up_enable_irq() and up_disable_irq(). But that is not true for all interrupt controller implementations. For example, the PIC32MX interrupt controller manages interrupt sources that have a many-to-one relationship to interrupt vectors. In such cases, CONFIG_ARCH_VECNOTIRQ must defined so that the OS logic will know not to assume it can use a vector number to enable or disable interrupts. CONFIG_ARCH_IRQPRIO Define if the architecture suports prioritizaton of interrupts and the up_prioritize_irq() API. Some architectures require a description of the RAM configuration: CONFIG_DRAM_SIZE - Describes the installed DRAM. CONFIG_DRAM_START - The start address of DRAM (physical) CONFIG_DRAM_VSTART - The start address of DRAM (virtual) General build options: CONFIG_RRLOAD_BINARY - make the rrload binary format used with BSPs from www.ridgerun.com using the tools/mkimage.sh script. CONFIG_INTELHEX_BINARY - make the Intel HEX binary format used with many different loaders using the GNU objcopy program Should not be selected if you are not using the GNU toolchain. CONFIG_MOTOROLA_SREC - make the Motorola S-Record binary format used with many different loaders using the GNU objcopy program Should not be selected if you are not using the GNU toolchain. CONFIG_RAW_BINARY - make a raw binary format file used with many different loaders using the GNU objcopy program. This option should not be selected if you are not using the GNU toolchain. CONFIG_HAVE_LIBM - toolchain supports libm.a CONFIG_HAVE_CXX - toolchain supports C++ and CXX, CXXFLAGS, and COMPILEXX have been defined in the configurations Make.defs file. CONFIG_HAVE_CXXINITIALIZE - The platform-specific logic includes support for initialization of static C++ instances for this architecture and for the selected toolchain (via up_cxxinitialize()). Building application code: CONFIG_APPS_DIR - Identifies the directory that builds the application to link with NuttX. Default: ../apps This symbol must be assigned to the path to the application build directory *relative* to the NuttX top build direcory. If you had an application directory and the NuttX directory each in separate directory trees like this: build |-nuttx | | | `- Makefile `-application | `- Makefile Then you would set CONFIG_APPS_DIR=../application. The application direction must contain Makefile and this make file must support the following targets: - libapps$(LIBEXT) (usually libapps.a). libapps.a is a static library ( an archive) that contains all of application object files. - clean. Do whatever is appropriate to clean the application directories for a fresh build. - distclean. Clean everthing -- auto-generated files, symbolic links etc. -- so that the directory contents are the same as the contents in your configuration management system. This is only done when you change the NuttX configuration. - depend. Make or update the application build dependencies. When this application is invoked it will receive the setting TOPDIR like: $(MAKE) -C $(CONFIG_APPS_DIR) TOPDIR="$(TOPDIR)" TOPDIR is the full path to the NuttX directory. It can be used, for example, to include makefile fragments (e.g., .config or Make.defs) or to set up include file paths. Two-pass build options. If the 2 pass build option is selected, then these options configure the make system build a extra link object. This link object is assumed to be an incremental (relative) link object, but could be a static library (archive) (some modification to this Makefile would be required if CONFIG_PASS1_TARGET generates an archive). Pass 1 1ncremental (relative) link objects should be put into the processor-specific source directory (where other link objects will be created). If the pass1 obect is an archive, it could go anywhere. CONFIG_BUILD_2PASS - Enables the two pass build options. When the two pass build option is enabled, the following also apply: CONFIG_PASS1_TARGET - The name of the first pass build target. This can be specific build target, a special build target (all, default, etc.) or may just be left undefined. CONFIG_PASS1_BUILDIR - The path, relative to the top NuttX build directory to directory that contains the Makefile to build the first pass object. The Makefile must support the following targets: - The special target CONFIG_PASS1_TARGET (if defined) - and the usual depend, clean, and distclean targets. CONFIG_PASS1_OBJECT - May be used to include an extra, pass1 object into the final link. This would probably be the object generated from the CONFIG_PASS1_TARGET. It may be available at link time in the arch//src directory. General OS setup CONFIG_DEBUG - enables built-in debug options CONFIG_DEBUG_VERBOSE - enables verbose debug output CCONFIG_DEBUG_ENABLE - Support an interface to enable or disable debug output. CONFIG_DEBUG_SYMBOLS - build without optimization and with debug symbols (needed for use with a debugger). CONFIG_DEBUG_SCHED - enable OS debug output (disabled by default) CONFIG_DEBUG_MM - enable memory management debug output (disabled by default) CONFIG_DEBUG_NET - enable network debug output (disabled by default) CONFIG_DEBUG_USB - enable usb debug output (disabled by default) CONFIG_DEBUG_FS - enable filesystem debug output (disabled by default) CONFIG_DEBUG_LIB - enable C library debug output (disabled by default) CONFIG_DEBUG_BINFMT - enable binary loader debug output (disabled by default) CONFIG_DEBUG_GRAPHICS - enable NX graphics debug output (disabled by default) CONFIG_ARCH_LOWPUTC - architecture supports low-level, boot time console output CONFIG_MM_REGIONS - If the architecture includes multiple regions of memory to allocate from, this specifies the number of memory regions that the memory manager must handle and enables the API mm_addregion(start, end); CONFIG_MM_SMALL - Each memory allocation has a small allocation overhead. The size of that overhead is normally determined by the "width" of the address support by the MCU. MCUs that support 16-bit addressability have smaller overhead than devices that support 32-bit addressability. However, there are many MCUs that support 32-bit addressability *but* have internal SRAM of size less than or equal to 64Kb. In this case, CONFIG_MM_SMALL can be defined so that those MCUs will also benefit from the smaller, 16-bit-based allocation overhead. CONFIG_MSEC_PER_TICK - The default system timer is 100Hz or MSEC_PER_TICK=10. This setting may be defined to inform NuttX that the processor hardware is providing system timer interrupts at some interrupt interval other than 10 msec. CONFIG_RR_INTERVAL - The round robin timeslice will be set this number of milliseconds; Round robin scheduling can be disabled by setting this value to zero. CONFIG_SCHED_INSTRUMENTATION - enables instrumentation in scheduler to monitor system performance CONFIG_TASK_NAME_SIZE - Specifies that maximum size of a task name to save in the TCB. Useful if scheduler instrumentation is selected. Set to zero to disable. CONFIG_START_YEAR, CONFIG_START_MONTH, CONFIG_START_DAY - Used to initialize the internal time logic. CONFIG_GREGORIAN_TIME - Enables Gregorian time conversions. You would only need this if you are concerned about accurate time conversions in the past or in the distant future. CONFIG_JULIAN_TIME - Enables Julian time conversions. You would only need this if you are concerned about accurate time conversion in the distand past. You must also define CONFIG_GREGORIAN_TIME in order to use Julian time. CONFIG_DEV_CONSOLE - Set if architecture-specific logic provides /dev/console. Enables stdout, stderr, stdin. This implies the "normal" serial driver provides the console unless another console device is specified (See CONFIG_DEV_LOWCONSOLE). CONFIG_MUTEX_TYPES - Set to enable support for recursive and errorcheck mutexes. Enables pthread_mutexattr_settype(). CONFIG_PRIORITY_INHERITANCE - Set to enable support for priority inheritance on mutexes and semaphores. Priority inheritance is a strategy for addressing priority inversion. CONFIG_SEM_PREALLOCHOLDERS: This setting is only used if priority inheritance is enabled. It defines the maximum number of different threads (minus one) that can take counts on a semaphore with priority inheritance support. This may be set to zero if priority inheritance is disabled OR if you are only using semaphores as mutexes (only one holder) OR if no more than two threads participate using a counting semaphore. If defined, then this should be a relatively large number because this is the total number of counts on the total number of semaphores (like 64 or 100). CONFIG_SEM_NNESTPRIO. If priority inheritance is enabled, then this setting is the maximum number of higher priority threads (minus 1) than can be waiting for another thread to release a count on a semaphore. This value may be set to zero if no more than one thread is expected to wait for a semaphore. If defined, then this should be a relatively small number because this the number of maximumum of waiters on one semaphore (like 4 or 8). CONFIG_FDCLONE_DISABLE. Disable cloning of all file descriptors by task_create() when a new task is started. If set, all files/drivers will appear to be closed in the new task. CONFIG_FDCLONE_STDIO. Disable cloning of all but the first three file descriptors (stdin, stdout, stderr) by task_create() when a new task is started. If set, all files/drivers will appear to be closed in the new task except for stdin, stdout, and stderr. CONFIG_SDCLONE_DISABLE. Disable cloning of all socket desciptors by task_create() when a new task is started. If set, all sockets will appear to be closed in the new task. CONFIG_NXFLAT. Enable support for the NXFLAT binary format. This format will support execution of NuttX binaries located in a ROMFS filesystem (see examples/nxflat). CONFIG_SCHED_WORKQUEUE. Create a dedicated "worker" thread to handle delayed processing from interrupt handlers. This feature is required for some drivers but, if there are not complaints, can be safely disabled. The worker thread also performs garbage collection -- completing any delayed memory deallocations from interrupt handlers. If the worker thread is disabled, then that clean will be performed by the IDLE thread instead (which runs at the lowest of priority and may not be appropriate if memory reclamation is of high priority). If CONFIG_SCHED_WORKQUEUE is enabled, then the following options can also be used: CONFIG_SCHED_WORKPRIORITY - The execution priority of the worker thread. Default: 192 CONFIG_SCHED_WORKPERIOD - How often the worker thread checks for work in units of microseconds. Default: 50*1000 (50 MS). CONFIG_SCHED_WORKSTACKSIZE - The stack size allocated for the worker thread. Default: CONFIG_IDLETHREAD_STACKSIZE. CONFIG_SIG_SIGWORK - The signal number that will be used to wake-up the worker thread. Default: 4 CONFIG_SCHED_LPWORK. If CONFIG_SCHED_WORKQUEUE is defined, then a single work queue is created by default. If CONFIG_SCHED_LPWORK is also defined then an additional, lower-priority work queue will also be created. This lower priority work queue is better suited for more extended processing (such as file system clean-up operations) CONFIG_SCHED_LPWORKPRIORITY - The execution priority of the lower priority worker thread. Default: 50 CONFIG_SCHED_LPWORKPERIOD - How often the lower priority worker thread checks for work in units of microseconds. Default: 50*1000 (50 MS). CONFIG_SCHED_LPWORKSTACKSIZE - The stack size allocated for the lower priority worker thread. Default: CONFIG_IDLETHREAD_STACKSIZE. CONFIG_SCHED_WAITPID - Enables the waitpid() API CONFIG_SCHED_ATEXIT - Enables the atexit() API CONFIG_SCHED_ATEXIT_MAX - By default if CONFIG_SCHED_ATEXIT is selected, only a single atexit() function is supported. That number can be increased by defined this setting to the number that you require. CONFIG_SCHED_ONEXIT - Enables the on_exit() API CONFIG_SCHED_ONEXIT_MAX - By default if CONFIG_SCHED_ONEXIT is selected, only a single on_exit() function is supported. That number can be increased by defined this setting to the number that you require. CONFIG_USER_ENTRYPOINT - The name of the entry point for user applications. For the example applications this is of the form 'app_main' where 'app' is the application name. If not defined, CONFIG_USER_ENTRYPOINT defaults to user_start. System Logging: CONFIG_SYSLOG enables general system logging support. CONFIG_SYSLOG_DEVPATH - The full path to the system logging device. Default "/dev/ramlog" (RAMLOG) or "dev/ttyS1" (character device) At present, there are two system loggins devices available. If CONFIG_SYSLOG is selected, then these options are also available. CONFIG_SYSLOG_CHAR - Enable the generic character device for the SYSLOG. A disadvantage of using the generic character device for the SYSLOG is that it cannot handle debug output generated from interrupt level handlers. NOTE: No more than one SYSLOG device should be configured. CONFIG_RAMLOG - Enables the RAM logging feature. The RAM log is a circular buffer in RAM. NOTE: No more than one SYSLOG device should be configured. CONFIG_RAMLOG_CONSOLE - Use the RAM logging device as a system console. If this feature is enabled (along with CONFIG_DEV_CONSOLE), then all console output will be re-directed to a circular buffer in RAM. This is useful, for example, if the only console is a Telnet console. Then in that case, console output from non-Telnet threads will go to the circular buffer and can be viewed using the NSH 'dmesg' command. CONFIG_RAMLOG_SYSLOG - Use the RAM logging device for the syslogging interface. If this feature is enabled (along with CONFIG_SYSLOG), then all debug output (only) will be re-directed to the circular buffer in RAM. This RAM log can be view from NSH using the 'dmesg' command. NOTE: Unlike the limited, generic character driver SYSLOG device, the RAMLOG *can* be used to generate debug output from interrupt level handlers. CONFIG_RAMLOG_NPOLLWAITERS - The number of threads than can be waiting for this driver on poll(). Default: 4 If CONFIG_RAMLOG_CONSOLE or CONFIG_RAMLOG_SYSLOG is selected, then the following may also be provided: CONFIG_RAMLOG_CONSOLE_BUFSIZE - Size of the console RAM log. Default: 1024 Kernel build options: CONFIG_NUTTX_KERNEL - Builds NuttX as a separately compiled kernel. CONFIG_SYS_RESERVED - Reserved system call values for use by architecture-specific logic. OS setup related to on-demand paging: CONFIG_PAGING - If set =y in your configation file, this setting will enable the on-demand paging feature as described in http://www.nuttx.org/NuttXDemandPaging.html. If CONFIG_PAGING is selected, then you will probabaly need CONFIG_BUILD_2PASS to correctly position the code and the following configuration options also apply: CONFIG_PAGING_PAGESIZE - The size of one managed page. This must be a value supported by the processor's memory management unit. CONFIG_PAGING_NLOCKED - This is the number of locked pages in the memory map. The locked address region will then be from CONFIG_DRAM_VSTART through (CONFIG_DRAM_VSTART + CONFIG_PAGING_PAGESIZE*CONFIG_PAGING_NLOCKED) CONFIG_PAGING_LOCKED_PBASE and CONFIG_PAGING_LOCKED_VBASE - These may be defined to determine the base address of the locked page regions. If neither are defined, the logic will be set the bases to CONFIG_DRAM_START and CONFIG_DRAM_VSTART (i.e., it assumes that the base address of the locked region is at the beginning of RAM). NOTE: In some architectures, it may be necessary to take some memory from the beginning of this region for vectors or for a page table. In such cases, CONFIG_PAGING_LOCKED_P/VBASE should take that into consideration to prevent overlapping the locked memory region and the system data at the beginning of SRAM. CONFIG_PAGING_NPPAGED - This is the number of physical pages available to support the paged text region. This paged region begins at (CONFIG_PAGING_LOCKED_PBASE + CONFIG_PAGING_PAGESIZE*CONFIG_PAGING_NPPAGED) and continues until (CONFIG_PAGING_LOCKED_PBASE + CONFIG_PAGING_PAGESIZE*(CONFIG_PAGING_NLOCKED + CONFIG_PAGING_NPPAGED) CONFIG_PAGING_NVPAGED - This actual size of the paged text region (in pages). This is also the number of virtual pages required to support the entire paged region. The on-demand paging feature is intended to support only the case where the virtual paged text area is much larger the available physical pages. Otherwise, why would you enable on-demand paging? CONFIG_PAGING_NDATA - This is the number of data pages in the memory map. The data region will extend to the end of RAM unless overridden by a setting in the configuration file. NOTE: In some architectures, it may be necessary to take some memory from the end of RAM for page tables or other system usage. The configuration settings and linker directives must be cognizant of that: CONFIG_PAGING_NDATA should be defined to prevent the data region from extending all the way to the end of memory. CONFIG_PAGING_DEFPRIO - The default, minimum priority of the page fill worker thread. The priority of the page fill work thread will be boosted boosted dynmically so that it matches the priority of the task on behalf of which it peforms the fill. This defines the minimum priority that will be used. Default: 50. CONFIG_PAGING_STACKSIZE - Defines the size of the allocated stack for the page fill worker thread. Default: 1024. CONFIG_PAGING_BLOCKINGFILL - The architecture specific up_fillpage() function may be blocking or non-blocking. If defined, this setting indicates that the up_fillpage() implementation will block until the transfer is completed. Default: Undefined (non-blocking). CONFIG_PAGING_WORKPERIOD - The page fill worker thread will wake periodically even if there is no mapping to do. This selection controls that wake-up period (in microseconds). This wake-up a failsafe that will handle any cases where a single is lost (that would really be a bug and shouldn't happen!) and also supports timeouts for case of non-blocking, asynchronous fills (see CONFIG_PAGING_TIMEOUT_TICKS). CONFIG_PAGING_TIMEOUT_TICKS - If defined, the implementation will monitor the (asynchronous) page fill logic. If the fill takes longer than this number if microseconds, then a fatal error will be declared. Default: No timeouts monitored. Some architecture-specific settings. Defaults are architecture specific. If you don't know what you are doing, it is best to leave these undefined and try the system defaults: CONFIG_PAGING_VECPPAGE - This the physical address of the page in memory to be mapped to the vector address. CONFIG_PAGING_VECL2PADDR - This is the physical address of the L2 page table entry to use for the vector mapping. CONFIG_PAGING_VECL2VADDR - This is the virtual address of the L2 page table entry to use for the vector mapping. CONFIG_PAGING_BINPATH - If CONFIG_PAGING_BINPATH is defined, then it is the full path to a file on a mounted file system that contains a binary image of the NuttX executable. Pages will be filled by reading from offsets into this file that correspond to virtual fault addresses. CONFIG_PAGING_MOUNTPT - If CONFIG_PAGING_BINPATH is defined, additional options may be provided to control the initialization of underlying devices. CONFIG_PAGING_MOUNTPT identifies the mountpoint to be used if a device is mounted. CONFIG_PAGING_MINOR - Some mount operations require a "minor" number to identify the specific device instance. Default: 0 CONFIG_PAGING_SDSLOT - If CONFIG_PAGING_BINPATH is defined, additional options may be provided to control the initialization of underlying devices. CONFIG_PAGING_SDSLOT identifies the slot number of the SD device to initialize. This must be undefined if SD is not being used. This should be defined to be zero for the typical device that has only a single slot (See CONFIG_MMCSD_NSLOTS). If defined, CONFIG_PAGING_SDSLOT will instruct certain board-specific logic to initialize the media in this SD slot. CONFIG_PAGING_M25PX - Use the m25px.c FLASH driver. If this is selected, then the MTD interface to the M25Px device will be used to support paging. CONFIG_PAGING_AT45DB - Use the at45db.c FLASH driver. If this is selected, then the MTD interface to the Atmel AT45DB device will be used to support paging. CONFIG_PAGING_BINOFFSET - If CONFIG_PAGING_M25PX or is CONFIG_PAGING_AT45DB defined then CONFIG_PAGING_BINOFFSET will be used to specify the offset in bytes into the FLASH device where the NuttX binary image is located. Default: 0 CONFIG_PAGING_SPIPORT - If CONFIG_PAGING_M25PX CONFIG_PAGING_AT45DB is defined and the device has multiple SPI busses (ports), then this configuration should be set to indicate which SPI port the device is connected. Default: 0 The following can be used to disable categories of APIs supported by the OS. If the compiler supports weak functions, then it should not be necessary to disable functions unless you want to restrict usage of those APIs. There are certain dependency relationships in these features. o mq_notify logic depends on signals to awaken tasks waiting for queues to become full or empty. o pthread_condtimedwait() depends on signals to wake up waiting tasks. CONFIG_DISABLE_CLOCK, CONFIG_DISABLE_POSIX_TIMERS, CONFIG_DISABLE_PTHREAD. CONFIG_DISABLE_SIGNALS, CONFIG_DISABLE_MQUEUE, CONFIG_DISABLE_MOUNTPOUNT, CONFIG_DISABLE_ENVIRON, CONFIG_DISABLE_POLL Misc libc settings CONFIG_NOPRINTF_FIELDWIDTH - sprintf-related logic is a little smaller if we do not support fieldwidthes CONFIG_LIBC_FLOATINGPOINT - By default, floating point support in printf, sscanf, etc. is disabled. CONFIG_LIBC_STRERROR - strerror() is useful because it decodes 'errno' values into a human readable strings. But it can also require a lot of memory. If this option is selected, strerror() will still exist in the build but it will not decode error values. This option should be used by other logic to decide if it should use strerror() or not. For example, the NSH application will not use strerror() if this option is not selected; perror() will not use strerror() is this option is not selected (see also CONFIG_NSH_STRERROR). CONFIG_LIBC_STRERROR_SHORT - If this option is selected, then strerror() will use a shortened string when it decodes the error. Specifically, strerror() is simply use the string that is the common name for the error. For example, the 'errno' value of 2 will produce the string "No such file or directory" if CONFIG_LIBC_STRERROR_SHORT is not defined but the string "ENOENT" if CONFIG_LIBC_STRERROR_SHORT is defined. CONFIG_LIBC_PERROR_STDOUT - POSIX requires that perror() provide its output on stderr. This option may be defined, however, to provide perror() output that is serialized with other stdout messages. Allow for architecture optimized implementations The architecture can provide optimized versions of the following to improve system performance CONFIG_ARCH_MEMCPY, CONFIG_ARCH_MEMCMP, CONFIG_ARCH_MEMMOVE CONFIG_ARCH_MEMSET, CONFIG_ARCH_STRCMP, CONFIG_ARCH_STRCPY CONFIG_ARCH_STRNCPY, CONFIG_ARCH_STRLEN, CONFIG_ARCH_STRNLEN CONFIG_ARCH_BZERO The architecture may provide custom versions of certain standard header files: CONFIG_ARCH_STDBOOL_H - The stdbool.h header file can be found at nuttx/include/stdbool.h. However, that header includes logic to redirect the inclusion of an architecture specific header file like: #ifdef CONFIG_ARCH_STDBOOL_H # include #else ... #endif Recall that that include path, include/arch, is a symbolic link and will refer to a version of stdbool.h at nuttx/arch//include/stdbool.h. CONFIG_ARCH_STDINT_H - Similar logic exists for the stdint.h header file can also be found at nuttx/include/stdint.h. #ifdef CONFIG_ARCH_STDBOOL_H # include #else ... #endif CONFIG_ARCH_MATH_H - There is also a re-directing version of math.h in the source tree. However, it resides out-of-the-way at include/nuttx/math.h because it conflicts too often with the system math.h. If CONFIG_ARCH_MATH_H=y is defined, however, the top-level makefile will copy the redirecting math.h header file from include/nuttx/math.h to include/math.h. math.h will then include the architecture-specific version of math.h that you must provide at nuttx/arch/>architecture #endif So for the architectures that define CONFIG_ARCH_MATH_H=y, include/math.h will be the redirecting math.h header file; for the architectures that don't select CONFIG_ARCH_MATH_H, the redirecting math.h header file will stay out-of-the-way in include/nuttx/. CONFIG_ARCH_STDARG_H - There is also a redirecting version of stdarg.h in the source tree as well. It also resides out-of-the-way at include/nuttx/stdarg.h. This is because you should normally use your toolchain's stdarg.h file. But sometimes, your toolchain's stdarg.h file may have other header file dependencies and so may not be usable in the NuttX build environment. In those cases, you may have to create a architecture-specific stdarg.h header file at nuttx/arch/>architecture 0) CONFIG_STDIO_LINEBUFFER - If standard C buffered I/O is enabled (CONFIG_STDIO_BUFFER_SIZE > 0), then this option may be added to force automatic, line-oriented flushing the output buffer for putc(), fputc(), putchar(), puts(), fputs(), printf(), fprintf(), and vfprintf(). When a newline is encountered in the output string, the output buffer will be flushed. This (slightly) increases the NuttX footprint but supports the kind of behavior that people expect for printf(). CONFIG_NUNGET_CHARS - Number of characters that can be buffered by ungetc() (Only if CONFIG_NFILE_STREAMS > 0) CONFIG_PREALLOC_MQ_MSGS - The number of pre-allocated message structures. The system manages a pool of preallocated message structures to minimize dynamic allocations CONFIG_PREALLOC_IGMPGROUPS - Pre-allocated IGMP groups are used only if needed from interrupt level group created (by the IGMP server). Default: 4. CONFIG_MQ_MAXMSGSIZE - Message structures are allocated with a fixed payload size given by this settin (does not include other message structure overhead. CONFIG_PREALLOC_WDOGS - The number of pre-allocated watchdog structures. The system manages a pool of preallocated watchdog structures to minimize dynamic allocations CONFIG_DEV_PIPE_SIZE - Size, in bytes, of the buffer to allocated for pipe and FIFO support Filesystem configuration CONFIG_FS_FAT - Enable FAT filesystem support CONFIG_FAT_SECTORSIZE - Max supported sector size CONFIG_FAT_LCNAMES - Enable use of the NT-style upper/lower case 8.3 file name support. CONFIG_FAT_LFN - Enable FAT long file names. NOTE: Microsoft claims patents on FAT long file name technology. Please read the disclaimer in the top-level COPYING file and only enable this feature if you understand these issues. CONFIG_FAT_MAXFNAME - If CONFIG_FAT_LFN is defined, then the default, maximum long file name is 255 bytes. This can eat up a lot of memory (especially stack space). If you are willing to live with some non-standard, short long file names, then define this value. A good choice would be the same value as selected for CONFIG_NAME_MAX which will limit the visibility of longer file names anyway. CONFIG_FS_FATTIME: Support FAT date and time. NOTE: There is not much sense in supporting FAT date and time unless you have a hardware RTC or other way to get the time and date. CONFIG_FS_NXFFS: Enable NuttX FLASH file system (NXFF) support. CONFIG_NXFFS_ERASEDSTATE: The erased state of FLASH. This must have one of the values of 0xff or 0x00. Default: 0xff. CONFIG_NXFFS_PACKTHRESHOLD: When packing flash file data, don't both with file chunks smaller than this number of data bytes. Default: 32. CONFIG_NXFFS_MAXNAMLEN: The maximum size of an NXFFS file name. Default: 255. CONFIG_NXFFS_PACKTHRESHOLD: When packing flash file data, don't both with file chunks smaller than this number of data bytes. Default: 32. CONFIG_NXFFS_TAILTHRESHOLD: clean-up can either mean packing files together toward the end of the file or, if file are deleted at the end of the file, clean up can simply mean erasing the end of FLASH memory so that it can be re-used again. However, doing this can also harm the life of the FLASH part because it can mean that the tail end of the FLASH is re-used too often. This threshold determines if/when it is worth erased the tail end of FLASH and making it available for re-use (and possible over-wear). Default: 8192. CONFIG_FS_ROMFS - Enable ROMFS filesystem support CONFIG_NFS - Enable Network File System (NFS) client file system support. Provided support is version 3 using UDP. In addition to common prerequisites for mount-able file systems in general, this option requires UDP networking support; this would include CONFIG_NETand CONFIG_NET_UDP at a minimum. CONFIG_FS_RAMMAP - For file systems that do not support XIP, this option will enable a limited form of memory mapping that is implemented by copying whole files into memory. RTC CONFIG_RTC - Enables general support for a hardware RTC. Specific architectures may require other specific settings. CONFIG_RTC_DATETIME - There are two general types of RTC: (1) A simple battery backed counter that keeps the time when power is down, and (2) A full date / time RTC the provides the date and time information, often in BCD format. If CONFIG_RTC_DATETIME is selected, it specifies this second kind of RTC. In this case, the RTC is used to "seed" the normal NuttX timer and the NuttX system timer provides for higher resoution time. CONFIG_RTC_HIRES - If CONFIG_RTC_DATETIME not selected, then the simple, battery backed counter is used. There are two different implementations of such simple counters based on the time resolution of the counter: The typical RTC keeps time to resolution of 1 second, usually supporting a 32-bit time_t value. In this case, the RTC is used to "seed" the normal NuttX timer and the NuttX timer provides for higher resoution time. If CONFIG_RTC_HIRES is enabled in the NuttX configuration, then the RTC provides higher resolution time and completely replaces the system timer for purpose of date and time. CONFIG_RTC_FREQUENCY - If CONFIG_RTC_HIRES is defined, then the frequency of the high resolution RTC must be provided. If CONFIG_RTC_HIRES is not defined, CONFIG_RTC_FREQUENCY is assumed to be one. CONFIG_RTC_ALARM - Enable if the RTC hardware supports setting of an alarm. A callback function will be executed when the alarm goes off CAN driver CONFIG_CAN - Enables CAN support (one or both of CONFIG_STM32_CAN1 or CONFIG_STM32_CAN2 must also be defined) CONFIG_CAN_EXTID - Enables support for the 29-bit extended ID. Default Standard 11-bit IDs. CONFIG_CAN_FIFOSIZE - The size of the circular buffer of CAN messages. Default: 8 CONFIG_CAN_NPENDINGRTR - The size of the list of pending RTR requests. Default: 4 CONFIG_CAN_LOOPBACK - A CAN driver may or may not support a loopback mode for testing. If the driver does support loopback mode, the setting will enable it. (If the driver does not, this setting will have no effect). SPI driver CONFIG_SPI_OWNBUS - Set if there is only one active device on the SPI bus. No locking or SPI configuration will be performed. It is not necessary for clients to lock, re-configure, etc.. CONFIG_SPI_EXCHANGE - Driver supports a single exchange method (vs a recvblock() and sndblock ()methods) SPI-based MMC/SD driver CONFIG_MMCSD_NSLOTS - Number of MMC/SD slots supported by the driver. Default is one. CONFIG_MMCSD_READONLY - Provide read-only access. Default is Read/Write CONFIG_MMCSD_SPICLOCK - Maximum SPI clock to drive MMC/SD card. Default is 20MHz. SDIO/SDHC driver: CONFIG_SDIO_DMA - SDIO driver supports DMA CONFIG_SDIO_MUXBUS - Set this SDIO interface if the SDIO interface or hardware resources are shared with other drivers. CONFIG_SDIO_WIDTH_D1_ONLY - Select 1-bit transfer mode. Default: 4-bit transfer mode. CONFIG_MMCSD_MULTIBLOCK_DISABLE - Use only the single block transfer method. This setting is used to work around buggy SDIO drivers that cannot handle multiple block transfers. SDIO-based MMC/SD driver CONFIG_FS_READAHEAD - Enable read-ahead buffering CONFIG_FS_WRITEBUFFER - Enable write buffering CONFIG_MMCSD_MMCSUPPORT - Enable support for MMC cards CONFIG_MMCSD_HAVECARDDETECT - SDIO driver card detection is 100% accurate RiT P14201 OLED driver CONFIG_LCD_P14201 - Enable P14201 support CONFIG_P14201_SPIMODE - Controls the SPI mode CONFIG_P14201_FREQUENCY - Define to use a different bus frequency CONFIG_P14201_NINTERFACES - Specifies the number of physical P14201 devices that will be supported. CONFIG_P14201_FRAMEBUFFER - If defined, accesses will be performed using an in-memory copy of the OLEDs GDDRAM. This cost of this buffer is 128 * 96 / 2 = 6Kb. If this is defined, then the driver will be fully functional. If not, then it will have the following limitations: - Reading graphics memory cannot be supported, and - All pixel writes must be aligned to byte boundaries. The latter limitation effectively reduces the 128x96 disply to 64x96. Nokia 6100 Configuration Settings: CONFIG_NOKIA6100_SPIMODE - Controls the SPI mode CONFIG_NOKIA6100_FREQUENCY - Define to use a different bus frequency CONFIG_NOKIA6100_NINTERFACES - Specifies the number of physical Nokia 6100 devices that will be supported. CONFIG_NOKIA6100_BPP - Device supports 8, 12, and 16 bits per pixel. CONFIG_NOKIA6100_S1D15G10 - Selects the Epson S1D15G10 display controller CONFIG_NOKIA6100_PCF8833 - Selects the Phillips PCF8833 display controller CONFIG_NOKIA6100_BLINIT - Initial backlight setting The following may need to be tuned for your hardware: CONFIG_NOKIA6100_INVERT - Display inversion, 0 or 1, Default: 1 CONFIG_NOKIA6100_MY - Display row direction, 0 or 1, Default: 0 CONFIG_NOKIA6100_MX - Display column direction, 0 or 1, Default: 1 CONFIG_NOKIA6100_V - Display address direction, 0 or 1, Default: 0 CONFIG_NOKIA6100_ML - Display scan direction, 0 or 1, Default: 0 CONFIG_NOKIA6100_RGBORD - Display RGB order, 0 or 1, Default: 0 Required LCD driver settings: CONFIG_LCD_NOKIA6100 - Enable Nokia 6100 support CONFIG_LCD_MAXCONTRAST - must be 63 with the Epson controller and 127 with the Phillips controller. CONFIG_LCD_MAXPOWER - Maximum value of backlight setting. The backlight control is managed outside of the 6100 driver so this value has no meaning to the driver. Board-specific logic may place restrictions on this value. Input Devices CONFIG_INPUT Enables general support for input devices CONFIG_INPUT_TSC2007 If CONFIG_INPUT is selected, then this setting will enable building of the TI TSC2007 touchscreen driver. CONFIG_TSC2007_MULTIPLE Normally only a single TI TSC2007 touchscreen is used. But if there are multiple TSC2007 touchscreens, this setting will enable multiple touchscreens with the same driver. CONFIG_INPUT_STMPE811 Enables support for the STMPE811 driver (Needs CONFIG_INPUT) CONFIG_STMPE811_SPI Enables support for the SPI interface (not currenly supported) CONFIG_STMPE811_I2C Enables support for the I2C interface CONFIG_STMPE811_MULTIPLE Can be defined to support multiple STMPE811 devices on board. CONFIG_STMPE811_ACTIVELOW Interrupt is generated by an active low signal (or falling edge). CONFIG_STMPE811_EDGE Interrupt is generated on an edge (vs. on the active level) CONFIG_STMPE811_NPOLLWAITERS Maximum number of threads that can be waiting on poll() (ignored if CONFIG_DISABLE_POLL is set). CONFIG_STMPE811_TSC_DISABLE Disable driver touchscreen functionality. CONFIG_STMPE811_ADC_DISABLE Disable driver ADC functionality. CONFIG_STMPE811_GPIO_DISABLE Disable driver GPIO functionlaity. CONFIG_STMPE811_GPIOINT_DISABLE Disable driver GPIO interrupt functionality (ignored if GPIO functionality is disabled). CONFIG_STMPE811_SWAPXY Reverse the meaning of X and Y to handle different LCD orientations. CONFIG_STMPE811_TEMP_DISABLE Disable driver temperature sensor functionality. CONFIG_STMPE811_REGDEBUG Enabled very low register-level debug output. Requires CONFIG_DEBUG. CONFIG_STMPE811_THRESHX and CONFIG_STMPE811_THRESHY STMPE811 touchscreen data comes in a a very high rate. New touch positions will only be reported when the X or Y data changes by these thresholds. This trades reduces data rate for some loss in dragging accuracy. The STMPE811 is configure for 12-bit values so the raw ranges are 0-4095. So for example, if your display is 320x240, then THRESHX=13 and THRESHY=17 would correspond to one pixel. Default: 12 Analog Devices CONFIG_DAC Enables general support for Digital-to-Analog conversion devices. CONFIG_ADC Enables general support for Analog-to-Digital conversion devices. CONFIG_ADC_ADS125X Adds support for the TI ADS 125x ADC. ENC28J60 Ethernet Driver Configuration Settings: CONFIG_NET_ENC28J60 - Enabled ENC28J60 support CONFIG_ENC28J60_SPIMODE - Controls the SPI mode CONFIG_ENC28J60_FREQUENCY - Define to use a different bus frequency CONFIG_ENC28J60_NINTERFACES - Specifies the number of physical ENC28J60 devices that will be supported. CONFIG_ENC28J60_STATS - Collect network statistics CONFIG_ENC28J60_HALFDUPPLEX - Default is full duplex Networking support via uIP CONFIG_NET - Enable or disable all network features CONFIG_NET_NOINTS -- CONFIG_NET_NOINT indicates that uIP not called from the interrupt level. If CONFIG_NET_NOINTS is defined, critical sections will be managed with semaphores; Otherwise, it assumed that uIP will be called from interrupt level handling and critical sections will be managed by enabling and disabling interrupts. CONFIG_NET_MULTIBUFFER - Traditionally, uIP has used a single buffer for all incoming and outgoing traffic. If this configuration is selected, then the driver can manage multiple I/O buffers and can, for example, be filling one input buffer while sending another output buffer. Or, as another example, the driver may support queuing of concurrent input/ouput and output transfers for better performance. CONFIG_NET_IPv6 - Build in support for IPv6 CONFIG_NSOCKET_DESCRIPTORS - Maximum number of socket descriptors per task/thread. CONFIG_NET_NACTIVESOCKETS - Maximum number of concurrent socket operations (recv, send, etc.). Default: CONFIG_NET_TCP_CONNS+CONFIG_NET_UDP_CONNS CONFIG_NET_SOCKOPTS - Enable or disable support for socket options CONFIG_NET_BUFSIZE - uIP buffer size CONFIG_NET_TCPURGDATA - Determines if support for TCP urgent data notification should be compiled in. Urgent data (out-of-band data) is a rarely used TCP feature that is very seldom would be required. CONFIG_NET_TCP - TCP support on or off CONFIG_NET_TCP_CONNS - Maximum number of TCP connections (all tasks) CONFIG_NET_MAX_LISTENPORTS - Maximum number of listening TCP ports (all tasks) CONFIG_NET_TCP_READAHEAD_BUFSIZE - Size of TCP read-ahead buffers CONFIG_NET_NTCP_READAHEAD_BUFFERS - Number of TCP read-ahead buffers (may be zero) CONFIG_NET_TCPBACKLOG - Incoming connections pend in a backlog until accept() is called. The size of the backlog is selected when listen() is called. CONFIG_NET_UDP - UDP support on or off CONFIG_NET_UDP_CHECKSUMS - UDP checksums on or off CONFIG_NET_UDP_CONNS - The maximum amount of concurrent UDP connections CONFIG_NET_ICMP - Enable minimal ICMP support. Includes built-in support for sending replies to received ECHO (ping) requests. CONFIG_NET_ICMP_PING - Provide interfaces to support application level support for sending ECHO (ping) requests and associating ECHO replies. CONFIG_NET_IGMP - Enable IGMPv2 client support. CONFIG_PREALLOC_IGMPGROUPS - Pre-allocated IGMP groups are used only if needed from interrupt level group created (by the IGMP server). Default: 4. CONFIG_NET_PINGADDRCONF - Use "ping" packet for setting IP address CONFIG_NET_STATISTICS - uIP statistics on or off CONFIG_NET_RECEIVE_WINDOW - The size of the advertised receiver's window CONFIG_NET_ARPTAB_SIZE - The size of the ARP table CONFIG_NET_ARP_IPIN - Harvest IP/MAC address mappings from the ARP table from incoming IP packets. CONFIG_NET_BROADCAST - Incoming UDP broadcast support CONFIG_NET_MULTICAST - Outgoing multi-cast address support CONFIG_NET_FWCACHE_SIZE - number of packets to remember when looking for duplicates SLIP Driver. SLIP supports point-to-point IP communications over a serial port. The default data link layer for uIP is Ethernet. If CONFIG_NET_SLIP is defined in the NuttX configuration file, then SLIP will be supported. The basic differences between the SLIP and Ethernet configurations is that when SLIP is selected: * The link level header (that comes before the IP header) is omitted. * All MAC address processing is suppressed. * ARP is disabled. If CONFIG_NET_SLIP is not selected, then Ethernet will be used (there is no need to define anything special in the configuration file to use Ethernet -- it is the default). CONFIG_NET_SLIP -- Enables building of the SLIP driver. SLIP requires at least one IP protocols selected and the following additional network settings: CONFIG_NET_NOINTS and CONFIG_NET_MULTIBUFFER. CONFIG_NET_BUFSIZE *must* be set to 296. Other optional configuration settings that affect the SLIP driver: CONFIG_NET_STATISTICS. Default: Ethernet If SLIP is selected, then the following SLIP options are available: CONFIG_CLIP_NINTERFACES -- Selects the number of physical SLIP interfaces to support. Default: 1 CONFIG_SLIP_STACKSIZE -- Select the stack size of the SLIP RX and TX tasks. Default: 2048 CONFIG_SLIP_DEFPRIO - The priority of the SLIP RX and TX tasks. Default: 128 UIP Network Utilities CONFIG_NET_DHCP_LIGHT - Reduces size of DHCP CONFIG_NET_RESOLV_ENTRIES - Number of resolver entries THTTPD CONFIG_THTTPD_PORT - THTTPD Server port number CONFIG_THTTPD_IPADDR - Server IP address (no host name) CONFIG_THTTPD_SERVER_ADDRESS - SERVER_ADDRESS: response CONFIG_THTTPD_SERVER_SOFTWARE - SERVER_SOFTWARE: response CONFIG_THTTPD_PATH - Server working directory CONFIG_THTTPD_CGI_PATH - Path to CGI executables CONFIG_THTTPD_CGI_PATTERN - Only CGI programs matching this pattern will be executed. In fact, if this value is not defined then no CGI logic will be built. CONFIG_THTTPD_CGI_PRIORITY - Provides the priority of CGI child tasks CONFIG_THTTPD_CGI_STACKSIZE - Provides the initial stack size of CGI child task (will be overridden by the stack size in the NXFLAT header) CONFIG_THTTPD_CGI_BYTECOUNT - Byte output limit for CGI tasks. CONFIG_THTTPD_CGI_TIMELIMIT - How many seconds to allow CGI programs to run before killing them. CONFIG_THTTPD_CHARSET- The default character set name to use with text MIME types. CONFIG_THTTPD_IOBUFFERSIZE - CONFIG_THTTPD_INDEX_NAMES - A list of index filenames to check. The files are searched for in this order. CONFIG_AUTH_FILE - The file to use for authentication. If this is defined then thttpd checks for this file in the local directory before every fetch. If the file exists then authentication is done, otherwise the fetch proceeds as usual. If you leave this undefined then thttpd will not implement authentication at all and will not check for auth files, which saves a bit of CPU time. A typical value is ".htpasswd" CONFIG_THTTPD_LISTEN_BACKLOG - The listen() backlog queue length. CONFIG_THTTPD_LINGER_MSEC - How many milliseconds to leave a connection open while doing a lingering close. CONFIG_THTTPD_OCCASIONAL_MSEC - How often to run the occasional cleanup job. CONFIG_THTTPD_IDLE_READ_LIMIT_SEC - How many seconds to allow for reading the initial request on a new connection. CONFIG_THTTPD_IDLE_SEND_LIMIT_SEC - How many seconds before an idle connection gets closed. CONFIG_THTTPD_TILDE_MAP1 and CONFIG_THTTPD_TILDE_MAP2 - Tilde mapping. Many URLs use ~username to indicate a user's home directory. thttpd provides two options for mapping this construct to an actual filename. 1) Map ~username to /username. This is the recommended choice. Each user gets a subdirectory in the main web tree, and the tilde construct points there. The prefix could be something like "users", or it could be empty. 2) Map ~username to /. The postfix would be the name of a subdirectory off of the user's actual home dir, something like "public_html". You can also leave both options undefined, and thttpd will not do anything special about tildes. Enabling both options is an error. Typical values, if they're defined, are "users" for CONFIG_THTTPD_TILDE_MAP1 and "public_html"forCONFIG_THTTPD_TILDE_MAP2. CONFIG_THTTPD_GENERATE_INDICES CONFIG_THTTPD_URLPATTERN - If defined, then it will be used to match and verify referrers. FTP Server CONFIG_FTPD_VENDORID - The vendor name to use in FTP communications. Default: "NuttX" CONFIG_FTPD_SERVERID - The server name to use in FTP communications. Default: "NuttX FTP Server" CONFIG_FTPD_CMDBUFFERSIZE - The maximum size of one command. Default: 128 bytes. CONFIG_FTPD_DATABUFFERSIZE - The size of the I/O buffer for data transfers. Default: 512 bytes. CONFIG_FTPD_WORKERSTACKSIZE - The stacksize to allocate for each FTP daemon worker thread. Default: 2048 bytes. Other required configuration settings: Of course TCP networking support is required. But here are a couple that are less obvious: CONFIG_DISABLE_PTHREAD - pthread support is required CONFIG_DISABLE_POLL - poll() support is required USB device controller driver CONFIG_USBDEV - Enables USB device support CONFIG_USBDEV_COMPOSITE Enables USB composite device support CONFIG_USBDEV_ISOCHRONOUS - Build in extra support for isochronous endpoints CONFIG_USBDEV_DUALSPEED -Hardware handles high and full speed operation (USB 2.0) CONFIG_USBDEV_SELFPOWERED - Will cause USB features to indicate that the device is self-powered CONFIG_USBDEV_MAXPOWER - Maximum power consumption in mA CONFIG_USBDEV_TRACE - Enables USB tracing for debug CONFIG_USBDEV_TRACE_NRECORDS - Number of trace entries to remember USB host controller driver CONFIG_USBHOST Enables USB host support CONFIG_USBHOST_NPREALLOC Number of pre-allocated class instances CONFIG_USBHOST_BULK_DISABLE On some architectures, selecting this setting will reduce driver size by disabling bulk endpoint support CONFIG_USBHOST_INT_DISABLE On some architectures, selecting this setting will reduce driver size by disabling interrupt endpoint support CONFIG_USBHOST_ISOC_DISABLE On some architectures, selecting this setting will reduce driver size by disabling isochronous endpoint support USB host HID class driver. Requires CONFIG_USBHOST=y, CONFIG_USBHOST_INT_DISABLE=n, CONFIG_NFILE_DESCRIPTORS > 0, CONFIG_SCHED_WORKQUEUE=y, and CONFIG_DISABLE_SIGNALS=n. CONFIG_HIDKBD_POLLUSEC Device poll rate in microseconds. Default: 100 milliseconds. CONFIG_HIDKBD_DEFPRIO Priority of the polling thread. Default: 50. CONFIG_HIDKBD_STACKSIZE Stack size for polling thread. Default: 1024 CONFIG_HIDKBD_BUFSIZE Scancode buffer size. Default: 64. CONFIG_HIDKBD_NPOLLWAITERS If the poll() method is enabled, this defines the maximum number of threads that can be waiting for keyboard events. Default: 2. CONFIG_HIDKBD_RAWSCANCODES If set to y no conversion will be made on the raw keyboard scan codes. Default: ASCII conversion. CONFIG_HIDKBD_ALLSCANCODES' If set to y all 231 possible scancodes will be converted to something. Default: 104 key US keyboard. CONFIG_HIDKBD_NODEBOUNCE If set to y normal debouncing is disabled. Default: Debounce enabled (No repeat keys). USB host mass storage class driver. Requires CONFIG_USBHOST=y, CONFIG_USBHOST_BULK_DISABLE=n, CONFIG_NFILE_DESCRIPTORS > 0, and CONFIG_SCHED_WORKQUEUE=y USB serial device class driver (Prolific PL2303 Emulation) CONFIG_PL2303 Enable compilation of the USB serial driver CONFIG_PL2303_EPINTIN The logical 7-bit address of a hardware endpoint that supports interrupt IN operation CONFIG_PL2303_EPBULKOUT The logical 7-bit address of a hardware endpoint that supports bulk OUT operation CONFIG_PL2303_EPBULKIN The logical 7-bit address of a hardware endpoint that supports bulk IN operation CONFIG_PL2303_NWRREQS and CONFIG_PL2303_NRDREQS The number of write/read requests that can be in flight CONFIG_PL2303_VENDORID and CONFIG_PL2303_VENDORSTR The vendor ID code/string CONFIG_PL2303_PRODUCTID and CONFIG_PL2303_PRODUCTSTR The product ID code/string CONFIG_PL2303_RXBUFSIZE and CONFIG_PL2303_TXBUFSIZE Size of the serial receive/transmit buffers USB serial device class driver (Standard CDC ACM class) CONFIG_CDCACM Enable compilation of the USB serial driver CONFIG_CDCACM_COMPOSITE Configure the CDC serial driver as part of a composite driver (only if CONFIG_USBDEV_COMPOSITE is also defined) CONFIG_CDCACM_IFNOBASE If the CDC driver is part of a composite device, then this may need to be defined to offset the CDC/ACM interface numbers so that they are unique and contiguous. When used with the Mass Storage driver, the correct value for this offset is zero. CONFIG_CDCACM_STRBASE If the CDC driver is part of a composite device, then this may need to be defined to offset the CDC/ACM string numbers so that they are unique and contiguous. When used with the Mass Storage driver, the correct value for this offset is four (this value actuallly only needs to be defined if names are provided for the Notification interface, CONFIG_CDCACM_NOTIFSTR, or the data interface, CONFIG_CDCACM_DATAIFSTR). CONFIG_CDCACM_EP0MAXPACKET Endpoint 0 max packet size. Default 64. CONFIG_CDCACM_EPINTIN The logical 7-bit address of a hardware endpoint that supports interrupt IN operation. Default 2. CONFIG_CDCACM_EPINTIN_FSSIZE Max package size for the interrupt IN endpoint if full speed mode. Default 64. CONFIG_CDCACM_EPINTIN_HSSIZE Max package size for the interrupt IN endpoint if high speed mode. Default 64. CONFIG_CDCACM_EPBULKOUT The logical 7-bit address of a hardware endpoint that supports bulk OUT operation CONFIG_CDCACM_EPBULKOUT_FSSIZE Max package size for the bulk OUT endpoint if full speed mode. Default 64. CONFIG_CDCACM_EPBULKOUT_HSSIZE Max package size for the bulk OUT endpoint if high speed mode. Default 512. CONFIG_CDCACM_EPBULKIN The logical 7-bit address of a hardware endpoint that supports bulk IN operation CONFIG_CDCACM_EPBULKIN_FSSIZE Max package size for the bulk IN endpoint if full speed mode. Default 64. CONFIG_CDCACM_EPBULKIN_HSSIZE Max package size for the bulk IN endpoint if high speed mode. Default 512. CONFIG_CDCACM_NWRREQS and CONFIG_CDCACM_NRDREQS The number of write/read requests that can be in flight. CONFIG_CDCACM_NWRREQS includes write requests used for both the interrupt and bulk IN endpoints. Default 4. CONFIG_CDCACM_VENDORID and CONFIG_CDCACM_VENDORSTR The vendor ID code/string. Default 0x0525 and "NuttX" 0x0525 is the Netchip vendor and should not be used in any products. This default VID was selected for compatibility with the Linux CDC ACM default VID. CONFIG_CDCACM_PRODUCTID and CONFIG_CDCACM_PRODUCTSTR The product ID code/string. Default 0xa4a7 and "CDC/ACM Serial" 0xa4a7 was selected for compatibility with the Linux CDC ACM default PID. CONFIG_CDCACM_RXBUFSIZE and CONFIG_CDCACM_TXBUFSIZE Size of the serial receive/transmit buffers. Default 256. USB Storage Device Configuration CONFIG_USBMSC Enable compilation of the USB storage driver CONFIG_USBMSC_COMPOSITE Configure the mass storage driver as part of a composite driver (only if CONFIG_USBDEV_COMPOSITE is also defined) CONFIG_USBMSC_IFNOBASE If the CDC driver is part of a composite device, then this may need to be defined to offset the mass storage interface number so that it is unique and contiguous. When used with the CDC/ACM driver, the correct value for this offset is two (because of the two CDC/ACM interfaces that will precede it). CONFIG_USBMSC_STRBASE If the CDC driver is part of a composite device, then this may need to be defined to offset the mass storage string numbers so that they are unique and contiguous. When used with the CDC/ACM driver, the correct value for this offset is four (or perhaps 5 or 6, depending on if CONFIG_CDCACM_NOTIFSTR or CONFIG_CDCACM_DATAIFSTR are defined). CONFIG_USBMSC_EP0MAXPACKET Max packet size for endpoint 0 CONFIG_USBMSCEPBULKOUT and CONFIG_USBMSC_EPBULKIN The logical 7-bit address of a hardware endpoints that support bulk OUT and IN operations CONFIG_USBMSC_NWRREQS and CONFIG_USBMSC_NRDREQS The number of write/read requests that can be in flight CONFIG_USBMSC_BULKINREQLEN and CONFIG_USBMSC_BULKOUTREQLEN The size of the buffer in each write/read request. This value needs to be at least as large as the endpoint maxpacket and ideally as large as a block device sector. CONFIG_USBMSC_VENDORID and CONFIG_USBMSC_VENDORSTR The vendor ID code/string CONFIG_USBMSC_PRODUCTID and CONFIG_USBMSC_PRODUCTSTR The product ID code/string CONFIG_USBMSC_REMOVABLE Select if the media is removable USB Composite Device Configuration CONFIG_USBDEV_COMPOSITE Enables USB composite device support CONFIG_CDCACM_COMPOSITE Configure the CDC serial driver as part of a composite driver (only if CONFIG_USBDEV_COMPOSITE is also defined) CONFIG_USBMSC_COMPOSITE Configure the mass storage driver as part of a composite driver (only if CONFIG_USBDEV_COMPOSITE is also defined) CONFIG_COMPOSITE_IAD If one of the members of the composite has multiple interfaces (such as CDC/ACM), then an Interface Association Descriptor (IAD) will be necessary. Default: IAD will be used automatically if needed. It should not be necessary to set this. CONFIG_COMPOSITE_EP0MAXPACKET Max packet size for endpoint 0 CONFIG_COMPOSITE_VENDORID and CONFIG_COMPOSITE_VENDORSTR The vendor ID code/string CONFIG_COMPOSITE_PRODUCTID and CONFIG_COMPOSITE_PRODUCTSTR The product ID code/string CONFIG_COMPOSITE_SERIALSTR Device serial number string CONFIG_COMPOSITE_CONFIGSTR Configuration string CONFIG_COMPOSITE_VERSIONNO Interface version number. Graphics related configuration settings CONFIG_NX Enables overall support for graphics library and NX CONFIG_NX_MULTIUSER Configures NX in multi-user mode CONFIG_NX_NPLANES Some YUV color formats requires support for multiple planes, one for each color component. Unless you have such special hardware, this value should be undefined or set to 1. CONFIG_NX_DISABLE_1BPP, CONFIG_NX_DISABLE_2BPP, CONFIG_NX_DISABLE_4BPP, CONFIG_NX_DISABLE_8BPP, CONFIG_NX_DISABLE_16BPP, CONFIG_NX_DISABLE_24BPP, and CONFIG_NX_DISABLE_32BPP NX supports a variety of pixel depths. You can save some memory by disabling support for unused color depths. CONFIG_NX_PACKEDMSFIRST If a pixel depth of less than 8-bits is used, then NX needs to know if the pixels pack from the MS to LS or from LS to MS CONFIG_NX_LCDDRIVER By default, NX builds to use a framebuffer driver (see include/nuttx/fb.h). If this option is defined, NX will build to use an LCD driver (see include/nuttx/lcd/lcd.h). CONFIG_LCD_MAXPOWER - The full-on power setting for an LCD device. CONFIG_LCD_MAXCONTRAST - The maximum contrast value for an LCD device. CONFIG_LCD_LANDSCAPE, CONFIG_LCD_PORTRAIT, CONFIG_LCD_RLANDSCAPE, and CONFIG_LCD_RPORTRAIT - Some LCD drivers may support these options to present the display in landscape, portrait, reverse landscape, or reverse portrait orientations. Check the README.txt file in each board configuration directory to see if any of these are supported by the board LCD logic. CONFIG_NX_MOUSE Build in support for mouse input. CONFIG_NX_KBD Build in support of keypad/keyboard input. CONFIG_NXTK_BORDERWIDTH Specifies with with of the border (in pixels) used with framed windows. The default is 4. CONFIG_NXTK_BORDERCOLOR1 and CONFIG_NXTK_BORDERCOLOR2 Specify the colors of the border used with framed windows. CONFIG_NXTK_BORDERCOLOR2 is the shadow side color and so is normally darker. The default is medium and dark grey, respectively CONFIG_NXTK_AUTORAISE If set, a window will be raised to the top if the mouse position is over a visible portion of the window. Default: A mouse button must be clicked over a visible portion of the window. CONFIG_NXFONTS_CHARBITS The number of bits in the character set. Current options are only 7 and 8. The default is 7. CONFIG_NXFONT_SANS23X27 This option enables support for a tiny, 23x27 san serif font (font ID FONTID_SANS23X27 == 1). CONFIG_NXFONT_SANS22X29 This option enables support for a small, 22x29 san serif font (font ID FONTID_SANS22X29 == 2). CONFIG_NXFONT_SANS28X37 This option enables support for a medium, 28x37 san serif font (font ID FONTID_SANS28X37 == 3). CONFIG_NXFONT_SANS39X48 This option enables support for a large, 39x48 san serif font (font ID FONTID_SANS39X48 == 4). CONFIG_NXFONT_SANS22X29B This option enables support for a small, 22x29 san serif bold font (font ID FONTID_SANS22X29B == 5). CONFIG_NXFONT_SANS28X37B This option enables support for a medium, 28x37 san serif bold font (font ID FONTID_SANS28X37B == 6). CONFIG_NXFONT_SANS40X49B This option enables support for a large, 40x49 san serif bold font (font ID FONTID_SANS40X49B == 7). CONFIG_NXFONT_SERIF22X29 This option enables support for a small, 22x29 font (with serifs) (font ID FONTID_SERIF22X29 == 8). CONFIG_NXFONT_SERIF29X37 This option enables support for a medium, 29x37 font (with serifs) (font ID FONTID_SERIF29X37 == 9). CONFIG_NXFONT_SERIF38X48 This option enables support for a large, 38x48 font (with serifs) (font ID FONTID_SERIF38X48 == 10). CONFIG_NXFONT_SERIF22X28B This option enables support for a small, 27x38 bold font (with serifs) (font ID FONTID_SERIF22X28B == 11). CONFIG_NXFONT_SERIF27X38B This option enables support for a medium, 27x38 bold font (with serifs) (font ID FONTID_SERIF27X38B == 12). CONFIG_NXFONT_SERIF38X49B This option enables support for a large, 38x49 bold font (with serifs) (font ID FONTID_SERIF38X49B == 13). NX Multi-user only options: CONFIG_NX_BLOCKING Open the client message queues in blocking mode. In this case, nx_eventhandler() will never return. CONFIG_NX_MXSERVERMSGS and CONFIG_NX_MXCLIENTMSGS Specifies the maximum number of messages that can fit in the message queues. No additional resources are allocated, but this can be set to prevent flooding of the client or server with too many messages (CONFIG_PREALLOC_MQ_MSGS controls how many messages are pre-allocated). Stack and heap information CONFIG_BOOT_RUNFROMFLASH - Some configurations support XIP operation from FLASH but must copy initialized .data sections to RAM. CONFIG_BOOT_COPYTORAM - Some configurations boot in FLASH but copy themselves entirely into RAM for better performance. CONFIG_BOOT_RAMFUNCS - Other configurations may copy just some functions into RAM, either for better performance or for errata workarounds. CONFIG_STACK_POINTER - The initial stack pointer (may not be supported in all architectures). CONFIG_STACK_ALIGNMENT - Set if the your application has specific stack alignment requirements (may not be supported in all architectures). CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack. This is the thread that (1) performs the inital boot of the system up to the point where user_start() is spawned, and (2) there after is the IDLE thread that executes only when there is no other thread ready to run. CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate for the main user thread that begins at the user_start() entry point. CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size CONFIG_HEAP_BASE - The beginning of the heap CONFIG_HEAP_SIZE - The size of the heap appconfig -- This is another configuration file that is specific to the application. This file is copied into the application build directory when NuttX is configured. See ../apps/README.txt for further details. setenv.sh -- This is a script that you can include that will be installed at the toplevel of the directory structure and can be sourced to set any necessary environment variables. You will most likely have to customize the default setenv.sh script in order for it to work correctly in your environment. Supported Boards ^^^^^^^^^^^^^^^^ configs/amber This is placeholder for the SoC Robotics Amber Web Server that is based on the Atmel AVR ATMega128 MCU. There is not much there yet and what is there is untested due to tool-related issues. configs/avr32dev1 This is a port of NuttX to the Atmel AVR32DEV1 board. That board is based on the Atmel AT32UC3B0256 MCU and uses a specially patched version of the GNU toolchain: The patches provide support for the AVR32 family. That patched GNU toolchain is available only from the Atmel website. STATUS: This port is functional but very basic. There are configurations for NSH and the OS test. configs/c5471evm This is a port to the Spectrum Digital C5471 evaluation board. The TMS320C5471 is a dual core processor from TI with an ARM7TDMI general purpose processor and a c54 DSP. It is also known as TMS320DA180 or just DA180. NuttX runs on the ARM core and is built with a GNU arm-elf toolchain*. This port is complete and verified. configs/compal_e88 and compal_e99 These directories contain the board support for compal e88 and e99 phones. These ports are based on patches contributed by Denis Carikli for both the compal e99 and e88. The patches were made by Alan Carvalho de Assis and Denis Carikli using the Stefan Richter's Osmocom-bb patches. configs/demo9s12ne64 Freescale DMO9S12NE64 board based on the MC9S12NE64 hcs12 cpu. This port uses the m9s12x GCC toolchain. STATUS: (Still) under development; it is code complete but has not yet been verified. configs/ea3131 Embedded Artists EA3131 Development board. This board is based on the an NXP LPC3131 MCU. This OS is built with the arm-elf toolchain*. STATUS: This port is complete and mature. configs/ea3152 Embedded Artists EA3152 Development board. This board is based on the an NXP LPC3152 MCU. This OS is built with the arm-elf toolchain*. STATUS: This port is has not be exercised well, but since it is a simple derivative of the ea3131, it should be fully functional. configs/eagle100 Micromint Eagle-100 Development board. This board is based on the an ARM Cortex-M3 MCU, the Luminary LM3S6918. This OS is built with the arm-elf toolchain*. STATUS: This port is complete and mature. configs/ekk-lm3s9b96 TI/Stellaris EKK-LM3S9B96 board. This board is based on the an EKK-LM3S9B96 which is a Cortex-M3. configs/ez80f0910200kitg ez80Acclaim! Microcontroller. This port use the Zilog ez80f0910200kitg development kit, eZ80F091 part, and the Zilog ZDS-II Windows command line tools. The development environment is Cygwin under WinXP. configs/ez80f0910200zco ez80Acclaim! Microcontroller. This port use the Zilog ez80f0910200zco development kit, eZ80F091 part, and the Zilog ZDS-II Windows command line tools. The development environment is Cygwin under WinXP. configs/hymini-stm32v A configuration for the HY-Mini STM32v board. This board is based on the STM32F103VCT chip. configs/kwikstik-k40. Kinetis K40 Cortex-M4 MCU. This port uses the FreeScale KwikStik-K40 development board. configs/lincoln60 NuttX port to the Micromint Lincoln 60 board. configs/lm3s6432-s2e Stellaris RDK-S2E Reference Design Kit and the MDL-S2E Ethernet to Serial module. configs/lm3s6965-ek Stellaris LM3S6965 Evaluation Kit. This board is based on the an ARM Cortex-M3 MCU, the Luminary/TI LM3S6965. This OS is built with the arm-elf toolchain*. STATUS: This port is complete and mature. configs/lm3s8962-ek Stellaris LMS38962 Evaluation Kit. configs/lpcxpresso-lpc1768 Embedded Artists base board with NXP LPCExpresso LPC1768. This board is based on the NXP LPC1768. The Code Red toolchain is used by default. STATUS: Under development. configs/lpc4330-xplorer NuttX port to the LPC4330-Xplorer board from NGX Technologies featuring the NXP LPC4330FET100 MCU configs/m68322evb This is a work in progress for the venerable m68322evb board from Motorola. This OS is also built with the arm-elf toolchain*. STATUS: This port was never completed. configs/mbed The configurations in this directory support the mbed board (http://mbed.org) that features the NXP LPC1768 microcontroller. This OS is also built with the arm-elf toolchain*. STATUS: Contributed. configs/mcu123-lpc214x This port is for the NXP LPC2148 as provided on the mcu123.com lpc214x development board. This OS is also built with the arm-elf toolchain*. The port supports serial, timer0, spi, and usb. configs/micropendous3 This is a port to the Opendous Micropendous 3 board. This board may be populated with either an AVR AT90USB646, 647, 1286, or 1287 MCU. Support is configured for the AT90USB647. configs/mirtoo This is the port to the DTX1-4000L "Mirtoo" module. This module uses MicroChip PIC32MX250F128D. See http://www.dimitech.com/ for further information. configs/mx1ads This is a port to the Motorola MX1ADS development board. That board is based on the Freescale i.MX1 processor. The i.MX1 is an ARM920T. STATUS: This port is nearly code complete but was never fully integrated due to tool-related issues. configs/ne64badge Future Electronics Group NE64 /PoE Badge board based on the MC9S12NE64 hcs12 cpu. This port uses the m9s12x GCC toolchain. STATUS: Under development. The port is code-complete but has not yet been fully tested. configs/ntosd-dm320 This port uses the Neuros OSD v1.0 Dev Board with a GNU arm-elf toolchain*: see http://wiki.neurostechnology.com/index.php/OSD_1.0_Developer_Home There are some differences between the Dev Board and the currently available commercial v1.0 Boards. See http://wiki.neurostechnology.com/index.php/OSD_Developer_Board_v1 NuttX operates on the ARM9EJS of this dual core processor. STATUS: This port is code complete, verified, and included in the NuttX 0.2.1 release. configs/nucleus2g This port uses the Nucleus 2G board (with Babel CAN board). This board features an NXP LPC1768 processor. See the 2G website (http://www.2g-eng.com/) for more information about the Nucleus 2G. configs/olimex-lpc1766stk This port uses the Olimex LPC1766-STK board and a GNU GCC toolchain* under Linux or Cygwin. STATUS: Complete and mature. configs/olimex-lpc2378 This port uses the Olimex-lpc2378 board and a GNU arm-elf toolchain* under Linux or Cygwin. STATUS: ostest and NSH configurations available. This port for the NXP LPC2378 was contributed by Rommel Marcelo. configs/olimex-stm32-p107 This port uses the Olimex STM32-P107 board (STM32F107VC) and a GNU arm-elf toolchain* under Linux or Cygwin. See the https://www.olimex.com/dev/stm32-p107.html for further information. Contributed by Max Holtzberg. STATUS: Configurations for the basic OS test and NSH are available and verified. configs/olimex-strp711 This port uses the Olimex STR-P711 board and a GNU arm-elf toolchain* under Linux or Cygwin. See the http://www.olimex.com/dev/str-p711.html" for further information. STATUS: Configurations for the basic OS test and NSH are complete and verified. configs/pcblogic-pic32mx This is the port of NuttX to the PIC32MX board from PCB Logic Design Co. This board features the MicroChip PIC32MX460F512L. The board is a very simple -- little more than a carrier for the PIC32 MCU plus voltage regulation, debug interface, and an OTG connector. STATUS: Code complete but testing has been stalled due to tool related problems (PICkit 2 does not work with the PIC32). configs/pic32-starterkit This directory contains the port of NuttX to the Microchip PIC32 Ethernet Starter Kit (DM320004) with the Multimedia Expansion Board (MEB, DM320005). See www.microchip.com for further information. configs/pic32mx7mmb This directory will (eventually) contain the port of NuttX to the Mikroelektronika PIC32MX7 Multimedia Board (MMB). See http://www.mikroe.com/ for further information. STATUS: Basic OS test configuration is in place, but the board does not boot. It looks like I will need an ICD3 in order to debug the code (PICkit3 doesn't work for debug with this board). This effort is temporarily stalled. configs/pjrc-8051 8051 Microcontroller. This port uses the PJRC 87C52 development system and the SDCC toolchain. This port is not quite ready for prime time. configs/qemu-i486 Port of NuttX to QEMU in i486 mode. This port will also run on real i486 hardwared (Google the Bifferboard). configs/rgmp RGMP stands for RTOS and GPOS on Multi-Processor. RGMP is a project for running GPOS and RTOS simultaneously on multi-processor platforms. You can port your favorite RTOS to RGMP together with an unmodified Linux to form a hybrid operating system. This makes your application able to use both RTOS and GPOS features. See http://rgmp.sourceforge.net/wiki/index.php/Main_Page for further information about RGMP. configs/sam3u-ek The port of NuttX to the Atmel SAM3U-EK development board. configs/sim A user-mode port of NuttX to the x86 Linux platform is available. The purpose of this port is primarily to support OS feature development. This port does not support interrupts or a real timer (and hence no round robin scheduler) Otherwise, it is complete. configs/skp16c26 Renesas M16C processor on the Renesas SKP16C26 StarterKit. This port uses the GNU m32c toolchain. STATUS: The port is complete but untested due to issues with compiler internal errors. configs/stm3210e-eval STMicro STM3210E-EVAL development board based on the STMicro STM32F103ZET6 microcontroller (ARM Cortex-M3). This port uses the GNU Cortex-M3 toolchain. configs/stm3220g-eval STMicro STM3220G-EVAL development board based on the STMicro STM32F407IG microcontroller (ARM Cortex-M3). configs/stm3240g-eval STMicro STM3240G-EVAL development board based on the STMicro STM32F103ZET6 microcontroller (ARM Cortex-M4 with FPU). This port uses a GNU Cortex-M4 toolchain (such as CodeSourcery). configs/stm32f4discovery STMicro STM32F4-Discovery board boased on the STMIcro STM32F407VGT6 MCU. configs/sure-pic32mx The "Advanced USB Storage Demo Board," Model DB-DP11215, from Sure Electronics (http://www.sureelectronics.net/). This board features the MicroChip PIC32MX440F512H. See also http://www.sureelectronics.net/goods.php?id=1168 for further information about the Sure DB-DP11215 board. configs/teensy This is the port of NuttX to the PJRC Teensy++ 2.0 board. This board is developed by http://pjrc.com/teensy/. The Teensy++ 2.0 is based on an Atmel AT90USB1286 MCU. configs/twr-k60n512 Kinetis K60 Cortex-M4 MCU. This port uses the FreeScale TWR-K60N512 development board. configs/ubw32 This is the port to the Sparkfun UBW32 board. This port uses the original v2.4 board which is based on the MicroChip PIC32MX460F512L. See http://www.sparkfun.com/products/8971. This older version has been replaced with this board http://www.sparkfun.com/products/9713. See also http://www.schmalzhaus.com/UBW32/. configs/us7032evb1 This is a port of the Hitachi SH-1 on the Hitachi SH-1/US7032EVB1 board. STATUS: Work has just began on this port. configs/vsn ISOTEL NetClamps VSN V1.2 ready2go sensor network platform based on the STMicro STM32F103RET6. Contributed by Uros Platise. See http://isotel.eu/NetClamps/ configs/xtrs TRS80 Model 3. This port uses a vintage computer based on the Z80. An emulator for this computer is available to run TRS80 programs on a linux platform (http://www.tim-mann.org/xtrs.html). configs/z16f2800100zcog z16f Microcontroller. This port use the Zilog z16f2800100zcog development kit and the Zilog ZDS-II Windows command line tools. The development environment is Cygwin under WinXP. configs/z80sim z80 Microcontroller. This port uses a Z80 instruction set simulator. That simulator can be found in the NuttX SVN at http://nuttx.svn.sourceforge.net/viewvc/nuttx/trunk/misc/sims/z80sim. This port also uses the SDCC toolchain (http://sdcc.sourceforge.net/") (verified with version 2.6.0). configs/z8encore000zco z8Encore! Microcontroller. This port use the Zilog z8encore000zco development kit, Z8F6403 part, and the Zilog ZDS-II Windows command line tools. The development environment is Cygwin under WinXP. configs/z8f64200100kit z8Encore! Microcontroller. This port use the Zilog z8f64200100kit development kit, Z8F6423 part, and the Zilog ZDS-II Windows command line tools. The development environment is Cygwin under WinXP. Configuring NuttX ^^^^^^^^^^^^^^^^^ Configuring NuttX requires only copying configs///Make.def to ${TOPDIR}/Make.defs configs///setenv.sh to ${TOPDIR}/setenv.sh configs///defconfig to ${TOPDIR}/.config And if configs///appconfig exists in the board configuration directory: Copy configs///appconfig to /.config echo "APPS_LOC=\"\"" >> "${TOPDIR}/.config" tools/configure.sh There is a script that automates these steps. The following steps will accomplish the same configuration: cd tools ./configure.sh / And if configs///appconfig exists and your application directory is not in the standard loction (../apps), then you should also specify the location of the application directory on the command line like: cd tools ./configure.sh -a / Building Symbol Tables ^^^^^^^^^^^^^^^^^^^^^^ Symbol tables are needed at several of the binfmt interfaces in order to bind a module to the base code. These symbol tables can be tricky to create and will probably have to be tailored for any specific application, balancing the number of symbols and the size of the symbol table against the symbols required by the applications. The top-level System.map file is one good source of symbol information (which, or course, was just generated from the top-level nuttx file using the GNU 'nm' tool). There are also common-separated value (CSV) values in the source try that provide information about symbols. In particular: nuttx/syscall/syscall.csv - Describes the NuttX RTOS interface, and nuttx/lib/lib.csv - Describes the NuttX C library interface. There is a tool at nuttx/tools/mksymtab that will use these CSV files as input to generate a generic symbol table. See nuttx/tools/README.txt for more information about using the mksymtab tool.