Board-Specific Configurations ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Table of Contents ^^^^^^^^^^^^^^^^^ o Board-Specific Configurations o Summary of Files o Supported Architectures o Configuring NuttX 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: |-- include/ | `-- (board-specific header files) |-- src/ | |-- Makefile | `-- (board-specific source files) |-- | |-- Make.defs | |-- defconfig | `-- setenv.sh |-- | |-- Make.defs | |-- defconfig | `-- setenv.sh ... Summary of Files ^^^^^^^^^^^^^^^^ 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_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 configuratins Make.defs file. General OS setup CONFIG_EXAMPLE - identifies the subdirectory in examples that will be used in the build CONFIG_DEBUG - enables built-in debug options CONFIG_DEBUG_VERBOSE - enables verbose 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_TICKS_PER_MSEC - The default system timer is 100Hz or TICKS_PER_MSEC=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. 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. 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. 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. 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: 50 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 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. 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_BZERO CONFIG_ARCH_KMALLOC, CONFIG_ARCH_KZMALLOC, CONFIG_ARCH_KFREE Sizes of configurable things (0 disables) CONFIG_MAX_TASKS - The maximum number of simultaneously active tasks. This value must be a power of two. CONFIG_NPTHREAD_KEYS - The number of items of thread- specific data that can be retained CONFIG_NFILE_DESCRIPTORS - The maximum number of file descriptors (one for each open) CONFIG_NFILE_STREAMS - The maximum number of streams that can be fopen'ed CONFIG_NAME_MAX - The maximum size of a file name. CONFIG_STDIO_BUFFER_SIZE - Size of the buffer to allocate on fopen. (Only if CONFIG_NFILE_STREAMS > 0) 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_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_FS_ROMFS - Enable ROMFS filesystem support 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-based MMC/SD driver CONFIG_FS_READAHEAD - Enable read-ahead buffering CONFIG_FS_WRITEBUFFER - Enable write buffering CONFIG_SDIO_DMA - SDIO driver supports DMA CONFIG_MMCSD_MMCSUPPORT - Enable support for MMC cards CONFIG_MMCSD_HAVECARDDETECT - SDIO driver card detection is 100% accurate TCP/IP and UDP support via uIP CONFIG_NET - Enable or disable all network features 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_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_BROADCAST - Incoming UDP broadcast support CONFIG_NET_MULTICAST - Outgoing multi-cast address support CONFIG_NET_LLH_LEN - The link level header length CONFIG_NET_FWCACHE_SIZE - number of packets to remember when looking for duplicates 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. USB device controller driver CONFIG_USBDEV - Enables USB 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 serial device class driver CONFIG_USBSER Enable compilation of the USB serial driver CONFIG_USBSER_EPINTIN The logical 7-bit address of a hardware endpoint that supports interrupt IN operation CONFIG_USBSER_EPBULKOUT The logical 7-bit address of a hardware endpoint that supports bulk OUT operation CONFIG_USBSER_EPBULKIN The logical 7-bit address of a hardware endpoint that supports bulk IN operation CONFIG_USBSER_NWRREQS and CONFIG_USBSER_NRDREQS The number of write/read requests that can be in flight CONFIG_USBSER_VENDORID and CONFIG_USBSER_VENDORSTR The vendor ID code/string CONFIG_USBSER_PRODUCTID and CONFIG_USBSER_PRODUCTSTR The product ID code/string CONFIG_USBSER_RXBUFSIZE and CONFIG_USBSER_TXBUFSIZE Size of the serial receive/transmit buffers USB Storage Device Configuration CONFIG_USBSTRG Enable compilation of the USB storage driver CONFIG_USBSTRG_EP0MAXPACKET Max packet size for endpoint 0 CONFIG_USBSTRGEPBULKOUT and CONFIG_USBSTRG_EPBULKIN The logical 7-bit address of a hardware endpoints that support bulk OUT and IN operations CONFIG_USBSTRG_NWRREQS and CONFIG_USBSTRG_NRDREQS The number of write/read requests that can be in flight CONFIG_USBSTRG_BULKINREQLEN and CONFIG_USBSTRG_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_USBSTRG_VENDORID and CONFIG_USBSTRG_VENDORSTR The vendor ID code/string CONFIG_USBSTRG_PRODUCTID and CONFIG_USBSTRG_PRODUCTSTR The product ID code/string CONFIG_USBSTRG_REMOVABLE Select if the media is removable 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.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_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_SANS At present, there is only one font. But if there were were more, then this option would select the sans serif font. 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_STACK_POINTER - The initial stack pointer 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 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. Supported Boards ^^^^^^^^^^^^^^^^ 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, verified, and included in the NuttX release. configs/demo9s12ne64 Feescale DMO9S12NE64 board based on the MC9S12NE64 hcs12 cpu. This port uses the m68hc12 GCC toolchain. STATUS: Under development. 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/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/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 under development. 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*. 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/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 still under development (work is stalled until I devote time to the Micromint Eagle-100) configs/ntosd-dm320 This port uses the Neuros OSD with a GNU arm-elf toolchain*: see http://wiki.neurostechnology.com/index.php/Developer_Welcome . 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/olimex-lpc2378 This port uses the Olimex Olimex-lpc2378 board arm-elf toolchain* under Linux or Cygwin. STATUS: ostest and NSH configurations available. configs/olimex-strp711 This port uses the Olimex STR-P711 board arm-elf toolchain* under Linux or Cygwin. See the http://www.olimex.com/dev/str-p711.html" for futher information. STATUS: Coding for the basic port -- serial console and system timer -- is complete but untested to problems I am having using OpenOCD with a wiggler clone JTAG. 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/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. NOTE: This target will not run on Cygwin probably for many reasons but first off because it uses some of the same symbols as does cygwin.dll. configs/skp16c26 Renesas M16C processor on the Renesas SKP16C26 StarterKit. This port uses the GNU m32c toolchain. configs/stm3210e-evel STMicrco STM3210E-EVAL development board based on the STMicro STM32F103ZET6 microcontroller (ARM Cortex-M3). This port uses the GNU Cortex-M3 toolchain. 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/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 CVS at http://nuttx.cvs.sourceforge.net/nuttx/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. Other ports for the for the TI TMS320DM270, M683222 and for MIPS are in various states of progress 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 tools/configure.sh There is a script that automates these steps. The following steps will accomplish the same configuration: cd tools ./configure.sh /