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/<arch-name>/ 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/<arch-name>/ 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/<board-name>/ sub-directories and are discussed in this
README. Additional configuration information maybe available in
board-specific configs/<board-name>/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 <board-name> under configs/ with the
following characteristics:
<board-name>
|-- include/
| `-- (board-specific header files)
|-- src/
| |-- Makefile
| `-- (board-specific source files)
|-- <config1-dir>
| |-- Make.defs
| |-- defconfig
| `-- setenv.sh
|-- <config2-dir>
| |-- 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 <arch/board/header.h>'. These header file
can only be included by files in arch/<arch-name>include/ and
arch/<arch-name>/src
src/ -- This directory contains board specific drivers. This
directory will be linked as arch/<arch-name>/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 (<config1-dir>,
<config2-dir>, .. 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 <prefix>/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 <user's homedir>/<postfix>. 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_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/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-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/<board-name>/<config-dir>/Make.def to ${TOPDIR}/Make.defs
configs/<board-name>/<config-dir>/setenv.sh to ${TOPDIR}/setenv.sh
configs/<board-name>/<config-dir>/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 <board-name>/<config-dir>
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