examples
^^^^^^^^
Selecting examples:
The examples directory contains several sample applications that
can be linked with NuttX. The specific example is selected in the
configs/<board-name>/defconfig file via the CONFIG_EXAMPLES_xyz
setting where xyz is the name of the example. For example,
CONFIG_EXAMPLES_OSTEST=y
Selects the examples/ostest example.
Built-In functions
Some of the examples may be built as "built-in" functions that
can be executed at run time (rather than as NuttX "main" programs).
These "built-in" examples can be also be executed from the NuttShell
(NSH) command line. In order to configure these built-in NSH
functions, you have to set up the following:
- CONFIG_NSH_BUILTIN_APPS - Enable support for external registered,
"named" applications that can be executed from the NSH
command line (see apps/README.txt for more information).
examples/adc
^^^^^^^^^^^^
A mindlessly simple test of an ADC devices. It simply reads from the
ADC device and dumps the data to the console forever.
This test depends on these specific ADC/NSH configurations settings (your
specific ADC settings might require additional settings).
CONFIG_ADC - Enabled ADC support
CONFIG_NSH_BUILTIN_APPS - Build the ADC test as an NSH built-in function.
Default: Built as a standalone problem
Specific configuration options for this example include:
CONFIG_EXAMPLES_ADC_DEVPATH - The default path to the ADC device. Default: /dev/adc0
CONFIG_EXAMPLES_ADC_NSAMPLES - If CONFIG_NSH_BUILTIN_APPS
is defined, then the number of samples is provided on the command line
and this value is ignored. Otherwise, this number of samples is
collected and the program terminates. Default: Samples are collected
indefinitely.
CONFIG_EXAMPLES_ADC_GROUPSIZE - The number of samples to read at once.
Default: 4
examples/buttons
^^^^^^^^^^^^^^^^
This is a simple configuration that may be used to test the board-
specific button interfaces. Configuration options:
CONFIG_ARCH_BUTTONS - Must be defined for button support
CONFIG_EXAMPLES_BUTTONS_MIN - Lowest button number (MIN=0)
CONFIG_EXAMPLES_BUTTONS_MAX - Highest button number (MAX=7)
CONFIG_ARCH_IRQBUTTONS - Must be defined for interrupting button support
CONFIG_EXAMPLES_IRQBUTTONS_MIN - Lowest interrupting button number (MIN=0)
CONFIG_EXAMPLES_IRQBUTTONS_MAX - Highest interrupting button number (MAX=7)
Name strings for buttons:
CONFIG_EXAMPLES_BUTTONS_NAME0, CONFIG_EXAMPLES_BUTTONS_NAME1,
CONFIG_EXAMPLES_BUTTONS_NAME2, CONFIG_EXAMPLES_BUTTONS_NAME3,
CONFIG_EXAMPLES_BUTTONS_NAME4, CONFIG_EXAMPLES_BUTTONS_NAME5,
CONFIG_EXAMPLES_BUTTONS_NAME6, CONFIG_EXAMPLES_BUTTONS_NAME7,
Additional architecture-/board- specific configuration settings may also
be required.
NOTE: This test exercises internal button driver interfaces. As such, it
relies on internal OS interfaces that are not normally available to a
user-space program. As a result, this example cannot be used if a
NuttX is built as a protected, supervisor kernel (CONFIG_NUTTX_KERNEL).
examples/can
^^^^^^^^^^^^
If the CAN device is configured in loopback mode, then this example can
be used to test the CAN device in loop back mode. It simple sinces a
sequence of CAN messages and verifies that those messages are returned
exactly as sent.
This test depends on these specific CAN/NSH configurations settings (your
specific CAN settings might require additional settings).
CONFIG_CAN - Enables CAN support.
CONFIG_CAN_LOOPBACK - A CAN driver may or may not support a loopback
mode for testing. The STM32 CAN driver does support loopback mode.
CONFIG_NSH_BUILTIN_APPS - Build the CAN test as an NSH built-in function.
Default: Built as a standalone problem
Specific configuration options for this example include:
CONFIG_EXAMPLES_CAN_DEVPATH - The path to the CAN device. Default: /dev/can0
CONFIG_EXAMPLES_CAN_NMSGS - If CONFIG_NSH_BUILTIN_APPS
is defined, then the number of loops is provided on the command line
and this value is ignored. Otherwise, this number of CAN message is
collected and the program terminates. Default: If built as an NSH
built-in, the default is 32. Otherwise messages are sent and received
indefinitely.
The default behavior assumes loopback mode. Messages are sent, then read
and verified. The behavior can be altered for other kinds of testing where
the test only sends or received (but does not verify) can messages.
CONFIG_EXAMPLES_CAN_READONLY - Only receive messages
CONFIG_EXAMPLES_CAN_WRITEONLY - Only send messages
examples/cc3000
^^^^^^^^^^^^^^^
This is a test for the TI CC3000 wireless networking module.
examples/configdata
^^^^^^^^^^^^^^^^^^^
This is a Unit Test for the MTD configuration data driver
examples/cxxtest
^^^^^^^^^^^^^^^^
This is a test of the C++ standard library. At present a port of the uClibc++
C++ library is available. Due to licensinging issues, the uClibc++ C++ library
is not included in the NuttX source tree by default, but must be installed
(see misc/uClibc++/README.txt for installation).
The uClibc++ test includes simple test of:
- iostreams,
- STL,
- RTTI, and
- Exceptions
Example Configuration Options
-----------------------------
CONFIG_EXAMPLES_CXXTEST=y - Eanbles the example
CONFIG_EXAMPLES_CXXTEST_CXXINITIALIZE=y - By default, if CONFIG_HAVE_CXX
and CONFIG_HAVE_CXXINITIALIZE are defined, then this example
will call the NuttX function to initialize static C++ constructors.
This option may be disabled, however, if that static initialization
was performed elsewhere.
Other Required Configuration Settings
-------------------------------------
Other NuttX setting that are required include:
CONFIG_HAVE_CXX=y
CONFIG_HAVE_CXXINITIALIZE=y
CONFIG_UCLIBCXX=y
Additional uClibc++ settings may be required in your build environment.
examples/dhcpd
^^^^^^^^^^^^^^
This examples builds a tiny DCHP server for the target system.
NOTE: For test purposes, this example can be built as a
host-based DHCPD server. This can be built as follows:
cd examples/dhcpd
make -f Makefile.host TOPDIR=<nuttx-directory>
NuttX configuration settings:
CONFIG_NET=y - Of course
CONFIG_NSOCKET_DESCRIPTORS - And, of course, you must allocate some
socket descriptors.
CONFIG_NET_UDP=y - UDP support is required for DHCP
(as well as various other UDP-related
configuration settings)
CONFIG_NET_BROADCAST=y - UDP broadcast support is needed.
CONFIG_NETUTILS_UIPLIB=y - The UIP library is needed
CONFIG_EXAMPLES_DHCPD_NOMAC - (May be defined to use software assigned MAC)
CONFIG_EXAMPLES_DHCPD_IPADDR - Target IP address
CONFIG_EXAMPLES_DHCPD_DRIPADDR - Default router IP addess
CONFIG_EXAMPLES_DHCPD_NETMASK - Network mask
See also CONFIG_NETUTILS_DHCPD_* settings described elsewhere
and used in netutils/dhcpd/dhcpd.c. These settings are required
to described the behavior of the daemon.
examples/discover
^^^^^^^^^^^^^^^^^
This example exercises netutils/discover utility. This example initializes
and starts the UDP discover daemon. This daemon is useful for discovering
devices in local networks, especially with DHCP configured devices. It
listens for UDP broadcasts which also can include a device class so that
groups of devices can be discovered. It is also possible to address all
classes with a kind of broadcast discover.
This example will automatically be built as an NSH built-in if
CONFIG_NSH_BUILTIN_APPS is selected. Otherwise, it will be a standalone
program with entry point "discover_main".
NuttX configuration settings:
CONFIG_EXAMPLES_DISCOVER_DHCPC - DHCP Client
CONFIG_EXAMPLES_DISCOVER_NOMAC - Use canned MAC address
CONFIG_EXAMPLES_DISCOVER_IPADDR - Target IP address
CONFIG_EXAMPLES_DISCOVER_DRIPADDR - Router IP address
CONFIG_EXAMPLES_DISCOVER_NETMASK - Network Mask
examples/elf
^^^^^^^^^^^^
This example builds a small ELF loader test case. This includes several
test programs under examples/elf tests. These tests are build using
the relocatable ELF format and installed in a ROMFS file system. At run time,
each program in the ROMFS file system is executed. Requires CONFIG_ELF.
Other configuration options:
CONFIG_EXAMPLES_ELF_DEVMINOR - The minor device number of the ROMFS block
driver. For example, the N in /dev/ramN. Used for registering the RAM
block driver that will hold the ROMFS file system containing the ELF
executables to be tested. Default: 0
CONFIG_EXAMPLES_ELF_DEVPATH - The path to the ROMFS block driver device. This
must match EXAMPLES_ELF_DEVMINOR. Used for registering the RAM block driver
that will hold the ROMFS file system containing the ELF executables to be
tested. Default: "/dev/ram0"
NOTES:
1. CFLAGS should be provided in CELFFLAGS. RAM and FLASH memory regions
may require long allcs. For ARM, this might be:
CELFFLAGS = $(CFLAGS) -mlong-calls
Similarly for C++ flags which must be provided in CXXELFFLAGS.
2. Your top-level nuttx/Make.defs file must also include an approproate definition,
LDELFFLAGS, to generate a relocatable ELF object. With GNU LD, this should
include '-r' and '-e main' (or _main on some platforms).
LDELFFLAGS = -r -e main
If you use GCC to link, you make also need to include '-nostdlib' or
'-nostartfiles' and '-nodefaultlibs'.
3. This example also requires genromfs. genromfs can be build as part of the
nuttx toolchain. Or can built from the genromfs sources that can be found
at misc/tools/genromfs-0.5.2.tar.gz. In any event, the PATH variable must
include the path to the genromfs executable.
4. ELF size: The ELF files in this example are, be default, quite large
because they include a lot of "build garbage". You can greatly reduce the
size of the ELF binaries are using the 'objcopy --strip-unneeded' command to
remove un-necessary information from the ELF files.
5. Simulator. You cannot use this example with the the NuttX simulator on
Cygwin. That is because the Cygwin GCC does not generate ELF file but
rather some Windows-native binary format.
If you really want to do this, you can create a NuttX x86 buildroot toolchain
and use that be build the ELF executables for the ROMFS file system.
6. Linker scripts. You might also want to use a linker scripts to combine
sections better. An example linker script is at nuttx/binfmt/libelf/gnu-elf.ld.
That example might have to be tuned for your particular linker output to
position additional sections correctly. The GNU LD LDELFFLAGS then might
be:
LDELFFLAGS = -r -e main -T$(TOPDIR)/binfmt/libelf/gnu-elf.ld
examples/flash_test
^^^^^^^^^^^^^^^^^^^
This example performs a SMART flash block device test. This test performs
a sector allocate, read, write, free and garbage collection test on a SMART
MTD block device.
* CONFIG_EXAMPLES_FLASH_TEST=y - Enables the FLASH Test
Dependencies:
* CONFIG_MTD_SMART=y - SMART block driver support
* CONFIG_NSH_BUILTIN_APPS=y - This example can only be built as an NSH
command
* CONFIG_NUTTX_KERNEL=n - This test uses internal OS interfaces and so
is not available in the NUTTX kernel build
examples/ftpc
^^^^^^^^^^^^^
This is a simple FTP client shell used to exercise the capabilities
of the FTPC library (apps/netutils/ftpc). This example is configured
to that it will only work as a "built-in" program that can be run from
NSH when CONFIG_NSH_BUILTIN_APPS is defined.
From NSH, the startup command sequence is as follows. This is only
an example, your configration could have different mass storage devices,
mount paths, and FTP directories:
nsh> mount -t vfat /dev/mmcsd0 /tmp # Mount the SD card at /tmp
nsh> cd /tmp # cd into the /tmp directory
nsh> ftpc xx.xx.xx.xx[:pp] # Start the FTP client
nfc> login <name> <password> # Log into the FTP server
nfc> help # See a list of FTP commands
where xx.xx.xx.xx is the IP address of the FTP server and pp is an
optional port number.
NOTE: By default, FTPC uses readline to get data from stdin. So your
defconfig file must have the following build path:
CONFIG_SYSTEM_READLINE=y
NOTE: If you use the ftpc task over a telnet NSH connection, then you
should set the following configuration item:
CONFIG_EXAMPLES_FTPC_FGETS=y
By default, the FTPC client will use readline() to get characters from
the console. Readline includes and command-line editor and echos
characters received in stdin back through stdout. Neither of these
behaviors are desire-able if Telnet is used.
You may also want to define the following in your configuration file.
Otherwise, you will have not feeback about what is going on:
CONFIG_DEBUG=y
CONFIG_DEBUG_VERBOSE=y
CONFIG_DEBUG_FTPC=y
examples/ftpd
^^^^^^^^^^^^^^
This example exercises the FTPD daemon at apps/netuils/ftpd. Below are
configurations specific to the FTPD example (the FTPD daemon itself may
require other configuration options as well).
CONFIG_EXAMPLES_FTPD - Enable the FTPD example.
CONFIG_EXAMPLES_FTPD_PRIO - Priority of the FTP daemon.
Default: SCHED_PRIORITY_DEFAULT
CONFIG_EXAMPLES_FTPD_STACKSIZE - Stack size allocated for the
FTP daemon. Default: 2048
CONFIG_EXAMPLES_FTPD_NONETINIT - Define to suppress configuration of the
network by apps/examples/ftpd. You would need to suppress network
configuration if the network is configuration prior to running the
example.
NSH always initializes the network so if CONFIG_NSH_BUILTIN_APPS is
defined, so is CONFIG_EXAMPLES_FTPD_NONETINIT (se it does not explicitly
need to be defined in that case):
CONFIG_NSH_BUILTIN_APPS - Build the FTPD daemon example test as an
NSH built-in function. By default the FTPD daemon will be built
as a standalone application.
If CONFIG_EXAMPLES_FTPD_NONETINIT is not defined, then the following may
be specified to customized the network configuration:
CONFIG_EXAMPLES_FTPD_NOMAC - If the hardware has no MAC address of its
own, define this =y to provide a bogus address for testing.
CONFIG_EXAMPLES_FTPD_IPADDR - The target IP address. Default 10.0.0.2
CONFIG_EXAMPLES_FTPD_DRIPADDR - The default router address. Default
10.0.0.1
CONFIG_EXAMPLES_FTPD_NETMASK - The network mask. Default: 255.255.255.0
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
Other FTPD configuration options thay may be of interest:
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:
512 bytes.
CONFIG_FTPD_DATABUFFERSIZE - The size of the I/O buffer for data
transfers. Default: 2048 bytes.
CONFIG_FTPD_WORKERSTACKSIZE - The stacksize to allocate for each
FTP daemon worker thread. Default: 2048 bytes.
The following netutils libraries should be enabled in your defconfig
file:
CONFIG_NETUTILS_UIPLIB=y
CONFIG_NETUTILS_TELNED=y
examples/hello
^^^^^^^^^^^^^^
This is the mandatory, "Hello, World!!" example. It is little more
than examples/null with a single printf statement. Really useful only
for bringing up new NuttX architectures.
* CONFIG_NSH_BUILTIN_APPS
Build the "Hello, World" example as an NSH built-in application.
examples/helloxx
^^^^^^^^^^^^^^^^
This is C++ version of the "Hello, World!!" example. It is intended
only to verify that the C++ compiler is functional, that basic C++
library suupport is available, and that class are instantiated
correctly.
NuttX configuration prerequisites:
CONFIG_HAVE_CXX -- Enable C++ Support
Optional NuttX configuration settings:
CONFIG_HAVE_CXXINITIALIZE -- Enable support for static constructors
(may not be available on all platforms).
NuttX configuration settings specific to this examp;le:
CONFIG_NSH_BUILTIN_APPS -- Build the helloxx example as a
"built-in" that can be executed from the NSH command line.
CONFIG_EXAMPLES_HELLOXX_NOSTACKCONST - Set if the system does not
support construction of objects on the stack.
CONFIG_EXAMPLES_HELLOXX_CXXINITIALIZE - By default, if CONFIG_HAVE_CXX
and CONFIG_HAVE_CXXINITIALIZE are defined, then this example
will call the NuttX function to initialize static C++ constructors.
This option may be disabled, however, if that static initialization
was performed elsewhere.
Also needed:
CONFIG_HAVE_CXX=y
And you may have to tinker with the following to get libxx to compile
properly:
CONFIG_CXX_NEWLONG=y or =n
The argument of the 'new' operators should take a type of size_t. But size_t
has an unknown underlying. In the nuttx sys/types.h header file, size_t
is typed as uint32_t (which is determined by architecture-specific logic).
But the C++ compiler may believe that size_t is of a different type resulting
in compilation errors in the operator. Using the underlying integer type
Instead of size_t seems to resolve the compilation issues.
examples/hidkbd
^^^^^^^^^^^^^^^^
This is a simple test to debug/verify the USB host HID keyboard class
driver.
CONFIG_EXAMPLES_HIDKBD_DEFPRIO - Priority of "waiter" thread. Default:
50
CONFIG_EXAMPLES_HIDKBD_STACKSIZE - Stacksize of "waiter" thread. Default
1024
CONFIG_EXAMPLES_HIDKBD_DEVNAME - Name of keyboard device to be used.
Default: "/dev/kbda"
CONFIG_EXAMPLES_HIDKBD_ENCODED - Decode special key press events in the
user buffer. In this case, the example coded will use the interfaces
defined in include/nuttx/input/kbd_codec.h to decode the returned
keyboard data. These special keys include such things as up/down
arrows, home and end keys, etc. If this not defined, only 7-bit print-
able and control ASCII characters will be provided to the user.
Requires CONFIG_HIDKBD_ENCODED && CONFIG_LIB_KBDCODEC
examples/igmp
^^^^^^^^^^^^^
This is a trivial test of the NuttX IGMP capability. It present it
does not do much of value -- Much more is needed in order to verify
the IGMP features!
* CONFIG_EXAMPLES_IGMP_NOMAC
Set if the hardware has no MAC address; one will be assigned
* CONFIG_EXAMPLES_IGMP_IPADDR
Target board IP address
* CONFIG_EXAMPLES_IGMP_DRIPADDR
Default router address
* CONFIG_EXAMPLES_IGMP_NETMASK
Network mask
* CONFIG_EXAMPLES_IGMP_GRPADDR
Multicast group address
* CONFIG_EXAMPLES_UIPLIB
The UIP library is needed
examples/adc
^^^^^^^^^^^^
A mindlessly simple test of an I2C driver. It reads an write garbage data to the
I2C transmitter and/or received as fast possible.
This test depends on these specific I2S/AUDIO/NSH configurations settings (your
specific I2S settings might require additional settings).
CONFIG_I2S - Enabled I2S support
CONFIG_AUDIO - Enabled audio support
CONFIG_AUDIO_DEVICES - Enable audio device support
CONFIG_AUDIO_I2SCHAR = Enabled support for the I2S character device
CONFIG_NSH_BUILTIN_APPS - Build the I2S test as an NSH built-in function.
Default: Built as a standalone problem
Specific configuration options for this example include:
CONFIG_EXAMPLES_I2SCHAR - Enables the I2C test
CONFIG_EXAMPLES_I2SCHAR_DEVPATH - The default path to the ADC device.
Default: /dev/i2schar0
CONFIG_EXAMPLES_I2SCHAR_TX - This should be set if the I2S device supports
a transmitter.
CONFIG_EXAMPLES_I2SCHAR_TXBUFFERS - This is the default number of audio
buffers to send before the TX transfers terminate. When both TX and
RX transfers terminate, the task exits (and, if an NSH builtin, the
i2schar command returns). This number can be changed from the NSH
command line.
CONFIG_EXAMPLES_I2SCHAR_TXSTACKSIZE - This is the stack size to use when
starting the transmitter thread. Default 1536.
CONFIG_EXAMPLES_I2SCHAR_RX - This should be set if the I2S device supports
a transmitter.
CONFIG_EXAMPLES_I2SCHAR_RXBUFFERS - This is the default number of audio
buffers to receive before the RX transfers terminate. When both TX and
RX transfers terminate, the task exits (and, if an NSH builtin, the
i2schar command returns). This number can be changed from the NSH
command line.
CONFIG_EXAMPLES_I2SCHAR_RXSTACKSIZE - This is the stack size to use when
starting the receiver thread. Default 1536.
CONFIG_EXAMPLES_I2SCHAR_BUFSIZE - The size of the data payload in one
audio buffer. Applies to both TX and RX audio buffers.
CONFIG_EXAMPLES_I2SCHAR_DEVINIT - Define if architecture-specific I2S
device initialize is available. If defined, the the platform specific
code must provide a function i2schar_devinit() that will be called
each time that this test executes. Not available in the kernel build
mode.
examples/json
^^^^^^^^^^^^^
This example exercises the cJSON implementation at apps/netutils/json.
This example contains logic taken from the cJSON project:
http://sourceforge.net/projects/cjson/
The example corresponds to SVN revision r42 (with lots of changes for
NuttX coding standards). As of r42, the SVN repository was last updated
on 2011-10-10 so I presume that the code is stable and there is no risk
of maintaining duplicate logic in the NuttX repository.
examples/keypadtest
^^^^^^^^^^^^^^^^^^^
This is a generic keypad test example. It is similar to the USB hidkbd
example, but makes no assumptions about the underlying keyboard interface.
It uses the interfaces of include/nuttx/input/keypad.h.
CONFIG_EXAMPLES_KEYPADTEST - Selects the keypadtest example (only need
if the mconf/Kconfig tool is used.
CONFIG_EXAMPLES_KEYPAD_DEVNAME - The name of the keypad device that will
be opened in order to perform the keypad test. Default: "/dev/keypad"
examples/lcdrw
^^^^^^^^^^^^^^
This example may be used to verify if you can or cannot read data
correctly from an LCD interface. At present, this supports only LCDs
with RGB565 color format.
* CONFIG_EXAMPLES_LDCRW_DEVNO
LCD device number. Default: 0
* CONFIG_EXAMPLES_LDCRW_XRES
LCD X resolution. Default: 240
* CONFIG_EXAMPLES_LDCRW_YRES
LCD Y resolution. Default: 320
NOTE: This test exercises internal lcd driver interfaces. As such, it
relies on internal OS interfaces that are not normally available to a
user-space program. As a result, this example cannot be used if a
NuttX is built as a protected, supervisor kernel (CONFIG_NUTTX_KERNEL).
examples/mm
^^^^^^^^^^^
This is a simple test of the memory manager.
examples/modbus
^^^^^^^^^^^^^^^
This is a port of the FreeModbus Linux demo. It derives from the
demos/LINUX directory of the FreeModBus version 1.5.0 (June 6, 2010)
that can be downloaded in its entirety from http://developer.berlios.de/project/showfiles.php?group_id=6120.
CONFIG_EXAMPLES_MODBUS_PORT, Default 0 (for /dev/ttyS0)
CONFIG_EXAMPLES_MODBUS_BAUD, Default B38400
CONFIG_EXAMPLES_MODBUS_PARITY, Default MB_PAR_EVEN
CONFIG_EXAMPLES_MODBUS_REG_INPUT_START, Default 1000
CONFIG_EXAMPLES_MODBUS_REG_INPUT_NREGS, Default 4
CONFIG_EXAMPLES_MODBUS_REG_HOLDING_START, Default 2000
CONFIG_EXAMPLES_MODBUS_REG_HOLDING_NREGS, Default 130
The FreeModBus library resides at apps/modbus. See apps/modbus/README.txt
for additional configuration information.
examples/mount
^^^^^^^^^^^^^^
This contains a simple test of filesystem mountpoints.
* CONFIG_EXAMPLES_MOUNT_DEVNAME
The name of the user-provided block device to mount.
If CONFIG_EXAMPLES_MOUNT_DEVNAME is not provided, then
a RAM disk will be configured.
* CONFIG_EXAMPLES_MOUNT_NSECTORS
The number of "sectors" in the RAM disk used when
CONFIG_EXAMPLES_MOUNT_DEVNAME is not defined.
* CONFIG_EXAMPLES_MOUNT_SECTORSIZE
The size of each sectors in the RAM disk used when
CONFIG_EXAMPLES_MOUNT_DEVNAME is not defined.
* CONFIG_EXAMPLES_MOUNT_RAMDEVNO
The RAM device minor number used to mount the RAM disk used
when CONFIG_EXAMPLES_MOUNT_DEVNAME is not defined. The
default is zero (meaning that "/dev/ram0" will be used).
examples/mtdpart
^^^^^^^^^^^^^^^^
This examples provides a simple test of MTD partition logic.
* CONFIG_EXAMPLES_MTDPART - Enables the MTD partition test example
* CONFIG_EXAMPLES_MTDPART_ARCHINIT - The default is to use the RAM MTD
device at drivers/mtd/rammtd.c. But an architecture-specific MTD driver
can be used instead by defining CONFIG_EXAMPLES_MTDPART_ARCHINIT. In
this case, the initialization logic will call mtdpart_archinitialize()
to obtain the MTD driver instance.
* CONFIG_EXAMPLES_MTDPART_NPARTITIONS - This setting provides the number
of partitions to test. The test will divide the reported size of the
MTD device into equal-sized sub-regions for each test partition. Default:
3
When CONFIG_EXAMPLES_MTDPART_ARCHINIT is not defined, this test will use
the RAM MTD device at drivers/mtd/rammtd.c to simulate FLASH. The size of
the allocated RAM drive will be: CONFIG_EXMPLES_RAMMTD_ERASESIZE *
CONFIG_EXAMPLES_MTDPART_NEBLOCKS
* CONFIG_EXAMPLES_MTDPART_ERASESIZE - This value gives the size of one
erase block in the MTD RAM device. This must exactly match the default
configuration in drivers/mtd/rammtd.c!
* CONFIG_EXAMPLES_MTDPART_NEBLOCKS - This value gives the nubmer of erase
blocks in MTD RAM device.
examples/nettest
^^^^^^^^^^^^^^^^
This is a simple network test for verifying client- and server-
functionality in a TCP/IP connection.
CONFIG_EXAMPLES_NETTEST=y - Enables the nettest example
CONFIG_EXAMPLES_UIPLIB=y - The UIP livrary in needed.
See also examples/tcpecho
examples/nrf24l01_term
^^^^^^^^^^^^^^^^^^^^^^
These is a simple test of NRF24L01-based wireless connectivity. Enabled\
with:
CONFIG_EXAMPLES_NRF24L01TERM
Options:
CONFIG_NSH_BUILTIN_APPS - Built as an NSH built-in applications.
examples/nsh
^^^^^^^^^^^^
Basic Configuration
-------------------
This directory provides an example of how to configure and use
the NuttShell (NSH) application. NSH is a simple shell
application. NSH is described in its own README located at
apps/nshlib/README.txt. This function is enabled with:
CONFIG_EXAMPLES_NSH=y
Applications using this example will need to provide an defconfig
file in the configuration directory with instruction to build
the NSH library like:
CONFIG_NSH_LIBRARY=y
Other Configuration Requirements
--------------------------------
NOTE: If the NSH serial console is used, then following is also
required to build the readline() library:
CONFIG_SYSTEM_READLINE=y
And if networking is included:
CONFIG_NETUTILS_UIPLIB=y
CONFIG_NETUTILS_DHCPC=y
CONFIG_NETUTILS_RESOLV=y
CONFIG_NETUTILS_TFTPC=y
CONFIG_NETUTILS_WEBCLIENT=y
If the Telnet console is enabled, then the defconfig file should
also include:
CONFIG_NETUTILS_TELNETD=y
Also if the Telnet console is enabled, make sure that you have the
following set in the NuttX configuration file or else the performance
will be very bad (because there will be only one character per TCP
transfer):
CONFIG_STDIO_BUFFER_SIZE - Some value >= 64
CONFIG_STDIO_LINEBUFFER=y
C++ Support
-----------
If CONFIG_HAVE_CXX=y and CONFIG_HAVE_CXXINITIALIZE=y, then this NSH
example can be configured to initialize C++ constructors when it
is started. NSH does not use C++ and, by default, assumes that
constructors are initialized elsewhere. However, you can force
NSH to initialize constructors by setting:
CONFIG_EXAMPLES_NSH_CXXINITIALIZE=y
examples/nx
^^^^^^^^^^^
This directory contains a simple test of a subset of the NX APIs
defined in include/nuttx/nx/nx.h. The following configuration options
can be selected:
CONFIG_NSH_BUILTIN_APPS -- Build the NX example as a "built-in"
that can be executed from the NSH command line
CONFIG_EXAMPLES_NX_VPLANE -- The plane to select from the frame-
buffer driver for use in the test. Default: 0
CONFIG_EXAMPLES_NX_DEVNO - The LCD device to select from the LCD
driver for use in the test: Default: 0
CONFIG_EXAMPLES_NX_BGCOLOR -- The color of the background. Default depends on
CONFIG_EXAMPLES_NX_BPP.
CONFIG_EXAMPLES_NX_COLOR1 -- The color of window 1. Default depends on
CONFIG_EXAMPLES_NX_BPP.
CONFIG_EXAMPLES_NX_COLOR2 -- The color of window 2. Default depends on
CONFIG_EXAMPLES_NX_BPP.
CONFIG_EXAMPLES_NX_TBCOLOR -- The color of the toolbar. Default depends on
CONFIG_EXAMPLES_NX_BPP.
CONFIG_EXAMPLES_NX_FONTID - Selects the font (see font ID numbers in
include/nuttx/nx/nxfonts.h)
CONFIG_EXAMPLES_NX_FONTCOLOR -- The color of the fonts. Default depends on
CONFIG_EXAMPLES_NX_BPP.
CONFIG_EXAMPLES_NX_BPP -- Pixels per pixel to use. Valid options
include 2, 4, 8, 16, 24, and 32. Default is 32.
CONFIG_EXAMPLES_NX_RAWWINDOWS -- Use raw windows; Default is to
use pretty, framed NXTK windows with toolbars.
CONFIG_EXAMPLES_NX_EXTERNINIT - The driver for the graphics device on
this platform requires some unusual initialization. This is the
for, for example, SPI LCD/OLED devices. If this configuration is
selected, then the platform code must provide an LCD initialization
function with a prototype like:
#ifdef CONFIG_NX_LCDDRIVER
FAR struct lcd_dev_s *up_nxdrvinit(unsigned int devno);
#else
FAR struct fb_vtable_s *up_nxdrvinit(unsigned int devno);
#endif
This test can be performed with either the single-user version of
NX or with the multiple user version of NX selected with CONFIG_NX_MULTIUSER.
If CONFIG_NX_MULTIUSER is defined, then the following configuration
options also apply:
CONFIG_EXAMPLES_NX_STACKSIZE -- The stacksize to use when creating
the NX server. Default 2048
CONFIG_EXAMPLES_NX_CLIENTPRIO -- The client priority. Default: 100
CONFIG_EXAMPLES_NX_SERVERPRIO -- The server priority. Default: 120
CONFIG_EXAMPLES_NX_LISTENERPRIO -- The priority of the event listener
thread. Default 80.
CONFIG_EXAMPLES_NX_NOTIFYSIGNO -- The signal number to use with
nx_eventnotify(). Default: 4
If CONFIG_NX_MULTIUSER is defined, then the example also expects the
following settings and will generate an error if they are not as expected:
CONFIG_DISABLE_MQUEUE=n
CONFIG_DISABLE_SIGNALS=n
CONFIG_DISABLE_PTHREAD=n
CONFIG_NX_BLOCKING=y
examples/nxconsole
^^^^^^^^^^^^^^^^^^
This directory contains yet another version of the NuttShell (NSH). This
version uses the NX console device defined in include/nuttx/nx/nxconsole.h
for output. the result is that the NSH input still come from the standard
console input (probably a serial console). But the text output will go to
an NX winbdow. Prerequisite configuration settings for this test include:
CONFIG_NX=y -- NX graphics must be enabled
CONFIG_NXCONSOLE=y -- The NX console driver must be built
CONFIG_NX_MULTIUSER=y -- NX multi-user support must be enabled.
CONFIG_DISABLE_MQUEUE=n -- Message queue support must be available.
CONFIG_DISABLE_SIGNALS=n -- Signals are needed
CONFIG_DISABLE_PTHREAD=n -- pthreads are needed
CONFIG_NX_BLOCKING=y -- pthread APIs must be blocking
CONFIG_NSH_CONSOLE=y -- NSH must be configured to use a console.
The following configuration options can be selected to customize the
test:
CONFIG_EXAMPLES_NXCON_VPLANE -- The plane to select from the frame-
buffer driver for use in the test. Default: 0
CONFIG_EXAMPLES_NXCON_DEVNO - The LCD device to select from the LCD
driver for use in the test: Default: 0
CONFIG_EXAMPLES_NXCON_BGCOLOR -- The color of the background. Default
Default is a darker royal blue.
CONFIG_EXAMPLES_NXCON_WCOLOR -- The color of the window. Default is a light
slate blue.
CONFIG_EXAMPLES_NXCON_FONTID -- Selects the font (see font ID numbers in
include/nuttx/nx/nxfonts.h)
CONFIG_EXAMPLES_NXCON_FONTCOLOR -- The color of the fonts. Default is
black.
CONFIG_EXAMPLES_NXCON_BPP -- Pixels per pixel to use. Valid options
include 2, 4, 8, 16, 24, and 32. Default is 32.
CONFIG_EXAMPLES_NXCON_TOOLBAR_HEIGHT -- The height of the toolbar.
Default: 16
CONFIG_EXAMPLES_NXCON_TBCOLOR -- The color of the toolbar. Default is
a medium grey.
CONFIG_EXAMPLES_NXCON_EXTERNINIT - The driver for the graphics device on
this platform requires some unusual initialization. This is the
for, for example, SPI LCD/OLED devices. If this configuration is
selected, then the platform code must provide an LCD initialization
function with a prototype like:
#ifdef CONFIG_NX_LCDDRIVER
FAR struct lcd_dev_s *up_nxdrvinit(unsigned int devno);
#else
FAR struct fb_vtable_s *up_nxdrvinit(unsigned int devno);
#endif
CONFIG_EXAMPLES_NXCON_MINOR -- The NX console device minor number.
Default is 0 corresponding to /dev/nxcon0
CONFIG_EXAMPLES_NXCON_DEVNAME -- The quoated, full path to the
NX console device corresponding to CONFIG_EXAMPLES_NXCON_MINOR.
Default: "/dev/nxcon0"
CONFIG_EXAMPLES_NXCONSOLE_PRIO - Priority of the NxConsole task.
Default: SCHED_PRIORITY_DEFAULT
CONFIG_EXAMPLES_NXCONSOLE_STACKSIZE - Stack size allocated for the
NxConsole task. Default: 2048
The following configuration settings determine how to set up the NX
server (CONFIG_NX_MULTIUSER):
CONFIG_EXAMPLES_NXCON_STACKSIZE -- The stacksize to use when creating
the NX server. Default 2048
CONFIG_EXAMPLES_NXCON_CLIENTPRIO -- The client priority. Default: 100
CONFIG_EXAMPLES_NXCON_SERVERPRIO -- The server priority. Default: 120
CONFIG_EXAMPLES_NXCON_LISTENERPRIO -- The priority of the event listener
thread. Default 80.
CONFIG_EXAMPLES_NXCON_NOTIFYSIGNO -- The signal number to use with
nx_eventnotify(). Default: 4
examples/nxffs
^^^^^^^^^^^^^^
This is a test of the NuttX NXFFS FLASH file system. This is an NXFFS
stress test and beats on the file system very hard. It should only
be used in a simulation environment! Putting this NXFFS test on real
hardware will most likely destroy your FLASH. You have been warned.
examples/nxflat
^^^^^^^^^^^^^^^
This example builds a small NXFLAT test case. This includes several
test programs under examples/nxflat tests. These tests are build using
the NXFLAT format and installed in a ROMFS file system. At run time,
each program in the ROMFS file system is executed. Requires CONFIG_NXFLAT.
examplex/nxhello
^^^^^^^^^^^^^^^^
A very simple graphics example that just says "Hello, World!" in the
center of the display.
The following configuration options can be selected:
CONFIG_NSH_BUILTIN_APPS -- Build the NXHELLO example as a "built-in"
that can be executed from the NSH command line
CONFIG_EXAMPLES_NXHELLO_VPLANE -- The plane to select from the frame-
buffer driver for use in the test. Default: 0
CONFIG_EXAMPLES_NXHELLO_DEVNO - The LCD device to select from the LCD
driver for use in the test: Default: 0
CONFIG_EXAMPLES_NXHELLO_BGCOLOR -- The color of the background. Default
depends on CONFIG_EXAMPLES_NXHELLO_BPP.
CONFIG_EXAMPLES_NXHELLO_FONTID - Selects the font (see font ID numbers in
include/nuttx/nx/nxfonts.h)
CONFIG_EXAMPLES_NXHELLO_FONTCOLOR -- The color of the fonts used in the
background window. Default depends on CONFIG_EXAMPLES_NXHELLO_BPP.
CONFIG_EXAMPLES_NXHELLO_BPP -- Pixels per pixel to use. Valid options
include 2, 4, 8, 16, 24, and 32. Default is 32.
CONFIG_EXAMPLES_NXHELLO_EXTERNINIT - The driver for the graphics device on
this platform requires some unusual initialization. This is the
for, for example, SPI LCD/OLED devices. If this configuration is
selected, then the platform code must provide an LCD initialization
function with a prototype like:
#ifdef CONFIG_NX_LCDDRIVER
FAR struct lcd_dev_s *up_nxdrvinit(unsigned int devno);
#else
FAR struct fb_vtable_s *up_nxdrvinit(unsigned int devno);
#endif
examples/nximage
^^^^^^^^^^^^^^^^
This is a simple example that just puts the NuttX logo image in the center
of the display. This only works for RGB23 (888), RGB16 (656), RGB8 (332),
and 8-bit greyscale for now.
CONFIG_NSH_BUILTIN_APPS -- Build the NXIMAGE example as a "built-in"
that can be executed from the NSH command line
CONFIG_EXAMPLES_NXIMAGE_VPLANE -- The plane to select from the frame-
buffer driver for use in the test. Default: 0
CONFIG_EXAMPLES_NXIMAGE_DEVNO - The LCD device to select from the LCD
driver for use in the test: Default: 0
CONFIG_EXAMPLES_NXIMAGE_BPP -- Pixels per pixel to use. Valid options
include 8, 16, and 24. Default is 16.
CONFIG_EXAMPLES_NXIMAGE_XSCALEp5, CONFIG_EXAMPLES_NXIMAGE_XSCALE1p5,
CONFIG_EXAMPLES_NXIMAGE_XSCALE2p0 -- The logo image width is 160 columns.
One of these may be defined to rescale the image horizontally by .5, 1.5,
or 2.0.
CONFIG_EXAMPLES_NXIMAGE_YSCALEp5, CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5,
CONFIG_EXAMPLES_NXIMAGE_YSCALE2p0 -- The logo image height is 160 rows.
One of these may be defined to rescale the image vertically by .5, 1.5,
or 2.0.
CONFIG_EXAMPLES_NXIMAGE_GREYSCALE -- Grey scale image. Default: RGB.
CONFIG_EXAMPLES_NXIMAGE_EXTERNINIT - The driver for the graphics device on
this platform requires some unusual initialization. This is the
for, for example, SPI LCD/OLED devices. If this configuration is
selected, then the platform code must provide an LCD initialization
function with a prototype like:
#ifdef CONFIG_NX_LCDDRIVER
FAR struct lcd_dev_s *up_nxdrvinit(unsigned int devno);
#else
FAR struct fb_vtable_s *up_nxdrvinit(unsigned int devno);
#endif
How was that run-length encoded image produced?
a. I used GIMP output the image as a .c file.
b. I added som C logic to palette-ize the RGB image in the GIMP .c file
c. Then I add some simple run-length encoding to palette-ized image.
But now there is a tool that can be found in the NxWidgets package at
NxWidgets/tools/bitmap_converter.py that can be used to convert any
graphics format to the NuttX RLE format.
NOTE: As of this writing, most of the pixel depth, scaling options, and
combinations thereof have not been tested.
examplex/nxlines
^^^^^^^^^^^^^^^^
A very simple graphics example that just exercised the NX line drawing
logic.
The following configuration options can be selected:
CONFIG_EXAMPLES_NXLINES_VPLANE -- The plane to select from the frame-
buffer driver for use in the test. Default: 0
CONFIG_EXAMPLES_NXLINES_DEVNO - The LCD device to select from the LCD
driver for use in the test: Default: 0
CONFIG_EXAMPLES_NXLINES_BGCOLOR -- The color of the background. Default
depends on CONFIG_EXAMPLES_NXLINES_BPP.
CONFIG_EXAMPLES_NXLINES_LINEWIDTH - Selects the width of the lines in
pixels (default: 16)
CONFIG_EXAMPLES_NXLINES_LINECOLOR -- The color of the central lines drawn
in the background window. Default depends on CONFIG_EXAMPLES_NXLINES_BPP
(there really is no meaningful default).
CONFIG_EXAMPLES_NXLINES_BORDERWIDTH -- The width of the circular border
drawn in the background window. (default: 16).
CONFIG_EXAMPLES_NXLINES_BORDERCOLOR -- The color of the circular border
drawn in the background window. Default depends on CONFIG_EXAMPLES_NXLINES_BPP
(there really is no meaningful default).
CONFIG_EXAMPLES_NXLINES_CIRCLECOLOR -- The color of the circular region
filled in the background window. Default depends on CONFIG_EXAMPLES_NXLINES_BPP
(there really is no meaningful default).
CONFIG_EXAMPLES_NXLINES_BORDERCOLOR -- The color of the lines drawn in the
background window. Default depends on CONFIG_EXAMPLES_NXLINES_BPP (there
really is no meaningful default).
CONFIG_EXAMPLES_NXLINES_BPP -- Pixels per pixel to use. Valid options
include 2, 4, 8, 16, 24, and 32. Default is 16.
CONFIG_EXAMPLES_NXLINES_EXTERNINIT - The driver for the graphics device on
this platform requires some unusual initialization. This is the
for, for example, SPI LCD/OLED devices. If this configuration is
selected, then the platform code must provide an LCD initialization
function with a prototype like:
#ifdef CONFIG_NX_LCDDRIVER
FAR struct lcd_dev_s *up_nxdrvinit(unsigned int devno);
#else
FAR struct fb_vtable_s *up_nxdrvinit(unsigned int devno);
#endif
CONFIG_NSH_BUILTIN_APPS - Build the NX lines examples as an NSH built-in
function.
examples/nxtext
^^^^^^^^^^^^^^^
This directory contains another simple test of a subset of the NX APIs
defined in include/nuttx/nx/nx.h. This text focuses on text displays on
the dispaly background combined with pop-up displays over the text.
The text display will continue to update while the pop-up is visible.
NOTE: This example will *only* work with FB drivers and with LCD
drivers that support reading the contents of the internal LCD memory
*unless* you define CONFIG_EXAMPLES_NXTEXT_NOGETRUN. If you notice
garbage on the display or a failure at the point where the display
should scroll, it is probably because you have an LCD driver that is
write-only.
The following configuration options can be selected:
CONFIG_NSH_BUILTIN_APPS -- Build the NXTEXT example as a "built-in"
that can be executed from the NSH command line
CONFIG_EXAMPLES_NXTEXT_VPLANE -- The plane to select from the frame-
buffer driver for use in the test. Default: 0
CONFIG_EXAMPLES_NXTEXT_DEVNO - The LCD device to select from the LCD
driver for use in the test: Default: 0
CONFIG_EXAMPLES_NXTEXT_BGCOLOR -- The color of the background. Default
depends on CONFIG_EXAMPLES_NXTEXT_BPP.
CONFIG_EXAMPLES_NXTEXT_BGFONTID - Selects the font to use in the
background text (see font ID numbers in include/nuttx/nx/nxfonts.h)
CONFIG_EXAMPLES_NXTEXT_BGFONTCOLOR -- The color of the fonts used in the
background window. Default depends on CONFIG_EXAMPLES_NXTEXT_BPP.
CONFIG_EXAMPLES_NXTEXT_PUCOLOR -- The color of the pop-up window. Default
depends on CONFIG_EXAMPLES_NXTEXT_BPP.
CONFIG_EXAMPLES_NXTEXT_PUFONTID - Selects the font to use in the pop-up
windows (see font ID numbers in include/nuttx/nx/nxfonts.h)
CONFIG_EXAMPLES_NXTEXT_PUFONTCOLOR -- The color of the fonts used in the
background window. Default depends on CONFIG_EXAMPLES_NXTEXT_BPP.
CONFIG_EXAMPLES_NXTEXT_BPP -- Pixels per pixel to use. Valid options
include 2, 4, 8, 16, 24, and 32. Default is 32.
CONFIG_EXAMPLES_NXTEXT_NOGETRUN -- If your display is read-only OR if
reading is not reliable, then select this configuration to avoid
reading from the display.
CONFIG_EXAMPLES_NXTEXT_EXTERNINIT - The driver for the graphics device on
this platform requires some unusual initialization. This is the
for, for example, SPI LCD/OLED devices. If this configuration is
selected, then the platform code must provide an LCD initialization
function with a prototype like:
#ifdef CONFIG_NX_LCDDRIVER
FAR struct lcd_dev_s *up_nxdrvinit(unsigned int devno);
#else
FAR struct fb_vtable_s *up_nxdrvinit(unsigned int devno);
#endif
CONFIG_EXAMPLES_NXTEXT_BMCACHE - The maximum number of characters that
can be put in the background window. Default is 128.
CONFIG_EXAMPLES_NXTEXT_GLCACHE - The maximum nuber of pre-rendered
fonts that can be retained for the background window.
This test can be performed with either the single-user version of
NX or with the multiple user version of NX selected with CONFIG_NX_MULTIUSER.
If CONFIG_NX_MULTIUSER is defined, then the following configuration
options also apply:
CONFIG_EXAMPLES_NXTEXT_STACKSIZE -- The stacksize to use when creating
the NX server. Default 2048
CONFIG_EXAMPLES_NXTEXT_CLIENTPRIO -- The client priority. Default: 100
CONFIG_EXAMPLES_NXTEXT_SERVERPRIO -- The server priority. Default: 120
CONFIG_EXAMPLES_NXTEXT_LISTENERPRIO -- The priority of the event listener
thread. Default 80.
CONFIG_EXAMPLES_NXTEXT_NOTIFYSIGNO -- The signal number to use with
nx_eventnotify(). Default: 4
If CONFIG_NX_MULTIUSER is defined, then the example also expects the
following settings and will generate an error if they are not as expected:
CONFIG_DISABLE_MQUEUE=n
CONFIG_DISABLE_SIGNALS=n
CONFIG_DISABLE_PTHREAD=n
CONFIG_NX_BLOCKING=y
examples/null
^^^^^^^^^^^^^
This is the do nothing application. It is only used for bringing
up new NuttX architectures in the most minimal of environments.
examples/ostest
^^^^^^^^^^^^^^^
This is the NuttX 'qualification' suite. It attempts to exercise
a broad set of OS functionality. Its coverage is not very extensive
as of this writing, but it is used to qualify each NuttX release.
The behavior of the ostest can be modified with the following
settings in the configs/<board-name>/defconfig file:
* CONFIG_NSH_BUILTIN_APPS
Build the OS test example as an NSH built-in application.
* CONFIG_EXAMPLES_OSTEST_LOOPS
Used to control the number of executions of the test. If
undefined, the test executes one time. If defined to be
zero, the test runs forever.
* CONFIG_EXAMPLES_OSTEST_STACKSIZE
Used to create the ostest task. Default is 8192.
* CONFIG_EXAMPLES_OSTEST_NBARRIER_THREADS
Specifies the number of threads to create in the barrier
test. The default is 8 but a smaller number may be needed on
systems without sufficient memory to start so many threads.
* CONFIG_EXAMPLES_OSTEST_RR_RANGE
During round-robin scheduling test two threads are created. Each of the threads
searches for prime numbers in the configurable range, doing that configurable
number of times.
This value specifies the end of search range and together with number of runs
allows to configure the length of this test - it should last at least a few
tens of seconds. Allowed values [1; 32767], default 10000
* CONFIG_EXAMPLES_OSTEST_RR_RUNS
During round-robin scheduling test two threads are created. Each of the threads
searches for prime numbers in the configurable range, doing that configurable
number of times.
examples/pashello
^^^^^^^^^^^^^^^^^
This is "Hello, World" implemented via the Pascal P-Code interpreter. In
order to use this example, you must first download and install the
NuttX pascal module. After unpacking the pascal module, you can find
installation instructions in pascal/nuttx/README.txt.
The correct install location for the NuttX examples and build files is
apps/interpreters.
examples/pipe
^^^^^^^^^^^^^
A test of the mkfifo() and pipe() APIs.
* CONFIG_EXAMPLES_PIPE_STACKSIZE
Sets the size of the stack to use when creating the child tasks.
The default size is 1024.
examples/poll
^^^^^^^^^^^^^
A test of the poll() and select() APIs using FIFOs and, if available,
stdin, and a TCP/IP socket. In order to build this test, you must the
following selected in your NuttX configuration file:
CONFIG_NFILE_DESCRIPTORS - Defined to be greater than 0
CONFIG_DISABLE_POLL - NOT defined
In order to use the TCP/IP select test, you have also the following
additional things selected in your NuttX configuration file:
CONFIG_NET - Defined for general network support
CONFIG_NET_TCP - Defined for TCP/IP support
CONFIG_NSOCKET_DESCRIPTORS - Defined to be greater than 0
CONFIG_NET_TCP_READAHEAD - Defined
CONFIG_NET_NTCP_READAHEAD_BUFFERS - Defined to be greater than zero
CONFIG_EXAMPLES_POLL_NOMAC - (May be defined to use software assigned MAC)
CONFIG_EXAMPLES_POLL_IPADDR - Target IP address
CONFIG_EXAMPLES_POLL_DRIPADDR - Default router IP addess
CONFIG_EXAMPLES_POLL_NETMASK - Network mask
In order to for select to work with incoming connections, you
must also select:
CONFIG_NET_TCPBACKLOG - Incoming connections pend in a backlog until accept() is called.
In additional to the target device-side example, there is also
a host-side application in this directory. It can be compiled under
Linux or Cygwin as follows:
cd examples/usbserial
make -f Makefile.host TOPDIR=<nuttx-directory> TARGETIP=<target-ip>
Where <target-ip> is the IP address of your target board.
This will generate a small program called 'host'. Usage:
1. Build the examples/poll target program with TCP/IP poll support
and start the target.
3. Then start the host application:
./host
The host and target will exchange are variety of small messages. Each
message sent from the host should cause the select to return in target.
The target example should read the small message and send it back to
the host. The host should then receive the echo'ed message.
If networking is enabled, applications using this example will need to
provide the following definition in the defconfig file to enable the
UIP library:
CONFIG_NETUTILS_UIPLIB=y
examples/posix_spawn
^^^^^^^^^^^^^^^^^^^^
This is a simple test of the posix_spawn() API. The example derives from
examples/elf. As a result, these tests are built using the relocatable
ELF format installed in a ROMFS file system. At run time, the test program
in the ROMFS file system is spawned using posix_spawn().
Requires:
CONFIG_BINFMT_DISABLE=n - Don't disable the binary loader
CONFIG_ELF=y - Enable ELF binary loader
CONFIG_LIBC_EXECFUNCS=y - Enable support for posix_spawn
CONFIG_EXECFUNCS_SYMTAB="exports" - The name of the symbol table
created by the test.
CONFIG_EXECFUNCS_NSYMBOLS=10 - Value does not matter, it will be
corrected at runtime.
CONFIG_POSIX_SPAWN_STACKSIZE=768 - This default setting.
Test-specific configuration options:
CONFIG_EXAMPLES_POSIXSPAWN_DEVMINOR - The minor device number of the ROMFS
block. driver. For example, the N in /dev/ramN. Used for registering the
RAM block driver that will hold the ROMFS file system containing the ELF
executables to be tested. Default: 0
CONFIG_EXAMPLES_POSIXSPAWN_DEVPATH - The path to the ROMFS block driver
device. This must match EXAMPLES_POSIXSPAWN_DEVMINOR. Used for
registering the RAM block driver that will hold the ROMFS file system
containing the ELF executables to be tested. Default: "/dev/ram0"
NOTES:
1. CFLAGS should be provided in CELFFLAGS. RAM and FLASH memory regions
may require long allcs. For ARM, this might be:
CELFFLAGS = $(CFLAGS) -mlong-calls
Similarly for C++ flags which must be provided in CXXELFFLAGS.
2. Your top-level nuttx/Make.defs file must also include an approproate
definition, LDELFFLAGS, to generate a relocatable ELF object. With GNU
LD, this should include '-r' and '-e main' (or _main on some platforms).
LDELFFLAGS = -r -e main
If you use GCC to link, you make also need to include '-nostdlib' or
'-nostartfiles' and '-nodefaultlibs'.
3. This example also requires genromfs. genromfs can be build as part of the
nuttx toolchain. Or can built from the genromfs sources that can be found
at misc/tools/genromfs-0.5.2.tar.gz. In any event, the PATH variable must
include the path to the genromfs executable.
4. ELF size: The ELF files in this example are, be default, quite large
because they include a lot of "build garbage". You can greatly reduce the
size of the ELF binaries are using the 'objcopy --strip-unneeded' command to
remove un-necessary information from the ELF files.
5. Simulator. You cannot use this example with the the NuttX simulator on
Cygwin. That is because the Cygwin GCC does not generate ELF file but
rather some Windows-native binary format.
If you really want to do this, you can create a NuttX x86 buildroot toolchain
and use that be build the ELF executables for the ROMFS file system.
6. Linker scripts. You might also want to use a linker scripts to combine
sections better. An example linker script is at nuttx/binfmt/libelf/gnu-elf.ld.
That example might have to be tuned for your particular linker output to
position additional sections correctly. The GNU LD LDELFFLAGS then might
be:
LDELFFLAGS = -r -e main -T$(TOPDIR)/binfmt/libelf/gnu-elf.ld
examples/pwm
^^^^^^^^^^^^
A test of a PWM device driver. It simply enables a pulsed output for
a specified frequency and duty for a specified period of time. This
example can ONLY be built as an NSH built-in function.
This test depends on these specific PWM/NSH configurations settings (your
specific PWM settings might require additional settings).
CONFIG_PWM - Enables PWM support.
CONFIG_PWM_PULSECOUNT - Enables PWM pulse count support (if the hardware
supports it).
CONFIG_NSH_BUILTIN_APPS - Build the PWM test as an NSH built-in function.
Default: Not built! The example can only be used as an NSH built-in
application
Specific configuration options for this example include:
CONFIG_EXAMPLES_PWM_DEVPATH - The path to the default PWM device. Default: /dev/pwm0
CONFIG_EXAMPLES_PWM_FREQUENCY - The initial PWM frequency. Default: 100 Hz
CONFIG_EXAMPLES_PWM_DUTYPCT - The initial PWM duty as a percentage. Default: 50%
CONFIG_EXAMPLES_PWM_DURATION - The initial PWM pulse train duration in seconds.
Used only if the current pulse count is zero (pulse count is only supported
if CONFIG_PWM_PULSECOUNT is defined). Default: 5 seconds
CONFIG_EXAMPLES_PWM_PULSECOUNT - The initial PWM pulse count. This option is
only available if CONFIG_PWM_PULSECOUNT is non-zero. Default: 0 (i.e., use
the duration, not the count).
examples/qencoder
^^^^^^^^^^^^^^^^^
This example is a simple test of a Quadrature Encoder driver. It simply reads
positional data from the encoder and prints it.,
This test depends on these specific QE/NSH configurations settings (your
specific PWM settings might require additional settings).
CONFIG_QENCODER - Enables quadrature encoder support (upper-half driver).
CONFIG_NSH_BUILTIN_APPS - Build the QE test as an NSH built-in function.
Default: Built as a standalone progrem.
Additional configuration options will mostly likely be required for the board-
specific lower-half driver. See the README.txt file in your board configuration
directory.
Specific configuration options for this example include:
CONFIG_EXAMPLES_QENCODER_DEVPATH - The path to the QE device. Default:
/dev/qe0
CONFIG_EXAMPLES_QENCODER_NSAMPLES - If CONFIG_NSH_BUILTIN_APPS
is defined, then the number of samples is provided on the command line
and this value is ignored. Otherwise, this number of samples is
collected and the program terminates. Default: Samples are collected
indefinitely.
CONFIG_EXAMPLES_QENCODER_DELAY - This value provides the delay (in
milliseonds) between each sample. If CONFIG_NSH_BUILTIN_APPS
is defined, then this value is the default delay if no other delay is
provided on the command line. Default: 100 milliseconds
examples/random
^^^^^^^^^^^^^^^
This is a very simply test of /dev/random. It simple collects random
numbers and displays them on the console.
Prerequistes:
CONFIG_DEV_RANDOM - Support for /dev/random must be enabled in order
to select this example.
Configuration:
CONFIG_EXAMPLES_RANDOM - Enables the /dev/random test
CONFIG_EXAMPLES_MAXSAMPLES - This is the size of the /dev/random I/O
buffer in units of 32-bit samples. Careful! This buffer is allocated
on the stack as needed! Default 64.
CONFIG_EXAMPLES_NSAMPLES; - When you execute the rand command, a number
of samples ranging from 1 to EXAMPLES_MAXSAMPLES may be specified. If
no argument is specified, this is the default number of samples that\
will be collected and displayed. Default 8
examples/relays
^^^^^^^^^^^^^^^
Requires CONFIG_ARCH_RELAYS.
Contributed by Darcy Gong.
NOTE: This test exercises internal relay driver interfaces. As such, it
relies on internal OS interfaces that are not normally available to a
user-space program. As a result, this example cannot be used if a
NuttX is built as a protected, supervisor kernel (CONFIG_NUTTX_KERNEL).
examples/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
At present, the RGMP example folder contains only an empty rgmp_main.c file.
examples/romfs
^^^^^^^^^^^^^^
This example exercises the romfs filesystem. Configuration options
include:
* CONFIG_EXAMPLES_ROMFS_RAMDEVNO
The minor device number to use for the ROM disk. The default is
1 (meaning /dev/ram1)
* CONFIG_EXAMPLES_ROMFS_SECTORSIZE
The ROM disk sector size to use. Default is 64.
* CONFIG_EXAMPLES_ROMFS_MOUNTPOINT
The location to mount the ROM disk. Deafault: "/usr/local/share"
examples/sendmail
^^^^^^^^^^^^^^^^^
This examples exercises the uIP SMTP logic by sending a test message
to a selected recipient. This test can also be built to execute on
the Cygwin/Linux host environment:
cd examples/sendmail
make -f Makefile.host TOPDIR=<nuttx-directory>
Settings unique to this example include:
CONFIG_EXAMPLES_SENDMAIL_NOMAC - May be defined to use software assigned MAC (optional)
CONFIG_EXAMPLES_SENDMAIL_IPADDR - Target IP address (required)
CONFIG_EXAMPLES_SENDMAIL_DRIPADDR - Default router IP addess (required)
CONFIG_EXAMPLES_SENDMAILT_NETMASK - Network mask (required)
CONFIG_EXAMPLES_SENDMAIL_RECIPIENT - The recipient of the email (required)
CONFIG_EXAMPLES_SENDMAIL_SENDER - Optional. Default: "nuttx-testing@example.com"
CONFIG_EXAMPLES_SENDMAIL_SUBJECT - Optional. Default: "Testing SMTP from NuttX"
CONFIG_EXAMPLES_SENDMAIL_BODY - Optional. Default: "Test message sent by NuttX"
NOTE: This test has not been verified on the NuttX target environment.
As of this writing, unit-tested in the Cygwin/Linux host environment.
NOTE 2: This sendmail example only works for the simplest of
environments. Virus protection software on your host may have
to be disabled to allow you to send messages. Only very open,
unprotected recipients can be used. Most will protect themselves
from this test email because it looks like SPAM.
Applications using this example will need to enble the following
netutils libraries in their defconfig file:
CONFIG_NETUTILS_UIPLIB=y
CONFIG_NETUTILS_SMTP=y
examples/serloop
^^^^^^^^^^^^^^^^
This is a mindlessly simple loopback test on the console. Useful
for testing new serial drivers. Configuration options include:
* CONFIG_EXAMPLES_SERLOOP_BUFIO
Use C buffered I/O (getchar/putchar) vs. raw console I/O
(read/read).
examples/slcd
^^^^^^^^^^^^^
A simple test of alphanumeric, segment LCDs (SLCDs).
* CONFIG_EXAMPLES_SLCD - Enable the SLCD test
examples/smart
^^^^^^^^^^^^^^
This is a test of the SMART file systemt that derives from
examples/nxffs.
* CONFIG_EXAMPLES_SMART: - Enable the SMART file system example
* CONFIG_EXAMPLES_SMART_ARCHINIT: The default is to use the RAM MTD
device at drivers/mtd/rammtd.c. But an architecture-specific MTD
driver can be used instead by defining CONFIG_EXAMPLES_SMART_ARCHINIT. In
this case, the initialization logic will call smart_archinitialize()
to obtain the MTD driver instance.
* CONFIG_EXAMPLES_SMART_NEBLOCKS: When CONFIG_EXAMPLES_SMART_ARCHINIT is not
defined, this test will use the RAM MTD device at drivers/mtd/rammtd.c
to simulate FLASH. In this case, this value must be provided to give
the nubmer of erase blocks in MTD RAM device. The size of the allocated
RAM drive will be: CONFIG_RAMMTD_ERASESIZE * CONFIG_EXAMPLES_SMART_NEBLOCKS
* CONFIG_EXAMPLES_SMART_MAXNAME: Determines the maximum size of names used
in the filesystem
* CONFIG_EXAMPLES_SMART_MAXFILE: Determines the maximum size of a file
* CONFIG_EXAMPLES_SMART_MAXIO: Max I/O, default 347.
* CONFIG_EXAMPLES_SMART_MAXOPEN: Max open files.
* CONFIG_EXAMPLES_SMART_MOUNTPT: SMART mountpoint
* CONFIG_EXAMPLES_SMART_NLOOPS: Number of test loops. default 100
* CONFIG_EXAMPLES_SMART_VERBOSE: Verbose output
endif
examples/smart_test
^^^^^^^^^^^^^^^^^^^
Performs a file-based test on a SMART (or any) filesystem. Validates
seek, append and seek-with-write operations.
* CONFIG_EXAMPLES_SMART_TEST=y
Dependencies:
* CONFIG_NSH_BUILTIN_APPS=y: This test can be built only as an NSH
command
examples/tcpecho
^^^^^^^^^^^^^^^^
Simple single threaded, poll based TCP echo server. This example implements
the TCP Echo Server from W. Richard Stevens UNIX Network Programming Book.
Contributed by Max Holtberg.
See also examples/nettest
* CONFIG_EXAMPLES_TCPECHO =y: Enables the TCP echo server.
* CONFIG_XAMPLES_TCPECHO_PORT: Server Port, default 80
* CONFIG_EXAMPLES_TCPECHO_BACKLOG: Listen Backlog, default 8
* CONFIG_EXAMPLES_TCPECHO_NCONN: Number of Connections, default 8
* CONFIG_EXAMPLES_TCPECHO_DHCPC: DHCP Client, default n
* CONFIG_EXAMPLES_TCPECHO_NOMAC: Use Canned MAC Address, default n
* CONFIG_EXAMPLES_TCPECHO_IPADDR: Target IP address, default 0x0a000002
* CONFIG_EXAMPLES_TCPECHO_DRIPADDR: Default Router IP address (Gateway), default 0x0a000001
* CONFIG_EXAMPLES_TCPECHO_NETMASK: Network Mask, default 0xffffff00
examples/telnetd
^^^^^^^^^^^^^^^^
This directory contains a functional port of the tiny uIP shell. In
the NuttX environment, the NuttShell (at apps/nshlib) supercedes this
tiny shell and also supports telnetd.
CONFIG_EXAMPLES_TELNETD - Enable the Telnetd example
CONFIG_NETUTILS_UIPLIB, CONFIG_NETUTILS_TELNED - Enable netutils
libraries needed by the Telnetd example.
CONFIG_EXAMPLES_TELNETD_DAEMONPRIO - Priority of the Telnet daemon.
Default: SCHED_PRIORITY_DEFAULT
CONFIG_EXAMPLES_TELNETD_DAEMONSTACKSIZE - Stack size allocated for the
Telnet daemon. Default: 2048
CONFIG_EXAMPLES_TELNETD_CLIENTPRIO- Priority of the Telnet client.
Default: SCHED_PRIORITY_DEFAULT
CONFIG_EXAMPLES_TELNETD_CLIENTSTACKSIZE - Stack size allocated for the
Telnet client. Default: 2048
CONFIG_EXAMPLES_TELNETD_NOMAC - If the hardware has no MAC address of its
own, define this =y to provide a bogus address for testing.
CONFIG_EXAMPLES_TELNETD_IPADDR - The target IP address. Default 10.0.0.2
CONFIG_EXAMPLES_TELNETD_DRIPADDR - The default router address. Default
10.0.0.1
CONFIG_EXAMPLES_TELNETD_NETMASK - The network mask. Default: 255.255.255.0
Also, make sure that you have the following set in the NuttX configuration
file or else the performance will be very bad (because there will be only
one character per TCP transfer):
CONFIG_STDIO_BUFFER_SIZE - Some value >= 64
CONFIG_STDIO_LINEBUFFER=y
examples/thttpd
^^^^^^^^^^^^^^^
An example that builds netutils/thttpd with some simple NXFLAT
CGI programs. see configs/README.txt for most THTTPD settings.
In addition to those, this example accepts:
CONFIG_EXAMPLES_THTTPD_NOMAC - (May be defined to use software assigned MAC)
CONFIG_EXAMPLES_THTTPD_DRIPADDR - Default router IP addess
CONFIG_EXAMPLES_THTTPD_NETMASK - Network mask
Applications using this example will need to enable the following
netutils libraries in the defconfig file:
CONFIG_NETUTILS_UIPLIB=y
CONFIG_NETUTILS_THTTPD=y
examples/tiff
^^^^^^^^^^^^^
This is a simple unit test for the TIFF creation library at apps/graphic/tiff.
It is configured to work in the Linux user-mode simulation and has not been
tested in any other environment. Since the example also depends on some
other logic to mount a file system, currently it will only work as an NSH
built-on, i.e., if the following is defined:
CONFIG_NSH_BUILTIN_APPS=y
At a miniumum, to run in an embedded environment, you will probably have to
change the configured paths to the TIFF files defined in the example.
CONFIG_EXAMPLES_TIFF_OUTFILE - Name of the resulting TIFF file. Default is
"/tmp/result.tif"
CONFIG_EXAMPLES_TIFF_TMPFILE1/2 - Names of two temporaries files that
will be used in the file creation. Defaults are "/tmp/tmpfile1.dat" and
"/tmp/tmpfile2.dat"
The following must also be defined in your apps/ configuration file:
CONFIG_EXAMPLES_TIFF=y
CONFIG_GRAPHICS_TIFF=y
examples/touchscreen
^^^^^^^^^^^^^^^^^^^^
This configuration implements a simple touchscreen test at
apps/examples/touchscreen. This test will create an empty X11 window
and will print the touchscreen output as it is received from the
simulated touchscreen driver.
CONFIG_NSH_BUILTIN_APPS - Build the touchscreen test as
an NSH built-in function. Default: Built as a standalone problem
CONFIG_EXAMPLES_TOUCHSCREEN_MINOR - The minor device number. Minor=N
corresponds to touchscreen device /dev/inputN. Note this value must
with CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH. Default 0.
CONFIG_EXAMPLES_TOUCHSCREEN_DEVPATH - The path to the touchscreen
device. This must be consistent with CONFIG_EXAMPLES_TOUCHSCREEN_MINOR.
Default: "/dev/input0"
CONFIG_EXAMPLES_TOUCHSCREEN_NSAMPLES - If CONFIG_NSH_BUILTIN_APPS
is defined, then the number of samples is provided on the command line
and this value is ignored. Otherwise, this number of samples is
collected and the program terminates. Default: Samples are collected
indefinitely.
CONFIG_EXAMPLES_TOUCHSCREEN_MOUSE - The touchscreen test can also be
configured to work with a mouse driver by setting this option.
The following additional configurations must be set in the NuttX
configuration file:
CONFIG_INPUT=y
(Plus any touchscreen-specific settings).
The following must also be defined in your apps configuration file:
CONFIG_EXAMPLES_TOUCHSREEN=y
The board-specific logic must provide the following interfaces that will
be called by the example in order to initialize and uninitialize the
touchscreen hardware:
int arch_tcinitialize(int minor);
int arch_tcuninitialize(void);
examples/udp
^^^^^^^^^^^^
This is a simple network test for verifying client- and server-
functionality over UDP.
Applications using this example will need to enabled the following
netutils libraries in the defconfig file:
CONFIG_NETUTILS_UIPLIB=y
examples/uip
^^^^^^^^^^^^
This is a port of uIP tiny webserver example application. Settings
specific to this example include:
CONFIG_EXAMPLES_UIP_NOMAC - (May be defined to use software assigned MAC)
CONFIG_EXAMPLES_UIP_IPADDR - Target IP address
CONFIG_EXAMPLES_UIP_DRIPADDR - Default router IP addess
CONFIG_EXAMPLES_UIP_NETMASK - Network mask
CONFIG_EXAMPLES_UIP_DHCPC - Select to get IP address via DHCP
If you use DHCPC, then some special configuration network options are
required. These include:
CONFIG_NET=y - Of course
CONFIG_NSOCKET_DESCRIPTORS - And, of course, you must allocate some
socket descriptors.
CONFIG_NET_UDP=y - UDP support is required for DHCP
(as well as various other UDP-related
configuration settings).
CONFIG_NET_BROADCAST=y - UDP broadcast support is needed.
CONFIG_NET_BUFSIZE=650 - Per RFC2131 (p. 9), the DHCP client must be
(or larger) prepared to receive DHCP messages of up to
576 bytes (excluding Ethernet, IP, or UDP
headers and FCS).
Other configuration items apply also to the selected webserver net utility.
Additional relevant settings for the uIP webserver net utility are:
CONFIG_NETUTILS_HTTPDSTACKSIZE
CONFIG_NETUTILS_HTTPDFILESTATS
CONFIG_NETUTILS_HTTPDNETSTATS
Applications using this example will need to enable the following
netutils libraries in their defconfig file:
CONFIG_NETUTILS_UIPLIB=y
CONFIG_NETUTILS_DHCPC=y
CONFIG_NETUTILS_RESOLV=y
CONFIG_NETUTILS_WEBSERVER=y
NOTE: This example does depend on the perl script at
nuttx/tools/mkfsdata.pl. You must have perl installed on your
development system at /usr/bin/perl.
examples/usbserial
^^^^^^^^^^^^^^^^^^
TARGET CONFIGURATION:
This is another implementation of "Hello, World" but this one uses
a USB serial driver. Configuration options can be used to simply
the test. These options include:
CONFIG_EXAMPLES_USBSERIAL_INONLY
Only verify IN (device-to-host) data transfers. Default: both
CONFIG_EXAMPLES_USBSERIAL_OUTONLY
Only verify OUT (host-to-device) data transfers. Default: both
CONFIG_EXAMPLES_USBSERIAL_ONLYSMALL
Send only small, single packet messages. Default: Send large and small.
CONFIG_EXAMPLES_USBSERIAL_ONLYBIG
Send only large, multi-packet messages. Default: Send large and small.
If CONFIG_USBDEV_TRACE is enabled (or CONFIG_DEBUG and CONFIG_DEBUG_USB), then
the example code will also manage the USB trace output. The amount of trace output
can be controlled using:
CONFIG_EXAMPLES_USBSERIAL_TRACEINIT
Show initialization events
CONFIG_EXAMPLES_USBSERIAL_TRACECLASS
Show class driver events
CONFIG_EXAMPLES_USBSERIAL_TRACETRANSFERS
Show data transfer events
CONFIG_EXAMPLES_USBSERIAL_TRACECONTROLLER
Show controller events
CONFIG_EXAMPLES_USBSERIAL_TRACEINTERRUPTS
Show interrupt-related events.
Error results are always shown in the trace output
HOST-SIDE TEST PROGRAM
In additional to the target device-side example, there is also a
host-side application in this directory. This host side application
must be executed on a Linux host in order to perform the USBSERIAL
test. The host application can be compiled under Linux (or Cygwin?)
as follows:
cd examples/usbserial
make -f Makefile.host TOPDIR=<nuttx-directory>
RUNNING THE TEST
This will generate a small program called 'host'. Usage:
1. Build the examples/usbserial target program and start the target.
2. Wait a bit, then do enter:
dmesg
At the end of the dmesg output, you should see the serial
device was successfully idenfied and assigned to a tty device,
probably /dev/ttyUSB0 or /dev/ttyACM0 (depending on the configured
USB serial driver).
3. Then start the host application:
./host [<tty-dev>]
Where:
<tty-dev> is the USB TTY device to use. The default is
"/dev/ttyUSB0" (for the PL2303 emulation) or "/dev/ttyACM0" (for
the CDC/ACM serial device).
The host and target will exchange are variety of very small and very large
serial messages.
examples/usbterm
^^^^^^^^^^^^^^^^
This example implements a little USB terminal.. more of a USB "chat"
edited lines are received from the remote host connected via USB
serial and echoed out the target serial console. Edited lines from
the local target serial console are received and forwarded to the
remote host via USB serial.
Usage:
- Build the example and load into the target FLASH
- Connect on terminal to the target RS-232 connect and configure
for 115200 8N1. For example, suppose this Tera Term on a Windows
box.
- Power up the target board
- Connect the USB to a Linux box. Use the Linux dmesg command to
assure that the connect was successful. The USB CDC ACM device
should appear as /dev/ttyACM0
- On the Linux box, open minicom with tty=/dev/ttyACM0.
Configure minicom so that (1) local characters are echoed and (2)
so that no CR is required.
- Now what you type on the target Tera Term window should echo on
the Linux minicom window and, conversely, what you type on the
minicom winow should be echo in the target Tera Term window.
Configuration options:
CONFIG_NSH_BUILTIN_APPS - Build the usbterm example as an NSH
built-in command. NOTE: This is not fully functional as of this
writing.. It should work, but there is no mechanism in place yet
to exit the USB terminal program and return to NSH.
CONFIG_EXAMPLES_USBTERM_DEVINIT - If defined, then the example will
call a user provided function as part of its initialization:
int usbterm_devinit(void);
And another user provided function at termination:
void usbterm_devuninit(void);
CONFIG_EXAMPLES_USBTERM_BUFLEN - The size of the input and output
buffers used for receiving data. Default 256 bytes.
If CONFIG_USBDEV_TRACE is enabled (or CONFIG_DEBUG and CONFIG_DEBUG_USB, or
CONFIG_USBDEV_TRACE), then the example code will also manage the USB trace
output. The amount of trace output can be controlled using:
CONFIG_EXAMPLES_USBTERM_TRACEINIT
Show initialization events
CONFIG_EXAMPLES_USBTERM_TRACECLASS
Show class driver events
CONFIG_EXAMPLES_USBTERM_TRACETRANSFERS
Show data transfer events
CONFIG_EXAMPLES_USBTERM_TRACECONTROLLER
Show controller events
CONFIG_EXAMPLES_USBTERM_TRACEINTERRUPTS
Show interrupt-related events.
NOTE: By default, USBterm uses readline to get data from stdin. So your
defconfig file must have the following build path:
CONFIG_SYSTEM_READLINE=y
NOTE: If you use the USBterm task over a telnet NSH connection, then you
should set the following configuration item:
CONFIG_EXAMPLES_USBTERM_FGETS=y
By default, the USBterm client will use readline() to get characters from
the console. Readline includes and command-line editor and echos
characters received in stdin back through stdout. Neither of these
behaviors are desire-able if Telnet is used.
Error results are always shown in the trace output
Other relevant configuration options: CONFIG_CDCACM selected by the
Prolifics emulation (not defined) and the CDC serial implementation
(when defined). CONFIG_USBDEV_TRACE_INITIALIDSET.
examples/watchdog
^^^^^^^^^^^^^^^^^
A simple test of a watchdog timer driver. Initializes starts the watchdog
timer. It pings the watchdog timer for a period of time then lets the
watchdog timer expire... resetting the CPU is successful. This
example can ONLY be built as an NSH built-in function.
This test depends on these specific Watchdog/NSH configurations settings (your
specific watchdog hardware settings might require additional settings).
CONFIG_WATCHDOG- Enables watchdog timer support support.
CONFIG_NSH_BUILTIN_APPS - Build the watchdog time test as an NSH
built-in function. Default: Not built! The example can only be used
as an NSH built-in application
Specific configuration options for this example include:
CONFIG_EXAMPLES_WATCHDOG_DEVPATH - The path to the Watchdog device.
Default: /dev/watchdog0
CONFIG_EXAMPLES_WATCHDOG_PINGTIME - Time in milliseconds that the example
will ping the watchdog before letting the watchdog expire. Default: 5000
milliseconds
CONFIG_EXAMPLES_WATCHDOG_PINGDELAY - Time delay between pings in
milliseconds. Default: 500 milliseconds.
CONFIG_EXAMPLES_WATCHDOG_TIMEOUT - The watchdog timeout value in
milliseconds before the watchdog timer expires. Default: 2000
milliseconds.
examples/wget
^^^^^^^^^^^^^
A simple web client example. It will obtain a file from a server using the HTTP
protocol. Settings unique to this example include:
CONFIG_EXAMPLES_WGET_URL - The URL of the file to get
CONFIG_EXAMPLES_WGET_NOMAC - (May be defined to use software assigned MAC)
CONFIG_EXAMPLES_WGET_IPADDR - Target IP address
CONFIG_EXAMPLES_WGET_DRIPADDR - Default router IP addess
CONFIG_EXAMPLES_WGET_NETMASK - Network mask
This example uses netutils/webclient. Additional configuration settings apply
to that code as follows (but built-in defaults are probably OK):
CONFIG_WEBCLIENT_GETMIMETYPE, CONFIG_WEBCLIENT_MAXHTTPLINE,
CONFIG_WEBCLIENT_MAXMIMESIZE, CONFIG_WEBCLIENT_MAXHOSTNAME,
CONFIG_WEBCLIENT_MAXFILENAME
Of course, the example also requires other settings including CONFIG_NET and
CONFIG_NET_TCP. The example also uses the uIP resolver which requires CONFIG_UDP.
WARNNG: As of this writing, wget is untested on the target platform. At present
it has been tested only in the host-based configuration described in the following
note. The primary difference is that the target version will rely on the also
untested uIP name resolver.
NOTE: For test purposes, this example can be built as a host-based wget function.
This can be built as follows:
cd examples/wget
make -f Makefile.host
Applications using this example will need to enable the following netutils
libraries in the defconfig file:
CONFIG_NETUTILS_UIPLIB=y
CONFIG_NETUTILS_RESOLV=y
CONFIG_NETUTILS_WEBCLIENT=y
examples/wget
^^^^^^^^^^^^^
Uses wget to get a JSON encoded file, then decodes the file.
CONFIG_EXAMPLES_WDGETJSON_MAXSIZE - Max. JSON Buffer Size
CONFIG_EXAMPLES_EXAMPLES_WGETJSON_URL - wget URL
examples/xmlrpc
^^^^^^^^^^^^^^^
This example exercises the "Embeddable Lightweight XML-RPC Server" which
is discussed at:
http://www.drdobbs.com/web-development/an-embeddable-lightweight-xml-rpc-server/184405364
Configuration options:
CONFIG_EXAMPLES_XMLRPC_BUFFERSIZE - HTTP buffer size. Default 1024
CONFIG_EXAMPLES_XMLRPC_DHCPC - Use DHCP Client. Default n. Ignored
if CONFIG_NSH_BUILTIN_APPS is selected.
CONFIG_EXAMPLES_XMLRPC_NOMAC - Use Canned MAC Address. Defaul n. Ignored
if CONFIG_NSH_BUILTIN_APPS is selected.
CONFIG_EXAMPLES_XMLRPC_IPADDR - Target IP address. Default 0x0a000002.
Ignored if CONFIG_NSH_BUILTIN_APPS is selected.
CONFIG_EXAMPLES_XMLRPC_DRIPADDR - Default Router IP address (Gateway).
Default 0x0a000001. Ignored if CONFIG_NSH_BUILTIN_APPS is selected.
CONFIG_EXAMPLES_XMLRPC_NETMASK - Network Mask. Default 0xffffff00
Ignored if CONFIG_NSH_BUILTIN_APPS is selected.
