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_EXAMPLE setting.
For example,
CONFIG_EXAMPLE=ostest
Selects the examples/ostest example.
examples/hello
^^^^^^^^^^^^^^
This is the mandatory, "Hello, World!!" example. It is little more
than examples/null with a single printf statement. Again useful only
for bringing up new NuttX architectures.
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/netttest
^^^^^^^^^^^^^^^^^
This is a simple network test for verifying client- and server-
functionality in a TCP/IP connection.
examples/nsh
^^^^^^^^^^^^
This directory contains the NuttShell (NSH). This is a simple
shell application. With some additional development, NSH will
someday be a great NuttX application debugger. NSH is described
in its own README located at examples/nsh/README.txt
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_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.
examples/pashello
^^^^^^^^^^^^^^^^^
This is "Hello, World" implemented via the Pascal P-Code interpreter
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. This example also includes a nice select
based TCP/IP server example. 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_NTCP_READAHEAD_BUFFERS - Defined to be greater than zero
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=../../. 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.
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/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/udp
^^^^^^^^^^^^
This is a simple network test for verifying client- and server-
functionality over UDP.
examples/uip
^^^^^^^^^^^^
This is a port of uIP example application. It includes
conditionally compiled logic to exercise the uIP webserver,
webclient, telnet, smtp, dncpc, and resolver.
examples/usbserial
^^^^^^^^^^^^^^^^^^
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.
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=../../.
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 the seria
device was successfully idenfied and assigned to a tty device,
probably /dev/ttyUSB0.
3. Then start the host application:
./host [<tty-dev>]
Where:
<tty-dev> is the USB TTY device to use. The default is /dev/ttyUSB0.
The host and target will exchange are variety of very small and very large
serial messages.
examples/usbstorage
^^^^^^^^^^^^^^^^^^
This example registers a block device driver, then exports the block
the device using the USB storage class driver. Configuration options:
CONFIG_EXAMPLES_USBSTRG_NLUNS
Defines the number of logical units (LUNs) exported by the USB storage
driver. Each LUN corresponds to one exported block driver (or partition
of a block driver). May be 1, 2, or 3. Default is 1.
CONFIG_EXAMPLES_USBSTRG_DEVMINOR1
The minor device number of the block driver for the first LUN. For
example, N in /dev/mmcsdN. Used for registering the block driver. Default
is zero.
CONFIG_EXAMPLES_USBSTRG_DEVPATH1
The full path to the registered block driver. Default is "/dev/mmcsd0"
CONFIG_EXAMPLES_USBSTRG_DEVMINOR2 and CONFIG_EXAMPLES_USBSTRG_DEVPATH2
Similar parameters that would have to be provided if CONFIG_EXAMPLES_USBSTRG_NLUNS
is 2 or 3. No defaults.
CONFIG_EXAMPLES_USBSTRG_DEVMINOR3 and CONFIG_EXAMPLES_USBSTRG_DEVPATH3
Similar parameters that would have to be provided if CONFIG_EXAMPLES_USBSTRG_NLUNS
is 3. No defaults.
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_USBSTRG_TRACEINIT
Show initialization events
CONFIG_EXAMPLES_USBSTRG_TRACECLASS
Show class driver events
CONFIG_EXAMPLES_USBSTRG_TRACETRANSFERS
Show data transfer events
CONFIG_EXAMPLES_USBSTRG_TRACECONTROLLER
Show controller events
CONFIG_EXAMPLES_USBSTRG_TRACEINTERRUPTS
Show interrupt-related events.
Error results are always shown in the trace output
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