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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3815 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2011-07-24 12:36:21 +00:00
parent 775dcf2bdb
commit e2fe2a4d7e
1 changed files with 42 additions and 9 deletions
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35
examples/README.txt
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@ -1,6 +1,8 @@
examples
^^^^^^^^
appconfig and CONFIG_APPS
The examples directory contains several sample applications that
can be linked with NuttX. The specific example is selected in the
configs/<board-name>/appconfig file via the CONFIGURED_APPS setting.
@ -12,6 +14,22 @@ examples
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).
- CONFIG_EXAMPLES_XYZ_BUILTIN -- Build the XYZ example as a "built-in"
that can be executed from the NSH command line (where XYZ is
the specific example. See the following for examples that
support this option).
examples/buttons
^^^^^^^^^^^^^^^^
@ -838,7 +856,22 @@ examples/usbstorage
Error results are always shown in the trace output
NOTE: This test exercises internal USB device driver interfaces. As such,
NOTE 1: When built as an NSH add-on command (CONFIG_EXAMPLES_USBSTRG_BUILTIN=y),
Caution should be used to assure that the SD drive (or other storage device) is
not in use when the USB storage device is configured. Specifically, the SD
driver should be unmounted like:
nsh> mount -t vfat /dev/mmcsd0 /mnt/sdcard # Card is mounted in NSH
...
nsh> umount /mnd/sdcard # Unmount before connecting USB!!!
nsh> msconn # Connect the USB storage device
...
nsh> msdis # Disconnect USB storate device
nsh> mount -t vfat /dev/mmcsd0 /mnt/sdcard # Restore the mount
Failure to do this could result in corruption of the SD card format.
NOTE 2: This test exercises internal USB device 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).