Misc STM32 OTF FS driver fixes + More Kconfig files

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4590 7fd9a85b-ad96-42d3-883c-3090e2eb8679

apps/Kconfig

@@ -2,3 +2,31 @@
 # For a description of the syntax of this configuration file,
 # see misc/tools/kconfig-language.txt.
 #
+
+menu "Named Applications"
+source "$APPSDIR/namedapp/Kconfig"
+endmenu
+
+menu "Examples"
+source "$APPSDIR/examples/Kconfig"
+endmenu
+
+menu "Interpreters"
+source "$APPSDIR/interpreters/Kconfig"
+endmenu
+
+menu "Network Utilities"
+source "$APPSDIR/netutils/Kconfig"
+endmenu
+
+menu "NSH Library"
+source "$APPSDIR/nshlib/Kconfig"
+endmenu
+
+menu "System NSH Add-Ons"
+source "$APPSDIR/system/Kconfig"
+endmenu
+
+menu "VSN board Add-Ons"
+source "$APPSDIR/vsn/Kconfig"
+endmenu

apps/nshlib/Kconfig

@@ -2,3 +2,396 @@
 # For a description of the syntax of this configuration file,
 # see misc/tools/kconfig-language.txt.
 #
+
+config NSH_BUILTIN_APPS
+	bool "Enable built-in applications"
+	default y
+	---help---
+		Support external registered, "named" applications that can be
+		executed from the NSH command line (see apps/README.txt for
+		more information).
+
+menu "Disable Commands"
+config NSH_DISABLE_CAT
+	bool "Disable cat"
+	default n
+config NSH_DISABLE_CD
+	bool "Disable cd"
+	default n
+config NSH_DISABLE_CP
+	bool "Disable cp"
+	default n
+config NSH_DISABLE_DD
+	bool "Disable dd"
+	default n
+config NSH_DISABLE_ECHO
+	bool "Disable echo"
+	default n
+config NSH_DISABLE_EXEC
+	bool "Disable exec"
+	default n
+config NSH_DISABLE_EXIT
+	bool "Disable exit"
+	default n
+config NSH_DISABLE_FREE
+	bool "Disable free"
+	default n
+config NSH_DISABLE_GET
+	bool "Disable get"
+	default n
+config NSH_DISABLE_HELP
+	bool "Disable help"
+	default n
+config NSH_DISABLE_IFCONFIG
+	bool "Disable ifconfig"
+	default n
+config NSH_DISABLE_KILL
+	bool "Disable kill"
+	default n
+config NSH_DISABLE_LOSETUP
+	bool "Disable losetup"
+	default n
+config NSH_DISABLE_LS
+	bool "Disable ls"
+	default n
+config NSH_DISABLE_MB
+	bool "Disable mb"
+	default n
+config NSH_DISABLE_MKDIR
+	bool "Disable mkdir"
+	default n
+config NSH_DISABLE_MKFATFS
+	bool "Disable mkfatfs"
+	default n
+config NSH_DISABLE_MKFIFO
+	bool "Disable mkfifo"
+	default n
+config NSH_DISABLE_MKRD
+	bool "Disable mkrd"
+	default n
+config NSH_DISABLE_MH
+	bool "Disable mh"
+	default n
+config NSH_DISABLE_MOUNT
+	bool "Disable mount"
+	default n
+config NSH_DISABLE_MW
+	bool "Disable mw"
+	default n
+config NSH_DISABLE_PS
+	bool "Disable ps"
+	default n
+config NSH_DISABLE_PING
+	bool "Disable ping"
+	default n
+config NSH_DISABLE_PUT
+	bool "Disable put"
+	default n
+config NSH_DISABLE_PWD
+	bool "Disable pwd"
+	default n
+config NSH_DISABLE_RM
+	bool "Disable rm"
+	default n
+config NSH_DISABLE_RMDIR
+	bool "Disable rmdir"
+	default n
+config NSH_DISABLE_SET
+	bool "Disable set"
+	default n
+config NSH_DISABLE_SH
+	bool "Disable sh"
+	default n
+config NSH_DISABLE_SLEEP
+	bool "Disable sleep"
+	default n
+config NSH_DISABLE_TEST
+	bool "Disable test"
+	default n
+config NSH_DISABLE_UMOUNT
+	bool "Disable umount"
+	default n
+config NSH_DISABLE_UNSET
+	bool "Disable unset"
+	default n
+config NSH_DISABLE_USLEEP
+	bool "Disable usleep"
+	default n
+config NSH_DISABLE_WGET
+	bool "Disable wget"
+	default n
+config NSH_DISABLE_XD
+	bool "Disable xd"
+	default n
+endmenu
+
+config NSH_FILEIOSIZE
+	bool "NSH I/O buffer size"
+	default 1024
+	---help---
+      Size of a static I/O buffer used for file access (ignored if
+		there is no filesystem). Default is 1024.
+
+config NSH_STRERROR
+	bool "Use strerror()"
+	default n
+	---help---
+		strerror(errno) makes more readable output but strerror() is
+		very large and will not be used unless this setting is 'y'
+
+config NSH_LINELEN
+	int "Max command line length"
+	default 80
+	---help---
+		The maximum length of one command line and of one output line.
+		Default: 80
+
+config NSH_NESTDEPTH
+	int "Maximum command nesting"
+	default 3
+	---help---
+		The maximum number of nested if-then[-else]-fi sequences that
+		are permissable.  Default: 3
+
+config NSH_DISABLESCRIPT
+	bool "Disable script support"
+	default n
+	---help---
+		This can be set to 'y' to suppress support for scripting.  This
+		setting disables the 'sh', 'test', and '[' commands and the
+		if-then[-else]-fi construct.  This would only be set on systems
+		where a minimal footprint is a necessity and scripting is not.
+
+config NSH_DISABLEBG
+	bool "Disable background commands"
+	default n
+	---help---
+		This can be set to 'y' to suppress support for background
+		commands.  This setting disables the 'nice' command prefix and
+		the '&' command suffix.  This would only be set on systems
+		where a minimal footprint is a necessity and background command
+		execution is not.
+
+config NSH_MMCSDMINOR
+	int "MMC/SD minor device number"
+	default 0
+	---help---
+		If the architecture supports an MMC/SD slot and if the NSH
+		architecture specific logic is present, this option will provide
+		the MMC/SD minor number, i.e., the MMC/SD block driver will
+		be registered as /dev/mmcsdN where N is the minor number.
+		Default is zero.
+
+config NSH_ROMFSETC
+	bool "Support ROMFS start-up script"
+	default n
+	---help---
+		Mount a ROMFS filesystem at /etc and provide a startup script
+		at /etc/init.d/rcS.  The default startup script will mount
+		a FAT FS RAMDISK at /tmp but the logic is easily extensible.
+
+if NSH_ROMFSETC
+config NSH_ROMFSMOUNTPT
+	string "ROMFS mount point"
+	default "/etc"
+	---help---
+		The default mountpoint for the ROMFS volume is /etc, but that
+		can be changed with this setting.  This must be a absolute path
+		beginning with '/'.
+
+config NSH_INITSCRIPT
+	string "Relative path to startup script"
+	default "init.d/rcS"
+	---help---
+		This is the relative path to the startup script within the mountpoint.
+		The default is init.d/rcS.  This is a relative path and must not
+		start with '/'.
+
+config NSH_ROMFSDEVNO
+	int "ROMFS block device minor number"
+	default 0
+	---help---
+		This is the minor number of the ROMFS block device.  The default is 
+		'0' corresponding to /dev/ram0.
+
+config NSH_ROMFSSECTSIZE
+	int "ROMFS sector size"
+	default 64
+	---help---
+		This is the sector size to use with the ROMFS volume.  Since the
+		default volume is very small, this defaults to 64 but should be
+		increased if the ROMFS volume were to be become large.  Any value
+		selected must be a power of 2.
+
+config NSH_FATDEVNO
+	int "FAT block device minor number"
+	default 0
+	---help---
+		When the default rcS file used when NSH_ROMFSETC is selected, it
+		will mount a FAT FS under /tmp. This is the minor number of the FAT
+		FS block device.  The default is '1' corresponding to /dev/ram1.
+
+config NSH_FATSECTSIZE
+	int "FAT sector size"
+	default 512
+	---help---
+		When the default rcS file used when NSH_ROMFSETC is selected, it
+		will mount a FAT FS under /tmp. This is the sector size use with the
+		FAT FS. Default is 512.
+
+config NSH_FATNSECTORS
+	int "FAT number of sectors"
+	default 1024
+	---help---
+		When the default rcS file used when NSH_ROMFSETC is selected, it
+		will mount a FAT FS under /tmp. This is the number of sectors to use
+		with the FAT FS.  Defualt is 1024.  The amount of memory used by the
+		FAT FS will be NSH_FATSECTSIZE * NSH_FATNSECTORS bytes.
+
+config NSH_FATMOUNTPT
+	string "FAT mount point"
+	default 512
+	---help---
+		When the default rcS file used when NSH_ROMFSETC is selected, it
+		will mount a FAT FS under /tmp. This is the location where the FAT
+		FS will be mounted.  Default is /tmp.
+endif
+
+config NSH_CONSOLE
+	bool "Use console"
+	default y
+	---help---
+		If NSH_CONSOLE is set to 'y', then a character driver
+		console front-end is selected (/dev/console).
+
+		Normally, the serial console device is a UART and RS-232
+		interface.  However, if CONFIG_USBDEV is defined, then a USB
+		serial device may, instead, be used if the one of
+		the following are defined:
+
+		CONFIG_PL2303 and CONFIG_PL2303_CONSOLE - Sets up the
+		Prolifics PL2303 emulation as a console device at /dev/console.
+
+		CONFIG_CDCACM and CONFIG_CDCACM_CONSOLE - Sets up the
+		CDC/ACM serial device as a console device at dev/console.
+
+config NSH_CONDEV
+	bool "Default console device"
+	default "/dev/console"
+	depends on NSH_CONSOLE
+	---help---
+		If NSH_CONSOLE is set to 'y', then NSH_CONDEV
+		may also be set to select the serial device used to support
+		the NSH console.   This should be set to the quoted name of a
+		readable/write-able character driver such as:
+		NSH_CONDEV="/dev/ttyS1". This is useful, for example,
+		to separate the NSH command line from the system console when
+		the system console is used to provide debug output.  Default:
+		stdin and stdout (probably "/dev/console")
+
+		NOTE: When any other device other than /dev/console is used
+		for a user interface, (1) linefeeds (\n) will not be expanded to
+		carriage return / linefeeds (\r\n).  You will need to set
+		your terminal program to account for this.  And (2) input is
+		not automatically echoed so you will have to turn local echo on.
+
+config NSH_ARCHINIT
+	bool "Have architecture-specific initialization"
+	default n
+	---help---
+		Set if your board provides architecture specific initialization
+		via the board-specific function nsh_archinitialize().  This
+		function will be called early in NSH initialization to allow
+		board logic to do such things as configure MMC/SD slots.
+
+config NSH_TELNET
+	bool "Use Telnet console"
+	default n
+	depends on NET && NET_TCP
+	---help---
+		If NSH_TELNET is set to 'y', then a TELENET
+		server front-end is selected.  When this option is provided,
+		you may log into NuttX remotely using telnet in order to
+		access NSH.
+
+if NSH_TELNET
+config NSH_TELNETD_PORT
+	int "Telnet port number"
+	default 23
+	---help---
+		The telnet daemon will listen on this TCP port number for connections.
+		Default: 23
+
+config NSH_TELNETD_DAEMONPRIO
+	int "Telnet daemon priority"
+	default 100
+	---help---
+		Priority of the Telnet daemon. Default: 100
+
+config NSH_TELNETD_DAEMONSTACKSIZE
+	int "Telnet daemon stack size"
+	default 2048
+	---help---
+		Stack size allocated for the Telnet daemon. Default: 2048
+
+config NSH_TELNETD_CLIENTPRIO
+	int "Telnet client priority"
+	default 100
+	---help---
+		Priority of the Telnet client. Default: 100
+
+config NSH_TELNETD_CLIENTSTACKSIZE
+	int "Telnet client stack size"
+	default 2048
+	---help---
+		Stack size allocated for the Telnet client. Default: 2048
+
+config NSH_IOBUFFER_SIZE
+	int "Telnet I/O buffer size"
+	default 512
+	---help---
+		Determines the size of the I/O buffer to use for sending/
+		receiving TELNET commands/reponses.  Default: 512
+endif
+
+config NSH_DHCPC
+	bool "Use DHCP to get IP address"
+	default n
+	depends on NET && NET_UDP && NET_BROADCAST
+	---help---
+		Obtain the IP address via DHCP.
+
+		Per RFC2131 (p. 9), the DHCP client must be prepared to receive DHCP
+		messages of up to 576 bytes (excluding Ethernet, IP, or UDP headers and FCS).
+
+if !NSH_DHCPC
+config NSH_IPADDR
+	int "Target IP address"
+	default 0x10000002
+	---help---
+		If NSH_DHCPC is NOT set, then the static IP address must be provided.
+		This is a 32-bit integer value in host order.  So, as an example,
+		0x10000002 would be 10.0.0.2.
+
+config NSH_DRIPADDR
+	int "Router IP address"
+	default 0x10000001
+	---help---
+		Default router IP address (aka, Gateway).  This is a 32-bit integer
+		value in host order.  So, as an example, 0x10000001 would be 10.0.0.1.
+
+config NSH_NETMASK
+	int "Network mask"
+	default 0xffffff00
+	---help---
+		Network mask.  This is a 32-bit integer value in host order.  So, as
+		an example, 0xffffff00 would be 255.255.255.0.
+endif
+
+config NSH_NOMAC
+	bool "Hardware has no MAC address"
+	default n
+	depends on NET
+	---help---
+		Set if your ethernet hardware has no built-in MAC address.
+		If set, a bogus MAC will be assigned.

nuttx/Kconfig

@@ -9,11 +9,109 @@ config APPSDIR
 	string
 	option env="APPSDIR"
 
-menu "General setup"
+menu "General Setup"
 config EXPERIMENTAL
 	bool "Prompt for development and/or incomplete code/drivers"
 
-comment "General build options"
+menu "Build Configuration"
+config APPS_DIR
+	string "Application directory"
+	default "../apps"
+	---help---
+		Identifies the directory that builds the
+		application to link with NuttX.  Default: ../apps This symbol must be assigned
+		to the path to the application build directory *relative* to
+		the NuttX top build direcory. If you had an application
+		directory and the NuttX directory each in separate directory
+		trees like this:
+		
+		build
+		|-nuttx
+		|  |
+		|  `- Makefile
+		`-application
+		|
+		`- Makefile
+		
+		Then you would set CONFIG_APPS_DIR=../application.
+
+		The application direction must contain Makefile and this make
+		file must support the following targets:
+		
+		libapps$(LIBEXT) (usually libapps.a). libapps.a is a static
+		library ( an archive) that contains all of application object
+		files.
+		
+		clean. Do whatever is appropriate to clean the application
+		directories for a fresh build.
+		
+		distclean. Clean everthing -- auto-generated files, symbolic
+		links etc. -- so that the directory contents are the same as
+		the contents in your configuration management system.
+		This is only done when you change the NuttX configuration.
+		
+		depend. Make or update the application build dependencies.
+		
+		When this application is invoked it will receive the setting TOPDIR like:
+		
+		$(MAKE) -C $(CONFIG_APPS_DIR) TOPDIR="$(TOPDIR)" <target>
+		
+		TOPDIR is the full path to the NuttX directory. It can be used, for
+		example, to include makefile fragments (e.g., .config or Make.defs)
+		or to set up include file paths.
+
+config BUILD_2PASS
+	bool "Two pass build"
+	default n
+	---help---
+		Enables the two pass build options.
+
+		Two-pass build options.  If the 2 pass build option is selected, then these
+		options configure the make system build a extra link object. This link object
+		is assumed to be an incremental (relative) link object, but could be a static
+		library (archive) (some modification to this Makefile would be required if
+		CONFIG_PASS1_TARGET generates an archive). Pass 1 1ncremental (relative) link
+		objects should be put into the processor-specific source directory (where other
+		link objects will be created).  If the pass1 obect is an archive, it could
+		go anywhere.
+
+if BUILD_2PASS
+config PASS1_TARGET
+	string "Pass one target"
+	default ""
+	---help---
+		The name of the first pass build target.  This
+		can be specific build target, a special build target (all, default, etc.)
+		or may just be left undefined.
+
+config PASS1_BUILDIR
+	string "Pass one build directory"
+	default "build"
+	---help---
+		The path, relative to the top NuttX build
+		directory to directory that contains the Makefile to build the
+		first pass object.  The Makefile must support the following targets:
+		The special target CONFIG_PASS1_TARGET (if defined)
+		and the usual depend, clean, and distclean targets.
+
+config PASS1_OBJECT
+	string "Pass one object"
+	default ""
+	---help---
+		May be used to include an extra, pass1 object
+		into the final link.  This would probably be the object generated
+		from the CONFIG_PASS1_TARGET.  It may be available at link time
+		in the arch/<architecture>/src directory.
+
+config NUTTX_KERNEL
+	bool "NuttX kernel build"
+	default n
+	---help---
+		Builds NuttX as a separately compiled kernel.
+endif
+endmenu
+
+menu "Binary Output Formats"
 
 config RRLOAD_BINARY
 	bool "rrload binary format"
@@ -45,8 +143,9 @@ config RAW_BINARY
 		Create the nuttx.bin in the raw binary format that is used with many
 		different loaders using the GNU objcopy program.  This option
 		should not be selected if you are not using the GNU toolchain.
+endmenu
 
-comment "General debug options"
+menu "Debug Options"
 
 config DEBUG
 	bool "Enable debug output"
@@ -136,6 +235,7 @@ config DEBUG_SYMBOLS
 		Build without optimization and with debug symbols (needed
 		for use with a debugger).
 endmenu
+endmenu
 
 menu "System Type"
 source "arch/Kconfig"

nuttx/arch/arm/src/stm32/stm32_otgfsdev.c

@@ -1020,6 +1020,16 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
           privep->epphy, privreq, privreq->req.len,
           privreq->req.xfrd, privep->zlp);
 
+  /* Check for a special case:  If we are just starting a request (xfrd==0) and
+   * the class driver is trying to send a zero-length packet (len==0).  Then set
+   * the ZLP flag so that the packet will be sent.
+   */
+
+  if (privreq->req.len == 0)
+    {
+       privep->zlp = true;
+    }
+
   /* Loop while there are still bytes to be transferred (or a zero-length-
    * packet, ZLP, to be sent).  The loop will also be terminated if there
    * is insufficient space remaining in the TxFIFO to send a complete
@@ -1043,7 +1053,7 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
            * the request.
            */
 
-          privep->zlp = 0;
+          privep->zlp = false;
           if (nbytes >= privep->ep.maxpacket)
             {
               nbytes =  privep->ep.maxpacket;
@@ -1056,7 +1066,7 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
               if (bytesleft ==  privep->ep.maxpacket &&
                  (privreq->req.flags & USBDEV_REQFLAGS_NULLPKT) != 0)
                 {
-                  privep->zlp = 1;
+                  privep->zlp = true;
                 }
             }
         }
@@ -1127,7 +1137,7 @@ static void stm32_epin_request(FAR struct stm32_usbdev_s *priv,
       usbtrace(TRACE_COMPLETE(privep->epphy), privreq->req.xfrd);
       stm32_req_complete(privep, OK);
 
-      privep->zlp    = 0;
+      privep->zlp    = false;
       privep->active = false;
     }
 }

nuttx/drivers/usbdev/usbmsc.h

@@ -312,7 +312,7 @@
 
 #define USBMSC_NINTERFACES            (1) /* Number of interfaces in the configuration */
 #define USBMSC_INTERFACEID            (CONFIG_USBMSC_IFNOBASE+0)
-#define USBMSC_ALTINTERFACEID         USBMSC_INTERFACEID
+#define USBMSC_ALTINTERFACEID         (0)
 
 #define USBMSC_CONFIGIDNONE           (0) /* Config ID means to return to address mode */
 #define USBMSC_CONFIGID               (1) /* The only supported configuration ID */

nuttx/lib/Kconfig

@@ -17,6 +17,12 @@ config STDIO_LINEBUFFER
 		Flush buffer I/O whenever a newline character is found in
 		the output data stream.
 
+config NUNGET_CHARS
+	int "Number unget() characters"
+	default 2
+	---help---
+		Number of characters that can be buffered by ungetc() (Only if NFILE_STREAMS > 0)
+
 config CONFIG_LIB_HOMEDIR
 	string "Home directory"
 	default "/"

nuttx/sched/Kconfig

@@ -2,58 +2,46 @@
 # For a description of the syntax of this configuration file,
 # see misc/tools/kconfig-language.txt.
 #
-config MM_REGIONS
+
-	int "number of memory regions"
-	default 1
-	---help---
-	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 MSEC_PER_TICK
 	int "tick timer"
 	default 10
 	---help---
-	The default system timer is 100Hz
+		The default system timer is 100Hz or MSEC_PER_TICK=10.  This setting
-	or MSEC_PER_TICK=10.  This setting may be defined to
+		may be defined to inform NuttX that the processor hardware is providing
-	inform NuttX that the processor hardware is providing
+		system timer interrupts at some interrupt interval other than 10 msec.
-	system timer interrupts at some interrupt interval other
+
-	than 10 msec.
-	
 config RR_INTERVAL
 	int "round robin timeslice"
 	default 0
 	---help---
-	The round robin timeslice will be set
+		The round robin timeslice will be set this number of milliseconds;
-	this number of milliseconds;  Round robin scheduling can
+		Round robin scheduling can be disabled by setting this value to zero.
-	be disabled by setting this value to zero.
+
-	
 config SCHED_INSTRUMENTATION
-	bool "monitor system performance"
+	bool "Monitor system performance"
 	default n
 	---help---
-	enables instrumentation in 
+		enables instrumentation in scheduler to monitor system performance.
-	scheduler to monitor system performance
+
-	
 config TASK_NAME_SIZE
-	int "task name size"
+	int "Maximum task name size"
 	default 32
 	---help---
-	Spcifies that maximum size of a
+		Spcifies that maximum size of a task name to save in the TCB.
-	task name to save in the TCB.  Useful if scheduler
+		Useful if scheduler instrumentation is selected.  Set to zero to
-	instrumentation is selected.  Set to zero to disable.
+		disable.
-	
+
 config JULIAN_TIME
 	bool "Enables Julian time conversions"
 	default n
 	---help---
-	Enables Julian time conversions
+		Enables Julian time conversions
-	
+
 config START_YEAR
 	int "start year"
 	default 2010
-	
+
 config START_MONTH
 	int "start month"
 	default 1
@@ -63,79 +51,73 @@ config START_DAY
 	default 1
 
 config DEV_CONSOLE
-	bool "enable /dev/console"
+	bool "Enable /dev/console"
 	default y
 	---help---
-	Set if architecture-specific logic
+		Set if architecture-specific logic provides /dev/console.  Enables
-	provides /dev/console.  Enables stdout, stderr, stdin.
+		stdout, stderr, stdin.
-	
+
 config DEV_LOWCONSOLE
 	bool "enable low-level serial console"
 	default n
 	---help---
-	Use the simple, low-level serial console
+		Use the simple, low-level, write-only serial console driver (minimul support)
-	driver (minimul support)
+
-	
 config MUTEX_TYPES:
-	bool "enable mutex types"
+	bool "Enable mutex types"
 	default n
 	---help---
-	Set to enable support for recursive and
+		Set to enable support for recursive and errorcheck mutexes. Enables
-	errorcheck mutexes. Enables pthread_mutexattr_settype().
+		pthread_mutexattr_settype().
-	
+
 config PRIORITY_INHERITANCE 
-	bool "enable priority inheritance "
+	bool "Enable priority inheritance "
 	default n
 	---help---
-	Set to enable support for priority
+		Set to enable support for priority inheritance on mutexes and semaphores. 
-	inheritance on mutexes and semaphores. 
+
-	
 config SEM_PREALLOCHOLDERS 
-	int "pre alloc holders"
+	int "Pre-allocated holders"
 	default 16
 	depends on PRIORITY_INHERITANCE
 	---help---
-	This setting is only used if priority
+		This setting is only used if priority inheritance is enabled.
-	inheritance is enabled.  It defines the maximum number of
+		It defines the maximum number of different threads (minus one) that
-	different threads (minus one) that can take counts on a
+		can take counts on a semaphore with priority inheritance support.
-	semaphore with priority inheritance support.  This may be 
+		This may be set to zero if priority inheritance is disabled OR if you
-	set to zero if priority inheritance is disabled OR if you
+		are only using semaphores as mutexes (only one holder) OR if no more
-	are only using semaphores as mutexes (only one holder) OR
+		than two threads participate using a counting semaphore.
-	if no more than two threads participate using a counting
-	semaphore.
 
 config SEM_NNESTPRIO
-	int "maximum number of higher priority threads"
+	int "Maximum number of higher priority threads"
 	default 16
 	depends on PRIORITY_INHERITANCE
 	---help---
-	If priority inheritance is enabled,
+		If priority inheritance is enabled, then this setting is the 
-	then this setting is the maximum number of higher priority
+		maximum number of higher priority threads (minus 1) than can be
-	threads (minus 1) than can be waiting for another thread
+		waiting for another thread to release a count on a semaphore.
-	to release a count on a semaphore.  This value may be set
+		This value may be set to zero if no more than one thread is
-	to zero if no more than one thread is expected to wait for
+		expected to wait for a semaphore.
-	a semaphore.
+
-	
 config FDCLONE_DISABLE
-	bool "disable clone all file descriptors"
+	bool "Disable cloning of file descriptors"
 	default n
 	---help---
 	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
-	bool "disable clone file descriptors without stdio"
+	bool "Disable clone file descriptors without stdio"
 	default n
 	---help---
-	Disable cloning of all but the first
+		Disable cloning of all but the first three file descriptors (stdin,
-	three file descriptors (stdin, stdout, stderr) by task_create()
+		stdout, stderr) by task_create() when a new task is started. If set,
-	when a new task is started. If set, all files/drivers will
+		all files/drivers will appear to be closed in the new task except
-	appear to be closed in the new task except for stdin, stdout,
+		for stdin, stdout, and stderr.
-	and stderr.
+
-	
 config SDCLONE_DISABLE
-	bool "disable cloning of all socket"
+	bool "Disable cloning of socket descriptors"
 	default n
 	---help---
 	Disable cloning of all socket
@@ -143,7 +125,7 @@ config SDCLONE_DISABLE
 	set, all sockets will appear to be closed in the new task.
 
 config DISABLE_OS_API
-	bool "disable os api"
+	bool "Disable NuttX interfaces"
 	default n
 	---help---
 	The following can be used to disable categories of
@@ -151,153 +133,132 @@ config DISABLE_OS_API
 	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
-	bool "disable clock"
+	bool "Disable clock interfaces"
 	depends on DISABLE_OS_API
 	default n
 
 config DISABLE_POSIX_TIMERS
-	bool "disable posix timers"
+	bool "Disable POSIX timers"
 	depends on DISABLE_OS_API
 	default n
 
 config DISABLE_PTHREAD
-	bool "disable pthread"
+	bool "Disable pthread support"
 	depends on DISABLE_OS_API
 	default n
 
 config DISABLE_SIGNALS
-	bool "disable signals"
+	bool "Disable signal support"
 	depends on DISABLE_OS_API
 	default n
 
 config DISABLE_MQUEUE
-	bool "disable mqueue"
+	bool "Disable POSIX message queue support"
 	depends on DISABLE_OS_API
 	default n
 
 config DISABLE_MOUNTPOINT
-	bool "disable mount point"
+	bool "Disable support for mount points"
 	depends on DISABLE_OS_API
 	default n
 
 config DISABLE_ENVIRON
-	bool "disable environ"
+	bool "Disable environment variable support"
 	depends on DISABLE_OS_API
 	default n
 
 config DISABLE_POLL
-	bool "disable poll"
+	bool "Disable driver poll interfaces"
 	depends on DISABLE_OS_API
 	default n
 
 comment "Sizes of configurable things (0 disables)"
 
 config MAX_TASKS
-	int "max tasks"
+	int "Max tasks"
 	default 32
 	---help---
-	The maximum number of simultaneously
+		The maximum number of simultaneously active tasks. This value must be
-	active tasks. This value must be a power of two.
+		a power of two.
-	
+
 config MAX_TASK_ARGS
-	int "max task args"
+	int "Maximum number of task arguments"
 	default 4
 	---help---
-	This controls the maximum number of
+		This controls the maximum number of of parameters that a task may
-	of parameters that a task may receive (i.e., maxmum value
+		receive (i.e., maxmum value of 'argc')
-	of 'argc')
+
-	
 config NPTHREAD_KEYS
-	int "number pthread keys"
+	int "Number of pthread keys"
 	default 4
 	---help---
-	The number of items of thread-
+		The number of items of thread-
-	specific data that can be retained
+		specific data that can be retained
-	
+
 config NFILE_DESCRIPTORS
-	int "max file descriptors"
+	int "Max file descriptors"
 	default 16
 	---help---
-	The maximum number of file
+		The maximum number of file
-	descriptors (one for each open)
+		descriptors (one for each open)
-	
+
 config NFILE_STREAMS
-	int "max file streams"
+	int "Max file streams"
 	default 16
 	---help---
-	The maximum number of streams that
+		The maximum number of streams that can be fopen'ed
-	can be fopen'ed
+
-	
 config NAME_MAX
 	int "name max"
 	default 32
 	---help---
 	The maximum size of a file name.
-	
+
-config STDIO_BUFFER_SIZE
-	int "stdio buffer size"
-	default 256
-	---help---
-	Size of the buffer to allocate
-	on fopen. (Only if config _NFILE_STREAMS > 0)
-	
-config NUNGET_CHARS
-	int "number get chars"
-	default 2
-	---help---
-	Number of characters that can be
-	buffered by ungetc() (Only if config _NFILE_STREAMS > 0)
-	
 config PREALLOC_MQ_MSGS
-	int "pre alloc mq_msgs"
+	int "Pre-allocated messages"
 	default 32
 	---help---
-	The number of pre-allocated message
+		The number of pre-allocated message structures.  The system manages
-	structures.  The system manages a pool of preallocated
+		a pool of preallocated message structures to minimize dynamic allocations
-	message structures to minimize dynamic allocations
+
-	
 config MQ_MAXMSGSIZE
-	int "mq max message size"
+	int "Maximum message size"
 	default 32
 	---help---
-	Message structures are allocated with
+		Message structures are allocated with a fixed payload size given by this
-	a fixed payload size given by this settin (does not include
+		setting (does not include other message structure overhead.
-	other message structure overhead.
+
-	
 config MAX_WDOGPARMS
 	int "max watchdog parms"
 	default 4
 	---help---
-	Maximum number of parameters that
+		Maximum number of parameters that
-	can be passed to a watchdog handler
+		can be passed to a watchdog handler
-	
+
 config PREALLOC_WDOGS
-	int "pre alloc watchdogs"
+	int "Pre-allocated watchdogs"
 	default 32
 	---help---
-	The number of pre-allocated watchdog
+		The number of pre-allocated watchdog structures.  The system manages a
-	structures.  The system manages a pool of preallocated
+		pool of preallocated watchdog structures to minimize dynamic allocations
-	watchdog structures to minimize dynamic allocations
 	
 config PREALLOC_TIMERS
-	int "pre alloc timers"
+	int "Pre-allocated timers"
 	default 8
 	---help---
-	The number of pre-allocated POSIX
+		The number of pre-allocated POSIX timer structures.  The system manages a
-	timer structures.  The system manages a pool of preallocated
+		pool of preallocated timer structures to minimize dynamic allocations.  Set to
-	timer structures to minimize dynamic allocations.  Set to
+		zero for all dynamic allocations.
-	zero for all dynamic allocations.
-
 
 comment "Stack and heap information"
 
@@ -305,56 +266,55 @@ config BOOT_RUNFROMFLASH
 	bool "boot run from flash"
 	default n
 	---help---
-	Some configurations support XIP
+		Some configurations support XIP operation from FLASH but must copy
-	operation from FLASH but must copy initialized .data sections to RAM.
+		initialized .data sections to RAM
-	(should also be =n for the LPC17xx which always runs from flash)
+
-	
 config BOOT_COPYTORAM
 	bool "boot copy to ram"
 	default n
 	---help---
-	Some configurations boot in FLASH
+		Some configurations boot in FLASH
-	but copy themselves entirely into RAM for better performance.
+		but copy themselves entirely into RAM for better performance.
-	
+
 config CUSTOM_STACK
-	bool "enable custom stack"
+	bool "Enable custom stack"
 	default n
 	---help---
-	The up_ implementation will handle
+		The up_ implementation will handle all stack operations outside of the
-	all stack operations outside of the nuttx model.
+		nuttx model.  This is necessary for certain architectures that have
-	
+		have hardware stacks (such as the 8051 family).
+
 config STACK_POINTER
 	hex ""
 	default 0
 	---help---
-	The initial stack pointer (arm7tdmi only)
+		The initial stack pointer (arm7tdmi only)
-	
+
 config IDLETHREAD_STACKSIZE
-	int "idle thread stack size"
+	int "Idle thread stack size"
 	default 1024
 	---help---
-	The size of the initial stack.
+		The size of the initial stack used by the IDLE thread.  The IDLE thread
-	This is the thread that (1) performs the inital boot of the system up
+		is the thread that (1) performs the inital boot of the system up to the
-	to the point where user_start() is spawned, and (2) there after is the
+		point where user_start() is spawned, and (2) there after is the IDLE
-	IDLE thread that executes only when there is no other thread ready to
+		thread that executes only when there is no other thread ready to run.
-	run.
+
-	
 config USERMAIN_STACKSIZE
-	int "main thread stack size"
+	int "Main thread stack size"
 	default 2048
 	---help---
-	The size of the stack to allocate
+		The size of the stack to allocate for the main user thread that begins at
-	for the main user thread that begins at the user_start() entry point.
+		the user_start() entry point.
-	
+
 config PTHREAD_STACK_MIN
-	int "minimum thrad stack size"
+	int "Minimum pthread stack size"
 	default 256
 	---help---
-	Minimum pthread stack size
+		Minimum pthread stack size
-	
+
 config PTHREAD_STACK_DEFAULT
-	int "default stack size"
+	int "Default pthread stack size"
 	default 2048
 	---help---
-	Default pthread stack size
+		Default pthread stack size
-	
+