NX console driver is code complete but untested

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4529 42af7a65-404d-4744-a932-0658087f49c3

13 files changed, 635 insertions, 36 deletions

diff --git a/nuttx/Documentation/NXGraphicsSubsystem.html b/nuttx/Documentation/NXGraphicsSubsystem.html
index be86502ab..81ead3ed2 100644
--- a/nuttx/Documentation/NXGraphicsSubsystem.html
+++ b/nuttx/Documentation/NXGraphicsSubsystem.html
@@ -44,7 +44,8 @@
         <i>1.3.2 <a href="#nx1">NX (NXSU and NXMU)</a></i><br>
         <i>1.3.3 <a href="#nxtk1">NX Tool Kit (<code>NXTK</code>)</a></i><br>
         <i>1.3.4 <a href="#nxfonts1">NX Fonts Support (<code>NXFONTS</code>)</a></i><br>
-        <i>1.3.5 <a href="#nxwidgets1">NX Widgets (<code>NxWidgets</code>)</a></i>
+        <i>1.3.5 <a href="#nxwidgets1">NX Widgets (<code>NxWidgets</code>)</a></i><br>
+        <i>1.3.6 <a href="#nxconsole1">NX Console Driver (<code>NxConsole</code>)</a></i>
       </ul>
     </p>
   </ul>
@@ -189,7 +190,8 @@
       <i><b>B.3</b> <a href="#nxconfig">NX Configuration Settings</a></i><br>
       <i><b>B.4</b> <a href="#nxmuconfig">NX Multi-User (Only) Configuration Settings</a></i><br>
       <i><b>B.5</b> <a href="#nxtkconfig">NXTK Configuration Settings</a></i><br>
-      <i><b>B.6</b> <a href="#nxfpmtsconfig">NXFONTS Configuration Settings</a></i>
+      <i><b>B.6</b> <a href="#nxfpmtsconfig">NXFONTS Configuration Settings</a></i><br>
+      <i><b>B.7</b> <a href="#nxconsoleconfig">NxConsole Configuration Settings</a></i>
     </ul>
   </p>
   <p>
@@ -401,6 +403,13 @@
   NxWidgets is built on top of the core NuttX graphics subsystem, but is not a part of the core graphics subystems.
 </p>
 
+<h3>1.3.6 <a name="nxconsole1">NX Console Driver (<code>NxConsole</code>)</a></h3>
+
+<p>
+  NxConsole is a write-only character device (not shown) that is built on top of an NX window.
+  This character device can be used to provide <code>stdout</code> and <code>stderr</code> and, hence, can provide the output side of NuttX console.
+</p>
+
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
     <td>
@@ -3177,13 +3186,16 @@ int nxf_convert_32bpp(FAR uint32_t *dest, uint16_t height,
 
     <dt><code>graphics/nxtk</code>
       <dd>This is where the NXTOOLKIT implementation resides.
-      This toolkit is built on top of NX and works with either the single-user or
-      multi-user NX version.
+      This toolkit is built on top of NX and works with either the single-user or multi-user NX version.
       See <code>include/nuttx/nx/nxtk.h</code>.
 
     <dt><code>nuttx/../nxwidgets</code>
       <dd>The <a href="NxWidgets.html">NxWidgets</a> code is provided as a separate package located outside of the
   NuttX source tree (probably at this location).
+
+    <dt><code>graphics/nxconsole</code>
+      <dd>The NxConsole driver is built on top of NX and works with either the single-user or multi-user NX version.
+      See <code>include/nuttx/nx/nxconsole.h</code>.
   </dl>
 </ul>
 
@@ -3247,7 +3259,7 @@ int nxf_convert_32bpp(FAR uint32_t *dest, uint16_t height,
       <dd>Configures NX in multi-user mode.
     <dt><code>CONFIG_NX_BLOCKING</code>
       <dd>Open the client message queues in blocking mode.  In this case,
-    <dt><code>nx_eventhandler()</code>  will not return until a message is received and processed.
+      <code>nx_eventhandler()</code>  will not return until a message is received and processed.
     <dt><code>CONFIG_NX_MXSERVERMSGS</code> and <code>CONFIG_NX_MXCLIENTMSGS</code>
       <dd>Specifies the maximum number of messages that can fit in
       the message queues.  No additional resources are allocated, but
@@ -3337,6 +3349,37 @@ int nxf_convert_32bpp(FAR uint32_t *dest, uint16_t height,
   </dl>
 </ul>
 
+<h2>B.7 <a name="nxconsoleconfig">NxConsole Configuration Settings</a></h2>
+
+<ul>
+  <dl>
+    <dt><code>CONFIG_NXCONSOLE_BPP</code>:
+      <dd>Currently, NxConsole supports only a single pixel depth.
+      This configuration setting must be provided to support that single pixel depth.
+      Default: The smallest enabled pixel depth. (see <code>CONFIG_NX_DISABLE_*BPP</code>)
+    <dt><code>CONFIG_NXCONSOLE_NOGETRUN</code>:
+      <dd>NxConsole needs to know if it can read from the LCD or not.
+      If reading from the LCD is supported, then NxConsole can do more efficient scrolling.
+      Default: Supported
+    <dt><code>CONFIG_NXCONSOLE_MXCHARS</code>:
+      <dd>NxConsole needs to remember every character written to the console so that it can redraw the window.
+      This setting determines the size of some internal memory allocations used to hold the character data.
+      Default: 128.
+    <dt><code>CONFIG_NXCONSOLE_FONTCACHE</code>:
+      <dd>If this setting is defined, then caching of fonts will be supported by NxConsole.
+      Each font must be rendered from the tiny font storage format to the full display size and pixel depth.
+      If this setting is defined, then the more recently used font glyphs will be retained in a cache of size <code>CONFIG_NXCONSOLE_CACHESIZE</code>.
+      Default: No font caching.
+    <dt><code>CONFIG_NXCONSOLE_CACHESIZE</code>:
+      <dd>If <code>CONFIG_NXCONSOLE_FONTCACHE</code>, then this setting will control the size of the font cache (in number of glyphs).  Default: 16.
+    <dt><code>CONFIG_NXCONSOLE_LINESEPARATION</code>:
+      <dd>This the space (in rows) between each row of test.  Default: 2
+    <dt><code>CONFIG_NXCONSOLE_NOWRAP</code>:
+      <dd>By default, lines will wrap when the test reaches the right hand side of the window.
+      This setting can be defining to change this behavior so that the text is simply truncated until a new line is  encountered.
+  </dl>
+</ul>
+
 <table width ="100%">
   <tr bgcolor="#e4e4e4">
     <td>
@@ -3457,10 +3500,10 @@ genfontsources:
     </p>
     <ul><pre>
 ifeq ($(CONFIG_NXFONT_SANS23X27),y)
-NXFSET_CSRCS	+= nxfonts_bitmaps_sans23x27.c
+NXFSET_CSRCS += nxfonts_bitmaps_sans23x27.c
 endif
 ifeq ($(CONFIG_NXFONT_MYFONT),y)
-NXFSET_CSRCS	+= nxfonts_bitmaps_myfont.c
+NXFSET_CSRCS += nxfonts_bitmaps_myfont.c
 endif
 </pre></ul>
   </li>
diff --git a/nuttx/configs/sim/README.txt b/nuttx/configs/sim/README.txt
index c7005271c..71542a1b4 100644
--- a/nuttx/configs/sim/README.txt
+++ b/nuttx/configs/sim/README.txt
@@ -364,6 +364,20 @@ nx11
     CONFG_NX_MULTIUSER=y
     CONFIG_DISABLE_MQUEUE=n
 
+  examples/nxconsole
+  ------------------
+  This configuration is also set up to use the examples/nxconsole
+  test instead of examples/nx.  Simply comment out the following
+  in the appconfig file:
+
+    -CONFIGURED_APPS += examples/nx
+    +#CONFIGURED_APPS += examples/nx
+
+  And uncomment the following:
+
+    -#CONFIGURED_APPS += examples/nxconsole
+    +CONFIGURED_APPS += examples/nxconsole
+
 ostest
 
   Description
diff --git a/nuttx/configs/sim/nx/appconfig b/nuttx/configs/sim/nx/appconfig
index 12a1f4ac9..de984c1f6 100644
--- a/nuttx/configs/sim/nx/appconfig
+++ b/nuttx/configs/sim/nx/appconfig
@@ -1,8 +1,8 @@
 ############################################################################
 # configs/sim/nx/appconfig
 #
-#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
-#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#   Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -34,6 +34,9 @@
 ############################################################################
 
 # Path to example in apps/examples containing the user_start entry point
+# Various NX tests can be supported, simply comment-out examples/nx and
+# uncomment the test you wish to perform
 
 CONFIGURED_APPS += examples/nx
+#CONFIGURED_APPS += examples/nxconsole
 
diff --git a/nuttx/configs/sim/nx/defconfig b/nuttx/configs/sim/nx/defconfig
index d5977f3f5..b301f869b 100644
--- a/nuttx/configs/sim/nx/defconfig
+++ b/nuttx/configs/sim/nx/defconfig
@@ -1,8 +1,8 @@
 ############################################################################
 # sim/nx/defconfig
 #
-#   Copyright (C) 2008-2010 Gregory Nutt. All rights reserved.
-#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#   Copyright (C) 2008-2010, 2012 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -51,6 +51,7 @@ CONFIG_ARCH_BOARD_SIM=y
 
 #
 # Simulated framebuffer configuration
+#
 CONFIG_SIM_X11FB=n
 CONFIG_SIM_FBWIDTH=480
 CONFIG_SIM_FBHEIGHT=240
@@ -269,6 +270,7 @@ CONFIG_PREALLOC_TIMERS=8
 
 #
 # Framebuffer driver options
+#
 CONFIG_FB_CMAP=n
 CONFIG_FB_HWCURSOR=n
 CONFIG_FB_HWCURSORIMAGE=n
@@ -277,14 +279,17 @@ CONFIG_FB_HWCURSORIMAGE=n
 
 #
 # FAT filesystem configuration
+#
 # CONFIG_FS_FAT - Enable FAT filesystem support
 # CONFIG_FAT_SECTORSIZE - Max supported sector size
 # CONFIG_FS_ROMFS - Enable ROMFS filesystem support
+#
 CONFIG_FS_FAT=n
 CONFIG_FS_ROMFS=n
 
 #
 # TCP/IP and UDP support via uIP
+#
 # CONFIG_NET - Enable or disable all network features
 # CONFIG_NET_IPv6 - Build in support for IPv6
 # CONFIG_NSOCKET_DESCRIPTORS - Maximum number of socket descriptors per task/thread.
@@ -331,8 +336,10 @@ CONFIG_NET_BROADCAST=n
 
 #
 # UIP Network Utilities
+#
 # CONFIG_NET_DHCP_LIGHT - Reduces size of DHCP
 # CONFIG_NET_RESOLV_ENTRIES - Number of resolver entries
+#
 CONFIG_NET_DHCP_LIGHT=n
 CONFIG_NET_RESOLV_ENTRIES=4
 
@@ -415,7 +422,47 @@ CONFIG_NX_MXSERVERMSGS=32
 CONFIG_NX_MXCLIENTMSGS=16
 
 #
+# NxConsole Configuration Settings:
+#
+# CONFIG_NXCONSOLE_BPP
+#   Currently, NxConsole supports only a single pixel depth. This
+#   configuration setting must be provided to support that single pixel depth.
+#   Default: The smallest enabled pixel depth. (see CONFIG_NX_DISABLE_*BPP)
+# CONFIG_NXCONSOLE_NOGETRUN
+#   NxConsole needs to know if it can read from the LCD or not. If reading
+#   from the LCD is supported, then NxConsole can do more efficient
+#   scrolling. Default: Supported
+# CONFIG_NXCONSOLE_MXCHARS
+#   NxConsole needs to remember every character written to the console so
+#   that it can redraw the window. This setting determines the size of some
+#   internal memory allocations used to hold the character data. Default: 128.
+# CONFIG_NXCONSOLE_FONTCACHE
+#   If this setting is defined, then caching of fonts will be supported by
+#   NxConsole. Each font must be rendered from the tiny font storage format
+#   to the full display size and pixel depth. If this setting is defined, then
+#   the more recently used font glyphs will be retained in a cache of size
+#   CONFIG_NXCONSOLE_CACHESIZE. Default: No font caching.
+# CONFIG_NXCONSOLE_CACHESIZE
+#   If CONFIG_NXCONSOLE_FONTCACHE, then this setting will control the size
+#   of the font cache (in number of glyphs).  Default: 16.
+# CONFIG_NXCONSOLE_LINESEPARATION
+#   This the space (in rows) between each row of test.  Default: 2
+# CONFIG_NXCONSOLE_NOWRAP
+#   By default, lines will wrap when the test reaches the right hand side
+#   of the window. This setting can be defining to change this behavior so
+#   that the text is simply truncated until a new line is  encountered.
+#
+CONFIG_NXCONSOLE_BPP=8
+# CONFIG_NXCONSOLE_NOGETRUN
+# CONFIG_NXCONSOLE_MXCHARS
+# CONFIG_NXCONSOLE_FONTCACHE
+# CONFIG_NXCONSOLE_CACHESIZE
+# CONFIG_NXCONSOLE_LINESEPARATION
+# CONFIG_NXCONSOLE_NOWRAP
+
+#
 # Settings for examples/uip
+#
 CONFIG_EXAMPLE_UIP_IPADDR=(192<<24|168<<16|0<<8|128)
 CONFIG_EXAMPLE_UIP_DRIPADDR=(192<<24|168<<16|0<<8|1)
 CONFIG_EXAMPLE_UIP_NETMASK=(255<<24|255<<16|255<<8|0)
@@ -423,6 +470,7 @@ CONFIG_EXAMPLE_UIP_DHCPC=n
 
 #
 # Settings for examples/nettest
+#
 CONFIG_EXAMPLE_NETTEST_SERVER=n
 CONFIG_EXAMPLE_NETTEST_PERFORMANCE=n
 CONFIG_EXAMPLE_NETTEST_NOMAC=n
@@ -433,6 +481,7 @@ CONFIG_EXAMPLE_NETTEST_CLIENTIP=(192<<24|168<<16|0<<8|106)
 
 #
 # Settings for examples/ostest
+#
 CONFIG_EXAMPLES_OSTEST_LOOPS=100
 CONFIG_EXAMPLES_OSTEST_STACKSIZE=8192
 
@@ -466,6 +515,7 @@ CONFIG_EXAMPLES_OSTEST_STACKSIZE=8192
 # CONFIG_NSH_FATSECTSIZE - FAT FS sector size
 # CONFIG_NSH_FATNSECTORS - FAT FS number of sectors
 # CONFIG_NSH_FATMOUNTPT - FAT FS mountpoint
+#
 CONFIG_NSH_FILEIOSIZE=1024
 CONFIG_NSH_STRERROR=n
 CONFIG_NSH_LINELEN=80
diff --git a/nuttx/configs/sim/nx11/appconfig b/nuttx/configs/sim/nx11/appconfig
index d99648abc..ce54b34e4 100644
--- a/nuttx/configs/sim/nx11/appconfig
+++ b/nuttx/configs/sim/nx11/appconfig
@@ -1,8 +1,8 @@
 ############################################################################
 # configs/sim/nx11/appconfig
 #
-#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
-#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#   Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -34,6 +34,8 @@
 ############################################################################
 
 # Path to example in apps/examples containing the user_start entry point
+# Various NX tests can be supported, simply comment-out examples/nx and
+# uncomment the test you wish to perform
 
 CONFIGURED_APPS += examples/nx
-
+#CONFIGURED_APPS += examples/nxconsole
diff --git a/nuttx/configs/sim/nx11/defconfig b/nuttx/configs/sim/nx11/defconfig
index 26c26c60d..890e08592 100644
--- a/nuttx/configs/sim/nx11/defconfig
+++ b/nuttx/configs/sim/nx11/defconfig
@@ -1,8 +1,8 @@
 ############################################################################
 # sim/nx11/defconfig
 #
-#   Copyright (C) 2008, 2010-2011 Gregory Nutt. All rights reserved.
-#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#   Copyright (C) 2008, 2010-2012 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -271,6 +271,7 @@ CONFIG_PREALLOC_TIMERS=8
 
 #
 # Framebuffer driver options
+#
 CONFIG_FB_CMAP=y
 CONFIG_FB_HWCURSOR=n
 CONFIG_FB_HWCURSORIMAGE=n
@@ -279,14 +280,17 @@ CONFIG_FB_HWCURSORIMAGE=n
 
 #
 # FAT filesystem configuration
+#
 # CONFIG_FS_FAT - Enable FAT filesystem support
 # CONFIG_FAT_SECTORSIZE - Max supported sector size
 # CONFIG_FS_ROMFS - Enable ROMFS filesystem support
+#
 CONFIG_FS_FAT=n
 CONFIG_FS_ROMFS=n
 
 #
 # TCP/IP and UDP support via uIP
+#
 # CONFIG_NET - Enable or disable all network features
 # CONFIG_NET_IPv6 - Build in support for IPv6
 # CONFIG_NSOCKET_DESCRIPTORS - Maximum number of socket descriptors per task/thread.
@@ -333,8 +337,10 @@ CONFIG_NET_BROADCAST=n
 
 #
 # UIP Network Utilities
+#
 # CONFIG_NET_DHCP_LIGHT - Reduces size of DHCP
 # CONFIG_NET_RESOLV_ENTRIES - Number of resolver entries
+#
 CONFIG_NET_DHCP_LIGHT=n
 CONFIG_NET_RESOLV_ENTRIES=4
 
@@ -417,7 +423,47 @@ CONFIG_NX_MXSERVERMSGS=32
 CONFIG_NX_MXCLIENTMSGS=16
 
 #
+# NxConsole Configuration Settings:
+#
+# CONFIG_NXCONSOLE_BPP
+#   Currently, NxConsole supports only a single pixel depth. This
+#   configuration setting must be provided to support that single pixel depth.
+#   Default: The smallest enabled pixel depth. (see CONFIG_NX_DISABLE_*BPP)
+# CONFIG_NXCONSOLE_NOGETRUN
+#   NxConsole needs to know if it can read from the LCD or not. If reading
+#   from the LCD is supported, then NxConsole can do more efficient
+#   scrolling. Default: Supported
+# CONFIG_NXCONSOLE_MXCHARS
+#   NxConsole needs to remember every character written to the console so
+#   that it can redraw the window. This setting determines the size of some
+#   internal memory allocations used to hold the character data. Default: 128.
+# CONFIG_NXCONSOLE_FONTCACHE
+#   If this setting is defined, then caching of fonts will be supported by
+#   NxConsole. Each font must be rendered from the tiny font storage format
+#   to the full display size and pixel depth. If this setting is defined, then
+#   the more recently used font glyphs will be retained in a cache of size
+#   CONFIG_NXCONSOLE_CACHESIZE. Default: No font caching.
+# CONFIG_NXCONSOLE_CACHESIZE
+#   If CONFIG_NXCONSOLE_FONTCACHE, then this setting will control the size
+#   of the font cache (in number of glyphs).  Default: 16.
+# CONFIG_NXCONSOLE_LINESEPARATION
+#   This the space (in rows) between each row of test.  Default: 2
+# CONFIG_NXCONSOLE_NOWRAP
+#   By default, lines will wrap when the test reaches the right hand side
+#   of the window. This setting can be defining to change this behavior so
+#   that the text is simply truncated until a new line is  encountered.
+#
+CONFIG_NXCONSOLE_BPP=32
+# CONFIG_NXCONSOLE_NOGETRUN
+# CONFIG_NXCONSOLE_MXCHARS
+# CONFIG_NXCONSOLE_FONTCACHE
+# CONFIG_NXCONSOLE_CACHESIZE
+# CONFIG_NXCONSOLE_LINESEPARATION
+# CONFIG_NXCONSOLE_NOWRAP
+
+#
 # Settings for examples/uip
+#
 CONFIG_EXAMPLE_UIP_IPADDR=(192<<24|168<<16|0<<8|128)
 CONFIG_EXAMPLE_UIP_DRIPADDR=(192<<24|168<<16|0<<8|1)
 CONFIG_EXAMPLE_UIP_NETMASK=(255<<24|255<<16|255<<8|0)
@@ -425,6 +471,7 @@ CONFIG_EXAMPLE_UIP_DHCPC=n
 
 #
 # Settings for examples/nettest
+#
 CONFIG_EXAMPLE_NETTEST_SERVER=n
 CONFIG_EXAMPLE_NETTEST_PERFORMANCE=n
 CONFIG_EXAMPLE_NETTEST_NOMAC=n
@@ -435,6 +482,7 @@ CONFIG_EXAMPLE_NETTEST_CLIENTIP=(192<<24|168<<16|0<<8|106)
 
 #
 # Settings for examples/ostest
+#
 CONFIG_EXAMPLES_OSTEST_LOOPS=100
 CONFIG_EXAMPLES_OSTEST_STACKSIZE=8192
 
@@ -468,6 +516,7 @@ CONFIG_EXAMPLES_OSTEST_STACKSIZE=8192
 # CONFIG_NSH_FATSECTSIZE - FAT FS sector size
 # CONFIG_NSH_FATNSECTORS - FAT FS number of sectors
 # CONFIG_NSH_FATMOUNTPT - FAT FS mountpoint
+#
 CONFIG_NSH_FILEIOSIZE=1024
 CONFIG_NSH_STRERROR=n
 CONFIG_NSH_LINELEN=80
@@ -517,6 +566,7 @@ CONFIG_NSH_FATMOUNTPT=/tmp
 # CONFIG_EXAMPLES_NX_SERVERPRIO -- The server priority.  Default: 120
 # CONFIG_EXAMPLES_NX_NOTIFYSIGNO -- The signal number to use with
 #   nx_eventnotify().  Default: 4
+#
 CONFIG_EXAMPLES_NX_VPLANE=0
 #CONFIG_EXAMPLES_NX_BGCOLOR
 #CONFIG_EXAMPLES_NX_COLOR1
@@ -532,6 +582,7 @@ CONFIG_EXAMPLES_NX_NOTIFYSIGNO=4
 
 #
 # Settings for examples/mount
+#
 CONFIG_EXAMPLES_MOUNT_DEVNAME="/dev/ram0"
 #CONFIG_EXAMPLES_MOUNT_NSECTORS=2048
 #CONFIG_EXAMPLES_MOUNT_SECTORSIZE=512
@@ -563,7 +614,7 @@ CONFIG_BOOT_RUNFROMFLASH=n
 CONFIG_BOOT_COPYTORAM=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=4096
-CONFIG_USERMAIN_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=16384
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=8192
 CONFIG_HEAP_BASE=
diff --git a/nuttx/graphics/README.txt b/nuttx/graphics/README.txt
index 356386f84..d5027c1f0 100644
--- a/nuttx/graphics/README.txt
+++ b/nuttx/graphics/README.txt
@@ -34,6 +34,9 @@ at the present, but here is the longer term roadmap:
               and without NXTOOLKIT for raw access to window memory.
   NXGLIB    - Low level graphics utilities and direct framebuffer rendering logic.
               NX is built on top of NXGLIB.
+  NxConsole - NxConsole is a write-only character device that is built on top of
+              an NX window.  This character device can be used to provide stdout
+              and stderr and, hence, can provide the output side of NuttX console.
 
 Related Header Files
 ^^^^^^^^^^^^^^^^^^^^
@@ -150,10 +153,10 @@ Installing New Fonts
 
        genfontsources:
          ifeq ($(CONFIG_NXFONT_SANS23X27),y)
-	      @$(MAKE) -C nxfonts -f Makefile.sources TOPDIR=$(TOPDIR) NXFONTS_FONTID=1 EXTRADEFINES=$(EXTRADEFINES)
+          @$(MAKE) -C nxfonts -f Makefile.sources TOPDIR=$(TOPDIR) NXFONTS_FONTID=1 EXTRADEFINES=$(EXTRADEFINES)
         endif
          ifeq ($(CONFIG_NXFONT_MYFONT),y)
-	      @$(MAKE) -C nxfonts -f Makefile.sources TOPDIR=$(TOPDIR) NXFONTS_FONTID=2 EXTRADEFINES=$(EXTRADEFINES)
+          @$(MAKE) -C nxfonts -f Makefile.sources TOPDIR=$(TOPDIR) NXFONTS_FONTID=2 EXTRADEFINES=$(EXTRADEFINES)
         endif
 
     6. nuttx/graphics/nxfonts/Make.defs.  Set the make variable NXFSET_CSRCS.
@@ -161,10 +164,10 @@ Installing New Fonts
        NXFONTS_FONTID=2:
 
        ifeq ($(CONFIG_NXFONT_SANS23X27),y)
-       NXFSET_CSRCS	+= nxfonts_bitmaps_sans23x27.c
+       NXFSET_CSRCS += nxfonts_bitmaps_sans23x27.c
        endif
        ifeq ($(CONFIG_NXFONT_MYFONT),y)
-       NXFSET_CSRCS	+= nxfonts_bitmaps_myfont.c
+       NXFSET_CSRCS += nxfonts_bitmaps_myfont.c
        endif
 
     7. nuttx/graphics/nxfonts/Makefile.sources.  This is the Makefile used
@@ -175,12 +178,12 @@ Installing New Fonts
        was used in nuttx/graphics/nxfonts/Make.defs):
 
        ifeq ($(NXFONTS_FONTID),1)
-       NXFONTS_PREFIX	:= g_sans23x27_
-       GEN_CSRC	= nxfonts_bitmaps_sans23x27.c
+       NXFONTS_PREFIX := g_sans23x27_
+       GEN_CSRC = nxfonts_bitmaps_sans23x27.c
        endif
        ifeq ($(NXFONTS_FONTID),2)
-       NXFONTS_PREFIX	:= g_myfont_
-       GEN_CSRC	= nxfonts_bitmaps_myfont.c
+       NXFONTS_PREFIX := g_myfont_
+       GEN_CSRC = nxfonts_bitmaps_myfont.c
        endif
 
     8. graphics/nxfonts/nxfonts_bitmaps.c.  This is the file that contains
@@ -314,6 +317,36 @@ CONFIG_NXFONT_SERIF38X49B
   This option enables support for a large, 38x49 bold font (with serifs)
   (font ID FONTID_SERIF38X49B == 13).
 
+NxConsole Configuration Settings:
+
+CONFIG_NXCONSOLE_BPP
+  Currently, NxConsole supports only a single pixel depth. This
+  configuration setting must be provided to support that single pixel depth.
+  Default: The smallest enabled pixel depth. (see CONFIG_NX_DISABLE_*BPP)
+CONFIG_NXCONSOLE_NOGETRUN
+  NxConsole needs to know if it can read from the LCD or not. If reading
+  from the LCD is supported, then NxConsole can do more efficient
+  scrolling. Default: Supported
+CONFIG_NXCONSOLE_MXCHARS
+  NxConsole needs to remember every character written to the console so
+  that it can redraw the window. This setting determines the size of some
+  internal memory allocations used to hold the character data. Default: 128.
+CONFIG_NXCONSOLE_FONTCACHE
+  If this setting is defined, then caching of fonts will be supported by
+  NxConsole. Each font must be rendered from the tiny font storage format
+  to the full display size and pixel depth. If this setting is defined, then
+  the more recently used font glyphs will be retained in a cache of size
+  CONFIG_NXCONSOLE_CACHESIZE. Default: No font caching.
+CONFIG_NXCONSOLE_CACHESIZE
+  If CONFIG_NXCONSOLE_FONTCACHE, then this setting will control the size
+  of the font cache (in number of glyphs).  Default: 16.
+CONFIG_NXCONSOLE_LINESEPARATION
+  This the space (in rows) between each row of test.  Default: 2
+CONFIG_NXCONSOLE_NOWRAP
+  By default, lines will wrap when the test reaches the right hand side
+  of the window. This setting can be defining to change this behavior so
+  that the text is simply truncated until a new line is  encountered.
+
 NX Multi-user only options:
 
 CONFIG_NX_BLOCKING
diff --git a/nuttx/graphics/nxconsole/Make.defs b/nuttx/graphics/nxconsole/Make.defs
index e77f9450c..df84d758d 100644
--- a/nuttx/graphics/nxconsole/Make.defs
+++ b/nuttx/graphics/nxconsole/Make.defs
@@ -34,5 +34,6 @@
 ############################################################################
 
 NXCON_ASRCS  =
-NXCON_CSRCS  = nx_register.c nxcon_driver.c nxcon_font.c nxcon_register.c
-NXCON_CSRCS += nxcon_unregister.c nxtk_register.c nxtool_register.c 
+NXCON_CSRCS  = nx_register.c nxcon_driver.c nxcon_font.c nxcon_redraw.c
+NXCON_CSRCS += nxcon_register.c nxcon_scroll.c nxcon_unregister.c
+NXCON_CSRCS += nxtk_register.c nxtool_register.c 
diff --git a/nuttx/graphics/nxconsole/nxcon_driver.c b/nuttx/graphics/nxconsole/nxcon_driver.c
index 58ad027fe..60ed3242a 100755
--- a/nuttx/graphics/nxconsole/nxcon_driver.c
+++ b/nuttx/graphics/nxconsole/nxcon_driver.c
@@ -126,12 +126,21 @@ static ssize_t nxcon_write(FAR struct file *filep, FAR const char *buffer,
   FAR struct nxcon_state_s *priv;
   char ch;
   int lineheight;
+  int ret;
 
   /* Recover our private state structure */
 
   DEBUGASSERT(filep && filep->f_priv);
   priv = (FAR struct nxcon_state_s *)filep->f_priv;
 
+  /* Get exclusive access */
+
+  ret = sem_wait(&priv->exclsem);
+  if (ret < 0)
+    {
+      return ret;
+    }
+
   /* Loop writing each character to the display */
 
   lineheight = (priv->fheight + CONFIG_NXCONSOLE_LINESEPARATION);
@@ -185,6 +194,7 @@ static ssize_t nxcon_write(FAR struct file *filep, FAR const char *buffer,
       nxcon_putc(priv, (uint8_t)ch);
     }
 
+  sem_post(&priv->exclsem);
   return buflen;
 }
 
diff --git a/nuttx/graphics/nxconsole/nxcon_internal.h b/nuttx/graphics/nxconsole/nxcon_internal.h
index 590c169e6..27b963d73 100644
--- a/nuttx/graphics/nxconsole/nxcon_internal.h
+++ b/nuttx/graphics/nxconsole/nxcon_internal.h
@@ -58,8 +58,8 @@
 /* Configuration ************************************************************/
 /* The maximum number of characters that can be remembered */
 
-#ifndef CONFIG_NXCONSOLE_BMCACHE
-#  define CONFIG_NXCONSOLE_BMCACHE 128
+#ifndef CONFIG_NXCONSOLE_MXCHARS
+#  define CONFIG_NXCONSOLE_MXCHARS 128
 #endif
 
 /* Font cache -- this is the number or pre-rendered font glyphs that can be
@@ -67,11 +67,33 @@
  */
 
 #ifdef CONFIG_NXCONSOLE_FONTCACHE
-#  ifndef CONFIG_NXCONSOLE_GLCACHE
-#    define CONFIG_NXCONSOLE_GLCACHE 16
+#  ifndef CONFIG_NXCONSOLE_CACHESIZE
+#    define CONFIG_NXCONSOLE_CACHESIZE 16
 #  endif
 #else
-#  undef CONFIG_NXCONSOLE_GLCACHE
+#  undef CONFIG_NXCONSOLE_CACHESIZE
+#endif
+
+/* Pixel depth */
+
+#ifndef CONFIG_NXCONSOLE_BPP
+#  if !defined(CONFIG_NX_DISABLE_1BPP)
+#    define CONFIG_NXCONSOLE_BPP 1
+#  elif !defined(CONFIG_NX_DISABLE_2BPP)
+#    define CONFIG_NXCONSOLE_BPP 2
+#  elif !defined(CONFIG_NX_DISABLE_4BPP)
+#    define CONFIG_NXCONSOLE_BPP 4
+#  elif !defined(CONFIG_NX_DISABLE_8BPP)
+#    define CONFIG_NXCONSOLE_BPP 8
+#  elif !defined(CONFIG_NX_DISABLE_16BPP)
+#    define CONFIG_NXCONSOLE_BPP 16
+//#elif !defined(CONFIG_NX_DISABLE_24BPP)
+//#    define CONFIG_NXCONSOLE_BPP 24
+#  elif !defined(CONFIG_NX_DISABLE_32BPP)
+#    define CONFIG_NXCONSOLE_BPP 32
+#  else
+#    error "No pixel depth provided"
+#  endif
 #endif
 
 /* Space (in rows) between lines */
@@ -164,12 +186,12 @@ struct nxcon_state_s
 
   /* Font cache data storage */
 
-  struct nxcon_bitmap_s bm[CONFIG_NXCONSOLE_BMCACHE];
+  struct nxcon_bitmap_s bm[CONFIG_NXCONSOLE_MXCHARS];
 
   /* Glyph cache data storage */
 
 #ifdef CONFIG_NXCONSOLE_FONTCACHE
-  struct nxcon_glyph_s  glyph[CONFIG_NXCONSOLE_GLCACHE];
+  struct nxcon_glyph_s  glyph[CONFIG_NXCONSOLE_CACHESIZE];
 #else
   /* A glyph cache of size one -- all fonts will be re-rendered on each use */
 
diff --git a/nuttx/graphics/nxconsole/nxcon_redraw.c b/nuttx/graphics/nxconsole/nxcon_redraw.c
new file mode 100755
index 000000000..23bebd622
--- /dev/null
+++ b/nuttx/graphics/nxconsole/nxcon_redraw.c
@@ -0,0 +1,131 @@
+/****************************************************************************
+ * nuttx/graphics/nxconsole/nxcon_bkgd.c
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <assert.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/nx/nx.h>
+#include <nuttx/nx/nxglib.h>
+
+#include "nxcon_internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxcon_redraw
+ *
+ * Description:
+ *   Re-draw a portion of the NX console.  This function should be called
+ *   from the appropriate window callback logic.
+ *
+ * Input Parameters:
+ *   handle - A handle previously returned by nx_register, nxtk_register, or
+ *     nxtool_register.
+ *   rect - The rectangle that needs to be re-drawn (in window relative
+ *          coordinates)
+ *   more - true:  More re-draw requests will follow
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void nxcon_redraw(NXCONSOLE handle, FAR const struct nxgl_rect_s *rect, bool more)
+{
+  FAR struct nxcon_state_s *priv;
+  int ret;
+  int i;
+
+  DEBUGASSERT(handle && rect);
+  gvdbg("rect={(%d,%d),(%d,%d)} more=%s\n",
+        rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y,
+        more ? "true" : "false");
+
+  /* Recover our private state structure */
+
+  priv = (FAR struct nxcon_state_s *)handle;
+
+  /* Fill the rectangular region with the window background color */
+
+  ret = priv->ops->fill(priv, rect, priv->wndo.wcolor);
+  if (ret < 0)
+    {
+      gdbg("fill failed: %d\n", errno);
+    }
+
+  /* Then redraw each character on the display (Only the characters within
+   * the rectangle will actually be redrawn).
+   */
+
+  for (i = 0; i < priv->nchars; i++)
+    {
+      nxcon_fillchar(priv, rect, &priv->bm[i]);
+    }
+}
diff --git a/nuttx/graphics/nxconsole/nxcon_register.c b/nuttx/graphics/nxconsole/nxcon_register.c
index 9ed42c74d..cc878b239 100644
--- a/nuttx/graphics/nxconsole/nxcon_register.c
+++ b/nuttx/graphics/nxconsole/nxcon_register.c
@@ -122,9 +122,9 @@ FAR struct nxcon_state_s *
 
   /* Set up the text caches */
 
-  priv->maxchars  = CONFIG_NXCONSOLE_BMCACHE;
+  priv->maxchars  = CONFIG_NXCONSOLE_MXCHARS;
 #ifdef CONFIG_NXCONSOLE_FONTCACHE
-  priv->maxglyphs = CONFIG_NXCONSOLE_GLCACHE;
+  priv->maxglyphs = CONFIG_NXCONSOLE_CACHESIZE;
 #endif
 
   /* Set the initial display position */
diff --git a/nuttx/graphics/nxconsole/nxcon_scroll.c b/nuttx/graphics/nxconsole/nxcon_scroll.c
new file mode 100755
index 000000000..81bd3a7e8
--- /dev/null
+++ b/nuttx/graphics/nxconsole/nxcon_scroll.c
@@ -0,0 +1,239 @@
+/****************************************************************************
+ * nuttx/graphics/nxconsole/nxcon_scroll.c
+ *
+ *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <semaphore.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/nx/nx.h>
+#include <nuttx/nx/nxfonts.h>
+
+#include "nxcon_internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxcon_movedisplay
+ *
+ * Description:
+ *   This function implements the data movement for the scroll operation.  If
+ *   we can read the displays framebuffer memory, then the job is pretty
+ *   easy.  However, many displays (such as SPI-based LCDs) are often read-
+ *   only.
+ ****************************************************************************/
+
+#ifndef CONFIG_NXCONSOLE_NOGETRUN
+static inline void nxcon_movedisplay(FAR struct nxcon_state_s *priv,
+                                     int bottom, int scrollheight)
+{
+  FAR struct nxcon_bitmap_s *bm;
+  struct nxgl_rect_s rect;
+  nxgl_coord_t row;
+  int ret;
+  int i;
+
+  /* Move each row, one at a time.  They could all be moved at once (by calling
+   * nxcon_redraw), but the since the region is cleared, then re-written, the
+   * effect would not be good.  Below the region is also cleared and re-written,
+   * however, in much smaller chunks.
+   */
+
+  rect.pt1.x = 0;
+  rect.pt2.x = priv->wndo.wsize.w - 1;
+
+  for (row = CONFIG_NXCONSOLE_LINESEPARATION; row < bottom; row += scrollheight)
+    {
+      /* Create a bounding box the size of one row of characters */
+
+      rect.pt1.y = row;
+      rect.pt2.y = row + scrollheight - 1;
+
+      /* Clear the region */
+
+      ret = priv->ops->fill(priv, &rect, priv->wndo.wcolor);
+      if (ret < 0)
+        {
+          gdbg("fill failed: %d\n", errno);
+        }
+
+      /* Fill each character that might lie within in the bounding box */
+
+      for (i = 0; i < priv->nchars; i++)
+        {
+          bm = &priv->bm[i];
+          if (bm->pos.y <= rect.pt2.y && bm->pos.y + priv->fheight >= rect.pt1.y)
+            {
+              nxcon_fillchar(priv, &rect, bm);
+            }
+        }
+    }
+
+  /* Finally, clear the bottom part of the display */
+
+  rect.pt1.y = bottom;
+  rect.pt2.y = priv->wndo.wsize.h- 1;
+
+  ret = priv->ops->fill(priv, &rect, priv->wndo.wcolor);
+  if (ret < 0)
+    {
+      gdbg("nxcon_movedisplay: fill failed: %d\n", errno);
+    }
+}
+#else
+static inline void nxcon_movedisplay(FAR struct nxcon_state_s *priv,
+                                     int bottom, int scrollheight)
+{
+  struct nxgl_rect_s rect;
+  struct nxgl_point_s offset;
+  int ret;
+
+  /* Move the display in the range of 0-height up one scrollheight.  The
+   * line at the bottom will be reset to the background color automatically.
+   *
+   * The source rectangle to be moved.
+   */
+
+  rect.pt1.x = 0;
+  rect.pt1.y = scrollheight + CONFIG_NXCONSOLE_LINESEPARATION;
+  rect.pt2.x = priv->wndo.wsize.w - 1;
+  rect.pt2.y = priv->wndo.wsize.h - 1;
+
+  /* The offset that determines how far to move the source rectangle */
+
+  offset.x   = 0;
+  offset.y   = -scrollheight;
+
+  /* Move the source rectangle */
+
+  ret = priv->move(priv, &rect, &offset);
+  if (ret < 0)
+    {
+      gdbg("move failed: %d\n", errno);
+    }
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxcon_scroll
+ ****************************************************************************/
+
+void nxcon_scroll(FAR struct nxcon_state_s *priv, int scrollheight)
+{
+  int i;
+  int j;
+
+  /* Adjust the vertical position of each character */
+
+  for (i = 0; i < priv->nchars; )
+    {
+      FAR struct nxcon_bitmap_s *bm = &priv->bm[i];
+
+      /* Has any part of this character scrolled off the screen? */
+
+      if (bm->pos.y < scrollheight + CONFIG_NXCONSOLE_LINESEPARATION)
+        {
+          /* Yes... Delete the character by moving all of the data */
+
+          for (j = i; j < priv->nchars-1; j++)
+            {
+              memcpy(&priv->bm[j], &priv->bm[j+1], sizeof(struct nxcon_bitmap_s));
+            }
+
+          /* Decrement the number of cached characters ('i' is not incremented
+           * in this case because it already points to the next character)
+           */
+
+          priv->nchars--;
+        }
+
+      /* No.. just decrement its vertical position (moving it "up" the
+       * display by one line).
+       */
+
+      else
+        {
+          bm->pos.y -= scrollheight;
+
+          /* We are keeping this one so increment to the next character */
+ 
+          i++;
+        }
+    }
+
+  /* And move the next display position up by one line as well */
+
+  priv->fpos.y -= scrollheight;
+
+  /* Move the display in the range of 0-height up one scrollheight. */
+
+  nxcon_movedisplay(priv, priv->fpos.y, scrollheight);
+}
\ No newline at end of file