Add X11 simulated framebuffer

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1359 42af7a65-404d-4744-a932-0658087f49c3

7 files changed, 937 insertions, 17 deletions

diff --git a/nuttx/arch/sim/src/Makefile b/nuttx/arch/sim/src/Makefile
index 765a92aa1..6897f2f63 100644
--- a/nuttx/arch/sim/src/Makefile
+++ b/nuttx/arch/sim/src/Makefile
@@ -45,7 +45,7 @@ CSRCS		= up_initialize.c up_idle.c up_interruptcontext.c \
 		  up_releasepending.c up_reprioritizertr.c \
 		  up_exit.c up_schedulesigaction.c up_allocateheap.c \
 		  up_devconsole.c up_framebuffer.c
-HOSTSRCS	= up_stdio.c
+HOSTSRCS	= up_stdio.c up_x11framebuffer.c
 ifeq ($(CONFIG_FS_FAT),y)
 CSRCS		+= up_blockdevice.c up_deviceimage.c
 endif
@@ -63,7 +63,7 @@ SRCS		= $(ASRCS) $(CSRCS) $(HOSTSRCS)
 OBJS		= $(AOBJS) $(COBJS) $(HOSTOBJS)
 
 LDFLAGS		= $(ARCHSCRIPT)
-STDLIBS		= -lc
+STDLIBS		= -lX11 -lXext -lc
 ifeq ($(CONFIG_FS_FAT),y)
 STDLIBS		+= -lz
 endif
diff --git a/nuttx/arch/sim/src/up_framebuffer.c b/nuttx/arch/sim/src/up_framebuffer.c
index 31bb1d459..f81a5512b 100644
--- a/nuttx/arch/sim/src/up_framebuffer.c
+++ b/nuttx/arch/sim/src/up_framebuffer.c
@@ -114,6 +114,21 @@ static int up_setcursor(FAR struct fb_vtable_s *vtable, FAR struct fb_setcursor_
 #endif
 
 /****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef CONFIG_SIM_X11FB
+extern int up_x11initialize(unsigned short width, unsigned short height,
+                            void **fbmem, unsigned int *fblen, unsigned char *bpp,
+                            unsigned short *stride);
+#ifdef CONFIG_FB_CMAP
+extern int up_x11cmap(unsigned short first, unsigned short len,
+                      unsigned char *red, unsigned char *green,
+                      unsigned char *blue, unsigned char  *transp)
+#endif
+#endif
+
+/****************************************************************************
  * Private Data
  ****************************************************************************/
 
@@ -129,6 +144,7 @@ static const struct fb_videoinfo_s g_videoinfo =
   .nplanes  = 1,
 };
 
+#ifndef CONFIG_SIM_X11FB
 /* This structure describes the single, simulated color plane */
 
 static const struct fb_planeinfo_s g_planeinfo =
@@ -138,6 +154,11 @@ static const struct fb_planeinfo_s g_planeinfo =
   .stride   = FB_WIDTH,
   .bpp      = CONFIG_SIM_FBBPP,
 };
+#else
+/* This structure describes the single, X11 color plane */
+
+static struct fb_planeinfo_s g_planeinfo;
+#endif
 
 /* Simulated RGB mapping */
 
@@ -224,6 +245,9 @@ static int up_getplaneinfo(FAR struct fb_vtable_s *vtable, int planeno,
 #ifdef CONFIG_FB_CMAP
 static int up_getcmap(FAR struct fb_vtable_s *vtable, FAR struct fb_cmap_s *cmap)
 {
+#ifdef CONFIG_SIM_X11FB
+  return up_x11cmap(cmap->start, cmap->len, cmap->red, cmap->green, cmap->blue, cmap->transp);
+#else
   int len
   int i;
 
@@ -244,6 +268,7 @@ static int up_getcmap(FAR struct fb_vtable_s *vtable, FAR struct fb_cmap_s *cmap
     }
   dbg("Returning EINVAL\n");
   return -EINVAL;
+#endif
 }
 #endif
 
@@ -345,7 +370,13 @@ static int up_setcursor(FAR struct fb_vtable_s *vtable,
 
 int up_fbinitialize(void)
 {
+#ifdef CONFIG_SIM_X11FB
+  return up_x11initialize(CONFIG_SIM_FBWIDTH, CONFIG_SIM_FBHEIGHT,
+                          &g_planeinfo.fbmem, &g_planeinfo.fblen,
+                          &g_planeinfo.bpp, &g_planeinfo.stride);
+#else
   return OK;
+#endif
 }
 
 /****************************************************************************
diff --git a/nuttx/arch/sim/src/up_x11framebuffer.c b/nuttx/arch/sim/src/up_x11framebuffer.c
new file mode 100644
index 000000000..d19a56f80
--- /dev/null
+++ b/nuttx/arch/sim/src/up_x11framebuffer.c
@@ -0,0 +1,413 @@
+/****************************************************************************
+ * arch/sim/src/up_framebuffer.c
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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
+ ****************************************************************************/
+
+#define CONFIG_SIM_X11NOSHM 1
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <sys/ipc.h>
+
+#ifndef CONFIG_SIM_X11NOSHM
+#  include <sys/shm.h>
+#  include <X11/extensions/XShm.h>
+#endif
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ***************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+static Display *g_display;
+static int g_screen;
+static Window g_window;
+static GC g_gc;
+#ifndef CONFIG_SIM_X11NOSHM
+static XShmSegmentInfo g_xshminfo;
+static int g_xerror;
+#endif
+static XImage *g_image;
+static unsigned char *g_framebuffer;
+static unsigned short g_fbpixelwidth;
+static unsigned short g_fbpixelheight;
+static int g_shmcheckpoint = 0;
+static int b_useshm;
+
+/****************************************************************************
+ * Name: up_x11createframe
+ ***************************************************************************/
+
+static inline int up_x11createframe(void)
+{
+  XGCValues gcval;
+  char *argv[2] = { "nuttx", NULL };
+  char *winName = "NuttX";
+  char *iconName = "NX";
+  XTextProperty winprop;
+  XTextProperty iconprop;
+  XSizeHints hints;
+
+  g_display = XOpenDisplay(NULL);
+  if (g_display == NULL)
+    {
+      printf("Unable to open display.\n");
+      return -1;
+    }
+
+  g_screen = DefaultScreen(g_display);
+  g_window = XCreateSimpleWindow(g_display, DefaultRootWindow(g_display),
+                               0, 0, g_fbpixelwidth, g_fbpixelheight, 2,
+                               BlackPixel(g_display, g_screen),
+                               BlackPixel(g_display, g_screen));
+
+  XStringListToTextProperty(&winName, 1, &winprop);
+  XStringListToTextProperty(&iconName, 1, &iconprop);
+
+  hints.flags = PSize | PMinSize | PMaxSize;
+  hints.width = hints.min_width  = hints.max_width  = g_fbpixelwidth;
+  hints.height= hints.min_height = hints.max_height = g_fbpixelheight;
+
+  XSetWMProperties(g_display, g_window, &winprop, &iconprop, argv, 1,
+                   &hints, NULL, NULL);
+
+  XMapWindow(g_display, g_window);
+  XSelectInput(g_display, g_window,
+               ButtonPressMask | ButtonReleaseMask |
+               ButtonMotionMask | KeyPressMask | ExposureMask);
+  gcval.graphics_exposures = 0;
+  g_gc = XCreateGC(g_display, g_window, GCGraphicsExposures, &gcval);
+  return 0;
+}
+
+/****************************************************************************
+ * Name: up_x11errorhandler
+ ***************************************************************************/
+
+#ifndef CONFIG_SIM_X11NOSHM
+static int up_x11errorhandler(Display *display, XErrorEvent *event)
+{
+  g_xerror = 1;
+  return 0;
+}
+#endif
+
+/****************************************************************************
+ * Name: up_x11traperrors
+ ***************************************************************************/
+
+#ifndef CONFIG_SIM_X11NOSHM
+static void up_x11traperrors(void)
+{
+  g_xerror = 0;
+  XSetErrorHandler(up_x11errorhandler);
+}
+#endif
+
+/****************************************************************************
+ * Name: up_x11untraperrors
+ ***************************************************************************/
+
+#ifndef CONFIG_SIM_X11NOSHM
+static int up_x11untraperrors(void)
+{
+  XSync(g_display,0);
+  XSetErrorHandler(NULL);
+  return g_xerror;
+}
+#endif
+
+/****************************************************************************
+ * Name: up_x11uninitialize
+ ***************************************************************************/
+
+void up_x11uninitialize(void)
+{
+  fprintf(stderr, "Uninitalizing\n");
+#ifndef CONFIG_SIM_X11NOSHM
+  if (g_shmcheckpoint > 4)
+    {
+      XShmDetach(g_display, &g_xshminfo);
+    }
+
+  if (g_shmcheckpoint > 3)
+    {
+      shmdt(g_xshminfo.shmaddr);
+    }
+
+  if (g_shmcheckpoint > 2)
+    {
+      shmctl(g_xshminfo.shmid, IPC_RMID, 0);
+    }
+#endif
+
+  if (g_shmcheckpoint > 1)
+    {
+      XDestroyImage(g_image);
+      if (!b_useshm)
+        {
+          free(g_framebuffer);
+        }
+    }
+
+  if (g_shmcheckpoint > 0)
+    {
+      g_shmcheckpoint = 1;
+    }
+  XCloseDisplay(g_display);
+}
+
+/****************************************************************************
+ * Name: up_x11mapsharedmem
+ ***************************************************************************/
+
+static inline int up_x11mapsharedmem(int bpp, unsigned int fblen)
+{
+#ifndef CONFIG_SIM_X11NOSHM
+  Status result;
+#endif
+
+  atexit(up_x11uninitialize);
+  g_shmcheckpoint = 1;
+  b_useshm = 0;
+
+#ifndef CONFIG_SIM_X11NOSHM
+  if (XShmQueryExtension(g_display))
+    {
+      b_useshm = 1;
+      printf("Using shared memory.\n");
+
+      up_x11traperrors();
+      g_image = XShmCreateImage(g_display, DefaultVisual(g_display, g_screen), 
+                              bpp, ZPixmap, NULL, &g_xshminfo,
+                              g_fbpixelwidth, g_fbpixelheight);
+      if (up_x11untraperrors())
+        {
+          up_x11uninitialize();
+          goto shmerror;
+        }
+      if (!g_image)
+        {
+          fprintf(stderr,"Unable to create g_image.");
+          return -1;
+        }
+      g_shmcheckpoint++;
+
+      g_xshminfo.shmid = shmget(IPC_PRIVATE,
+                              g_image->bytes_per_line * g_image->height,
+                              IPC_CREAT | 0777);
+      if (g_xshminfo.shmid < 0)
+        {
+          up_x11uninitialize();
+          goto shmerror;
+        }
+      g_shmcheckpoint++;
+
+      g_image->data = (char *) shmat(g_xshminfo.shmid, 0, 0);
+      if (g_image->data == ((char *) -1))
+        {
+          up_x11uninitialize();
+          goto shmerror;
+        }
+      g_shmcheckpoint++;
+
+      g_xshminfo.shmaddr = g_image->data;
+      g_xshminfo.readOnly = 0;
+
+      up_x11traperrors();
+      result = XShmAttach(g_display, &g_xshminfo);
+      if (up_x11untraperrors() || !result)
+        {
+          up_x11uninitialize();
+          goto shmerror;
+        }
+
+      g_shmcheckpoint++;
+
+    }
+  else
+#endif
+  if (!b_useshm)
+    {
+#ifndef CONFIG_SIM_X11NOSHM
+shmerror:
+#endif
+      b_useshm = 0;
+
+      g_framebuffer = (unsigned char*)malloc(fblen);
+
+      g_image = XCreateImage(g_display, DefaultVisual(g_display,g_screen), bpp,
+                             ZPixmap, 0, (char *) g_framebuffer, g_fbpixelwidth, g_fbpixelheight,
+                             8, 0);
+
+      if (g_image == NULL)
+         {
+            fprintf(stderr, "Unable to create g_image\n");
+            return -1;
+         }
+
+      g_shmcheckpoint++;
+    }
+  return 0;
+}
+
+/****************************************************************************
+ * Name: up_x11update
+ ***************************************************************************/
+
+static void up_x11update(void)
+{
+#ifndef CONFIG_SIM_X11NOSHM
+  if (b_useshm)
+    {
+      XShmPutImage(g_display, g_window, g_gc, g_image, 0, 0, 0, 0,
+                   g_fbpixelwidth, g_fbpixelheight, 0);
+    }
+  else
+#endif
+    {
+      XPutImage(g_display, g_window, g_gc, g_image, 0, 0, 0, 0,
+                g_fbpixelwidth, g_fbpixelheight);
+    }
+  XSync(g_display, 0);
+}
+
+/****************************************************************************
+ * Public Functions
+ ***************************************************************************/
+
+/****************************************************************************
+ * Name: up_x11initialize
+ *
+ * Description:
+ *   Make an X11 window look like a frame buffer.
+ *
+ ***************************************************************************/
+
+int up_x11initialize(unsigned short width, unsigned short height,
+                     void **fbmem, unsigned int *fblen, unsigned char *bpp,
+                     unsigned short *stride)
+{
+  XWindowAttributes windowAttributes;
+  int ret;
+
+  /* Save inputs */
+
+  g_fbpixelwidth  = width;
+  g_fbpixelheight = height;
+
+  /* Create the X11 window */
+
+  ret = up_x11createframe();
+  if (ret < 0)
+    {
+      return ret;
+    }
+
+  /* Determine the supported pixel bpp of the current window */
+
+  XGetWindowAttributes(g_display, DefaultRootWindow(g_display), &windowAttributes);
+  printf("Pixel bpp is %d bits\n", windowAttributes.depth);
+
+  *bpp    = windowAttributes.depth;
+  *stride = (windowAttributes.depth * width / 8);
+  *fbmem  = (void*)g_framebuffer;
+  *fblen  = (*stride * height);
+
+  /* Map the window to shared memory */
+
+  up_x11mapsharedmem(windowAttributes.depth, *fblen);
+  return 0;
+}
+
+/****************************************************************************
+ * Name: up_x11cmap
+ ***************************************************************************/
+
+int up_x11cmap(unsigned short first, unsigned short len,
+               unsigned char *red, unsigned char *green,
+               unsigned char *blue, unsigned char  *transp)
+{
+  Colormap cMap;
+  int ndx;
+
+  printf("Creating Colormap\n");
+
+  /* Convert each color to X11 scaling */
+
+  cMap = DefaultColormap(g_display, g_screen);
+  for (ndx = first; ndx < first + len; ndx++)
+    {
+      XColor color;
+
+     /* Convert to RGB.  In the NuttX cmap, each component
+      * ranges from 0-255; for X11 the range is 0-65536 */
+
+     color.red   = (short)(*red++) << 8;
+     color.green = (short)(*green++) << 8;
+     color.blue  = (short)(*blue++) << 8;
+     color.flags = DoRed | DoGreen | DoBlue;
+
+     /* Then allocate a color for this selection */
+
+     if (!XAllocColor(g_display, cMap, &color))
+       {
+         fprintf(stderr, "Failed to allocate color%d\n", ndx);
+         return -1;
+       }
+    }
+
+  return 0;
+}
diff --git a/nuttx/configs/ntosd-dm320/README.txt b/nuttx/configs/ntosd-dm320/README.txt
index 268f1732c..7158e34e2 100644
--- a/nuttx/configs/ntosd-dm320/README.txt
+++ b/nuttx/configs/ntosd-dm320/README.txt
@@ -118,11 +118,12 @@ can be selected as follow:
 
 Where <subdir> is one of the following:
 
-ostest
-^^^^^^
+nettest
+^^^^^^^
 
-This configuration directory, performs a simple OS test using
-examples/ostest.
+This alternative configuration directory may be used to
+enable networking using the OSDs DM9000A Ethernet interface.
+It uses examples/nettest to excercise the TCP/IP network.
 
 nsh
 ^^^
@@ -130,12 +131,11 @@ nsh
 Configures the NuttShell (nsh) located at examples/nsh.  The
 Configuration enables both the serial and telnetd NSH interfaces.
 
-nettest
-^^^^^^^
+ostest
+^^^^^^
 
-This alternative configuration directory may be used to
-enable networking using the OSDs DM9000A Ethernet interface.
-It uses examples/nettest to excercise the TCP/IP network.
+This configuration directory, performs a simple OS test using
+examples/ostest.
 
 poll
 ^^^^
@@ -143,18 +143,18 @@ poll
 This configuration exercises the poll()/select() text at
 examples/poll
 
-uip
-^^^
-
-This configuration file demonstrates the tiny webserver
-at examples/uip.
-
 udp
 ^^^
 
 This alternative configuration directory is similar to nettest
 except that is use examples/upd to exercise UDP.
 
+uip
+^^^
+
+This configuration file demonstrates the tiny webserver
+at examples/uip.
+
 Configuration Options
 ^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/nuttx/configs/sim/README.txt b/nuttx/configs/sim/README.txt
index 511a3b80f..8e8fe42f1 100644
--- a/nuttx/configs/sim/README.txt
+++ b/nuttx/configs/sim/README.txt
@@ -34,6 +34,23 @@ nx
     cd <nuttx-directory>/tools
     ./Configure.sh sim/nx
 
+  Special simulated framebuffer configuration options:
+
+  CONFIG_SIM_X11FB    - Use X11 window for framebuffer
+  CONFIG_SIM_FBHEIGHT - Height of the framebuffer in pixels
+  CONFIG_SIM_FBWIDTH  - Width of the framebuffer in pixels.
+  CONFIG_SIM_FBBPP    - Pixel depth in bits
+
+  NOTES:
+  - If CONFIG_SIM_X11FB is selected then CONFIG_SIM_FBBPP must
+    match the resolution of the display.
+  - For whatever value of CONFIG_SIM_FBBPP is selected, then
+    the corresponing CONFIG_NXGLIB_DISABLE_*BPP setting must
+    not be disabled.
+  - The default in defconfig is to use a generic memory buffer
+    for the framebuffer.  defconfig-x11 is an example with X11
+    support enabled.
+
 ostest
 
   The "standard" NuttX examples/ostest configuration.  This
diff --git a/nuttx/configs/sim/nx/defconfig b/nuttx/configs/sim/nx/defconfig
index 126727b5a..1eaa2ca54 100644
--- a/nuttx/configs/sim/nx/defconfig
+++ b/nuttx/configs/sim/nx/defconfig
@@ -51,6 +51,7 @@ CONFIG_ARCH_BOARD_SIM=y
 
 #
 # Simulated framebuffer configuration
+CONFIG_SIM_X11FB=n
 CONFIG_SIM_FBWIDTH=480
 CONFIG_SIM_FBHEIGHT=240
 CONFIG_SIM_FBBPP=8
diff --git a/nuttx/configs/sim/nx/defconfig-x11 b/nuttx/configs/sim/nx/defconfig-x11
new file mode 100644
index 000000000..58ae6a81d
--- /dev/null
+++ b/nuttx/configs/sim/nx/defconfig-x11
@@ -0,0 +1,458 @@
+############################################################################
+# sim/nx/defconfig
+#
+#   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+#
+# 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.
+#
+############################################################################
+#
+# Architecture selection
+#
+# CONFIG_ARCH - identifies the arch subdirectory and, hence, the
+#   processor architecture.
+# CONFIG_ARCH_name - for use in C code.  This identifies the particular
+#   processor architecture (CONFIG_ARCH_SIM).
+# CONFIG_ARCH_BOARD - identifies the configs subdirectory and, hence,
+#   the board that supports the particular chip or SoC.
+# CONFIG_ARCH_BOARD_name - for use in C code
+# CONFIG_ENDIAN_BIG - define if big endian (default is little endian)
+#
+CONFIG_ARCH=sim
+CONFIG_ARCH_SIM=y
+CONFIG_ARCH_BOARD=sim
+CONFIG_ARCH_BOARD_SIM=y
+
+#
+# Simulated framebuffer configuration
+CONFIG_SIM_X11FB=y
+CONFIG_SIM_FBWIDTH=480
+CONFIG_SIM_FBHEIGHT=240
+CONFIG_SIM_FBBPP=24
+
+#
+# General OS setup
+#
+# CONFIG_EXAMPLE - identifies the subdirectory in examples
+#   that will be used in the build
+# CONFIG_DEBUG - enables built-in debug options
+# CONFIG_DEBUG_VERBOSE - enables verbose debug output
+# CONFIG_MM_REGIONS - 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_ARCH_LOWPUTC - architecture supports low-level, boot
+#   time console output
+# CONFIG_TICKS_PER_MSEC - The default system timer is 100Hz
+#   or TICKS_PER_MSEC=10.  This setting may be defined to
+#   inform NuttX that the processor hardware is providing
+#   system timer interrupts at some interrupt interval other
+#   than 10 msec.
+# CONFIG_RR_INTERVAL - The round robin timeslice will be set
+#   this number of milliseconds;  Round robin scheduling can
+#   be disabled by setting this value to zero.
+# CONFIG_SCHED_INSTRUMENTATION - enables instrumentation in 
+#   scheduler to monitor system performance
+# CONFIG_TASK_NAME_SIZE - Spcifies that maximum size of a
+#   task name to save in the TCB.  Useful if scheduler
+#   instrumentation is selected.  Set to zero to disable.
+# CONFIG_JULIAN_TIME - Enables Julian time conversions
+# CONFIG_START_YEAR, CONFIG_START_MONTH, CONFIG_START_DAY -
+#   Used to initialize the internal time logic.
+# CONFIG_DEV_CONSOLE - Set if architecture-specific logic
+#   provides /dev/console.  Enables stdout, stderr, stdin.
+# CONFIG_DEV_LOWCONSOLE - Use the simple, low-level serial console
+#   driver (minimul support)
+#
+CONFIG_EXAMPLE=nx
+CONFIG_DEBUG=y
+CONFIG_DEBUG_VERBOSE=y
+CONFIG_DEBUG_GRAPHICS=y
+CONFIG_MM_REGIONS=1
+CONFIG_ARCH_LOWPUTC=y
+CONFIG_RR_INTERVAL=0
+CONFIG_SCHED_INSTRUMENTATION=n
+CONFIG_TASK_NAME_SIZE=32
+CONFIG_START_YEAR=2008
+CONFIG_START_MONTH=11
+CONFIG_START_DAY=28
+CONFIG_JULIAN_TIME=n
+CONFIG_DEV_CONSOLE=y
+CONFIG_DEV_LOWCONSOLE=n
+
+#
+# The following can be used to disable categories of
+# APIs supported by the OS.  If the compiler supports
+# 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=n
+CONFIG_DISABLE_POSIX_TIMERS=y
+CONFIG_DISABLE_PTHREAD=y
+CONFIG_DISABLE_SIGNALS=y
+CONFIG_DISABLE_MQUEUE=y
+CONFIG_DISABLE_MOUNTPOINT=y
+CONFIG_DISABLE_ENVIRON=y
+CONFIG_DISABLE_POLL=y
+
+#
+# Misc libc settings
+#
+# CONFIG_NOPRINTF_FIELDWIDTH - sprintf-related logic is a
+#   little smaller if we do not support fieldwidthes
+#
+CONFIG_NOPRINTF_FIELDWIDTH=n
+
+#
+# Allow for architecture optimized implementations
+#
+# The architecture can provide optimized versions of the
+# following to improve sysem performance
+#
+CONFIG_ARCH_MEMCPY=n
+CONFIG_ARCH_MEMCMP=n
+CONFIG_ARCH_MEMMOVE=n
+CONFIG_ARCH_MEMSET=n
+CONFIG_ARCH_STRCMP=n
+CONFIG_ARCH_STRCPY=n
+CONFIG_ARCH_STRNCPY=n
+CONFIG_ARCH_STRLEN=n
+CONFIG_ARCH_BZERO=n
+CONFIG_ARCH_KMALLOC=n
+CONFIG_ARCH_KZMALLOC=n
+CONFIG_ARCH_KFREE=n
+
+#
+# General build options
+#
+# CONFIG_RRLOAD_BINARY - make the rrload binary format used with
+#   BSPs from www.ridgerun.com using the tools/mkimage.sh script
+# CONFIG_INTELHEX_BINARY - make the Intel HEX binary format
+#   used with many different loaders using the GNU objcopy program
+#   Should not be selected if you are not using the GNU toolchain.
+# CONFIG_RAW_BINARY - make a raw binary format file used with many
+#   different loaders using the GNU objcopy program.  This option
+#   should not be selected if you are not using the GNU toolchain.
+# CONFIG_HAVE_LIBM - toolchain supports libm.a
+#
+CONFIG_RRLOAD_BINARY=n
+CONFIG_INTELHEX_BINARY=n
+CONFIG_RAW_BINARY=n
+CONFIG_HAVE_LIBM=y
+
+#
+# Sizes of configurable things (0 disables)
+#
+# CONFIG_MAX_TASKS - The maximum number of simultaneously
+#   active tasks. This value must be a power of two.
+# CONFIG_MAX_TASK_ARGS - This controls the maximum number of
+#   of parameters that a task may receive (i.e., maxmum value
+#   of 'argc')
+# CONFIG_NPTHREAD_KEYS - The number of items of thread-
+#   specific data that can be retained
+# CONFIG_NFILE_DESCRIPTORS - The maximum number of file
+#   descriptors (one for each open)
+# CONFIG_NFILE_STREAMS - The maximum number of streams that
+#   can be fopen'ed
+# CONFIG_NAME_MAX - The maximum size of a file name.
+# CONFIG_STDIO_BUFFER_SIZE - Size of the buffer to allocate
+#   on fopen. (Only if CONFIG_NFILE_STREAMS > 0)
+# CONFIG_NUNGET_CHARS - Number of characters that can be
+#   buffered by ungetc() (Only if CONFIG_NFILE_STREAMS > 0)
+# CONFIG_PREALLOC_MQ_MSGS - The number of pre-allocated message
+#   structures.  The system manages a pool of preallocated
+#   message structures to minimize dynamic allocations
+# CONFIG_MQ_MAXMSGSIZE - Message structures are allocated with
+#   a fixed payload size given by this settin (does not include
+#   other message structure overhead.
+# CONFIG_MAX_WDOGPARMS - Maximum number of parameters that
+#   can be passed to a watchdog handler
+# CONFIG_PREALLOC_WDOGS - The number of pre-allocated watchdog
+#   structures.  The system manages a pool of preallocated
+#   watchdog structures to minimize dynamic allocations
+# CONFIG_PREALLOC_TIMERS - The number of pre-allocated POSIX
+#   timer structures.  The system manages a pool of preallocated
+#   timer structures to minimize dynamic allocations.  Set to
+#   zero for all dynamic allocations.
+#
+CONFIG_MAX_TASKS=16
+CONFIG_MAX_TASK_ARGS=4
+CONFIG_NPTHREAD_KEYS=4
+CONFIG_NFILE_DESCRIPTORS=16
+CONFIG_NFILE_STREAMS=16
+CONFIG_NAME_MAX=32
+CONFIG_STDIO_BUFFER_SIZE=1024
+CONFIG_NUNGET_CHARS=2
+CONFIG_PREALLOC_MQ_MSGS=32
+CONFIG_MQ_MAXMSGSIZE=32
+CONFIG_MAX_WDOGPARMS=4
+CONFIG_PREALLOC_WDOGS=32
+CONFIG_PREALLOC_TIMERS=8
+
+#
+# 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.
+# CONFIG_NET_SOCKOPTS - Enable or disable support for socket options
+# CONFIG_NET_BUFSIZE - uIP buffer size
+# CONFIG_NET_TCP - TCP support on or off
+# CONFIG_NET_TCP_CONNS - Maximum number of TCP connections (all tasks)
+# CONFIG_NET_TCP_READAHEAD_BUFSIZE - Size of TCP read-ahead buffers
+# CONFIG_NET_NTCP_READAHEAD_BUFFERS - Number of TCP read-ahead buffers (may be zero)
+# CONFIG_NET_TCPBACKLOG - Incoming connections pend in a backlog until
+#   accept() is called. The size of the backlog is selected when listen() is called.
+# CONFIG_NET_MAX_LISTENPORTS - Maximum number of listening TCP ports (all tasks)
+# CONFIG_NET_UDP - UDP support on or off
+# CONFIG_NET_UDP_CHECKSUMS - UDP checksums on or off
+# CONFIG_NET_UDP_CONNS - The maximum amount of concurrent UDP connections
+# CONFIG_NET_ICMP - ICMP ping response support on or off
+# CONFIG_NET_ICMP_PING - ICMP ping request support on or off
+# CONFIG_NET_PINGADDRCONF - Use "ping" packet for setting IP address
+# CONFIG_NET_STATISTICS - uIP statistics on or off
+# CONFIG_NET_RECEIVE_WINDOW - The size of the advertised receiver's window
+# CONFIG_NET_ARPTAB_SIZE - The size of the ARP table
+# CONFIG_NET_BROADCAST - Broadcast support
+# CONFIG_NET_LLH_LEN - The link level header length
+# CONFIG_NET_FWCACHE_SIZE - number of packets to remember when looking for duplicates
+CONFIG_NET=n
+CONFIG_NET_IPv6=n
+CONFIG_NSOCKET_DESCRIPTORS=0
+CONFIG_NET_SOCKOPTS=y
+CONFIG_NET_BUFSIZE=420
+CONFIG_NET_TCP=n
+CONFIG_NET_TCP_CONNS=40
+CONFIG_NET_MAX_LISTENPORTS=40
+CONFIG_NET_UDP=n
+CONFIG_NET_UDP_CHECKSUMS=y
+#CONFIG_NET_UDP_CONNS=10
+CONFIG_NET_ICMP=n
+CONFIG_NET_ICMP_PING=n
+#CONFIG_NET_PINGADDRCONF=0
+CONFIG_NET_STATISTICS=y
+#CONFIG_NET_RECEIVE_WINDOW=
+#CONFIG_NET_ARPTAB_SIZE=8
+CONFIG_NET_BROADCAST=n
+#CONFIG_NET_LLH_LEN=14
+#CONFIG_NET_FWCACHE_SIZE=2
+
+#
+# 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
+
+#
+# Graphics related configuration settings
+#
+# CONFIG_NXGRAPHICS
+#   Enables overall support for graphics library and NX
+# CONFIG_NX_MULTIUSER
+#   Configures NX in multi-user mode
+# CONFIG_NX_NPLANES
+#   Some YUV color formats requires support for multiple planes,
+#   one for each color component.  Unless you have such special
+#   hardware, this value should be undefined or set to 1
+# CONFIG_NXGLIB_DISABLE_1BPP, CONFIG_NXGLIB_DISABLE_2BPP,
+# CONFIG_NXGLIB_DISABLE_4BPP, CONFIG_NXGLIB_DISABLE_8BPP,
+# CONFIG_NXGLIB_DISABLE_16BPP, CONFIG_NXGLIB_DISABLE_24BPP, and
+# CONFIG_NXGLIB_DISABLE_32BPP
+#   NX supports a variety of pixel depths.  You can save some
+#   memory by disabling support for unused color depths.
+# CONFIG_NXGL_PACKEDMSFIRST
+#   If a pixel depth of less than 8-bits is used, then NX needs
+#   to know if the pixels pack from the MS to LS or from LS to MS
+# CONFIG_NX_MOUSE
+#   Build in support for mouse input
+# CONFIG_NX_KBD
+#   Build in support of keypad/keyboard input
+#
+# NX Multi-user only options:
+#
+# CONFIG_NX_BLOCKING
+#   Open the client message queues in blocking mode.  In this case,
+#   nx_eventhandler() will never return.
+# CONFIG_NX_MXSERVERMSGS and CONFIG_NX_MXCLIENTMSGS
+#   Specifies the maximum number of messages that can fit in
+#   the message queues.  No additional resources are allocated, but
+#   this can be set to prevent flooding of the client or server with
+#   too many messages (CONFIG_PREALLOC_MQ_MSGS controls how many
+#   messages are pre-allocated).
+CONFIG_NXGRAPHICS=y
+CONFIG_NX_MULTIUSER=n
+CONFIG_NX_NPLANES=1
+CONFIG_NXGLIB_DISABLE_1BPP=y
+CONFIG_NXGLIB_DISABLE_2BPP=y
+CONFIG_NXGLIB_DISABLE_4BPP=y
+CONFIG_NXGLIB_DISABLE_8BPP=y
+CONFIG_NXGLIB_DISABLE_16BPP=y
+CONFIG_NXGLIB_DISABLE_24BPP=n
+CONFIG_NXGLIB_DISABLE_32BPP=y
+CONFIG_NXGL_PACKEDMSFIRST=n
+CONFIG_NX_MOUSE=n
+CONFIG_NX_KBD=n
+CONFIG_NX_BLOCKING=n
+CONFIG_NX_MXSERVERMSGS=32
+CONFIG_NX_MXCLIENTMSGS=16
+
+#
+# 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)
+CONFIG_EXAMPLE_UIP_SMTP=n
+CONFIG_EXAMPLE_UIP_TELNETD=n
+CONFIG_EXAMPLE_UIP_WEBSERVER=y
+CONFIG_EXAMPLE_UIP_DHCPC=n
+CONFIG_EXAMPLE_UIP_WEBCLIENT=n
+
+#
+# Settings for examples/nettest
+CONFIG_EXAMPLE_NETTEST_SERVER=n
+CONFIG_EXAMPLE_NETTEST_PERFORMANCE=n
+CONFIG_EXAMPLE_NETTEST_NOMAC=n
+CONFIG_EXAMPLE_NETTEST_IPADDR=(192<<24|168<<16|0<<8|128)
+CONFIG_EXAMPLE_NETTEST_DRIPADDR=(192<<24|168<<16|0<<8|1)
+CONFIG_EXAMPLE_NETTEST_NETMASK=(255<<24|255<<16|255<<8|0)
+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
+
+#
+# Settings for examples/nsh
+#
+# CONFIG_EXAMPLES_NSH_FILEIOSIZE - Size of a static I/O buffer
+# CONFIG_EXAMPLES_NSH_STRERROR - Use strerror(errno)
+# CONFIG_EXAMPLES_NSH_LINELEN - Maximum length of one command line
+# CONFIG_EXAMPLES_NSH_STACKSIZE - Stack size to use for new threads.
+# CONFIG_EXAMPLES_NSH_NESTDEPTH - Max number of nested if-then[-else]-fi
+# CONFIG_EXAMPLES_NSH_DISABLESCRIPT - Disable scripting support
+# CONFIG_EXAMPLES_NSH_DISABLEBG - Disable background commands
+# CONFIG_EXAMPLES_NSH_ROMFSETC - Use startup script in /etc
+# CONFIG_EXAMPLES_NSH_CONSOLE - Use serial console front end
+# CONFIG_EXAMPLES_NSH_TELNET - Use telnetd console front end
+#
+# If CONFIG_EXAMPLES_NSH_TELNET is selected:
+# CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE -- Telnetd I/O buffer size
+# CONFIG_EXAMPLES_NSH_DHCPC - Obtain address using DHCP
+# CONFIG_EXAMPLES_NSH_IPADDR - Provides static IP address
+# CONFIG_EXAMPLES_NSH_DRIPADDR - Provides static router IP address
+# CONFIG_EXAMPLES_NSH_NETMASK - Provides static network mask
+# CONFIG_EXAMPLES_NSH_NOMAC - Use a bogus MAC address
+#
+# If CONFIG_EXAMPLES_NSH_ROMFSETC is selected:
+# CONFIG_EXAMPLES_NSH_ROMFSMOUNTPT - ROMFS mountpoint
+# CONFIG_EXAMPLES_NSH_INITSCRIPT - Relative path to init script
+# CONFIG_EXAMPLES_NSH_ROMFSDEVNO - ROMFS RAM device minor
+# CONFIG_EXAMPLES_NSH_ROMFSSECTSIZE - ROMF sector size
+# CONFIG_EXAMPLES_NSH_FATDEVNO - FAT FS RAM device minor
+# CONFIG_EXAMPLES_NSH_FATSECTSIZE - FAT FS sector size
+# CONFIG_EXAMPLES_NSH_FATNSECTORS - FAT FS number of sectors
+# CONFIG_EXAMPLES_NSH_FATMOUNTPT - FAT FS mountpoint
+CONFIG_EXAMPLES_NSH_FILEIOSIZE=1024
+CONFIG_EXAMPLES_NSH_STRERROR=n
+CONFIG_EXAMPLES_NSH_LINELEN=80
+CONFIG_EXAMPLES_NSH_STACKSIZE=4096
+CONFIG_EXAMPLES_NSH_NESTDEPTH=3
+CONFIG_EXAMPLES_NSH_DISABLESCRIPT=n
+CONFIG_EXAMPLES_NSH_DISABLEBG=n
+CONFIG_EXAMPLES_NSH_ROMFSETC=y
+CONFIG_EXAMPLES_NSH_CONSOLE=y
+CONFIG_EXAMPLES_NSH_TELNET=n
+CONFIG_EXAMPLES_NSH_IOBUFFER_SIZE=512
+CONFIG_EXAMPLES_NSH_DHCPC=n
+CONFIG_EXAMPLES_NSH_NOMAC=n
+CONFIG_EXAMPLES_NSH_IPADDR=(10<<24|0<<16|0<<8|2)
+CONFIG_EXAMPLES_NSH_DRIPADDR=(10<<24|0<<16|0<<8|1)
+CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
+CONFIG_EXAMPLES_NSH_ROMFSMOUNTPT="/etc"
+CONFIG_EXAMPLES_NSH_INITSCRIPT="init.d/rcS"
+CONFIG_EXAMPLES_NSH_ROMFSDEVNO=1
+CONFIG_EXAMPLES_NSH_ROMFSSECTSIZE=64
+CONFIG_EXAMPLES_NSH_FATDEVNO=2
+CONFIG_EXAMPLES_NSH_FATSECTSIZE=512
+CONFIG_EXAMPLES_NSH_FATNSECTORS=1024
+CONFIG_EXAMPLES_NSH_FATMOUNTPT=/tmp
+
+#
+# Settings for examples/mount
+CONFIG_EXAMPLES_MOUNT_DEVNAME="/dev/ram0"
+#CONFIG_EXAMPLES_MOUNT_NSECTORS=2048
+#CONFIG_EXAMPLES_MOUNT_SECTORSIZE=512
+#CONFIG_EXAMPLES_MOUNT_RAMDEVNO=1
+
+#
+# Stack and heap information
+#
+# CONFIG_BOOT_FROM_FLASH - Some configurations support XIP
+#   operation from FLASH.
+# CONFIG_CUSTOM_STACK - The up_ implementation will handle
+#   all stack operations outside of the nuttx model.
+# CONFIG_STACK_POINTER - The initial stack pointer
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
+# CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
+# CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
+# CONFIG_HEAP_BASE - The beginning of the heap
+# CONFIG_HEAP_SIZE - The size of the heap
+#
+CONFIG_BOOT_FROM_FLASH=n
+CONFIG_CUSTOM_STACK=n
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
+CONFIG_PTHREAD_STACK_MIN=256
+CONFIG_PTHREAD_STACK_DEFAULT=8192
+CONFIG_HEAP_BASE=
+CONFIG_HEAP_SIZE=