NuttxPortingGuide.html

    <code>CONFIG_USBSTRG_NWRREQS</code> and <code>CONFIG_USBSTRG_NRDREQS</code>:
    The number of write/read requests that can be in flight
  </li>
  <li>
    <code>CONFIG_USBSTRG_BULKINREQLEN</code> and <code>CONFIG_USBSTRG_BULKOUTREQLEN</code>:
    The size of the buffer in each write/read request.
    This value needs to be at least as large as the endpoint maxpacket and
    ideally as large as a block device sector.
  </li>
  <li>
    <code>CONFIG_USBSTRG_VENDORID</code> and <code>CONFIG_USBSTRG_VENDORSTR</code>:
    The vendor ID code/string
  </li>
  <li>
    <code>CONFIG_USBSTRG_PRODUCTID</code> and <code>CONFIG_USBSTRG_PRODUCTSTR</code>:
    The product ID code/string
  </li>
  <li>
    <code>CONFIG_USBSTRG_REMOVABLE</code>:
    Select if the media is removable
  </li>
</ul>

<h2>Graphics related configuration settings</h3>
<ul>
  <li>
    <code>CONFIG_NX</code>
    Enables overall support for graphics library and NX
  </li>
</ul>

<h3>NX configuration setting</h3>
<ul>
  <li>
    <code>CONFIG_NX_MULTIUSER</code>:
    Configures NX in multi-user mode.
  </li>
  <li>
    <code>CONFIG_NX_NPLANES</code>:
    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.
  </li>
  <li>
    <code>CONFIG_NX_DISABLE_1BPP</code>, <code>CONFIG_NX_DISABLE_2BPP</code>,
    <code>CONFIG_NX_DISABLE_4BPP</code>, <code>CONFIG_NX_DISABLE_8BPP</code>
    <code>CONFIG_NX_DISABLE_16BPP</code>, <code>CONFIG_NX_DISABLE_24BPP</code>, and
    <code>CONFIG_NX_DISABLE_32BPP</code>:
    NX supports a variety of pixel depths.  You can save some
    memory by disabling support for unused color depths.
  </li>
  <li>
    <code>CONFIG_NX_PACKEDMSFIRST</code>:
    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
  </li>
  <li>
    <code>CONFIG_NX_LCDDRIVER</code>:
    By default, NX builds to use a framebuffer driver (see <code>include/nuttx/fb.h</code>).
    If this option is defined, NX will build to use an LCD driver (see <code>include/nuttx/lcd.h</code>).
  </li>
  <li>
    <code>CONFIG_LCD_MAXPOWER</code>:
    The full-on power setting for an LCD device.
  </li>
  <li>
    <code>CONFIG_LCD_MAXCONTRAST</code>:
    The maximum contrast value for an LCD device.
  </li>
  <li>
    <code>CONFIG_NX_MOUSE</code>:
    Build in support for mouse input.
  </li>
  <li>
    <code>CONFIG_NX_KBD</code>:
    Build in support of keypad/keyboard input.
  </li>
  <li>
    <code>CONFIG_NXTK_BORDERWIDTH</code>:
    Specifies with with of the border (in pixels) used with
    framed windows.   The default is 4.
  </li>
  <li>
    <code>CONFIG_NXTK_BORDERCOLOR1</code> and <code>CONFIG_NXTK_BORDERCOLOR2</code>:
    Specify the colors of the border used with framed windows.
    <code>CONFIG_NXTK_BORDERCOLOR2</code> is the shadow side color and so
    is normally darker.  The default is medium and dark grey,
    respectively
  </li>
  <li>
    <code>CONFIG_NXTK_AUTORAISE</code>:
    If set, a window will be raised to the top if the mouse position
    is over a visible portion of the window.  Default: A mouse
    button must be clicked over a visible portion of the window.
  </li>
  <li>
    <code>CONFIG_NXFONTS_CHARBITS</code>:
    The number of bits in the character set.  Current options are
    only 7 and 8.  The default is 7.
  </li>
  <li>
    <code>CONFIG_NXFONT_SANS</code>:
    At present, there is only one font.  But if there were were more,
    then this option would select the sans serif font.
  </li>
</ul>

<h3>NX Multi-user only options</h3>
<ul>
  <li>
    <code>CONFIG_NX_BLOCKING</code>
    Open the client message queues in blocking mode.  In this case,
    <code>nx_eventhandler()</code>  will not return until a message is received and processed.
  </li>
  <li>
    <code>CONFIG_NX_MXSERVERMSGS</code> and <code>CONFIG_NX_MXCLIENTMSGS</code>
    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 (<code>CONFIG_PREALLOC_MQ_MSGS</code> controls how many
    messages are pre-allocated).
  </li>
</ul>

<h2>Stack and heap information</h2>

<ul>
  <li>
    <code>CONFIG_BOOT_RUNFROMFLASH</code>: Some configurations support XIP
    operation from FLASH but must copy initialized .data sections to RAM.
  </li>
  <li>
    <code>CONFIG_BOOT_COPYTORAM</code>: Some configurations boot in FLASH
    but copy themselves entirely into RAM for better performance.
  </li>
  <li>
    <code>CONFIG_STACK_POINTER</code>: The initial stack pointer
  </li>
  <li>
    <code>CONFIG_IDLETHREAD_STACKSIZE</code>: The size of the initial stack.
    This is the thread that (1) performs the initial 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.
  </li>
  <li>
    <code>CONFIG_USERMAIN_STACKSIZE</code>: The size of the stack to allocate
    for the main user thread that begins at the user_start() entry point.
  </li>
  <li>
    <code>CONFIG_PTHREAD_STACK_MIN</code>: Minimum pthread stack size
  </li>
  <li>
    <code>CONFIG_PTHREAD_STACK_DEFAULT</code>: Default pthread stack size
  </li>
  <li>
    <code>CONFIG_HEAP_BASE</code>: The beginning of the heap
  </li>
  <li>
    <code>CONFIG_HEAP_SIZE</code>: The size of the heap
  </li>
</ul>

<table width ="100%">
  <tr bgcolor="#e4e4e4">
    <td>
      <h1><a name="apndxtrademarks">Appendix B:  Trademarks</a></h1>
    </td>
  </tr>
</table>

  <li>ARM, ARM7 ARM7TDMI, ARM9, ARM920T, ARM926EJS, Cortex-M3 are trademarks of Advanced RISC Machines, Limited.</li>
  <li>Cygwin is a trademark of Red Hat, Incorporated.</li>
  <li>Linux is a registered trademark of Linus Torvalds.</li>
  <li>Eagle-100 is a trademark of <a href=" http://www.micromint.com/">Micromint USA, LLC</a>.
  <li>LPC2148 is a trademark of NXP Semiconductors.</li>
  <li>TI is a trade name of Texas Instruments Incorporated.</li>
  <li>UNIX is a registered trademark of The Open Group.</li>
  <li>VxWorks is a registered trademark of Wind River Systems, Incorporated.</li>
  <li>ZDS, ZNEO, Z16F, Z80, and Zilog are a registered trademark of Zilog, Inc.</li>

<p>
  NOTE: NuttX is <i>not</i> licensed to use the POSIX trademark.  NuttX uses the POSIX
  standard as a development guideline only.
</p>

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