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| <li class="toctree-l1"><a class="reference internal" href="../introduction/inviolables.html">The Inviolable Principles of NuttX</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="../platforms/index.html">Supported Platforms</a></li> |
| <li class="toctree-l1 current"><a class="current reference internal" href="#">OS Components</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="binfmt.html">Binary Loader</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="drivers/index.html">Device Drivers</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="nxflat.html">NXFLAT</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="nxgraphics/index.html">NX Graphics Subsystem</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="paging.html">On-Demand Paging</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="audio/index.html">Audio Subsystem</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="filesystem/index.html">NuttX File System</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="libs/index.html">NuttX libraries</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="net/index.html">Network Support</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="mm/index.html">Memory Management</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="syscall.html">Syscall Layer</a></li> |
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| <li class="toctree-l2"><a class="reference internal" href="video.html">Video Subsystem</a></li> |
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| |
| <section id="os-components"> |
| <h1>OS Components<a class="headerlink" href="#os-components" title="Permalink to this heading"></a></h1> |
| <p>NuttX is very feature-rich RTOS and is thus composed of various different |
| subsystems. The following sections explain how each of these main RTOS components |
| work and can be used. For detailed documentation on the specific API used in this |
| case, you can head to the <a class="reference internal" href="../reference/index.html"><span class="doc">reference</span></a>.</p> |
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| <p class="caption" role="heading"><span class="caption-text">Contents:</span></p> |
| <ul> |
| <li class="toctree-l1"><a class="reference internal" href="binfmt.html">Binary Loader</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="binfmt.html#binary-loader-interface">Binary Loader Interface</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="binfmt.html#symbol-tables">Symbol Tables</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="binfmt.html#configuration-variables">Configuration Variables</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="drivers/index.html">Device Drivers</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="drivers/character/index.html">Character Device Drivers</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="drivers/block/index.html">Block Device Drivers</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="drivers/special/index.html">Specialized Device Drivers</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="drivers/index.html#lower-half-and-upper-half">Lower-half and upper-half</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="drivers/index.html#subdirectories-of-nuttx-drivers">Subdirectories of <code class="docutils literal notranslate"><span class="pre">nuttx/drivers</span></code></a></li> |
| <li class="toctree-l2"><a class="reference internal" href="drivers/index.html#skeleton-files">Skeleton Files</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="nxflat.html">NXFLAT</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="nxflat.html#overview">Overview</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="nxflat.html#nxflat-toolchain">NXFLAT Toolchain</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="nxflat.html#appendix-a-no-got-operation">Appendix A: No GOT Operation</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="nxflat.html#appendix-b-pic-text-workaround">Appendix B: PIC Text Workaround</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="nxgraphics/index.html">NX Graphics Subsystem</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="nxgraphics/index.html#objectives">Objectives</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="nxgraphics/index.html#organization">Organization</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="nxgraphics/index.html#nx-header-files">NX Header Files</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="paging.html">On-Demand Paging</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="paging.html#kernel-build-implementation">Kernel Build Implementation</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="paging.html#legacy-implementation">Legacy Implementation</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="audio/index.html">Audio Subsystem</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="audio/index.html#files-in-nuttx-audio">Files in nuttx/audio</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="audio/index.html#related-header-files">Related Header Files</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="audio/index.html#configuration-settings">Configuration Settings</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="audio/index.html#related-subdirectories">Related Subdirectories</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="filesystem/index.html">NuttX File System</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="filesystem/index.html#virtual-file-system-vfs">Virtual File System (VFS)</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="filesystem/index.html#file-systems">File systems</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="libs/index.html">NuttX libraries</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="libs/libc/index.html">libc</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="libs/libdsp.html">libdsp</a></li> |
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| <li class="toctree-l2"><a class="reference internal" href="libs/libxx.html">libxx</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="libs/libnx/index.html">libnx</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="net/index.html">Network Support</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="net/sixlowpan.html">6LoWPAN</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="net/socketcan.html">SocketCAN Device Drivers</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="net/pkt.html">“Raw” packet socket support</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="net/nat.html">Network Address Translation (NAT)</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="net/netdev.html">Network Devices</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="net/netguardsize.html">CONFIG_NET_GUARDSIZE</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="net/slip.html">SLIP</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="net/wqueuedeadlocks.html">Work Queue Deadlocks</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="mm/index.html">Memory Management</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="mm/shm.html">Shared Memory Support</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="mm/index.html#standard-memory-management-functions">Standard Memory Management Functions</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="mm/index.html#granule-allocator">Granule Allocator</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="mm/index.html#page-allocator">Page Allocator</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="mm/index.html#shared-memory-management">Shared Memory Management</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="mm/index.html#i-o-buffers">I/O Buffers</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="syscall.html">Syscall Layer</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="syscall.html#header-files">Header Files</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="syscall.html#variadic-functions">Variadic Functions</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="syscall.html#auto-generated-files">Auto-Generated Files</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="syscall.html#sub-directories">Sub-Directories</a></li> |
| <li class="toctree-l2"><a class="reference internal" href="syscall.html#mksyscall">mksyscall</a></li> |
| </ul> |
| </li> |
| <li class="toctree-l1"><a class="reference internal" href="tools/index.html"><code class="docutils literal notranslate"><span class="pre">/tools</span></code> Host Tools</a><ul> |
| <li class="toctree-l2"><a class="reference internal" href="tools/index.html#cmpconfig-c">cmpconfig.c</a></li> |
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