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   <section id="espressif-esp32-s3">
 <h1>Espressif ESP32-S3<a class="headerlink" href="#espressif-esp32-s3" title="Permalink to this heading"></a></h1>
 <p>The ESP32-S3 is a series of single and dual-core SoCs from Espressif
 based on Harvard architecture Xtensa LX7 CPUs and with on-chip support
 for Bluetooth and Wi-Fi.</p>
 <p>All embedded memory, external memory and peripherals are located on the
 data bus and/or the instruction bus of these CPUs. With some minor
 exceptions, the address mapping of two CPUs is symmetric, meaning they
 use the same addresses to access the same memory. Multiple peripherals in
 the system can access embedded memory via DMA.</p>
 <p>On dual-core SoCs, the two CPUs are typically named “PRO_CPU” and “APP_CPU”
 (for “protocol” and “application”), however for most purposes the
 two CPUs are interchangeable.</p>
 <section id="toolchain">
 <h2>Toolchain<a class="headerlink" href="#toolchain" title="Permalink to this heading"></a></h2>
 <p>You can use the prebuilt <a class="reference external" href="https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-guides/tools/idf-tools.html#xtensa-esp32s3-elf">toolchain</a>
 for Xtensa architecture and <a class="reference external" href="https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-guides/tools/idf-tools.html#openocd-esp32">OpenOCD</a>
 for ESP32-S3 by Espressif.</p>
 <p>For flashing firmware, you will need to install <code class="docutils literal notranslate"><span class="pre">esptool.py</span></code> by running:</p>
 <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>$ pip install esptool
 </pre></div>
 </div>
 <section id="building-from-source">
 <h3>Building from source<a class="headerlink" href="#building-from-source" title="Permalink to this heading"></a></h3>
 <p>You can also build the toolchain yourself. The steps to
 build the toolchain with crosstool-NG on Linux are as follows</p>
 <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>git<span class="w"> </span>clone<span class="w"> </span>https://github.com/espressif/crosstool-NG.git
 <span class="gp">$ </span><span class="nb">cd</span><span class="w"> </span>crosstool-NG
 <span class="gp">$ </span>git<span class="w"> </span>submodule<span class="w"> </span>update<span class="w"> </span>--init

 <span class="gp">$ </span>./bootstrap<span class="w"> </span><span class="o">&amp;&amp;</span><span class="w"> </span>./configure<span class="w"> </span>--enable-local<span class="w"> </span><span class="o">&amp;&amp;</span><span class="w"> </span>make

 <span class="gp">$ </span>./ct-ng<span class="w"> </span>xtensa-esp32s3-elf
 <span class="gp">$ </span>./ct-ng<span class="w"> </span>build

 <span class="gp">$ </span>chmod<span class="w"> </span>-R<span class="w"> </span>u+w<span class="w"> </span>builds/xtensa-esp32s3-elf

 <span class="gp">$ </span><span class="nb">export</span><span class="w"> </span><span class="nv">PATH</span><span class="o">=</span><span class="s2">&quot;crosstool-NG/builds/xtensa-esp32-elf/bin:</span><span class="nv">$PATH</span><span class="s2">&quot;</span>
 </pre></div>
 </div>
 <p>These steps are given in the setup guide in
 <a class="reference external" href="https://docs.espressif.com/projects/esp-idf/en/latest/get-started/linux-setup-scratch.html">ESP-IDF documentation</a>.</p>
 </section>
 </section>
 <section id="flashing">
 <h2>Flashing<a class="headerlink" href="#flashing" title="Permalink to this heading"></a></h2>
 <p>Firmware for ESP32-S3 is flashed via the USB/UART or internal USB DEVICE JTAG interface using the
 <code class="docutils literal notranslate"><span class="pre">esptool.py</span></code> tool.
 It’s a two step process where the first converts the ELF file into a ESP32-S3 compatible binary
 and the second flashes it to the board.  These steps are included into the build system and you can
 flash your NuttX firmware simply by running:</p>
 <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>$ make flash ESPTOOL_PORT=&lt;port&gt;
 </pre></div>
 </div>
 <p>where <code class="docutils literal notranslate"><span class="pre">&lt;port&gt;</span></code> is typically <code class="docutils literal notranslate"><span class="pre">/dev/ttyUSB0</span></code> or similar. You can change the baudrate by passing <code class="docutils literal notranslate"><span class="pre">ESPTOOL_BAUD</span></code>.</p>
 <section id="bootloader-and-partitions">
 <h3>Bootloader and partitions<a class="headerlink" href="#bootloader-and-partitions" title="Permalink to this heading"></a></h3>
 <p>ESP32-S3 requires a bootloader to be flashed as well as a set of FLASH partitions. This is only needed the first time
 (or any time you which to modify either of these). An easy way is to use prebuilt binaries for NuttX <a class="reference external" href="https://github.com/espressif/esp-nuttx-bootloader">from here</a>. In there you will find instructions to rebuild these if necessary.
 Once you downloaded both binaries, you can flash them by adding an <code class="docutils literal notranslate"><span class="pre">ESPTOOL_BINDIR</span></code> parameter, pointing to the directory where these binaries were downloaded:</p>
 <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>make<span class="w"> </span>flash<span class="w"> </span><span class="nv">ESPTOOL_PORT</span><span class="o">=</span>&lt;port&gt;<span class="w"> </span><span class="nv">ESPTOOL_BINDIR</span><span class="o">=</span>&lt;dir&gt;
 </pre></div>
 </div>
 <div class="admonition note">
 <p class="admonition-title">Note</p>
 <p>It is recommended that if this is the first time you are using the board with NuttX that you perform a complete SPI FLASH erase.</p>
 <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>esptool.py<span class="w"> </span>erase_flash
 </pre></div>
 </div>
 </div>
 </section>
 </section>
 <section id="peripheral-support">
 <h2>Peripheral Support<a class="headerlink" href="#peripheral-support" title="Permalink to this heading"></a></h2>
 <p>The following list indicates the state of peripherals’ support in NuttX:</p>
 <table class="docutils align-default">
 <thead>
 <tr class="row-odd"><th class="head"><p>Peripheral</p></th>
 <th class="head"><p>Support</p></th>
 <th class="head"><p>NOTES</p></th>
 </tr>
 </thead>
 <tbody>
 <tr class="row-even"><td><p>ADC</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>AES</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>Bluetooth</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>CAMERA</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>CAN/TWAI</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>DMA</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>eFuse</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>GPIO</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>I2C</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>I2S</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>LCD</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>LED_PWM</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>MCPWM</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>Pulse_CNT</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>RMT</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>RNG</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>RSA</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>RTC</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>SD/MMC</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>SDIO</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>SHA</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>SPI</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>SPIFLASH</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>SPIRAM</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>Timers</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>Touch</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>UART</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>USB OTG</p></td>
 <td><p>No</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>USB SERIAL</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-odd"><td><p>Watchdog</p></td>
 <td><p>Yes</p></td>
 <td></td>
 </tr>
 <tr class="row-even"><td><p>Wi-Fi</p></td>
 <td><p>Yes</p></td>
 <td><p>WPA3-SAE supported</p></td>
 </tr>
 </tbody>
 </table>
 <section id="wi-fi">
 <span id="esp32s3-peripheral-support"></span><h3>Wi-Fi<a class="headerlink" href="#wi-fi" title="Permalink to this heading"></a></h3>
 <div class="admonition tip">
 <p class="admonition-title">Tip</p>
 <p>Boards usually expose a <code class="docutils literal notranslate"><span class="pre">wifi</span></code> defconfig which enables Wi-Fi. On ESP32-S3,
 SMP is enabled to enhance Wi-Fi performance.</p>
 </div>
 <p>A standard network interface will be configured and can be initialized such as:</p>
 <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>nsh&gt; ifup wlan0
 nsh&gt; wapi psk wlan0 mypasswd 3
 nsh&gt; wapi essid wlan0 myssid 1
 nsh&gt; renew wlan0
 </pre></div>
 </div>
 <p>In this case a connection to AP with SSID <code class="docutils literal notranslate"><span class="pre">myssid</span></code> is done, using <code class="docutils literal notranslate"><span class="pre">mypasswd</span></code> as
 password. IP address is obtained via DHCP using <code class="docutils literal notranslate"><span class="pre">renew</span></code> command. You can check
 the result by running <code class="docutils literal notranslate"><span class="pre">ifconfig</span></code> afterwards.</p>
 <div class="admonition tip">
 <p class="admonition-title">Tip</p>
 <p>Please refer to <a class="reference internal" href="../esp32/index.html#esp32-wi-fi-sta"><span class="std std-ref">ESP32 Wi-Fi Station Mode</span></a>
 for more information.</p>
 </div>
 </section>
 <section id="wi-fi-softap">
 <h3>Wi-Fi SoftAP<a class="headerlink" href="#wi-fi-softap" title="Permalink to this heading"></a></h3>
 <p>It is possible to use ESP32-S3 as an Access Point (SoftAP).</p>
 <div class="admonition tip">
 <p class="admonition-title">Tip</p>
 <p>Boards usually expose a <code class="docutils literal notranslate"><span class="pre">sta_softap</span></code> defconfig which enables Wi-Fi
 (STA + SoftAP). On ESP32-S3, SMP is enabled to enhance Wi-Fi performance.</p>
 </div>
 <p>If you are using this board config profile you can run these commands to be able
 to connect your smartphone or laptop to your board:</p>
 <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>nsh&gt; ifup wlan1
 nsh&gt; dhcpd_start wlan1
 nsh&gt; wapi psk wlan1 mypasswd 3
 nsh&gt; wapi essid wlan1 nuttxap 1
 </pre></div>
 </div>
 <p>In this case, you are creating the access point <code class="docutils literal notranslate"><span class="pre">nuttxapp</span></code> in your board and to
 connect to it on your smartphone you will be required to type the password <code class="docutils literal notranslate"><span class="pre">mypasswd</span></code>
 using WPA2.</p>
 <div class="admonition tip">
 <p class="admonition-title">Tip</p>
 <p>Please refer to <a class="reference internal" href="../esp32/index.html#esp32-wi-fi-softap"><span class="std std-ref">ESP32 Wi-Fi SoftAP Mode</span></a>
 for more information.</p>
 </div>
 <p>The <code class="docutils literal notranslate"><span class="pre">dhcpd_start</span></code> is necessary to let your board to associate an IP to your smartphone.</p>
 </section>
 </section>
 <section id="memory-map">
 <h2>Memory Map<a class="headerlink" href="#memory-map" title="Permalink to this heading"></a></h2>
 <section id="address-mapping">
 <h3>Address Mapping<a class="headerlink" href="#address-mapping" title="Permalink to this heading"></a></h3>
 <table class="docutils align-default">
 <thead>
 <tr class="row-odd"><th class="head"><p>BUS TYPE</p></th>
 <th class="head"><p>START</p></th>
 <th class="head"><p>LAST</p></th>
 <th class="head"><p>DESCRIPTION</p></th>
 <th class="head"><p>NOTES</p></th>
 </tr>
 </thead>
 <tbody>
 <tr class="row-even"><td><p>To be added</p></td>
 <td></td>
 <td></td>
 <td></td>
 <td></td>
 </tr>
 </tbody>
 </table>
 </section>
 <section id="embedded-memory">
 <h3>Embedded Memory<a class="headerlink" href="#embedded-memory" title="Permalink to this heading"></a></h3>
 <table class="docutils align-default">
 <thead>
 <tr class="row-odd"><th class="head"><p>BUS TYPE</p></th>
 <th class="head"><p>START</p></th>
 <th class="head"><p>LAST</p></th>
 <th class="head"><p>DESCRIPTION</p></th>
 <th class="head"><p>NOTES</p></th>
 </tr>
 </thead>
 <tbody>
 <tr class="row-even"><td><p>To be added</p></td>
 <td></td>
 <td></td>
 <td></td>
 <td></td>
 </tr>
 </tbody>
 </table>
 </section>
 <section id="boundary-address-embedded">
 <h3>Boundary Address (Embedded)<a class="headerlink" href="#boundary-address-embedded" title="Permalink to this heading"></a></h3>
 <table class="docutils align-default">
 <thead>
 <tr class="row-odd"><th class="head"><p>BUS TYPE</p></th>
 <th class="head"><p>START</p></th>
 <th class="head"><p>LAST</p></th>
 <th class="head"><p>DESCRIPTION</p></th>
 <th class="head"><p>NOTES</p></th>
 </tr>
 </thead>
 <tbody>
 <tr class="row-even"><td><p>To be added</p></td>
 <td></td>
 <td></td>
 <td></td>
 <td></td>
 </tr>
 </tbody>
 </table>
 </section>
 <section id="external-memory">
 <h3>External Memory<a class="headerlink" href="#external-memory" title="Permalink to this heading"></a></h3>
 <table class="docutils align-default">
 <thead>
 <tr class="row-odd"><th class="head"><p>BUS TYPE</p></th>
 <th class="head"><p>START</p></th>
 <th class="head"><p>LAST</p></th>
 <th class="head"><p>DESCRIPTION</p></th>
 <th class="head"><p>NOTES</p></th>
 </tr>
 </thead>
 <tbody>
 <tr class="row-even"><td><p>To be added</p></td>
 <td></td>
 <td></td>
 <td></td>
 <td></td>
 </tr>
 </tbody>
 </table>
 </section>
 <section id="boundary-address-external">
 <h3>Boundary Address (External)<a class="headerlink" href="#boundary-address-external" title="Permalink to this heading"></a></h3>
 <p>To be added</p>
 </section>
 <section id="linker-segments">
 <h3>Linker Segments<a class="headerlink" href="#linker-segments" title="Permalink to this heading"></a></h3>
 <table class="docutils align-default">
 <thead>
 <tr class="row-odd"><th class="head"><p>DESCRIPTION</p></th>
 <th class="head"><p>START</p></th>
 <th class="head"><p>END</p></th>
 <th class="head"><p>ATTR</p></th>
 <th class="head"><p>LINKER SEGMENT NAME</p></th>
 </tr>
 </thead>
 <tbody>
 <tr class="row-even"><td><p>To be added</p></td>
 <td></td>
 <td></td>
 <td></td>
 <td></td>
 </tr>
 </tbody>
 </table>
 </section>
 </section>
 <section id="supported-boards">
 <h2>Supported Boards<a class="headerlink" href="#supported-boards" title="Permalink to this heading"></a></h2>
 <div class="toctree-wrapper compound">
 <ul>
 <li class="toctree-l1"><a class="reference internal" href="boards/esp32s3-devkit/index.html">ESP32S3-DevKit</a></li>
 <li class="toctree-l1"><a class="reference internal" href="boards/esp32s3-eye/index.html">ESP32-S3-EYE</a></li>
 </ul>
 </div>
 </section>
 </section>


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