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| <section id="nordic-nrf53"> |
| <h1>Nordic nRF53<a class="headerlink" href="#nordic-nrf53" title="Permalink to this heading"></a></h1> |
| <p>The nRF53 series of chips from Nordic Semiconductor are based around an two ARM Cortex-M33 cores |
| and a multiprotocol 2.4 GHz transceiver.</p> |
| <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 peripherals supported 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>GPIO</p></td> |
| <td><p>Yes</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>GPIOTE</p></td> |
| <td><p>Yes</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>I2S</p></td> |
| <td><p>No</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>MWU</p></td> |
| <td><p>No</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>NFCT</p></td> |
| <td><p>No</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>PDM</p></td> |
| <td><p>No</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>DPPI</p></td> |
| <td><p>No</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>PWM</p></td> |
| <td><p>Yes</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>QDEC</p></td> |
| <td><p>No</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>QSPI</p></td> |
| <td><p>Yes</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>RADIO</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>RTC</p></td> |
| <td><p>Yes</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>SAADC</p></td> |
| <td><p>Yes</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>SPIM</p></td> |
| <td><p>Yes</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>SPIS</p></td> |
| <td><p>No</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>TEMP</p></td> |
| <td><p>No</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>TIMER</p></td> |
| <td><p>Yes</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>TWIM</p></td> |
| <td><p>Yes</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>TWIS</p></td> |
| <td><p>No</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>UARTE</p></td> |
| <td><p>No</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>USBD</p></td> |
| <td><p>Yes</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>WDT</p></td> |
| <td><p>No</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>IPC</p></td> |
| <td><p>Yes</p></td> |
| <td><p>RPTUN supported</p></td> |
| </tr> |
| </tbody> |
| </table> |
| <section id="gpio-gpiote"> |
| <h3>GPIO/GPIOTE<a class="headerlink" href="#gpio-gpiote" title="Permalink to this heading"></a></h3> |
| <p>Pins can be configured/operated using <code class="docutils literal notranslate"><span class="pre">nrf53_gpio_*</span></code> functions. Interrupts are |
| handled via the GPIOTE peripheral in one of two ways: via a GPIOTE channel or via |
| PORT events. The former allows for simultaneous rising/falling edge-sensitive interrupts |
| per-pin. However, as there are a limited number of channels (and sometimes these |
| are used by some drivers for specific tasks), it may not always be possible to use |
| this mechanism. The latter approach for pin interrupts is via the PORT event, determined |
| by pin state on a their corresponding GPIO port. This is related to the SENSE capability |
| of pins, which can only be set to either rising or falling edge sensing.</p> |
| <p>Depending on <code class="docutils literal notranslate"><span class="pre">CONFIG_NRF53_PER_PIN_INTERRUPTS</span></code> option, you can set a callback for |
| the PORT event itself or you can set a callback for a given pin. In the latter case |
| the driver scans for pins with DETECT bit high and calls the configured callback |
| automatically.</p> |
| <p>Finally, GPIOTE can also be used to configure a channel in <em>task mode</em>, which allows to |
| control pin state via tasks/events.</p> |
| </section> |
| <section id="adc"> |
| <h3>ADC<a class="headerlink" href="#adc" title="Permalink to this heading"></a></h3> |
| <p>The SAADC peripheral is exposed via standard ADC driver. The lower-half of this driver |
| is initialized by calling <code class="xref c c-func docutils literal notranslate"><span class="pre">nrf53_adcinitialize()</span></code>.</p> |
| </section> |
| <section id="i2c"> |
| <h3>I2C<a class="headerlink" href="#i2c" title="Permalink to this heading"></a></h3> |
| <p>I2C is supported both in polling and interrupt mode (via EasyDMA).</p> |
| <div class="admonition note"> |
| <p class="admonition-title">Note</p> |
| <p>The I2C peripheral does not support sending two transfers without sending |
| a START nor RSTART. For this reason, this is supported via an internal buffer where |
| messages will be first copied to and sent together.</p> |
| </div> |
| <p>The lower-half of I2C bus is initialized by <code class="xref c c-func docutils literal notranslate"><span class="pre">nrf53_i2cbus_initialize()</span></code>.</p> |
| </section> |
| <section id="spi"> |
| <h3>SPI<a class="headerlink" href="#spi" title="Permalink to this heading"></a></h3> |
| <p>SPI is supported both in polling and interrupt-based (via EasyDMA) mode. The latter |
| supports arbitrarily long transfers using Nordic’s list-mode EasyDMA (intermediate |
| transfers are currently still manually started).</p> |
| <p>It is possible to use SPI without either MOSI/MISO pin defined by simply not providing |
| the relevant <code class="docutils literal notranslate"><span class="pre">BOARD_SPI*_MISO/MOSI_PIN</span></code> definition.</p> |
| <p>This implementation support power management hooks, which will disable SPI peripheral when |
| entering either SLEEP or STANDBY modes and reconfigure it when going back to NORMAL mode.</p> |
| </section> |
| <section id="uart"> |
| <h3>UART<a class="headerlink" href="#uart" title="Permalink to this heading"></a></h3> |
| <p>UART is implemented using polling. UARTE EasyDMA feature is not yet supported. |
| This may introduce a large number of interrupts which may be undesirable.</p> |
| </section> |
| <section id="pwm"> |
| <h3>PWM<a class="headerlink" href="#pwm" title="Permalink to this heading"></a></h3> |
| <p>PWM is supported via standard driver. This means that more advanced features such as |
| complex sequences or waveform modes are not yet supported.</p> |
| </section> |
| <section id="qspi"> |
| <h3>QSPI<a class="headerlink" href="#qspi" title="Permalink to this heading"></a></h3> |
| <p>QSPI is supported both in interrupt-based (via EasyDMA) mode and is exposed |
| via standard QSPI interface.</p> |
| </section> |
| <section id="timer"> |
| <h3>TIMER<a class="headerlink" href="#timer" title="Permalink to this heading"></a></h3> |
| <p>The TIMER peripheral is exposed as standard timer.</p> |
| </section> |
| <section id="rtc"> |
| <h3>RTC<a class="headerlink" href="#rtc" title="Permalink to this heading"></a></h3> |
| <p>The RTC peripheral is exposed as a standard timer, since it is really a low-power |
| timer, without any date handling capabilities.</p> |
| </section> |
| <section id="usbd"> |
| <h3>USBD<a class="headerlink" href="#usbd" title="Permalink to this heading"></a></h3> |
| <p>The USBD peripheral is exposed via standard USBDEV interface.</p> |
| </section> |
| </section> |
| <section id="interprocessor-communication"> |
| <h2>Interprocessor Communication<a class="headerlink" href="#interprocessor-communication" title="Permalink to this heading"></a></h2> |
| <p>Interprocessor communication between the application core and the network core is realized with |
| the NuttX RPTUN device based on the OpenAMP framework.</p> |
| <p>The last 32kB of the application core RAM is used for a shared memory (address = 0x20078000).</p> |
| </section> |
| <section id="ble-support"> |
| <h2>BLE Support<a class="headerlink" href="#ble-support" title="Permalink to this heading"></a></h2> |
| <p>BLE is supported in the nRF53 using Nordic’s <a class="reference external" href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrfxlib/softdevice_controller/README.html">SoftDevice Controller</a>.</p> |
| </section> |
| <section id="tool-issues"> |
| <h2>Tool Issues<a class="headerlink" href="#tool-issues" title="Permalink to this heading"></a></h2> |
| <section id="openocd"> |
| <h3>OpenOCD<a class="headerlink" href="#openocd" title="Permalink to this heading"></a></h3> |
| <p>There is no official support for Nordic Cortex M33 chips (nRF9160 or nRF5340).</p> |
| </section> |
| <section id="segger-j-link"> |
| <h3>Segger J-Link<a class="headerlink" href="#segger-j-link" title="Permalink to this heading"></a></h3> |
| <p>To start the GDB servers for the application core and the network core, use these commands:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>JLinkGDBServer -device nRF5340_xxAA_APP -autoconnect 1 -if SWD -speed 4000 -port 2331 -swoport 2332 -telnetport 2333 |
| JLinkGDBServer -device nRF5340_xxAA_NET -autoconnect 1 -if SWD -speed 4000 -port 2334 -swoport 2335 -telnetport 2336 |
| </pre></div> |
| </div> |
| <p>Then you can connect GDB to targets:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>(gdb_app) target remote localhost:2331 |
| (gdb_net) target remote localhost:2334 |
| </pre></div> |
| </div> |
| </section> |
| <section id="flashing-locked-device"> |
| <h3>Flashing locked device<a class="headerlink" href="#flashing-locked-device" title="Permalink to this heading"></a></h3> |
| <ol class="arabic"> |
| <li><p>Unlock the network core:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>nrfjprog --recover --coprocessor CP_NETWORK |
| </pre></div> |
| </div> |
| </li> |
| <li><p>Unlock the application core:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>nrfjprog --recover |
| </pre></div> |
| </div> |
| </li> |
| <li><p>Flash the network core:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>nrfjprog --coprocessor CP_NETWORK --program nuttx_net.hex --verify --chiperase |
| </pre></div> |
| </div> |
| </li> |
| <li><p>Flash the application core:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>nrfjprog --program nuttx_app.hex --verify --chiperase |
| </pre></div> |
| </div> |
| </li> |
| </ol> |
| </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/nrf5340-audio-dk/index.html">Nordic nRF5340-Audio-DK</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="boards/nrf5340-dk/index.html">Nordic nRF5340 DK</a></li> |
| <li class="toctree-l1"><a class="reference internal" href="boards/thingy53/index.html">Nordic Thingy:53</a></li> |
| </ul> |
| </div> |
| </section> |
| </section> |
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