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<section id="silabs-efm32">
<h1>SiLabs EFM32<a class="headerlink" href="#silabs-efm32" title="Permalink to this heading"></a></h1>
<section id="silabs-efm32-gecko">
<h2>SiLabs EFM32 Gecko<a class="headerlink" href="#silabs-efm32-gecko" title="Permalink to this heading"></a></h2>
<p>This is a port for the Silicon Laboratories’ EFM32
<em>Gecko</em> family. Board support is available for the following:</p>
<ol class="arabic">
<li><p><strong>SiLabs EFM32 Gecko Starter Kit (EFM32-G8XX-STK)</strong>. The Gecko
Starter Kit features:</p>
<ul class="simple">
<li><p>EFM32G890F128 MCU with 128 kB flash and 16 kB RAM</p></li>
<li><p>32.768 kHz crystal (LXFO) and 32 MHz crystal (HXFO)</p></li>
<li><p>Advanced Energy Monitoring</p></li>
<li><p>Touch slider</p></li>
<li><p>4x40 LCD</p></li>
<li><p>4 User LEDs</p></li>
<li><p>2 pushbutton switches</p></li>
<li><p>Reset button and a switch to disconnect the battery.</p></li>
<li><p>On-board SEGGER J-Link USB emulator</p></li>
<li><p>ARM 20 pin JTAG/SWD standard Debug in/out connector</p></li>
</ul>
<p><strong>STATUS</strong>. The basic port is verified and available now. This
includes on-board LED and button support and a serial console
available on LEUART0. A single configuration is available using the
NuttShell NSH and the LEUART0 serial console. DMA and USART-based SPI
supported are included, but not fully tested.</p>
<p>Refer to the EFM32 Gecko Starter Kit
<a class="reference external" href="https://github.com/apache/nuttx/blob/master/boards/arm/efm32/efm32-g8xx-stk/README.txt">README.txt</a>
file for further information.</p>
</li>
<li><p><strong>Olimex EFM32G880F120-STK</strong>. This board features:</p>
<ul class="simple">
<li><p>EFM32G880F128 with 128 kB flash and 16 kB RAM</p></li>
<li><p>32.768 kHz crystal (LXFO) and 32 MHz crystal (HXFO)</p></li>
<li><p>LCD custom display</p></li>
<li><p>DEBUG connector with ARM 2x10 pin layout for programming/debugging
with ARM-JTAG-EW</p></li>
<li><p>UEXT connector</p></li>
<li><p>EXT extension connector</p></li>
<li><p>RS232 connector and driver</p></li>
<li><p>Four user buttons</p></li>
<li><p>Buzzer</p></li>
</ul>
<p><strong>STATUS</strong>. The board support is complete but untested because of
tool-related issues. An OpenOCD compatible, SWD debugger would be
required to make further progress in testing.</p>
<p>Refer to the Olimex EFM32G880F120-STK
<a class="reference external" href="https://github.com/apache/nuttx/blob/master/boards/arm/efm32/olimex-efm32g880f128-stk/README.txt">README.txt</a>
for further information.</p>
</li>
</ol>
</section>
<section id="silabs-efm32-giant-gecko">
<h2>SiLabs EFM32 Giant Gecko<a class="headerlink" href="#silabs-efm32-giant-gecko" title="Permalink to this heading"></a></h2>
<p>This is a port for the Silicon Laboratories’
EFM32 <em>Giant Gecko</em> family. This board features the EFM32GG990F1024 MCU
with 1 MB flash and 128 kB RAM.</p>
<p>Board support is available for the following:</p>
<ul>
<li><p><strong>SiLabs EFM32 Giant Gecko Starter Kit t (EFM32GG-STK3700)</strong>. The
Gecko Starter Kit features:</p>
<ul class="simple">
<li><p>EFM32GG990F1024 MCU with 1 MB flash and 128 kB RAM</p></li>
<li><p>32.768 kHz crystal (LXFO) and 48 MHz crystal (HXFO)</p></li>
<li><p>32 MB NAND flash</p></li>
<li><p>Advanced Energy Monitoring</p></li>
<li><p>Touch slider</p></li>
<li><p>8x20 LCD</p></li>
<li><p>2 user LEDs</p></li>
<li><p>2 user buttons</p></li>
<li><p>USB interface for Host/Device/OTG</p></li>
<li><p>Ambient light sensor and inductive-capacitive metal sensor</p></li>
<li><p>EFM32 OPAMP footprint</p></li>
<li><p>20 pin expansion header</p></li>
<li><p>Breakout pads for easy access to I/O pins</p></li>
<li><p>Power sources (USB and CR2032 battery)</p></li>
<li><p>Backup Capacitor for RTC mode</p></li>
<li><p>Integrated Segger J-Link USB debugger/emulator</p></li>
</ul>
<p><strong>STATUS</strong>.</p>
<ul class="simple">
<li><p>The basic board support for the <em>Giant Gecko</em> was introduced int
the NuttX source tree in NuttX-7.6. A verified configuration was
available for the basic NuttShell (NSH) using LEUART0 for the
serial console.</p></li>
<li><p>Development of USB support is in started, but never completed.</p></li>
<li><p>Reset Management Unit (RMU) was added Pierre-noel Bouteville in
NuttX-7.7.</p></li>
</ul>
</li>
</ul>
<section id="supported-boards">
<h3>Supported Boards<a class="headerlink" href="#supported-boards" title="Permalink to this heading"></a></h3>
<div class="toctree-wrapper compound">
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<li class="toctree-l1"><a class="reference internal" href="boards/olimex-efm32g880f128-stk/index.html">olimex-efm32g880f128-stk</a></li>
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