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<a href="../index.html" class="icon icon-home"> openFPGALoader: universal utility for programming FPGA
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<li class="toctree-l1"><a class="reference internal" href="anlogic.html">Anlogic notes</a></li>
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<li class="toctree-l1"><a class="reference internal" href="colognechip.html">Cologne Chip notes</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#gowin-gw1n">GOWIN GW1N</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="#flash-sram">Flash SRAM</a></li>
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<li class="toctree-l3"><a class="reference internal" href="#flash">Flash</a></li>
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<li class="toctree-l3"><a class="reference internal" href="#user-flash">User Flash</a></li>
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<a href="https://github.com/trabucayre/openFPGALoader/blob/master/doc/vendors/gowin.rst" class="fa fa-github"> Edit on GitHub</a>
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<section id="gowin-notes">
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<span id="gowin"></span><h1>Gowin notes<a class="headerlink" href="#gowin-notes" title="Link to this heading">¶</a></h1>
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<section id="gowin-gw1n">
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<h2>GOWIN GW1N<a class="headerlink" href="#gowin-gw1n" title="Link to this heading">¶</a></h2>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<ul class="simple">
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<li><p>Trenz TEC0117</p></li>
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<li><p>Sipeed Tang Nano</p></li>
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<li><p>Sipeed Tang Nano 4K</p></li>
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<li><p>Honeycomb</p></li>
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<li><p>RUNBER</p></li>
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</ul>
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</div>
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<p><code class="docutils literal notranslate"><span class="pre">.fs</span></code> file is the default format generated by <em>Gowin IDE</em>, so nothing special must be done to generates this file.</p>
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<p>Since the same file is used for SRAM and Flash a CLI argument is used to specify the destination.</p>
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<section id="flash-sram">
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<h3>Flash SRAM<a class="headerlink" href="#flash-sram" title="Link to this heading">¶</a></h3>
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<p>with <code class="docutils literal notranslate"><span class="pre">-m</span></code>:</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>openFPGALoader<span class="w"> </span>-m<span class="w"> </span>-b<span class="w"> </span>BOARD_NAME<span class="w"> </span>impl/pnr/*.fs
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</pre></div>
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</div>
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<p>where <code class="docutils literal notranslate"><span class="pre">BOARD_NAME</span></code> is:</p>
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<ul class="simple">
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<li><p><code class="docutils literal notranslate"><span class="pre">tec0117</span></code></p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">tangnano</span></code></p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">tangnano1k</span></code></p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">tangnano4k</span></code></p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">tangnano9k</span></code></p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">tangnano20k</span></code></p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">tangprimer20k</span></code></p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">runber</span></code></p></li>
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</ul>
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</section>
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<section id="flash">
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<h3>Flash<a class="headerlink" href="#flash" title="Link to this heading">¶</a></h3>
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<div class="admonition attention">
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<p class="admonition-title">Attention</p>
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<p>Only with Trenz TEC0117 and runber.</p>
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</div>
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<p>with <code class="docutils literal notranslate"><span class="pre">-f</span></code>, file load:</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>openFPGALoader<span class="w"> </span>-f<span class="w"> </span>-b<span class="w"> </span>BOARD_NAME<span class="w"> </span>impl/pnr/*.fs
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</pre></div>
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</div>
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<p>where <code class="docutils literal notranslate"><span class="pre">BOARD_NAME</span></code> is:</p>
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<ul class="simple">
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<li><p><code class="docutils literal notranslate"><span class="pre">tec0117</span></code></p></li>
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<li><p><code class="docutils literal notranslate"><span class="pre">runber</span></code></p></li>
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</ul>
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<p>It’s possible to flash external SPI Flash (connected to MSPI) in bscan mode by using <code class="docutils literal notranslate"><span class="pre">--external-flash</span></code> instead of
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<code class="docutils literal notranslate"><span class="pre">-f</span></code>.</p>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>Gowin’s FPGA may fails to be detected if <strong>JTAGSEL_N</strong> (pin 08 for <em>GW1N-4K</em>) is used as a GPIO.
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To recover you have to pull down this pin (before power up) to recover JTAG interface (<em>UG292 - JTAGSELL_N section</em>).</p>
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</div>
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</section>
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<section id="user-flash">
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<h3>User Flash<a class="headerlink" href="#user-flash" title="Link to this heading">¶</a></h3>
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<div class="admonition attention">
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<p class="admonition-title">Attention</p>
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<p>User Flash support is based on reverse engineering of the JTAG protocol. This functionality should be considered
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experimental as it hasn’t been thoroughly tested, and may in some circumstances destroy your device.</p>
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</div>
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<p>Gowin FPGA come with extra flash space that can be read and written from the programmable logic (“User Flash”). This
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flash section can also be programmed via the JTAG interface:</p>
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<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>openFPGALoader<span class="w"> </span>--write-flash<span class="w"> </span>/path/to/bitstream.fs<span class="w"> </span>--user-flash<span class="w"> </span>/path/to/flash.bin
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</pre></div>
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</div>
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</section>
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