https://bhuvanchandradv.github.io/tags/micropython/ Recent content in Micropython on Bhuvan Chandra DV Hugo en Wed, 19 Jul 2017 08:15:33 +0800 https://bhuvanchandradv.github.io/blog/micropython-running-on-vf6xx_m4/ Wed, 19 Jul 2017 08:15:33 +0800 https://bhuvanchandradv.github.io/blog/micropython-running-on-vf6xx_m4/ <p>This is an experimental port of MicroPython for NXP VF6XX M4 Core.</p> <p><a href="https://github.com/bhuvanchandra/micropython/tree/vf6xx_m4">Source code</a></p> <p>Supported features include:</p> <ul> <li>REPL (Python prompt) over UART2</li> <li>Garbage collector</li> <li>GPIO, UART support</li> </ul> <h2 id="build">Build</h2> <p>The toolchain required is the Linaro ARM Embedded toolchain (e.g. 4.9 2015 Q3):</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>tar xjf <span style="color:#e6db74">${</span>HOME<span style="color:#e6db74">}</span>/gcc-arm-none-eabi-4_9-2015q3-20150921-linux.tar.bz2 </span></span><span style="display:flex;"><span>export PATH<span style="color:#f92672">=</span>$PATH:$HOME/gcc-arm-none-eabi-4_9-2015q3/bin/ </span></span></code></pre></div><p>Then build:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>cd <span style="color:#e6db74">${</span>HOME<span style="color:#e6db74">}</span>/micropython/vf6xx </span></span><span style="display:flex;"><span>make </span></span></code></pre></div><h2 id="booting-the-m4-core">Booting the M4 Core</h2> <p>Two methods are supported:</p> <p><strong>1. From U-Boot using <code>bootaux</code>:</strong></p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>Colibri VFxx <span style="color:#75715e"># fatload mmc 0:1 ${loadaddr} firmware.elf</span> </span></span><span style="display:flex;"><span>Colibri VFxx <span style="color:#75715e"># bootaux ${loadaddr}</span> </span></span></code></pre></div><p><strong>2. From Linux using remoteproc:</strong></p>