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| <h1>Mynewt FAQ - Porting Mynewt<a class="headerlink" href="#mynewt-faq-porting-mynewt" title="Permalink to this headline">¶</a></h1> |
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| <li><p><a class="reference internal" href="#porting-mynewt-to-core-m3-mcu" id="id1">Porting Mynewt to Core-M3 MCU</a></p></li> |
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| <h2><a class="toc-backref" href="#id1">Porting Mynewt to Core-M3 MCU</a><a class="headerlink" href="#porting-mynewt-to-core-m3-mcu" title="Permalink to this headline">¶</a></h2> |
| <p><strong>Q</strong>: I have a weird OS tick issue with a Core-M3 MCU port. The tick rate is set up identically to most ARM MCUs by |
| setting up a hardware interrupt to trigger SysClock / <code class="docutils literal notranslate"><span class="pre">os_tick_per_sec</span></code>. SysClock is correct and <code class="docutils literal notranslate"><span class="pre">os_tick_per_sec</span></code> |
| is set to 1000, but the tick rate seems to be significantly higher. What am I doing wrong?</p> |
| <p><strong>A</strong>: Check whether the LED is actually staying on or it is flickering really fast by debugging through the loop. If |
| it is staying on, you may be getting into an <code class="docutils literal notranslate"><span class="pre">assert()</span></code>. Otherwise, it is due to the fact that the OS timer wasn’t |
| created, which is done by <code class="docutils literal notranslate"><span class="pre">hal_bsp.c</span></code>. The OS timer needs a hardware timer to be running, so you will need to call |
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