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| <div class="section" id="os-tick"> |
| <h1>OS Tick<a class="headerlink" href="#os-tick" title="Permalink to this headline">¶</a></h1> |
| <p>The hardware independent interface to set up interrupt timers or halt |
| CPU in terms of OS ticks.</p> |
| <div class="section" id="description"> |
| <h2>Description<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2> |
| <p>Set up the periodic timer to interrupt at a frequency of |
| ‘os_ticks_per_sec’ using the following function call where ‘prio’ is |
| the cpu-specific priority of the periodic timer interrupt.</p> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="kt">void</span><span class="w"> </span><span class="nf">os_tick_init</span><span class="p">(</span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">os_ticks_per_sec</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">prio</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>You can halt CPU for up to <code class="docutils literal notranslate"><span class="pre">n</span></code> ticks:</p> |
| <div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="kt">void</span><span class="w"> </span><span class="nf">os_tick_idle</span><span class="p">(</span><span class="n">os_time_t</span><span class="w"> </span><span class="n">n</span><span class="p">);</span> |
| </pre></div> |
| </div> |
| <p>The function implementations are in the mcu-specific directories such as |
| <code class="docutils literal notranslate"><span class="pre">hw/mcu/nordic/nrf51xxx/src/hal_os_tick.c</span></code>.</p> |
| </div> |
| <div class="section" id="api"> |
| <h2>API<a class="headerlink" href="#api" title="Permalink to this headline">¶</a></h2> |
| <dl class="c function"> |
| <dt id="c.os_tick_init"> |
| <span class="target" id="group___h_a_l_os_tick_1ga2f079bb2eceefe6157702c7e0330fa92"></span><span class="pre">void</span> <code class="sig-name descname"><span class="pre">os_tick_init</span></code><span class="sig-paren">(</span><span class="pre">uint32_t</span> <em><span class="pre">os_ticks_per_sec</span></em>, <span class="pre">int</span> <em><span class="pre">prio</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.os_tick_init" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Set up the periodic timer to interrupt at a frequency of ‘os_ticks_per_sec’. </p> |
| <p>‘prio’ is the cpu-specific priority of the periodic timer interrupt.</p> |
| <p><dl class="simple"> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">os_ticks_per_sec</span></code>: Frequency of the OS tick timer </p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">prio</span></code>: Priority of the OS tick timer </p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
| |
| <dl class="c function"> |
| <dt id="c.os_tick_idle"> |
| <span class="target" id="group___h_a_l_os_tick_1ga49888162d566db015bc264007194d506"></span><span class="pre">void</span> <code class="sig-name descname"><span class="pre">os_tick_idle</span></code><span class="sig-paren">(</span><a class="reference internal" href="../../../core_os/time/os_time.html#c.os_time_t" title="os_time_t"><span class="pre">os_time_t</span></a> <em><span class="pre">n</span></em><span class="sig-paren">)</span><a class="headerlink" href="#c.os_tick_idle" title="Permalink to this definition">¶</a><br /></dt> |
| <dd><p>Halt CPU for up to ‘n’ ticks. </p> |
| <p><dl class="simple"> |
| <dt><strong>Parameters</strong></dt><dd><ul class="breatheparameterlist simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">n</span></code>: The number of ticks to halt the CPU for </p></li> |
| </ul> |
| </dd> |
| </dl> |
| </p> |
| </dd></dl> |
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