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+<th>Arguments</th> +<th>Description</th> +</tr> +</thead> +<tbody> +<tr> +<td><code>ticks</code></td> +<td>Number of cputime ticks to convert to nanoseconds.</td> +</tr> +</tbody> +</table> +<h4 id="returned-values">Returned values</h4> +<p>The number of nanoseconds in <code>ticks</code> number of ticks.</p> +<h4 id="notes">Notes</h4> +<h4 id="example">Example</h4> +<div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%"><span style="color: #A90D91">uint32_t</span> <span style="color: #000000">num_nsecs</span>; +<span style="color: #000000">num_nsecs</span> <span style="color: #000000">=</span> <span style="color: #000000">os_cputime_ticks_to_nsecs</span>(<span style="color: #1C01CE">1000000</span>); +</pre></div> + + <div class="row"> + + + + +<ul class="nav nav-pills" style="margin-bottom: 10px"> + <li> + + <a href=../os_cputime_nsecs_to_ticks/> + <span class="fa fa-arrow-left"></span> + Previous: os_cputime_nsecs_to_ticks + </a> + + </li> + <li 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+<thead> +<tr> +<th>Arguments</th> +<th>Description</th> +</tr> +</thead> +<tbody> +<tr> +<td><code>ticks</code></td> +<td>Number of cputime ticks to convert to microseconds.</td> +</tr> +</tbody> +</table> +<h4 id="returned-values">Returned values</h4> +<p>The number of microseconds in <code>ticks</code> number of ticks.</p> +<h4 id="notes">Notes</h4> +<h4 id="example">Example</h4> +<div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%"><span style="color: #A90D91">uint32_t</span> <span style="color: #000000">num_usecs</span>; +<span style="color: #000000">num_usecs</span> <span style="color: #000000">=</span> <span style="color: #000000">os_cputime_ticks_to_usecs</span>(<span style="color: #1C01CE">1000000</span>); +</pre></div> + + <div class="row"> + + + + +<ul class="nav nav-pills" style="margin-bottom: 10px"> + <li> + + <a href=../os_cputime_ticks_to_nsecs/> + <span class="fa fa-arrow-left"></span> + Previous: os_cputime_ticks_to_nsecs + </a> + + </li> 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href="../os_cputime_delay_nsecs/">Functions</a></li> + + + + <li>» os_cputime_timer_init</li> + + + + </ul> +</div> + </div> + + <h2 id="os_cputime_timer_init"><font color="F2853F" style="font-size:24pt">os_cputime_timer_init</font></h2> +<div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%"><span style="color: #A90D91">void</span> <span style="color: #000000">os_cputime_timer_init</span>(<span style="color: #A90D91">struct</span> <span style="color: #000000">hal_timer</span> <span style="color: #000000">*timer</span>, <span style="color: #000000">hal_timer_cb</span> <span style="color: #000000">fp</span>, <span style="color: #A90D91">void</span> <span style="color: #000000">*arg</span>) +</pre></div> + + +<p>Initializes a cputime timer, indicated by <code>timer</code>, with a pointer to a callback function to call when the timer expires. When an optional opaque argument is specified, it is passed to the timer callback function. </p> +<p>The callback function has the following prototype:</p> +<div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%"><span style="color: #A90D91">void</span> <span style="color: #000000">hal_timer_cb</span>(<span style="color: #A90D91">void</span> <span style="color: #000000">*arg</span>) +</pre></div> + + +<h4 id="arguments">Arguments</h4> +<table> +<thead> +<tr> +<th>Arguments</th> +<th>Description</th> +</tr> +</thead> +<tbody> +<tr> +<td><code>timer</code></td> +<td>Pointer to the hal_timer to initialize. This value cannot be NULL.</td> +</tr> +<tr> +<td><code>fp</code></td> +<td>Pointer to the callback function to call when the timer expires. This value cannot be NULL.</td> +</tr> +<tr> +<td><code>arg</code></td> +<td>Optional opaque argument to pass to the hal timer callback function.</td> +</tr> +</tbody> +</table> +<h4 id="returned-values">Returned values</h4> +<p>N/A</p> +<h4 id="notes">Notes</h4> +<h4 id="example">Example</h4> +<p>Example of ble_ll setting up a response timer:</p> +<div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%"><span style="color: #000000">ble_ll_wfr_timer_exp</span>(<span style="color: #A90D91">void</span> <span style="color: #000000">*arg</span>) +{ + <span style="color: #A90D91">int</span> <span style="color: #000000">rx_start</span>; + <span style="color: #A90D91">uint8_t</span> <span style="color: #000000">lls</span>; + + ... + + <span style="color: #177500">/* If we have started a reception, there is nothing to do here */</span> + <span style="color: #A90D91">if</span> (<span style="color: #000000">!rx_start</span>) { + <span style="color: #A90D91">switch</span> (<span style="color: #000000">lls</span>) { + <span style="color: #A90D91">case</span> <span style="color: #000000">BLE_LL_STATE_ADV</span>: + <span style="color: #000000">ble_ll_adv_wfr_timer_exp</span>(); + <span style="color: #A90D91">break</span>; + + ... + + <span style="color: #177500">/* Do nothing here. Fall through intentional */</span> + <span style="color: #A90D91">case</span> <span style="color: #000000">BLE_LL_STATE_INITIATING</span>: + <span style="color: #A90D91">default</span><span style="color: #000000">:</span> + <span style="color: #A90D91">break</span>; + } + } +} + +<span style="color: #A90D91">void</span> <span style="color: #000000">ble_ll_init</span>(<span style="color: #A90D91">void</span>) +{ + ... + + <span style="color: #000000">os_cputime_timer_init</span>(<span style="color: #000000">&g_ble_ll_data</span>.<span style="color: #000000">ll_wfr_timer</span>, <span style="color: #000000">ble_ll_wfr_timer_exp</span>, <span style="color: #A90D91">NULL</span>); + + ... +} +</pre></div> + + <div class="row"> + + + + +<ul class="nav nav-pills" style="margin-bottom: 10px"> + <li> + + <a href=../os_cputime_ticks_to_usecs/> + <span class="fa fa-arrow-left"></span> + Previous: os_cputime_ticks_to_usecs + </a> + + </li> + <li class="pull-right"> + + <a href=../os_cputime_timer_relative/> + Next: os_cputime_timer_relative + <span class="fa fa-arrow-right"></span> + </a> + + </li> +</ul> + </div> + <footer class="row"> + <div class="col-xs-12"> + + <p class="copyright">Apache Mynewt (incubating) is available under Apache License, version 2.0.</p> + + </div> + <div class="col-xs-12"> + <div class="logos"> + <img src="/img/asf_logo_wide_small.png" alt="Apache" title="Apache"> + <small class="footnote"> + MyNewt is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. 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href="../os_cputime_delay_nsecs/">Functions</a></li> + + + + <li>» os_cputime_timer_relative</li> + + + + </ul> +</div> + </div> + + <h2 id="os_cputime_timer_relative"><font color="F2853F" style="font-size:24pt">os_cputime_timer_relative</font></h2> +<div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%"><span style="color: #A90D91">void</span> <span style="color: #000000">os_cputime_timer_relative</span>(<span style="color: #A90D91">struct</span> <span style="color: #000000">hal_timer</span> <span style="color: #000000">*timer</span>, <span style="color: #A90D91">uint32_t</span> <span style="color: #000000">usecs</span>) +</pre></div> + + +<p>Sets a timer to expire in the specified number of microseconds from the current time. The callback function for the timer is called when the timer expires. </p> +<h4 id="arguments">Arguments</h4> +<table> +<thead> +<tr> +<th>Arguments</th> +<th>Description</th> +</tr> +</thead> +<tbody> +<tr> +<td><code>timer</code></td> +<td>Pointer to an initialized hal_timer.</td> +</tr> +<tr> +<td><code>usecs</code></td> +<td>The number of microseconds to set the timer to expire from now.</td> +</tr> +</tbody> +</table> +<h4 id="returned-values">Returned values</h4> +<p>N/A</p> +<h4 id="notes">Notes</h4> +<p><code>timer</code> must be initialized using the <code>os_cputime_timer_init()</code> function before setting up a timer. </p> +<h4 id="example">Example</h4> +<p>`</p> +<div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%"><span style="color: #A90D91">struct</span> <span style="color: #000000">hal_timer</span> <span style="color: #000000">mytimer</span>; + ... + +<span style="color: #000000">os_cputime_timer_relative</span>(<span style="color: #000000">&mytimer</span>, <span style="color: #1C01CE">100</span>); +</pre></div> + + <div class="row"> + + + + +<ul class="nav nav-pills" style="margin-bottom: 10px"> + <li> + + <a href=../os_cputime_timer_init/> + <span class="fa fa-arrow-left"></span> + Previous: os_cputime_timer_init + </a> + + </li> + <li class="pull-right"> + + <a href=../os_cputime_timer_start/> + Next: os_cputime_timer_start + <span class="fa fa-arrow-right"></span> + </a> + + </li> +</ul> + </div> + <footer class="row"> + <div class="col-xs-12"> + + <p class="copyright">Apache Mynewt (incubating) is available under Apache License, version 2.0.</p> + + </div> + <div class="col-xs-12"> + <div class="logos"> + <img src="/img/asf_logo_wide_small.png" alt="Apache" title="Apache"> + <small class="footnote"> + MyNewt is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. 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