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<div id="projectname">BLE5.2<span id="projectnumber"> 1.0</span>
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<li class="navelem"><a class="el" href="dir_e551eb05443008c96ab2f08dbb3250a6.html">TEST2</a></li><li class="navelem"><a class="el" href="dir_a213a656435eb838f44f965c240ae24d.html">api</a></li> </ul>
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<div class="headertitle"><div class="title">xc_drv_systick.c</div></div>
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<a href="xc__drv__systick_8c.html">浏览该文件的文档.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span> </div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="comment">/*-----------------------------------------------------------------------------------</span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="comment"> INCLUDE HEADE FILES</span></div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="comment"> ------------------------------------------------------------------------------------*/</span></div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="preprocessor">#include "<a class="code" href="xc__drv__systick_8h.html">xc_drv_systick.h</a>"</span></div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="preprocessor">#include "<a class="code" href="xc__drv__clock_8h.html">xc_drv_clock.h</a>"</span></div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> </div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="comment">/*------------------------------------------------------------------------------------</span></div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="comment"> Functions</span></div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="comment"> -------------------------------------------------------------------------------------*/</span></div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"><a class="line" href="xc__drv__systick_8c.html#ab5e09814056d617c521549e542639b7e"> 35</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="xc__drv__systick_8c.html#ab5e09814056d617c521549e542639b7e">SysTick_Handler</a>(<span class="keywordtype">void</span>) { <a class="code hl_function" href="xc__drv__systick_8c.html#a0e8c08ba5012baefdceb1980cfe81bdd">systick_callback</a>(); }</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> </div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"><a class="line" href="xc__drv__systick_8c.html#ae203207a3723adacb57c77245c351f90"> 37</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="xc__drv__systick_8c.html#ae203207a3723adacb57c77245c351f90">delay_us</a>(uint32_t nus)</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span>{</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="keywordflow">if</span> (nus == 0)</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keywordflow">return</span>;</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> uint32_t unit = <a class="code hl_function" href="xc__drv__clock_8c.html#ad22287da69543b4e38dd75ecec8cf94a">xc_systick_unit_get</a>();</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> </div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> uint32_t temp;</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> SysTick->CTRL = 0x00; <span class="comment">// 关闭计数器</span></div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> SysTick->LOAD = unit * nus - unit + 1;</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> </div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> SysTick->VAL = 0;</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> SysTick->CTRL = 0x05;</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> </div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keywordflow">do</span> {</div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> temp = SysTick->CTRL; <span class="comment">// 读取当前倒计数值</span></div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> } <span class="keywordflow">while</span> ((temp & 0x01) && (!(temp & (1 << 16))));</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span>}</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> </div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"><a class="line" href="xc__drv__systick_8c.html#a78922e7473c4713fc6ec4547fd2efc67"> 57</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="xc__drv__systick_8c.html#a78922e7473c4713fc6ec4547fd2efc67">delay_ms</a>(uint32_t nms)</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span>{</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keywordflow">if</span> (nms == 0) {</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">return</span>;</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> }</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> </div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <span class="keywordflow">do</span> {</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <a class="code hl_function" href="xc__drv__systick_8c.html#ae203207a3723adacb57c77245c351f90">delay_us</a>(1000);</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> } <span class="keywordflow">while</span> (--nms);</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span>}</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> </div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"><a class="line" href="xc__drv__systick_8c.html#a0e8c08ba5012baefdceb1980cfe81bdd"> 68</a></span>__WEAK <span class="keywordtype">void</span> <a class="code hl_function" href="xc__drv__systick_8c.html#a0e8c08ba5012baefdceb1980cfe81bdd">systick_callback</a>(<span class="keywordtype">void</span>) {}</div>
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<div class="ttc" id="axc__drv__clock_8c_html_ad22287da69543b4e38dd75ecec8cf94a"><div class="ttname"><a href="xc__drv__clock_8c.html#ad22287da69543b4e38dd75ecec8cf94a">xc_systick_unit_get</a></div><div class="ttdeci">Systick_Unit_Typedef xc_systick_unit_get(void)</div><div class="ttdoc">xc_systick_unit_get</div><div class="ttdef"><b>Definition</b> <a href="xc__drv__clock_8c_source.html#l00518">xc_drv_clock.c:518</a></div></div>
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<div class="ttc" id="axc__drv__clock_8h_html"><div class="ttname"><a href="xc__drv__clock_8h.html">xc_drv_clock.h</a></div><div class="ttdoc">The header of xc_drv_clock.c</div></div>
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<div class="ttc" id="axc__drv__systick_8c_html_a0e8c08ba5012baefdceb1980cfe81bdd"><div class="ttname"><a href="xc__drv__systick_8c.html#a0e8c08ba5012baefdceb1980cfe81bdd">systick_callback</a></div><div class="ttdeci">__WEAK void systick_callback(void)</div><div class="ttdef"><b>Definition</b> <a href="xc__drv__systick_8c_source.html#l00068">xc_drv_systick.c:68</a></div></div>
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<div class="ttc" id="axc__drv__systick_8c_html_a78922e7473c4713fc6ec4547fd2efc67"><div class="ttname"><a href="xc__drv__systick_8c.html#a78922e7473c4713fc6ec4547fd2efc67">delay_ms</a></div><div class="ttdeci">void delay_ms(uint32_t nms)</div><div class="ttdef"><b>Definition</b> <a href="xc__drv__systick_8c_source.html#l00057">xc_drv_systick.c:57</a></div></div>
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<div class="ttc" id="axc__drv__systick_8c_html_ab5e09814056d617c521549e542639b7e"><div class="ttname"><a href="xc__drv__systick_8c.html#ab5e09814056d617c521549e542639b7e">SysTick_Handler</a></div><div class="ttdeci">void SysTick_Handler(void)</div><div class="ttdef"><b>Definition</b> <a href="xc__drv__systick_8c_source.html#l00035">xc_drv_systick.c:35</a></div></div>
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<div class="ttc" id="axc__drv__systick_8c_html_ae203207a3723adacb57c77245c351f90"><div class="ttname"><a href="xc__drv__systick_8c.html#ae203207a3723adacb57c77245c351f90">delay_us</a></div><div class="ttdeci">void delay_us(uint32_t nus)</div><div class="ttdef"><b>Definition</b> <a href="xc__drv__systick_8c_source.html#l00037">xc_drv_systick.c:37</a></div></div>
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<div class="ttc" id="axc__drv__systick_8h_html"><div class="ttname"><a href="xc__drv__systick_8h.html">xc_drv_systick.h</a></div><div class="ttdoc">The header of xc_drv_systick.c</div></div>
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