div class="line"><span class="preprocessor">#define SysTick_CTRL_COUNTFLAG_Msk    (1ul &amp;lt;&amp;lt; SysTick_CTRL_COUNTFLAG_Pos)      </span></div>
<div class="line"><span class="preprocessor">#define SysTick_CTRL_CLKSOURCE_Pos      2                                      </span></div>
<div class="line"><span class="preprocessor">#define SysTick_CTRL_CLKSOURCE_Msk     (1ul &amp;lt;&amp;lt; SysTick_CTRL_CLKSOURCE_Pos)     </span></div>
<div class="line"><span class="preprocessor">#define SysTick_CTRL_TICKI