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<div class="title">system_same54.c File Reference</div> </div>
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<p>Low-level initialization functions called upon chip startup.
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<a href="#details">More...</a></p>
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<div class="textblock"><code>#include "<a class="el" href="same54_8h_source.html">same54.h</a>"</code><br />
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Macros</h2></td></tr>
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<tr class="memitem:a16323f44d2b5b11ef3972f71339cbd39"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="system__same54_8c.html#a16323f44d2b5b11ef3972f71339cbd39">__SYSTEM_CLOCK</a>   (48000000)</td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:a93f514700ccf00d08dbdcff7f1224eb2"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="system__same54_8c.html#a93f514700ccf00d08dbdcff7f1224eb2">SystemInit</a> (void)</td></tr>
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<tr class="memdesc:a93f514700ccf00d08dbdcff7f1224eb2"><td class="mdescLeft"> </td><td class="mdescRight">Setup the microcontroller system. Initialize the System and update the SystemCoreClock variable. <a href="system__same54_8c.html#a93f514700ccf00d08dbdcff7f1224eb2">More...</a><br /></td></tr>
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<tr class="separator:a93f514700ccf00d08dbdcff7f1224eb2"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ae0c36a9591fe6e9c45ecb21a794f0f0f"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="system__same54_8c.html#ae0c36a9591fe6e9c45ecb21a794f0f0f">SystemCoreClockUpdate</a> (void)</td></tr>
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<tr class="memdesc:ae0c36a9591fe6e9c45ecb21a794f0f0f"><td class="mdescLeft"> </td><td class="mdescRight">Updates the SystemCoreClock with current core Clock retrieved from cpu registers. <a href="system__same54_8c.html#ae0c36a9591fe6e9c45ecb21a794f0f0f">More...</a><br /></td></tr>
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</table><table class="memberdecls">
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Variables</h2></td></tr>
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<tr class="memitem:aa3cd3e43291e81e795d642b79b6088e6"><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="system__same54_8c.html#aa3cd3e43291e81e795d642b79b6088e6">SystemCoreClock</a> = <a class="el" href="system__same54_8c.html#a16323f44d2b5b11ef3972f71339cbd39">__SYSTEM_CLOCK</a></td></tr>
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<tr class="separator:aa3cd3e43291e81e795d642b79b6088e6"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>Low-level initialization functions called upon chip startup. </p>
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<p>Copyright (c) 2019 Microchip Technology Inc.</p>
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<p>\asf_license_start </p>
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<p class="definition">Definition in file <a class="el" href="system__same54_8c_source.html">system_same54.c</a>.</p>
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</div><h2 class="groupheader">Macro Definition Documentation</h2>
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<a id="a16323f44d2b5b11ef3972f71339cbd39"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a16323f44d2b5b11ef3972f71339cbd39">◆ </a></span>__SYSTEM_CLOCK</h2>
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<td class="memname">#define __SYSTEM_CLOCK   (48000000)</td>
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</div><div class="memdoc">
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<p>Initial system clock frequency. The System RC Oscillator (RCSYS) provides the source for the main clock at chip startup. </p>
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<p class="definition">Definition at line <a class="el" href="system__same54_8c_source.html#l00036">36</a> of file <a class="el" href="system__same54_8c_source.html">system_same54.c</a>.</p>
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<h2 class="groupheader">Function Documentation</h2>
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<a id="ae0c36a9591fe6e9c45ecb21a794f0f0f"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#ae0c36a9591fe6e9c45ecb21a794f0f0f">◆ </a></span>SystemCoreClockUpdate()</h2>
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<td class="memname">void SystemCoreClockUpdate </td>
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<td>(</td>
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<td class="paramtype">void </td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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<p>Updates the SystemCoreClock with current core Clock retrieved from cpu registers. </p>
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<p>Update SystemCoreClock variable </p>
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<p class="definition">Definition at line <a class="el" href="system__same54_8c_source.html#l00059">59</a> of file <a class="el" href="system__same54_8c_source.html">system_same54.c</a>.</p>
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<div class="fragment"><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> {</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">// Not implemented</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <a class="code" href="system__same54_8c.html#aa3cd3e43291e81e795d642b79b6088e6">SystemCoreClock</a> = <a class="code" href="system__same54_8c.html#a16323f44d2b5b11ef3972f71339cbd39">__SYSTEM_CLOCK</a>;</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> }</div>
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<a id="a93f514700ccf00d08dbdcff7f1224eb2"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a93f514700ccf00d08dbdcff7f1224eb2">◆ </a></span>SystemInit()</h2>
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<td class="memname">void SystemInit </td>
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<td>(</td>
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<td class="paramtype">void </td>
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<td class="paramname"></td><td>)</td>
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<td></td>
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</div><div class="memdoc">
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<p>Setup the microcontroller system. Initialize the System and update the SystemCoreClock variable. </p>
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<p>Initialize the system </p>
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<p class="definition">Definition at line <a class="el" href="system__same54_8c_source.html#l00046">46</a> of file <a class="el" href="system__same54_8c_source.html">system_same54.c</a>.</p>
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<div class="fragment"><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> {</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="comment">// Keep the default device state after reset</span></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="system__same54_8c.html#aa3cd3e43291e81e795d642b79b6088e6">SystemCoreClock</a> = <a class="code" href="system__same54_8c.html#a16323f44d2b5b11ef3972f71339cbd39">__SYSTEM_CLOCK</a>;</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">return</span>;</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> }</div>
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</div><!-- fragment -->
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<h2 class="groupheader">Variable Documentation</h2>
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<a id="aa3cd3e43291e81e795d642b79b6088e6"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#aa3cd3e43291e81e795d642b79b6088e6">◆ </a></span>SystemCoreClock</h2>
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<div class="memitem">
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<td class="memname">uint32_t SystemCoreClock = <a class="el" href="system__same54_8c.html#a16323f44d2b5b11ef3972f71339cbd39">__SYSTEM_CLOCK</a></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>System Clock Frequency (Core Clock) </p>
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<p class="definition">Definition at line <a class="el" href="system__same54_8c_source.html#l00038">38</a> of file <a class="el" href="system__same54_8c_source.html">system_same54.c</a>.</p>
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<div class="ttc" id="asystem__same54_8c_html_aa3cd3e43291e81e795d642b79b6088e6"><div class="ttname"><a href="system__same54_8c.html#aa3cd3e43291e81e795d642b79b6088e6">SystemCoreClock</a></div><div class="ttdeci">uint32_t SystemCoreClock</div><div class="ttdef"><b>Definition:</b> <a href="system__same54_8c_source.html#l00038">system_same54.c:38</a></div></div>
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<div class="ttc" id="asystem__same54_8c_html_a16323f44d2b5b11ef3972f71339cbd39"><div class="ttname"><a href="system__same54_8c.html#a16323f44d2b5b11ef3972f71339cbd39">__SYSTEM_CLOCK</a></div><div class="ttdeci">#define __SYSTEM_CLOCK</div><div class="ttdef"><b>Definition:</b> <a href="system__same54_8c_source.html#l00036">system_same54.c:36</a></div></div>
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