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<h2>
<a name="1207378"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">kernel_start</font>
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<p>
<a name="1207379"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Start preemptive scheduling regime</font>
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<h3>
<a name="1207380"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Synopsis</font>
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<a name="1207381"> </a><font size=2 face=Courier><strong>#include <kernel.h><br></strong></font>
<a name="1271160"> </a><font size=2 face=Courier><strong>int kernel_start( void );<br></strong></font>
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<a name="1207383"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Arguments</font>
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<a name="1207384"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">None</font>
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<a name="1207386"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Results</font>
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<a name="1207387"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Returns <font size=2 face=Courier><strong>0</strong></font> for success, <font size=2 face=Courier><strong>-1</strong></font> if an error occurs.</font>
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<h3>
<a name="1207388"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Errors</font>
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<p>
<a name="1207389"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif">Failure is caused by insufficient space to create the scheduler trap handler.</font>
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<h3>
<a name="1207390"> </a><font color="#003366" face="Verdana, Arial, Helvetica, sans-serif">Description</font>
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<p>
<a name="1207391"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><font size=2 face=Courier><strong>kernel_start()</strong></font> must be called before any tasks are created. It creates and installs the scheduler trap handler and enables the desired scheduler traps. On return from the function the preemptive scheduler is running, and the calling function is installed as the first OS20 task, and is now running at <font size=2 face=Courier><strong>MAX_USER_PRIORITY</strong></font>.</font>
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<p>
<a name="1207396"> </a><font size=2 face="Verdana, Arial, Helvetica, sans-serif"><em>Note: This function may be called automatically if <font size=2 face=Courier><strong>st20cc </strong></font><font face="Verdana, Arial, Helvetica, sans-serif"><b>runtime os20</b></font> is specified when linking; see <a href="getst.htm#1204411"><font color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Chapter⌨️ 快捷键说明
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