mult_ts7.htm

来自「ST20 Embedded Toolset R2.0.5用于开发基于ST20芯片」· HTM 代码 · 共 54 行

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<h2>
  <a name="1102441"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">7.6 	 Starting a new task</font>
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<p>
  <a name="1102442"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">When a process restarts after an interrupt or trap, the entire state is loaded from the saved state. However, when the process starts or restarts after being descheduled, the CPU makes assumptions about the state of the process, since not all the state was saved. </font>
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<p>
  <a name="1102445"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif"><span class=Signal>Wptr</span> and <span class=Signal>Iptr</span> are set to the values saved in <span class=Signal>pw.Wptr</span> and <span class=Signal>pw.Iptr</span> of the process descriptor block. The <span class=Signal>status</span> register is set to the values shown in <a href="mult_ts7.htm#1102527"><font  color="#0000ff" face="Verdana, Arial, Helvetica, sans-serif"><i>Table

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