介绍了嵌入式操作系统VxWorks下端控制的两种实现方法：HOOK函数和MUX接口，并对两种实现方法的特点和性能做了比较。
Two kinds ofmethodbased OilVxWorksto realize port contro1．HOOKfuncTIons andMUX interface are discussedinthis paper．The performance and character corrIpaIisoIls ofthe two methods are also detailed．
