说明：  基于VxWorks的端口控制实现.pdf ：介绍了嵌入式操作系统VxWorks下端1：2控制的两种实现方法：HOOK函数和MUX接1：2，并对两种实现方法的特点 和性能做了比较。
(Based on VxWorks realize the port control. Pdf: introduction of the VxWorks embedded operating system to control the lower end of the two 1:2 realize method: HOOK function and MUX then 1:2, and two methods to do the characteristics and performance were compared.)