This module is common to all of the Example programs It declares the {Open, Read, Write, Close} calls for the USB device These user-calls are translated into OS system calls This module also contains several support routines used by all of

关于USB便携多道系统，PC端客户软件。调用硬件前，须安装好设备驱动程序，使Windows找到USB便携多道设备，否则可以使用其中的软件模拟功能。-on USB portable multi-channel system, the client PC software. Call hardware, it should install a device driver, Windows find USB portable multi-channel equipment, which can use

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