数据采集卡是典型的字符设备,以其为例,分析了VxWorks 下字符设备驱动程序的结构,说明了字符设备驱动的开发思路,列出了开发的具体步骤,为驱动开发人员提供了参考-Data acquisition card is a typical character device, with its example, the analysis of the character device driver under VxWorks structure, indicating the character device driver development of ideas, lists the specific steps developed for the driver to provide a reference for developers