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 dev