The first parameter fildes is the open file descriptor returned from the function open , referring to a specific device.
第一个参数fildes是函数open返回的文件描述符，用于指称具体设备。
The parameter arg is left to deliver detailed command information needed by the specific device to do its required work.
参数arg 为具体设备的运转提供详细的命令信息。
The specific realization of each function module of the circuit was introduced with detailed analysis of the device type selection and its parameter determination.
介绍了采集电路的各个功能模块具体实现方案，对各器件的选型和参数确定做出详细的分析。
To return only a specific device, set the DIFCF_DEVICEINTERFACE flag and use the Enumerator parameter to supply the device instance ID of the device.
只返回一个特定的设备，设置DIFCF _DEVICEINTERFACE标志和使用枚举器参数来提供设备实例ID的设备。
To return only a specific device, set the DIFCF_DEVICEINTERFACE flag and use the Enumerator parameter to supply the device instance ID of the device.
只返回一个特定的设备，设置DIFCF _DEVICEINTERFACE标志和使用枚举器参数来提供设备实例ID的设备。
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