The device Abstract Layer provides a set of standard communication interface functions unrelated with specific device, which is mapped to device drivers by file table, device table and driver table.
设备抽象层为上层应用程序提供了一套标准的、与设备无关的通信接口，并且通过文件描述表、设备描述表和驱动描述表建立了从通信接口到设备驱动的映射。
The driver codes are written according to the standard USB device Class Specification for DFU, therefore the driver itself can be universally applied to all the DFU devices.
因为驱动是根据标准的DFU类规范要求所写，因而对任何DF U设备都具有很强的通用性。
The driver codes are written according to the standard USB device Class Specification for DFU, therefore the driver itself can be universally applied to all the DFU devices.
因为驱动是根据标准的DFU类规范要求所写，因而对任何DF U设备都具有很强的通用性。
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