有请做过Mass Storage类设备的大虾来指点一下方向！

小弟之前用手头上的开发板资源做了一个自定义的HID类设备，
将Input Report和Output Report长度都定为4 Bytes，
用Interrupt 传输发送Input Report给Host，
用Control传输接收从Host发送的Output Report，
成功的实现了对设备的读写。

由于项目的最终目标是要读/写设备EEPROM中的数据（也就是要做一个EEPROM编程器），
而且每次读/写操作的数据量在几十K Bytes，
因此个人觉得采用HID设备的来做似乎不合适，
所以想请教各位大虾，
希望能指点一下方向。

为了简化开发过程，希望能避过写驱动程序，仍然采用USB Org定义的标准设备类型，
想请问各位：
1、将该设备定义成Mass Storage类还是Communication Device类比较适用于我所描述的设备？
   因为Mass Storage类设备是不用自己写驱动程序的，但是简单看了一下定义成该类的设备类型，大多数都是Hard drive，CD、DVD drive居多，似乎没有用作EEPROM编程器的，希望有做过Mass Storage类设备的大虾指点一下，采用该类标准做是否可行？
  
2、如果上面所说的两种标准类设备都不适合的话，应该是哪种标准类设备比较适合？

拜谢各位！

可以用HID去做，用SET_REPORT和GET_REPORT去做

Jan Axelson的《Mass Storage--Designning And Programming Device And Embedded Host》这本书能共享一下吗？
maggieshaw@gmail.com谢谢了

找到了周立功的开发包中关于做EEPROM编程器的例程
看了一下代码，它是用Test & Measurement Class类设备来做的
但是它提供了驱动文件
为什么要用驱动程序呢？
把源代码共享一下先
希望有人来回答我的问题

刚刚从Jan Axelson的《Mass Storage--Designning And Programming Device And Embedded Host》书中看到下面的话，看来用Mass Storage做我这个EEPROM编程器并不合适，唉，再看看别的先。显然我做的东东比它说的要简单些的说。

大虾们，指点一下啊。

Designing and programming a USB mass-storage device or embedded USB host involves a variety of interfaces, protocols, and structures. Every USB mass-storage device must support two interfaces:
• A USB device interface to enable the device to communicate with a PC or other USB host.
• An interface between the device’s microcontroller or other CPU and the storage media. Flash-memory cards typically use the Serial Peripheral Interface (SPI), MultiMediaCard bus, SD-Card bus, or a bus derived from the ATA interface or PC-Card bus. Hard drives typically use the ATA parallel interface.
每个USB Mass-Storage设备必须支持两个接口：一是与PC或者其他的USB Host的接口；另一个是在设备MCU与存储介质之间的接口。

A USB mass-storage device must implement these protocols and structures:
• Generic USB protocol. Every USB device must respond to requests sent by the USB host and other events on the bus.
• USB mass-storage protocol. Every USB mass-storage device must detect and respond to requests that are specific to the USB mass-storage class.
• SCSI commands. USB hosts access mass-storage devices via commands originally developed for devices that use the Small Computer Systems Interface (SCSI).
• Media-specific protocol. The storage media’s controller typically supports a command set for accessing the media’s contents. Many flash-memory cards use the MultiMediaCard protocol or the SD Card protocol. Hard drives use the ATA protocol.
USB Mass-Storage设备必须处理以下协议：
通用的USB协议；USB Mass-Storage类协议；SCSI命令；存储介质特定协议。

Reading and writing data to a mass-storage device also involves understanding logical structures in the media:
• Media structure. Program code accesses the storage area in drives as a series of logical blocks, or sectors. Dedicated areas in the media store information about the logical blocks and other logical structures in the media.
• File system. If the device firmware reads or writes to files on its own, rather than via a USB host, the device must implement a file system such as FAT16 or FAT32.
向Mass-Storage设备读写数据同样要理解存储介质的逻辑结构：
存储介质结构；文件系统。