u盘的实现，程序以Cypress的bulkloop例子为基础改动而来，加入了SCSI文件，实现U盘基本功能，可以识别读写和创建文件。编译时请确认装了cypress的软件，否则会缺少头文件-u disk implementation procedures based on Cypress' s bulkloop example of change from adding the SCSI document, to achieve the basic functions of U disk, read and write and create files can be identified. Compile time, make sure the software installed cypress, otherwise it will lack header files