（1）2-1.asm对应第二章主程序代码； （2）2-2.asm对应第二章主程序中断向量代码； （3）2-3.cmd对应第二章主程序配置文件代码； （4）2-4.asm对应第二章写Flash程序代码； （5）2-5.cmd对应第二章写Flash配置文件代码； （6）2-6.asm对应第二章写Flash中断向量代码； （7）2-7.cmd对应第二章写Flash工具代码； （8）2-8.asm对应第二章DSP读USB接口代码；

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

If you’re involved with designing or programming devices that incorporate a USB mass-storage device or host interface, this book will help you get your projects up and running. You’ll also find the book useful if you’re designing or programming

U盘/SD卡读写例程，使用SPI和UART接口编写-U disk/SD Flash RW access demo，with SPI & UART interface