里面关于开发MP3的驱动的一个方案，里面有详细的开发过程和原代码啊-MP3 inside the drive on the development of a program, which detailed the development process and the original code ah

STM3210B-LK1开发板玩USB的程序，包含固件、驱动和测试用的应用程序,上下位机通讯，很简单的实现。-The LK1 development board STM3210B-play USB-program, including firmware, drivers and test applications, the upper and lower machine communication, very simple to achieve。