为了实现文件传输功能，特整理了一下有关读取指定文件下其子目录信息的读取方法，及添加双击事件循环读取下一层信息的功能。 -In order to achieve the file transfer function, special order a bit about reading the specified file to read the information under the method of its subdirectories, and added double-click

双闭环可逆直流调速（H桥）simulink仿真模型，波形很好((Double closed loop reversible DC speed control (H bridge) Simulink simulation model, the waveform is very good))