文件中包括电子琴、步进电机控制、电子钟等实用程序控制，已经通过了编译，适当设计编译环境、端口等相信会对该方面的朋友有帮助。-document include organ, stepper motor control, electronic bell practical programmed through a compiler, appropriate Design Compiler environment, ports, etc. I believe that the friends help.