这是《ARM嵌入式常用模块与综合系统设计实例精讲》一书中的程序源代码，稍加修改便可应用于自己的工作中或者完成自己的课题。-This is the ARM embedded commonly used modules and integrated system design example精讲 one book source code, a little modification can be applied to their own work or to complete its task.