说明：  嵌入式系统需要完成的功能是采集两路数据，并完成数据存储和转发功能。并且要求系统对前端信号有实时增益控制的功能。通过对设计要求的理解。
(The function of embedded system is to collect two data, and to complete the function of data storage and forwarding. And it is required that the system have the function of real-time gain control for the front end signal. Through the understanding of the design requirements.)