利用matlab GUI实现的串口编程例子，FIR 底通和带通滤波器和IIR 底通和带通滤波器，二维声子晶体FDTD方法计算禁带宽度的例子。- Use serial programming examples matlab GUI implementation, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Dimensional phononic crystals FDTD metho