本代码是用来实现滤波器功能，通过前面板的显示来比较滤波前后的波形。-This code is used to implement the filter function to compare the before and after filtering through the front panel display waveform.

对数字信号进行滤波，然后将滤波前后的波形都显示在前面板上进行比较-The digital signal is filtered, and then the waveform before and after filtering are displayed on the front panel to compare