稍作修改，就可以用于其他任何需要显示波形的地方。
Only do a little modification, it can be used to anywhere wave-display is necessary.
可实时显示波形的类型、频率、幅度和步进值，显示效果良好。
Real time shows that wave types, frequency, magnitude and step by step, show good results.
采用8位LED显示器动态刷新方式，显示波形类型、频率和幅度。
Using 8 LEDs display dynamic to renovate the method, display waveform type, frequency and the range.
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