C51写的点阵频谱源码，绝对原创，采用STC12C5A60S2,单片完成信号采集，FFT运算和点阵屏的驱动，点阵屏为 12832双色。有注释，简单易懂，容易移植。-C51 source code written in dot matrix spectrum, absolutely original, with STC12C5A60S2, single complete signal acquisition, FFT operation, and dot-matrix screen of the