STC12C5A60S2来完成AD采样，量化编码，同时另一路使用滞后比较器计算频率，将被采样信号存储到一个定义的BUFF内，并上传到串口屏，来显示被测波形(STC12C5A60S2 completes the AD sampling and quantization coding, while the other uses the lag comparator to calculate the frequency. The sampled signal is stored in a define