利用DSP5502芯片，实现了cross-correlation算法，已运行调通，可以用Graph里面的time/frequency看效果。-Use DSP5502 chip to realize cross-correlation algorithm, has been running tune-pass, you can use Graph inside the time/frequency by the effect.

对采样信号进行FFT变换，并计算出频域的幅值。查看变量，生成FFT曲线图.基四频域FFT算法，CCS-FFT, the sampling signal and calculate the magnitude of the frequency domain. Viewing Variables, generate FFT graph. Base four frequency domain FFT algorithm, CCS