实现FPGA读取AD转换的数据，AD芯片我采用的是ADS7844，采用的是SPI通信方式-achieve the function of read the data from the AD transform chip.the communciation method is SPI.i have tested the code ,and it can work.

linux操作系统环境下进行快速傅里叶FFT变换分析的C程序代码-Linux operating system environments under the fast FFT Fourier transform c code