This is a demo using STM32F103z to convert voltages' A/D and transform basic data into spectrum using FFT algorithm
- table_fft.h (FFT表文件)
- stm32_dsp.h (调用DSP库函数的头文件，如果是自己编写的fft，则不需要此文件)
- cr4fft64_stm32.s 和 cr4fft256_stm32.s 和 cr4fft1024_stm32.s （DSP傅里叶变换的可执行函数，如果是自己完成的fft则不需要此文件）
- FFT2.c（和同一目录下FFT2) 这个是自己实现FFT的函数所在文件，其中包含简单的数据处理，滤波（如果是调用dps函数完成，则不需要此文件）
- dsp_g2.c (测试序列发生函数，fft调用函数，串口通信函数，全部封装在一个函数内，在main函数里面调用即可，这个是自己实现的FFT)
- dsp_asm.c （同上，不过这个是直接调用库函数的FFT，不推荐使用）
- table_fft.h (Fast Fourier Transform Table Files)
- stm32_dsp.h (Used to call the DSP library function header files, you do not need this file if you have prepared the Fast Fourier Transform using software algorithm already)
- cr4fft64_stm32.s and cr4fft256_stm32.s and cr4fft1024_stm32.s （Executable functions used to perform DSP's Fourier Transform, you do not need this file if you have prepared the Fast Fourier Transform using software algorithm already）
- FFT2.c（And the FFT2 library files under the same directory) This is the function of their own FFT file, which contains a simple data processing, filtering (you do not need this file if you call dsp's function to complete)
- dsp_g2.c (Test sequence generation function, Fast Fourier Transform call function, serial communication functions, all encapsulated in a function, inside the main function can be called.btw,this is their own implementation of the FFT algorithm)
- dsp_asm.c （Ibid, but this is a direct call library function FFT algorithm is not recommended）