基于stm32 DSP库的1024个点的FFT运算，对st公司的源程序进行了改进。仅需修改少量定义就能换成256点或64点的运算-Stm32 DSP-based library of 1024 point FFT operation, the company' s source of st has been improved. Can only modify the definition of a small amount of 256 points or 64 points into c

测试STM32F4的DSP 库的FFT函数，程序运行后，自动生成1024点测试序列，然后，每当KEY0按下后，调用DSP库的FFT算法（基4法）执行FFT运算，在LCD屏幕上面显示运算时间，同时将FFT结果输出到串口，DS0用于提示程序正在运行。(Test the FFT function of the DSP Library of STM32F4. After the program runs, the 1024 point test sequence is automatically gen