020单片机ADC1采样程序；额外功能：main中主要实现与FPGA并口通信，总体实现FFT,不过FPGA部分没有上传，因此能实现的是ADC1采样。-020 SCM ADC1 sampling procedures additional features: main key to achieve in parallel with the FPGA communication, achieving an overall FFT, but the FPGA portion not uploaded

本工程文件用于fpga开发板和USB键盘连接通信 可以实现键盘按键响应(This engineering file is used for FPGA development board and USB keyboard connection communication to achieve keyboard key response)