该程序是Xilinx7系列FPGA多重程序加载的代码，在FPGA外部FLASH建立多个程序镜像和map，通过代码实现不同镜像的加载和切换(The program is Xilinx7 series FPGA multi program loading code, in the FPGA external FLASH to establish multiple program mirroring and map, through the code to achieve different imag