用verilog 语言写的FPGA子程序，环境是quartus II 7.2 已经在EP1C6Q240上测试过，源码包含仿真文件和仿真结果，本程序可以直接嵌入做子程序使用。-FPGA with the verilog language written subroutines, the environment is quartus II 7.2 has been tested on EP1C6Q240, source code contains the simulation files and s