并串转换模块，内含有另个.vhd文件。一个是自己写的比较简单 另一个是参考的。-And the string conversion module, which contains another one. Vhd file. One is its relatively simple to write the other is the reference.

串口232程序，实现并串转换及相应的操作-Serial 232 program, to achieve and string conversion and the corresponding operation