个人原创，已经测试通过。功能：完成串行数据与RS232格式数据的收发转换，ST16C450+串并双向转换兼收发时序产生功能，优点：省去了传统的ST16C450需要CPU干预的缺点，简化设计，
纯硬件自动转换，缺点：忽略各种异常报警，适用于误码测试时使用（传输错误由误码测试功能模块完成检测）。,Personal originality, have the test. Function: the completion of serial data and send and receive RS232 data format conversion, ST16C450+ String and two-way conversions and transceivers generate timing features, advantages: eliminating the traditional need for CPU intervention ST16C450 shortcomings, simplify the design, pure hardware automatically converted, disadvantages: ignore the various abnormal alarm, error test applies to the use of (transmission errors by the error detection test function modules completed).