使用指定的端口名称、波特率、奇偶校验位、数据位和停止位初始化。
Class using the specified port name baud rate parity bit data bits and stop bit.
数据的编码采用了曼彻斯特编码格式，每帧数据包括同步头、有效数据位和冗余校验位三部分。
Manchester code was used in data coding, each frame of data included synchronous head, valid data bits and cyclic redundancy parity bits.
增加数据包校验位，保证数据传输的一致性；通过正向替换和逆向替换消除并恢复数据中存在的保留关键字；
The data packet increased checking parity can ensure data consistency in transmission, to remove and recover a reserved keyword of data though the positive replacement and reverse replacement.
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