串口通信数据包状态机算法的解析代码片段，该代码片段可作为工程应用中上位机和下位机串口帧协议解析的参考，实现了一种基于状态机解析算法-Serial communication packet state machine algorithm for parsing code fragment, the code fragment can be used as engineering applications, PC and slave serial protocol analysis frame of reference, implements a state machine parsing algorithm