串口两级缓冲区通信示例工程，适用于需要处理大量串口数据的应用场合，两个缓冲区分别为挑帧缓冲区和解帧缓冲区，分别在两个线程中进行，可有效解决突发大数据处理能力不足的问题。-The two level buffer serial communication example project, for applications where the need to handle a large number of serial data, the two buffer respectively choos