CRC即循环冗余校验码（Cyclic Redundancy Check[1] ）：是数据通信领域中最常用的一种查错校验码，其特征是信息字段和校验字段的长度可以任意选定。循环冗余检查（CRC）是一种数据传输检错功能，对数据进行多项式计算，并将得到的结果附在帧的后面，接收设备也执行类似的算法，以保证数据传输的正确性和完整性。-CRC is the most commonly used in the field of data communication error check code, which is characterized by the information field and the length of the check field can be arbitrarily selected. Cyclic Redundancy Check (CRC) is a data transmission error detection function, the data is polynomial calculation, and the results will be attached to the back of the frame, the receiving device also performs a similar algorithm to ensure the correctness and integrity of the data transmission Sex.