循环冗余码校验英文名称为Cyclical Redundancy Check，简称CRC，它是利用除法及余数的原理来作错误侦测（Error Detecting）的。实际应用时，发送装置计算出CRC值并随数据一同发送给接收装置，接收装置对收到的数据重新计算CRC并与收到的CRC相比较，若两个CRC值不同，则说明数据通讯出现错误。-Cyclic Redundancy Check English name for the Cyclical Redundancy Check, referred to as the CRC, it is the use of the principle of division and the remainder to make error detection (Error Detecting) of. Practical application, transmitting device calculates the CRC value and sent along with the data to the receiving device, the data received by the receiving device recalculates the CRC and compared with the CRC received, if the two CRC values are different, the data communication occurs error.