【摘要】 针对监控现场电磁干扰严重、环境恶劣、安装条件复杂、数据通讯量大以及对数据处理的时实性要求苛刻等具体情况,根据循环冗余校验码(CRC)的基本原理,设计了表驱动算法实现循环冗余校验.该算法在中心处理机用Delph4 0宏汇编来实现,在前置端机则用MCS-51单片机汇编语言来实现,二者可相互移植.由于CRC的表驱动算法的软件实现,系统不需要设计另外的硬件电路,降低了成本,减小了设备安装尺寸,校验速度非常快,提高了远程监控网络的通讯速度和报文传输准确性.更多还原

【Abstract】 In remote data communication,in order to reduce the error rate of the data link,Cyclic Redundancy Check(CRC) is generally adopted to detect and control the error code.Now the table-driven algorithm based on the principle of the CRC has been designed to implement the CRC,for the circumstances-the serious electromagnetic interference,the severe environments,the complicated installation conditions,large numbers of the data communications and the strict requirement of the real-time data processing.In more detail,the algorithm has been completed in the macroassembler of Delphi 4.0 in the central processor and carried out in assembly language of the MCS-51 chipset in the front devices.Because the CRC is implemented by the table-driven algorithm,any additional hardware circuits are not necessarily to be appended to the system.Thus the cost will be reduced and the device size becomes much smaller.At the same time the speed of the data communication of the remote monitoring control network and the precision of the message transmission have been promoted greatly.更多还原