The invention relates to a secure nonvolatile data reading and writing method, which comprises the following steps of: reading data from a local storage medium by a main processing unit, and verifying and comparing the data with the data of the local storage medium, the data read by the main processing unit of the same sub-system and the data read by the main processing unit of another sub-system; if verification succeeds, the read data are output to the outside; the writing sub-method comprises the following steps that: the main processing unit acquires external input data and a cyclic redundancy check code of the data, and performs check comparison; and checking and comparing the data with the data acquired by the main processing unit of the same sub-system, and if the checking is successful, writing the data into a local storage medium. Compared with the prior art, the vehicle-mounted signal system based on the double 2-vote-2 architecture has the advantages that the consistency and the correctness of the data are ensured in a mode of carrying out check code calculation on the data and executing check comparison under specific conditions, and safe data reading and writing functions in a local storage medium are realized, and the like.
本发明涉及一种安全非易失性数据的读取和写入方法,读取子方法为:主处理单元从本地存储介质中读取数据,和本地存储介质的数据、与其同子系的主处理单元读取的数据以及另一子系的主处理单元读取的数据进行校验比对,若校验成功则对外输出读取的数据;写入子方法为:主处理单元获取外部输入数据和数据的循环冗余校验码,进行校验比对;和与其同子系的主处理单元获取的数据进行校验比对,若校验成功则写入本地存储介质。与现有技术相比,本发明具有基于二乘二取二架构的车载信号系统,通过对数据进行校验码计算和在特定的条件下执行校验比对的方式保证了数据的一致性和正确性,实现了本地存储介质中的安全数据读取和写入功能等优点。
Safe nonvolatile data reading and storing method and vehicle-mounted signal system
一种安全非易失性数据的读取和存储方法及车载信号系统
2025-05-16
Patent
Electronic Resource
Chinese
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