基于单片系统控制器的A/B系统升级技术研究  

Research on Upgrading Technology of A/B System Based on Vehicle SoC Controller

作　　者：周恒 刘禹池 孔祥明 周时莹 于诗洋 刘禹宏 Zhou Heng;Liu Yuchi;Kong Xiangming;Zhou Shiying;Yu Shiyang;Liu Yuhong(Global R&D Center,China FAW Corporation Limited,Changchun 130013)

机构地区：[1]中国第一汽车股份有限公司研发总院,长春130013

出　　处：《汽车工程师》2024年第11期1-6,共6页Automotive Engineer

摘　　要：针对空中下载(OTA)升级失败时单片系统(SoC)电子控制单元(ECU)无法进行软件回滚的问题,提出了一种A/B系统升级技术,通过读取ECU中杂项(MISC)分区信息,将程序下载至备份分区,并通过设计A/B系统的优先级来选择激活分区,进行安装启动或安装失败时软件回滚,同时,设计了A/B系统的差分升级技术。经搭建系统测试,采用该技术的控制器在升级失败后可进行软件回滚,验证了回滚技术的可行性、有效性及稳定性。The A/B system upgrading technology is proposed to solve the problem that the System on Chip(SoC)Electronic Control Unit(ECU)cannot roll back the software when the Over-The-Air(OTA)upgrading failed.The technology downloads the program to the backup slot by reading the MISC of ECU slot information,and starts the installation by designing the priority level of the A/B system to select the active partition or rolls back the software in case of upgrading failed.At the same time,the differential graded technology of A/B system is designed.The ECU using this technology can perform software rollback when upgrading fails,and the feasibility,effectiveness and stability of rolling back software technology are verified by building a test environment.

关 键 词：空中下载 MISC分区 A/B系统 软件回滚 差分升级 

分 类 号：U461[机械工程—车辆工程]