基于CCP协议的车载控制器软件刷新系统设计

摘要

该文基于汽车车载控制器对应用程序更新的需求,设计了一套方便快捷的车载控制器刷新方案.采用LabVIEW图形化编程平台开发的上位机下载软件,按照扩展的CCP协议进行数据传输,控制器凭借预先封存在芯片内部的Bootloader引导程序将数据写入到指定地址的Flash中,完成应用程序更新.所开发的刷新系统最终在汽车电子驻车制动系统中实现了程序更新.结果表明,系统直接利用汽车上现有的CAN网络资源,提高了系统升级的效率和可操作性,节约了成本和人力,采用自定义扩展的CCP协议通讯,充分利用CCP协议安全机制的同时简化了通信过程.%Based on the requirement of application update of vehicle controller,a set of convenient and fast vehicle controller software refresh system is designed.The host computer download software developed by LabVIEW,data transmit according to CCP.The controller updates the application program by writing the data into the Flash of the specified address by using Bootloader which pre-encapsulated in the chip.The developed refresh system finally realizes the program update in the parking brake system of the automobile electronic parking system.The results show that the system can improve the efficiency and maneuverability of the system by using the existing CAN network resources,and save the cost and manpower.CCP communication using custom extensions,make full use of the CCP security mechanism and simplify the communication process.