基于J2534协议的诊断仪与ECU模拟器接口设计

Design of interface between ECU simulator and fault diagnosis device based on J2534 protocol

针对目前在汽车后市场故障诊断仪诊断内容开发领域出现的由于平台复杂而导致诊断内容开发工程师效率低下的问题,对开发平台结构的组成、ECU模拟器软件的设计、J2534协议接口的实现等方面进行了研究,提出了把调试平台简化为一台电脑,将J2534诊断接口协议应用到诊断软件和ECU模拟器的通信中的思路,实现了离线故障诊断的仿真;开发了ECU模拟器及其与诊断仪的通信接口,模拟器采用双进程模型和诊断仪进行了通信,其与已开发完成的故障诊断软件Diag Analyzer间通过J2534协议所规定的API完成了通信。研究和测试结果表明:该ECU模拟器具备可行性和便捷性,诊断内容开发工程师只要在数据配置文件中写入特定的诊断数据,即可完成对特定车型诊断仪数据的快速开发;此外其可以和其他遵循J2534协议的故障诊断软件进行匹配和通信。

Aiming at the problem of low development efficiency of diagnostic engineers due to the complex composition of the platform in the development field of diagnostic content of diagnostic tool in automobile aftermarket,the composition of the development platform,the design of the ECU simulator and the implementation of the specified API in J2534 protocol were researched. The idea of simplifying the platform into one computer,applying J2534 protocol into the communication between diagnostic software and ECU simulator and implementing off-line diagnosis simulation were proposed. ECU simulator and the communication interface of diagnostic tool were developed,communication between ECU simulator and the diagnostic tool named Diag Analyzer was completed by the specified API in J2534 protocol. The dual-process model was adapted to communicate with diagnostic tool by this simulator. The results indicate that this design scheme is feasible and convenient,diagnostic engineer could develop the diagnostic content for specified type of vehicle quickly after writing special diagnostic data into data configuration file,finally,it also could match and communicate with other diagnostic softwares complied with the J2534 interface protocol.