The Test Of Automotive Electronic Control Unit Based On Configuration Technology

With the continuous development of computer technology and automotive electronics technology,automotive electronics productions are widely used,and the performance of electronic control unit is gradually growing,and the functions are gradually abundant,then the numbers are gradually increasing which can be ranging from 20-100 in a modern vehicle.And ECU is developing towards the intelligent and diversified direction.As the brain of the car,its performance directly affects the stability and safety of the vehicle,so the test of ECU is extremely important.While,many problems exist in the traditional test such as low accuracy,time-consuming programming and test cases,and huge costs.But the problems can be effectively solved with the application of configuration technology,and configuration technology is "building blocks" to set,by which way the required codes can be shown instead of manual programming.And configuration technology is used in ECU testing according to the needs of the project.in this essay.In this way,the cycle is shortened and the staff with limited programming skills is capable to accomplish the testing work.Firstly,the related contents of ECU,CAN Bus and protocols used in this essay are studied.In the test of the essay,the network layer obtains the package transferred from the application layer and unpacks to extract the data which is packed by using the format set by the enterprise,then packs the data by using K format and CAN format,then the package is sent to ECU.And every ECU does the selection to receive or discard the package according to the mask ID.After receiving the data,ECU replies the data which is packed by using K format and CAN format,then the data will be packed by using the format set by the enterprise and it will be sent back to the application layer.Lastly,the staff judges whether there are faults in ECU,so they can deal with them.Then,the background,principle and main function are detailedly introduced in this essay,and the enterprise-level configuration software used in the essay which is called Graphical Code Builder is explained,and the function of every part of content in the test are introduced.At this stage,the feature that processes are dragged to generate codes is used to assist the test of ECU,such as the generation of the order file,the configuration file and test sequences.Finally,in the first-line workshop production,the assembly of ECU is accomplished,and the test of the hardware equipment which connects with ECU is completed in the essay.