Research And Implementation Of Lower Machine Of Calibration System And A2L File Based On ASAP Standard

With the rapid development of automobile industry,the problem of pollution caused by auto mobile exhaust becomes more and more serious,and then the electronic control technology is arises at the historic moment.The performance of ECU is determined by the calibration system,which is an important part of a car.With the development of calibration system,traditional ECU can't adapt to the trend of The Times in face of large amount of code,thus the design of universal calibration system is imperative.A simulation model such as Matlab and Simulink is a mathematical model that can automatically generate source code.There is a big gap between domestic and international research in this respect.Lower machine of calibration system based on ASAP standard is designed in the paper.In addition,an software is designed by Matlab,which can automatically generate driver code and A2 L file.The main research work is as follows:(1)Studying the knowledge of ASAP1 standards and CCP Communication Protocol.In this paper,the hardware circuit and underlying driver of calibration system is developed,mainly consisted of ECU module,power supply control module,CAN transceiver module,CAN driver and CCP driver.(2)By analyzing the ASAP2 standards and studying MFC message response mechanism,an A2 L file generation software and an A2 L file parsing software based on the visual interface are designed,considering the current status of lack of A2 L file generation software in domestic.A2 L file generation software includes file operation module,IF_DATA module,equipment parameter parsing module,variable attributes setting module,format conversion module.MAP file import module is designed,which supporting associated with authentic memory address of ECU internal data.(3)Studying the knowledge of automatic code generation from Matlab/Simulink for calibration system.A simulation model is built by Matlab/Simulink,which can automatically generate driver C code and A2 L file,promising ECU in proper operation.After design finished,this paper testes calibration system including hardware circuit,drivers,A2 L file generation and parsing software modules by the INCA software tool to verify the correctness of the software function module.