Design And Implementation Of The Communication Stack Software For Vehicle Electronics

With the continuous improvement of people’s physical life, the great demand in the market resulted in a surprising development of automotive industry,the automotive electronics has become an important factor to improve the car brand.In traditional development exist low speed of exchanging and updating in vehicle,difficult management of entire software system,high cost of development.Given that backdrop,International auto giants such an Mercedes Benz,BMW,GM and other company put forward AUTOSAR specification in order to establish a set of standardized,open software architecture.Because of the principle of same standard,different implementation,China’s automotive industry must develop a set of own automotive electronics software system based on AUTOSAR specification to catch up with foreign advanced country.In the field of automotive electronics, the communication among electronic control units has become a hot topic because of the more complicated vehicle electronic system. Aiming at the above-mentioned problem this thesis conducts the research on the automotive internal communication. The main content of this thesis includes:1) Carried out research on AUTOSAR specification that focused on the system architecture.With the combination of CAN bus protocol,designing the system architecture of the communication stack software for automotive electronics with the reference to AUTOSAR specification. This software has good maintainability.2) Realized the CAN bus driver module based on AUTOSAR specification which is based on Free Scale’s MPC5634 platform.3) Realized the CAN interface module based on AUTOSAR specification which is the abstraction of CAN bus driver module. All request from the upper module have access to CAN hardware only through the CAN interface module.4) Realized the PDU Router based on AUTOSAR specification which manages the path of data’s transmission and reception and maintains several routing engine function and routing table.5) Realized the COM module based on AUTOSAR specification which provides the communication function and all reliability mechanism is also realized in this module.The work of this thesis comes from the actual project requirement which designs the communication stack software for automotive electronics. The improvement of the COM module to guarantee the reliability of communication is an innovation with the combination of sequence number, time monitoring and CRC check.