Design Of Automobile Panel Based On ARM And Embedded Linux

The panel of automobile is the main instrument of automobile,through which the driver can get the status of the automobile,and the safety of driving is greatly influenced by it.Recently,with the widely using of computer,micro-electronics and field bus communication technology,automobile electronical technology is developing fast,and the traditional mechanical and electrical combined instrument could not meet the need any more.Especially with the development of automatic drive and satellitic navigation technology,the panel of automobile is expected to become an integrated information system with multifunction of displaying, controlling,communication and entertainment.The paper is to present and design an onboard panel system in which an ARM controller is used as CPU and Embedded Linux is used as the core of software.With the Embedded Microprocessor as its core,the panel could acquire various information of the vehicle,such as the cell voltage and the vehicle velocity.At the same time,the system can process,display and warn in the abnormal situation.Therefore,the driver could react correctly according to the alarm,which makes the car always run in a safe condition.As a node of CAN network,the panel can receive message from other CAN node and also send message to other node.The appearance of the system is different from the traditional panel of automobile.A LCD screen is used to replace all the traditional display equipment,and all information of the vehicle is displayed on the screen.In order to meet the driving custom of the driver,the speed of vehicle and it's engine are displayed on the screen by the form of simulated pointer.The caution lights with sound signals well display on the screen in the limited or abnormal condition.After introducing the developmental trend of the panel of automobile,the paper emphatically show how to develop embedded system,including establishing embedded platform,designing device driver,displaying interface and application program.Hardware and software can be reducing or increase which is a strongpoint of embedded system.So,one key point of the paper is to design device driver.As the display centre,information displaying must be in time and precise.So,designing display interface is another key point of the paper.The designed panel of automobile is a rudiment of onboard integrated information system.It can expediently append the function of GPS navigation, backsight camera and network communication and so on.Through further study, onboard integrated information system will become an important equipment in future automobile.