Abstract
As Chinese national economical construction and rapid development of industrial
modernization,vehicles play an increasingly important role in the period of economic
development. 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 electronically 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 satellite 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 all 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. 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 its 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,backlight camera and network communication and so on. Through
further study,onboard integrated information system will become an important equipment in
future automobile.
Key words：Vehicle Instrument;Linux;Qt/Embedded.
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