Design And Development Of Automotive CAN-BUS Dashboard

This paper is based on automotive accessory science project of JILIN province which is called"The Design and Product of Automotive Electronic Dashboard Based on Bus Communication".By research this paper has done a lot of conclusion.It has expatiated the design and development method of automotive CAN-BUS dashboard.It has designed PCB of dashboard and has accomplished diplay of vehicle speed,rotate speed ,water temperature,oil depth,mile,gear,and alarm.It has developed CAN-BUS physical interface at hardware and transmit/receive program by CAN technique.It has accomplished convert protocol by MSCAN of MC9S12HZ256 microcontroller and CAN-BUS communication of TJA1050.It has defined transmit protocol among ECU and the function of automotive CAN-BUS dashboard.It has researched the work theory and inside structure of step motor. The drive of motor is through MC9S12HZ256 microcontroller.MC9S12HZ has four step motor module. To make the motor stable the program use the real time interrupt to solve the control process. The program adjusts the angle and speed by actual feeling of the driver.It has developed display drive program of mile metre so it can display totalmile and relativemile.The LCD is composed of 88 segment of MC9S12HZ256's LCD module.It has made the program of EEPROM to the power-off protection, so the driver can know the vehicle's state next time. This paper use cycle write program to prevent the EEPROM module over write.There are so many LED on the automotive dashboard. It adoptsμPD6345 to increase general I/O port. LED is economy and reliable so it is preface omit light component.This paper integrated main function module and arranged the layout of dashboard and has developed the hardware and software of automobile CAN-BUS dashboard and drive software.It uses M68KIT912DP256 to creat CAN-BUS signal and test the performance of dashboard.It uses MSCOMM active to make human interface to control signal so it has built test system of automotive CAN-BUS dashboard and has accomplished test work.