Study And Development On Instrument Of Electric Vehicle Based On Can Bus

As the increasing development of modern automobile technology, the degree ofauto electrification is becoming higher and higher. automobile instrument, as theimportant component in auto electrical system, displays increasing amount ofinformation, especially the CAN bus technology applied in auto industry can’t meet therequirements of information displaying for modern autos in traditional instruments. Thenew CAN-based bus digital automobile instrument will present the future developmentin auto industry.According to functional requirement of auto instrument in electrical autos, thisproject has designed vehicle-mounted digital automobile instrument based on CAN bus.The hardware platform consists of ARM Cortex-M3-core based STM32F103VCT6microprocessor and its peripheral configuration circuits, including CAN driving circuit,Ethernet interface, SD card,232interface, LCD and touch panel, etc.As for software, taking consideration of the artistic appearance of the instrumentalinterface as a whole and the instantaneity of the system, this project has chosenμC/OS-Ⅱ system as the core for software developing platform, together with applyingtechnology of μC/GUI graph user interface and digital LCD to design utility software ofthe instrument, basing on multi-task design process.At last, the project has set up the hardware-in-the-loop test platform for CAN busdigital auto instrument with MicroAutoBox controller by DSPACE, and the CANnetwork information is transmitted by MicroAutoBox controller in analog signal whichwill be received and processed by auto instrument, simultaneously, shown in instrumentinterface so as to check the effectiveness of instrument system designed.