基于Arm-Linux的车载信息平台的研制

Research and development of in-vehicle information platform based on Arm-Linux

为了对电动汽车(EV)示范运营实现远程监控与调度,研制了一种基于嵌入式系统的车载信息平台.采用Arm处理器,扩展薄膜晶体管格式液晶显示器(TFT-LCD)接口,以控制器局部网总线(CAN-Bus)方式,采集电池、电机、电控子系统信号.Arm处理器以同步外设接口(SPI)方式与CAN控制器相通信,开发了Arm-Linux嵌入式系统下的CAN-Bus驱动及应用程序,且设计了嵌入式环境下图形界面系统(GUI).结果表明,该平台能以数字化、图形化方式显示车载信息,还能以通用无线分组业务(GPRS)无线通信方式与智能充电站进行信息互换.CAN-Bus在嵌入式系统下的驱动程序是设计该平台的关键,该平台扩展了CAN-Bus的应用领域.

To remotely monitor and manage electric vehicles （EV） in trial traffic, an in-vehicle information platform based on embedded system was developed. The platform adopted Arm processor to extend thin film transistor liquid crystal display（TFT-LCD） interface, and acquired the subsystem signals of battery, motor and electric controlling unit by controller area network bus （CAN-Bus）. After the serial peripheral interface （SPI） was used to implement communication of Arm processor with CAN controller. CAN-Bus driver program and application program in Arm-Linux embedded system were designed, and the graphical user interface （GUI）based on Arm-Linux was developed . The results indicate that the platform can display in-vehicle information by graph and digital method, and communicate wirelessly with the intelligent charge station by general packer radio service （GPRS）. CAN-Bus driver program in Arm-Linux embedded system was the key for designing the platform. The platform extends the application field of CAN-Bus.