摘要
首先研究CAN总线和SAEJ1939协议,提出一种基于MC9S12HZ256微控制器的总线式汽车数字仪表解决方案。详细介绍SAEJ1939协议的报文帧格式及应用层协议中发动机相关参数的定义,以及步进电机及其驱动和车速信号的处理方法。该数字仪表系统硬件平台由微处理器和信号采集和信息处理及显示等模块组成。软件设计部分编程实现了对CAN总线和各传感器数据的读取、处理。该系统能够实时反映车辆工况。
In this paper,CAN bus and SAE J1939 protocol are researched,and a vehicle digital instrument solution based on MC9S12HZ256 MCU is proposed.The message frame format and some engine-related parameters＇definition in SAE J1939 application layer protocol are introduced in detail.Stepper motor and its driver,the methods of speed signal processing are also introduced.The hardware platform of vehicle digital instrument is composed by MCU, signal acquisition module,and signal processing and displaying module.Data receiving and processing from CAN bus and sensors are accomplished by programming, and vehicle condition can be reflected in real-time.
出处
《电子设计工程》
2010年第2期83-85,88,共4页
Electronic Design Engineering
作者简介
董浩（1985-），男，河北唐山人，硕士研究生。研究方向：汽车电子
