基于ADuC845的CAN总线智能节点的设计

CAN总线现在已被公认为是最有前途的现场总线之一。ADI公司的片上系统（SoC）级微控制器ADuC845功能强大，尤其精于数据采集与处理领域。本文介绍了一种采用微控制器ADuC845、CAN总线控制器SJA1000和CAN总线驱动器PCA82C250组成的CAN总线智能节点系统的设计方案，给出了该系统的硬件原理图和软件流程图。实践证明该系统大大地减小硬件的体积和程序的空间井在高速数据采集和处理方面得到很大的提高。

Design of the Intelligent Nodes in CAN System Based on ADuC845

CAN is considered as one of the most promising field bus. The SoC ADuC845 of ADI Company, which has powerful functions, is skillful in the field of data sampling and processing. This paper introduces a design scheme of the CAN intelligent nodes system eonsisting of the micro controller ADuC845, CAN controller SJA1000 and CAN driver PCA82C250,with the hardware schematic diagram and software flow chart of the intelligent node system. The application proves that it can markedly reduce the hardware volume and the program space, and enhance the ability of data acquisition and data processing at high specd as well.