基于ARM7处理器LPC2119的USB-CAN转换器设计  

Design of USB-CAN Converter Based on LPC2119 of ARM7 Processor

作　　者：高敏[1] 

机构地区：[1]江苏省南通商贸高等职业学校应用电子系,江苏南通226007

出　　处：《现代电子技术》2010年第22期142-144,147,共4页Modern Electronics Technique

摘　　要：叙述一种使用ARM7处理器实现USB接口与CAN总线的方案,通过其可以在PC实现对CAN总线上设备的监控。系统的主控制器为NXP公司的ARM处理器LPC2119,内部集成两路独立的CAN控制器。USB接口采用沁恒电子的CH375。描述了USB-CAN通信接口工作的基本原理及CAN总线与USB之间的硬件接口电路。同时,分析了固件编程及使用通用I/O模拟并口读写时序方法。A scheme of using ARM7 processor to realize the USB interface and CAN bus is introduced, which can monitor the devices of CAN bus on PC. The system＇s main controller is ARM processor LPC2119 produced by NXP, which integrated two independent CAN controllers. USB interface circuit adopts QinHeng Electronics CH375. The basic principles about the USB-CAN com- munication interface and the hardware interface circuit between CAN and USB are described. At the same time, the method of the firmware programming and the use of general-purpose I/O port to simulate parallel read/write timing are analyzed.

关 键 词：CAN总线 USB LPC2119 CH375 

分 类 号：TN919-34[电子电信—通信与信息系统]