基于ARM的蓝牙CAN分析仪设计

Bluetooth CAN Bus Analyzer Design Based on ARM

针对CAN总线通信质量、测试和验证的需要,以及传统CAN分析仪的复杂性,且必须选择PC机作为显示终端的不足,论证了一种基于ARM单片机和智能手机的CAN总线分析仪设计。该分析仪采用以ARM单片机为核心的硬件电路完成对CAN网络的实时数据收集和监控;采用蓝牙通信方式实现分析仪与智能手机的通信并以智能手机为终端完成数据分析。文章对分析仪硬件、软件和智能手机页面进行了具体设计,提出了一种新的波特率自动检测方法,最后给出了所设计的CAN总线分析仪的实际试验结果,可实现CAN总线波特率自动检测、正常监测以及CAN总线状态分析的功能。

According to the requirements of communication quality,testing and verification of CAN as well as the existing problems of CAN bus analyzer,a CAN bus analyzer design based on smartphone and ARM is proposed.In the design,ARM is used to obtain real-time raw data,bluetooth is exploited to realize the data conversion between CAN bus analyzer and smartphone.The design details of hardware,software and smartphone are thoroughly discussed and a new method for Baud rate automatic detection is also described.Experimental results on a verifying CAN system with functions above are provided at the end.