多通道波特率自适应CAN总线监测系统

Multi-channel Baud Rate Adaptive CAN Bus Monitoring System

为满足无人机的多通道CAN总线监测要求,设计一种波特率自适应的多通道CAN总线实时监控系统。该系统使用FPGA作为控制芯片,可自动识别总线通信波特率并记录数据,双片冗余存储模块作为存储单元,引入基于汉明码(hamming code)的ECC数据纠错技术,最大限度地保证数据正确性。实验结果表明,系统能够对多种常用波特率进行自动、快速识别,并记录数据,相对于传统无ECC纠错技术的记录系统,数据误码率显著降低。

In order to meet the requirements of multi-channel CAN bus monitoring for high-altitude UAV,a kind of multi-channel CAN bus real-time monitoring system with adaptive baud rate was designed.The system used FPGA as the control chip,which can automatically identify the baud rate of the bus communication and record the data.The dual-chip redundant memory module was used as the storage unit,and the ECC technology based on hamming code was introduced to ensure the correctness of the data to the maximum extent.The experimental results show that the system can automatically and quickly identify various commonly used baud rate and record data.Compared with the traditional recording system without ECC,the bit error rate of data is significantly reduced.