基于DSP和FPGA的CAN总线通信系统设计  

A Design of CAN Bus Communication System Based on DSP and FPGA

作　　者：李晓[1] 李芮[1] 王志斌[1] 韩枫[1] 

机构地区：[1]中北大学山西省光电信息与仪器工程技术研究中心,太原030051

出　　处：《计算机测量与控制》2015年第1期284-286,共3页Computer Measurement &Control

基　　金：国际科技合作项目(2013DFR10150);国际科技合作项目(2012DFA10680);国家自然科学基金仪器专项基金(611127015);山西省国际科技合作项目(2012081029)

摘　　要：为了提高高速条件下数据传输的稳定性和可靠性,文章提出了运用DSP与FPGA相配合的方式,控制CAN总线实现数据传输;系统采用SJA1000作为CAN总线控制器;采用PCA82C250作为CAN总线收发器;采用特有并行处理方式的FPGA实现对CAN总线控制器读写、使能等信号的控制;采用数据处理单元DSP与CAN总线控制器直接进行数据传输,省去了数据在DSP与FPGA之间传输的时间;采用两片74LVC4245完成3.3V TTL标准信号与5VCOMS电平信号之间的转换;实验结果表明,系统数据传输过程稳定可靠,可以基本满足高速信号的处理与传输要求。In order to improve the stability and reliability of high-speed data transmission conditions,the paper proposes the use of DSP and FPGA compatible manner,control CAN bus for data transfer.System uses a CAN bus controller SJA1000; using PCA82C250 as CAN bus transceiver; using the unique parallel processing FPGA implementation of the CAN bus controller to read and write,so that control energy and other signals; using a data processing unit DSP and CAN bus controller direct data transmission,eliminating the need for data transfer between the DSP and the FPGA time; 74LVC4245 complete the conversion using two standard signal level signal and 5 V COMS between 3.3V TTL.Experimental results show that the system is stable and reliable data transmission,processing and transmission can basically meet the requirements of high-speed signals.

关 键 词：CAN总线通信 数字信号处理 现场可编程门阵列 SJA1000 PCA82C250 

分 类 号：TN915.9[电子电信—通信与信息系统]