基于MCP2515的CAN总线通信单元设计  

Design of CAN bus communication unit based on MCP2515

作　　者：丁雪静 许永辉[1] 

机构地区：[1]哈尔滨工业大学自动化测试与控制系,黑龙江哈尔滨150001

出　　处：《现代电子技术》2015年第21期60-63,共4页Modern Electronics Technique

摘　　要：CAN总线接口芯片MCP2515采用SPI接口,具有体积小、低功耗、功能完善、使用方便等特点。为了实现基于该接口芯片的CAN总线通信单元设计,采用DSP+FPGA架构,在FPGA内部实现SPI接口逻辑和MCP2515指令转换逻辑,以完成不同的SPI指令,在DSP中接收上位机指令和完成对MCP2515的控制。实际测试结果表明,该通信单元设计合理,运行稳定,满足了实际需求。The CAN bus interface chip MCP2515 with SPI interface has the characteristics of small volume,low power consumption,perfect function and convenient use. To realize the design of CAN bus communication unit based on this interface chip,the DSP ＋ FPGA framework is adopted in this design. The SPI interface logic and MCP2515 instruction transformation logic are achieved in FPGA to accomplish the different SPI commands. The upper computer instructions are received and the control to MCP2515 is finished in DSP. The practical test results show that the communication unit has reasonable design and stable operation,which meets the actual needs.

关 键 词：CAN总线 MCP2515 SPI DSP 

分 类 号：TN915-34[电子电信—通信与信息系统]