Design of the embedded CAN communication card based on FPGA

LI Mingxiong, WANG Ming, LI Xiaoming
（Faculty of Mechanical Engineering & Automation, Zhejiang SciTech University, Hangzhou 310018, China)

Abstract: In order to realize the embedded application and satisfy the need of modular design of CAN communication, a design method of the embedded CAN communication card based on FPGA was put forward. The hardware structure, chip selcetion and work principle were introduced. The design chose the embedded 32bit soft processors Nios II in FPGA as the main control chip, dualport RAM as communication interface between the node controller and the embedded CAN communication card, the CAN controller SJA1000 and transceiver PCA82C250 as CAN communication chip. The design idea and realization method of the card in the hardware and software were presented, as well as the experiment results.The experiments show that the design completely satisfy the requirement of the the embedded application of CAN communication, and has good performance on the characteristics of real time and highspeed communication.
Key words: field programmable gate array(FPGA)； Nios II； dualport RAM； controller area network(CAN) communication； embedded application