| The subject completes intelligent node design and implementation, through the deep study about CAN 2.0 communication protocol, combined to CAN BUS Controller SJA1000. The Paper first intrduces the CAN BUS background and features, It focuses on the various functional modules of hardware development, including the minimum working system about 89S52, control module of CAN bus, power module, input and output modules and CAN bus circuit design of intelligent node system. the paper focuses on software design, including:main programe, SJA1000 initialization programe, CAN node sent programe, CAN node receiving programe, button Scanning programe, display programe, node address setting programe, and finish the software debugging. Finally, it debugs and perfects the system, including the PCB board mapping and production, and implementation of hardware and software debugging, debugging problems and solutions, and expansion and improvement of this system. |
