Canopen main control device and control method based on pc104 bus

Abstract

The present invention provides a kind of CANOPEN main control equipment and control method based on PC104 bus, this equipment comprises PC104 single-board computer, CANOPEN main station communication card and power board, PC104 single-board computer is connected with CANOPEN main station communication card through PC104 bus; CANOPEN The master station communication card includes a CANOPEN protocol controller and a PC104 bus interface circuit formed by a logic gate circuit, an address converter, a latch, and a register; the input end of the PC104 bus interface circuit is connected to the PC104 bus, and the output ends are respectively connected to the address converter, Latch, buffer and CANOPEN protocol controller; the input end of the power board is connected to an external power supply, and the output end is respectively connected to a PC104 single-board computer and a CANOPEN master station communication card. By expanding a general-purpose CANOPEN master communication card with PC104 bus interface on the PC104 single-board computer, the control sequence of the CANOPEN protocol controller is completely completed by logic gate circuits, without the participation of programmable devices, which is convenient for update and maintenance.

Description

technical field [0001] The invention relates to the network control device technology of rolling stock based on CANOPEN network technology, in particular to a CANOPEN main control device and control method based on PC104 bus. Background technique [0002] Due to the advantages of reliability, real-time, low cost, anti-interference, compatibility and other aspects, CAN-bus (CAN-BUS is CAN bus technology, the full name is "Controller Area Network-BUS technology Controller Area Network-BUS", The Can-Bus bus technology was first used in the communication of aircraft, tanks and other weapon electronic systems. The use of this technology in civilian vehicles originated in Europe. In the car, this bus network is used for the communication of various sensor data on the car. Pass.) and its high-level protocol CANOPEN (a high-level communication protocol based on the control local area network "Control Area Network, or CAN", including communication sub-protocols and device sub-protoco...

AI Technical Summary

Problems solved by technology

[0004] The existing CANOPEN master control equipment generally adopts a processor with its own CAN protocol controller or a processor that completes the timing conversion of an external CAN protocol controller by a programmable logic device; the processor with its own CAN protocol controller has insufficient processing capacity. It is difficult to exceed 100MIPS, and peripheral resources such as RAM and flash are limited; the processor that completes the timing conversion of the external CAN protocol controller by the programmable logic device updates the program of the programmable logic device to meet the read / write cycle of the CAN protocol controller Timing, two programs of the processor and the programmable logic device need to be updated, and the maintainability is not strong

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