ISA intelligent adapter with optical fiber CAN interface

A technology of CAN controller and adapter, which is applied in the field of ISA intelligent adapter, can solve the problems such as the fiber optic interface CAN adapter has not been reported, and achieve the effect of convenient physical connection mode and data transmission state, lightening burden, and good human-computer interaction interface

Inactive Publication Date: 2004-11-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] At present, there have been some research results on CAN communication adapters, such as parallel port CAN adapters, serial port CAN adapters, PC bus CAN adapters, etc., but fiber optic interface CAN adapters have not been reported.

Method used

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  • ISA intelligent adapter with optical fiber CAN interface
  • ISA intelligent adapter with optical fiber CAN interface
  • ISA intelligent adapter with optical fiber CAN interface

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the following embodiments should not be construed as limiting the present invention.

[0020] Such as figure 1 Shown principle block diagram of the present invention, it has the CAN bus network interface that communicates with other nodes, it has an embedded microprocessor, and this embedded microprocessor can exchange data by dual-port RAM and PC. PC access to dual-port RAM is a memory way. The reset scheme can realize power-on reset, button reset and reset using the RESET signal of the ISA bus.

[0021] Such as figure 2 As shown, the twisted pairs used by the CAN bus are called CANH and CANL respectively. PCA82C250 is the interface chip between the CAN controller and the twisted pair. It is a dedicated CAN transceiver that provides differential sending and receiving functions for the bus. It completes the conversion between differential signals...

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Abstract

The invention relates to an ISA intelligent adapter with optical-fiber CAN interface, including embedded microprocessor, CAN controller and CAN bus network interface, where the embedded microprocessor is connected with PC and also connected with CAN bus network interface by CAN controller, and the CAN bus network interface is also connected with CAN bus; its character: the embedded microprocessor and PC are connected in ISA bus mode. It combines CAN bus technique with PC technique, to build up a CAN bus system. It provides a good man-machine interactive interface, convenient for study of the protocol and network construction mode of a CAN bus.

Description

technical field [0001] The invention belongs to an interface device between an optical fiber CAN bus network and a PC, in particular to an ISA intelligent adapter with an optical fiber CAN interface. Background technique [0002] CAN (Controller Local Area Network) bus can be used for equipment monitoring and control. It has a simple structure, flexible system, and uses non-destructive bus arbitration technology to deal with node conflicts. It is a promising field bus. Its transmission medium can be twisted pair or optical fiber. Twisted-pair CAN networking is technically easy to implement, low in cost, and has a certain ability to suppress environmental electromagnetic radiation. Optical fiber CAN networking is difficult, but it has a strong ability to resist EMI. The transmission medium can be selected according to the actual situation. [0003] As the interface device between the CAN node and the PC, the CAN communication adapter has the function...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/02H04L12/40H04L29/02
Inventor 曾春年程昌银梁红秦神祖吴友宇
Owner WUHAN UNIV OF TECH
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