Method for electronic control unit for expanding single CAN bus module into double CAN

Abstract

The present invention discloses an electronic control unit method is used in industrial site control with requirement for CAN bus,in particulr is applicable to car site control having CAN bridge requirement and capable of expanding single CAN bus modules into double CAN. Said method is characterized by that the data bus, address bus and control buss of Motorola 68MC376 chip microprocessor and Intel 82527 CAN controller chip are correspondently connected, two groups of CAN signals are connected into CAN transceiver by means of photoelectric isolation to implement exterior connection of CAN bus, then the software and hardware configuration can be used to map Intel 82527 CAN into the addressing space of motorola 68 MC 376 chip microprocessor so as to implement expansion of CAN module based on Motorola 68 MC 376.

Description

technical field [0001] The invention belongs to the technical field of electronic control, and in particular relates to an electronic control that expands a single CAN bus module into a dual CAN for industrial site control that requires a CAN bus, and is especially suitable for vehicle site control that requires a CAN bridge. unit method. Background technique [0002] Controller Area Bus (CAN) is a bus technology widely used in modern industrial field control. In some industrial applications, it is common for an electronic control unit (ECU) to work in two CAN networks at the same time. In this case, the ECU acts as a bridge between the master controller and the CAN network. [0003] Among the currently commonly used low-end CAN network controllers, 51 series single-chip microcomputers are generally used to design CAN modules with SJA1000. Since the 51 single-chip microcomputer does not have advantages in computing power and peripheral modules, this design cannot meet the...

AI Technical Summary

Problems solved by technology

Since the 51 single-chip microcomputer does not have advantages in computing power and peripheral modules, this design cannot meet the application requirements of most vehicle controls with high real-time requirements, large data throughput, and large computing requirements.

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