Implementation method of CANopen master station based on DSP 28335

Abstract

The invention discloses an implementation method of a CANopen master station based on DSP 28335. The CANopen master station comprises a CanOpen protocol slave stack system, a state machine module, a CAN communication management module, an object dictionary management module, a network management module, a timer management module and a communication object management module. The implementation method of the CANopen master station based on the DSP 28335 has the advantages that the method that a DSP 28335 platform is configured to be the perfectly functional CANopen master station through simple configuration is adopted, and the targeted optimization CANopen slave node function is achieved on the DSP 28335 platform and can be ported to a CPU of the same series through simple modification; writing of the standard C programming language has good porting performance; codes can be reduced, the occupied system resource is small, and instantaneity is high. Standard C programming language writing highly fits other user programs so that seamless link and imbedding among the programs can be achieved, applicability is high, development cost is low, maintenance and function extension are convenient, and miniaturization of products is facilitated.

Description

technical field [0001] The invention relates to the field of microprocessor application technology; in particular, it relates to a DSP28335-based CANopen master station implementation method. Background technique [0002] CANopen is a high-level application protocol based on the CAN-bus specification. It was jointly developed by manufacturers and users in conjunction with CiA, and became the CENELEC EN 50325-4 standard in 2002. At the same time, CANopen is also a sub-protocol series, and its basic communication mechanism is described in the communication sub-protocol (Communication Profile). CANopen has established standards in a large number of industrial communication fields to realize industrial communication based on CAN-bus distributed automation control equipment. Under each CANopen node, it not only allows messages to be transmitted by broadcasting, but also sends and receives data in a point-to-point manner. The development of projects is simplified in the CANopen ...

AI Technical Summary

Problems solved by technology

Since it takes a certain amount of time for the system data to be transmitted from the system CPU to the module and the internal processing of the module, the response speed of the node will be slowed down accordingly. Since the CAN bus communication speed reaches 1M / S, the general internal serial bus cannot reach the corresponding speed. As a result, it becomes a speed bottleneck and affects the information exchange rate of the entire CANopen network

Most functional modules have a single function and cannot be flexibly configured. Adding new functions can only rely on the corresponding manufacturer to develop new models, and the installation space needs to be considered separately in the product design. The cost of each module is high, which is not conducive to the miniaturization and scale of the product.

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