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CAN-LonWorks protocol converter capable of programming conversion logic and CAN-LonWorks protocol conversion method

A protocol converter and protocol conversion technology, which is applied in the field of CAN-LonWorks protocol converters, can solve the problems that the conversion logic does not support modification, does not consider the variety of application layer protocols, and does not pay attention to the logical relationship between the two protocols. wide effect

Active Publication Date: 2017-08-04
NINGBO CRRC TIMES TRANSDUCER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing protocol converters focus on the conversion of the two underlying protocols of the bus, and only convert the CAN protocol and the LonTalk protocol, without considering the variety and variety of the application layer protocols, and not paying attention to the connection between the two protocols. Complex logical relationship, that is, the complex logical relationship between the format of the LonTalk protocol (message type, data, etc.) and the format of the CAN protocol (frame type, frame format, identifier, data, etc.) is not converted, it can be considered completed It is only a transparent transmission between LonTalk protocol and CAN protocol, and its conversion logic does not support modification

Method used

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  • CAN-LonWorks protocol converter capable of programming conversion logic and CAN-LonWorks protocol conversion method
  • CAN-LonWorks protocol converter capable of programming conversion logic and CAN-LonWorks protocol conversion method
  • CAN-LonWorks protocol converter capable of programming conversion logic and CAN-LonWorks protocol conversion method

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Such as figure 1 As shown, the CAN-LonWorks protocol converter of programmable conversion logic in this embodiment includes CAN interface circuit 1, MCU2, neuron chip 3, LonWorks interface circuit 4, external flash memory 5, power supply 6, EEPROM7 and upper position machine system8.

[0037] Among them, a CAN controller is integrated on the MCU2 to complete the processing of CAN data.

[0038] Both the MCU2 and the neuron chip 3 are connected to an external flash memory 5 . The MCU2 communicates with the external flash memory 5 to read and write data through I2C, SPI or SCI communication. The neuron chip 3 communicates with the external memory Flash through I2C, SPI or SCI communication to read and write data.

[0039] The CAN interface circuit 1 is respectively connected to the CAN bus and the MCU2 for communication. The CAN inter...

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Abstract

The invention relates to a CAN-LonWorks protocol converter capable of programming conversion logic. The CAN-LonWorks protocol converter comprises a CAN interface circuit, an MCU, a neuron chip and a LonWorks interface circuit which are connected in sequence; external flash memories which are connected with the MCU and the neuron chip; a power supply which supplies power to the MCU and the neuron chip; an EEPROM which is connected with the neuron chip; and an upper computer system connected with the MCU. A CAN controller is integrated on the MCU and is used for processing CAN data. Each of the MCU and the neuron chip is connected with one external flash memory. An upper computer can display CAN bus data and LonWorks bus data and can program the conversion logic. A user realizes CAN-LonWorks protocol conversion by programming CAN to LonWorks conversion logic, so application ranges of a CAN bus and a LonWorks bus are wide.

Description

technical field [0001] The invention relates to a CAN-LonWorks protocol converter with programmable conversion logic, and also relates to a CAN-LonWorks protocol conversion method. Background technique [0002] CAN is an ISO international standardized serial communication protocol. CAN bus is widely used in the fields of automobile and industrial measurement and control because of its good anti-interference and low cost. The CAN bus protocol provides the OSI reference model three-layer protocol (physical layer, data link layer and application layer), and defines the physical layer and data link layer. The application layer protocol is defined according to the application object. The data frame format of the CAN protocol is as follows: figure 1 , including 7 parts: Start of Frame, Arbitration Field, Control Field, Data Field, CRC Field, ACK Field, Frame End of Frame. Among them, the frame start, CRC field, response field, and frame end are automatically completed by the CA...

Claims

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Application Information

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IPC IPC(8): H04L29/06
CPCH04L69/08
Inventor 杨玉钊王飞郑良广周峰包演生
Owner NINGBO CRRC TIMES TRANSDUCER TECH CO LTD
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