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CAN bus gateway controller and data transmission method between CAN buses

A data transmission method and CAN bus technology, applied in the field of CAN bus data exchange control, can solve the problems of unable to monitor CAN bus communication status in real time, unable to store CAN node communication records, data loss, etc., to facilitate fault detection and data analysis, Achieve qualified detection and prevent data packet loss

Inactive Publication Date: 2009-02-04
BYD CO LTD
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Problems solved by technology

In this way, although the inter-bus communication function is realized, the function is simple. If the bus receiving data is occupied by other nodes during the forwarding process, the data may be lost, and the communication status of each node on the CAN bus cannot be monitored in real time, and each CAN node cannot be stored. communication records

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  • CAN bus gateway controller and data transmission method between CAN buses
  • CAN bus gateway controller and data transmission method between CAN buses
  • CAN bus gateway controller and data transmission method between CAN buses

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Embodiment Construction

[0021] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, the CAN bus gateway controller in this example includes a microcontroller, a first CAN transceiver, a second CAN transceiver, a data storage module, and the like.

[0023] The schematic diagram of the circuit part is as figure 2 and image 3 As shown, the circuit structures of the first CAN transceiver and the second CAN transceiver are the same, including a CAN transceiver module, two optocoupler isolation modules, and a common mode filter. The external power supply, such as the 12V DC power supply on the car, is converted to 5V through the power regulator U1, and then converted to 3.3V and 1.8V through the voltage regulator U2 and U4 to supply power to the microcontroller, optocoupler, memory, etc. U6 is a microcontroller, and U16 is a data storage module, which adopts the EEPROM memory ...

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Abstract

The invention discloses a CAN bus gateway controller and a data transmission method of CAN buses, and the gateway controller comprises a first CAN transceiver, a second CAN transceiver, a microcontroller and a data storage module, and the first CAN transceiver, the second CAN transceiver and the data storage module are respectively connected with the microcontroller. The method can effectively prevent the condition of data packet loss caused by inconsistent protocol and velocity of two CAN buses and improve the reliability of data transmission through the forwarding control and arrangement of data buffering; meanwhile, communication status diagnosis results of each node can be sent out periodically, then each node on the CAN buses can know the network status of other nodes, and the real-time monitoring is simple, so as to favor the development of network communications and facilitate the fault detection and data analysis. The CAN bus gateway controller only need two identical CAN transceivers, the hardware configuration is simple, the compatibility problem does not exist, and the reliability is higher.

Description

【Technical field】 [0001] The invention relates to a communication control technology, in particular to the field of CAN bus data exchange control. 【Background technique】 [0002] Controller Area Network CAN (Controller Area Network) is a communication protocol developed by Bosch Company in Germany to solve the data exchange between numerous control and test instruments in modern automobiles. According to the ISO standard, the topology of CAN is bus type, so it is also called CAN bus. CAN bus is a multi-master bus. The communication medium can be twisted pair, coaxial cable or optical fiber, and the communication rate can reach 1Mb / s. , CAN bus has a unique structure and reliable performance. It is considered to be one of the most promising field control buses, and it has been widely used in the automotive industry. Compared with the traditional point-to-point communication between parts and components, the car using CAN bus has the following advantages: greatly reducing the...

Claims

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Application Information

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IPC IPC(8): H04L12/40B60R16/02H04L12/56
Inventor 袁绪宋敬育苏聃
Owner BYD CO LTD
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