Data transmission method and device based on can bus

Abstract

The present invention provides a CAN bus-based data transmission method and device, the method comprising: combining the valid data carried in the nth data packet to be sent to the n+mth data packet to be sent to obtain the combined data; wherein , n and m are positive integers greater than zero; the merged data is checked to obtain check data; the check data is divided into m+1 pieces of sub-check data, and each block of sub-check data They are respectively carried in different data packets to be sent and sent to the receiving end through the CAN bus. The CAN bus-based data transmission method and device provided by the present invention can increase the amount of effective data that can be carried in each frame of data, thereby improving the utilization rate of data bandwidth.

Description

technical field

[0001] The invention relates to communication technology, in particular to a CAN bus-based data transmission method and device. Background technique

[0002] The controller area network (CAN) bus is a bus system widely used in the automotive field. Compared with the RS-485 distributed control system based on the R line, the network nodes of the distributed control system based on the CAN bus The real-time data communication among them is strong, and the development cycle is short.

[0003] Figure 1a It is a schematic diagram of data transmission in the prior art, Figure 1b It is a schematic diagram of transmitting verification data in the prior art. like Figure 1a As shown, the data field of each frame of the CAN bus is up to 8 bytes. In the case of no data verification, the 8 byte data fields are all used to transmit valid data. like Figure 1b As shown, in the occasion where there is a requirement for data transmission security, the verification data...

Examples

Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] The terms "first", "second", "third" and "fourth" (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects without necessarily using Used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those ...

technical field

[0001] The invention relates to communication technology, in particular to a CAN bus-based data transmission method and device. Background technique

[0002] The controller area network (CAN) bus is a bus system widely used in the automotive field. Compared with the RS-485 distributed control system based on the R line, the network nodes of the distributed control system based on the CAN bus The real-time data communication among them is strong, and the development cycle is short.

[0003] Figure 1a It is a schematic diagram of data transmission in the prior art, Figure 1b It is a schematic diagram of transmitting verification data in the prior art. like Figure 1a As shown, the data field of each frame of the CAN bus is up to 8 bytes. In the case of no data verification, the 8 byte data fields are all used to transmit valid data. like Figure 1b As shown, in the occasion where there is a requirement for data transmission security, the verification data...

Examples

Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] The terms "first", "second", "third" and "fourth" (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects without necessarily using Used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those ...

Images