Systems and methods for transmitting messages in controller area network

Abstract

An integrated circuit includes Controller Area Network (CAN) circuitry, and identifier (ID) filter circuitry coupled to the CAN circuitry and a CAN bus. The ID filter circuitry is configured to determine if a CAN message selected for transmission by the CAN circuitry should be blocked based on an ID of the selected CAN message. In response to determining that the selected message should not be blocked, the CAN circuitry broadcasts the selected message to all CAN nodes coupled to the CAN bus. In response to determining that the selected message should be blocked, the selected message is not transmitted to the CAN bus.

Description

technical field [0001] The present disclosure relates generally to transmitting messages in a controller area network, and more specifically, to authenticating identifiers in messages transmitted in a controller area network. Background technique [0002] The International Organization for Standardization (ISO) Controller Area Network (CAN) bus is a multi-master message broadcast system that broadcasts short messages containing a limited amount of data, such as temperature or RPM, onto the CAN bus and are commonly used in devices such as cars, trucks, motorcycles, snowmobile trains, buses, airplanes, agriculture, construction, mining, industrial equipment, and ships. Broadcasting provides data sent to more than one location and consistency in each node of the network. In contrast, traditional networks such as USB or Ethernet send large chunks of data point-to-point from node A to node B under the supervision of a central bus master. [0003] In the current CAN implementati...

AI Technical Summary

Problems solved by technology

Therefore, the lack of protection / checking of transmitted message identifiers may be a flaw in the operation of CAN networks, especially those controlling critical electronic systems

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