what is can and how does the protocol work?

Question

Accepted Answer

CAN is a protocol used for communication between electronic devices in vehicles.

CAN stands for Controller Area Network.
It is a serial communication protocol that allows multiple electronic control units (ECUs) to communicate with each other.
CAN uses a two-wire bus system, consisting of a CAN High (CANH) and a CAN Low (CANL) wire.
It employs a message-based communication scheme, where each message is identified by a unique identifier (ID).
CAN supports both standard and extended frames, with standard frames having an 11-bit ID and extended frames having a 29-bit ID.
The protocol uses a bit-wise arbitration mechanism to determine which message has priority when multiple ECUs attempt to transmit simultaneously.
CAN supports error detection and error handling mechanisms to ensure reliable communication.
It is widely used in automotive applications for various tasks such as engine control, transmission control, and body electronics.
Example: In a car, the engine control unit (ECU) can send a CAN message to the transmission control unit (TCU) to change gears.

Accepted Answer

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