What are the advantages of the CAN bus:
Abolish the traditional station address code and replace it with the communication data block, which can work in multi-master mode;
Non-destructive arbitration technology, when two nodes transmit data to the network at the same time, the node with lower priority actively stops data transmission, and the node with higher priority can continue to transmit data without affecting, effectively avoiding bus conflict;
With short frame structure, the number of valid bytes per frame is 8, the data transmission time is short, the probability of interference is low, and the time of retransmission is short;
Each frame of data has CRC checksum and other error detection measures to ensure high reliability of data transmission and is suitable for use in high interference environments;
In the case of a serious error, the node has the function of automatically closing the bus, cutting off its connection with the bus, so that other operations on the bus are not affected;
Data can be transmitted and received in a point-to-point, one-to-many, and broadcast-intensive manner.
It has the advantages of strong real-time performance, long transmission distance, strong anti-electromagnetic interference capability and low cost;
The two-wire serial communication method has strong error detection capability and can work in a high noise interference environment;
With priority and arbitration function, multiple control modules are connected to the CAN-Bus through the CAN controller to form a multi-host local network;
The message may be received or blocked according to the ID of the message;
Reliable error handling and error detection mechanisms;
After the sent information is destroyed, it can be automatically resent;
The node has the function of automatically exiting the bus in case of serious error;
The message does not contain the source address or the destination address, and only the identifier is used to indicate the function information and the priority information.
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