The CAN communication-CodePudding

I was wondering if the can communication data in priority, can compare priority order to determine the size of the data sent?

CodePudding user response:

A great question to ask

CodePudding user response:

Can deal not mounted on it equipment allocation priority, possession of the bus is determined by the importance of information, for important information will give it a high priority packaging ID, ID decided to send a data frame of priority

CodePudding user response:

refer to the second floor AMAZING_A1 response:

can deal not mounted on it equipment allocation priority, possession of the bus is determined by the importance of information, for important information will give it a high priority packaging ID, ID decided to send a data frame priority

You mean by packaging a priority ID is refers to a static process of equivalent is the transfer of this information is certain, but we can set his priorities, also is a section in the ID according to priority, we can set a few bigger, priority in order to achieve an effect of important emergency information, understand it, right?

CodePudding user response:

refer to the second floor AMAZING_A1 response:

can deal not mounted on it equipment allocation priority, possession of the bus is determined by the importance of information, for important information will give it a high priority packaging ID, ID decided to send a data frame priority

I said ID is also like this (or right) wrong information is also a static set good, just said at the start of setting error messages in what has confirmed his ID, like ECU to determine the transmission speed, factory has been set to you from the start

CodePudding user response:

reference 3 floor @ the reply of coke with ice:

Quote: refer to the second floor AMAZING_A1 response:
can deal not mounted on it equipment allocation priority, possession of the bus is determined by the importance of information, for important information will give it a high priority packaging ID, ID decided to send a data frame priority

You mean by packaging a priority ID is refers to a static process of equivalent is the transfer of this information is certain, but we can set his priorities, also is a section in the ID according to priority, we can set a few bigger, priority in order to achieve an effect of important emergency information, understand it, right?

So to understand, it is recommended that the introduction to look at the can bus

CodePudding user response:

Data is the frame as the carrier of message, mainly depends on the newspaper article canid, id is smaller, the higher the priority,
As for the newspaper article data, there is so little sense of priority, can be placed in data0

CodePudding user response:

Priority of judgment is the controller automatically, do not need to intervene,
Controller based on CAN ID to determine priorities, the smaller the ID, the higher the priority