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How do I set correct stdID for CAN-BUS?

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Mr4
Associate III

‎2024-02-22 12:35 AM - last edited on ‎2024-02-22 01:07 AM by

Hi! I've seen some tutorials on can communication and notice that each of them use different StdId's. I'm using two nucle-l433rc-p boards, do I need a specific StdId or will any number between  0 and 0x7FF suffice?

 

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SofLit
ST Employee

‎2024-02-22 01:03 AM - edited ‎2024-02-23 08:25 AM

Hello,

Standard ID is a 11bit field so the range is 0x0 - 0x7FF

For the Extended ID the field is 29-bit length. The range: 0x0 - 0x1FFF FFFF

Note that the ID is not the address of the node like I2C but any node could have many ID's. Each ID is specific to a function in the node.

The important thing: you need a unique ID on a bus for each function.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
PS: This is NOT an online support (https://ols.st.com) but a collaborative space. So please be polite in your reply. Otherwise, it will be reported as inappropriate and you will be permanently blacklisted from my help/support.

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SofLit
ST Employee

‎2024-02-22 01:03 AM - edited ‎2024-02-23 08:25 AM

Hello,

Standard ID is a 11bit field so the range is 0x0 - 0x7FF

For the Extended ID the field is 29-bit length. The range: 0x0 - 0x1FFF FFFF

Note that the ID is not the address of the node like I2C but any node could have many ID's. Each ID is specific to a function in the node.

The important thing: you need a unique ID on a bus for each function.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
PS: This is NOT an online support (https://ols.st.com) but a collaborative space. So please be polite in your reply. Otherwise, it will be reported as inappropriate and you will be permanently blacklisted from my help/support.
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