Node Action

Depending on the identifier, the node is affected – or not – by the LIN response. Consequently, after sending or receiving the identifier, the USART must be configured. There are three possible configurations:

• PUBLISH: the node sends the response.
• SUBSCRIBE: the node receives the response.
• IGNORE: the node is not concerned by the response, it does not send and does not receive the response.

This configuration is made by the field Node Action (NACT) in the US_LINMR (see USART LIN Mode Register).

Example: a LIN cluster that contains a master and two slaves:

• Data transfer from the master to the slave1 and to the slave2:

NACT(master)=PUBLISH

NACT(slave1)=SUBSCRIBE

NACT(slave2)=SUBSCRIBE

• Data transfer from the master to the slave1 only:

NACT(master)=PUBLISH

NACT(slave1)=SUBSCRIBE

NACT(slave2)=IGNORE

• Data transfer from the slave1 to the master:

NACT(master)=SUBSCRIBE

NACT(slave1)=PUBLISH

NACT(slave2)=IGNORE

• Data transfer from the slave1 to the slave2:

NACT(master)=IGNORE

NACT(slave1)=PUBLISH

NACT(slave2)=SUBSCRIBE

• Data transfer from the slave2 to the master and to the slave1:

NACT(master)=SUBSCRIBE

NACT(slave1)=SUBSCRIBE

NACT(slave2)=PUBLISH