LIN Error - Slave Not Responding for S12ZVL32

[chaitanya_kalyani]

Hello,

I am using LIN communication with S12ZVL32 microcontroller and my device is a slave.

When the slave is in sleep mode and master request data then first time getting Error - Slave Not Responding.

From next time getting the output.

This is the output of the sample project and my project also getting the same issue.

First time working with LIN and don't know why getting this error.

Thank you in advance.

[danielmartynek]

Hello [email protected],

If I understand, the S12ZVL32 MCU is a slave device here.

The LIN PHY can detect a wake-up event on the bus and forward it to the SCI module.

But MCU needs some time to leave the stop mode and if the wake up event is an valid frame, it might not be processed by the slave.

Please take a look at the LIN specification rev.2.2A (Section 2.6.2 WAKE UP)

https://assets.vector.com/cms/content/know-how/lin/LIN-Spec_2.2_Rev_A.PDF 

BR, Daniel