topic Re: LIN Wakeup and Timeout in S32K

LIN Wakeup and Timeout

pchavapr4 — Wed, 16 Jul 2025 09:35:30 GMT

Hello
I am using S32k310 with LIN_STACK_2.0.5_D2410_DesignStudio_updatesite and RTD_R21-11_5.0.0_D2410_DesignStudio_updatesite.
1) I am facing issue when master node send Wake up command, Slave node detect Linnode state as wake up signal but I need to call Lin_43_LPUART_FLEXIO_Wakeup function when LPUART_LIN_IP_RX_ACTIVE_EDGE_DETECT. Could you please describe how LIN Wakeup functionality handle in Lin Stack?
2) I want to know more details about LIN Timeout. How LIN Bus will wake up after LIN goes in Sleep mode after timeout?

Re: LIN Wakeup and Timeout

danielmartynek — Sun, 20 Jul 2025 19:55:15 GMT

Hello @pchavapr4,

I just tested it on the S32K1xx series which I happen to have on bench, my test project can be found here:

https://community.nxp.com/t5/S32K-Knowledge-Base/S32K144-LIN-Go-to-Sleep/ta-p/2136890

It is the same on the S32K310.

You can check these functions:

Lpuart_Lin_Ip_IRQHandlerWhenInitializedExceptBreakIRQ()

Lpuart_Lin_Ip_ProcessWakeupDetect()

Lpuart_Lin_Ip_CheckWakeupSignal().

BR, Daniel