S32KのトピックRe: S32K Lin sleep/wake-up

S32K Lin sleep/wake-up

veronica — Fri, 28 Jun 2019 13:58:47 GMT

Hello,

We are using a S32K board as a LIN master and are having some trouble with the go_to_sleep and wake-up messages. Firstly, when the go to sleep command is issued ( we are using l_ifc_goto_sleep() function from provided SDK), the master LIN node doesn't actually go into LIN_NODE_STATE_SLEEP_MODE as it should. The lin_update_tx service does get triggered, but puts the node directly into IDLE state, instead of sleep. For the sake of testing, I have manually called the set low power mode function; when a slave issues a wake-up call, the interrupt gets triggered on the master, but the node remains in SLEEP state. It seems that while the LIN_LPUART_DRV_CheckWakeupSignal() function is reached, because when the LIN master is in sleep state/low power the polarity of the receive data is false, the actual check if the received signal is a wake-up does not get performed. The LIN slaves in this configuration are from the S12 MagniV microcontrollers family.

Kind regards,

Veronica

Re: S32K Lin sleep/wake-up

dianabatrlova — Tue, 16 Jul 2019 11:23:47 GMT

Hello Veronica,

I have contacted our LinStack experts and it is an issue in LinDriver.

Please add this code:

if (linCurrentState->currentNodeState != LIN_NODE_STATE_SLEEP_MODE)

{

(void)LIN_LPUART_DRV_GotoIdleState(instance);

}

In the line 1944 of file lin_lpuart_driver.c (please see attached file for more information, we have updated this file)

Because of missing these line, the master node will not go to SLEEP_MODE right after sending sleep command but it still goto sleep after(4-10s).

Regarding a wake-up signal. After the master goes to SLEEP_MODE, the master node can receive the wake-up signal normally. We do not see any error here.

I hope it helps.

Best Regards,

Diana

Re: S32K Lin sleep/wake-up

veronica — Tue, 16 Jul 2019 11:30:45 GMT

Hello Diana!

Thank you for your answer! I will try the suggested fix and post here if I see anymore problems.

Kind regards,

Veronica