Lin Stack - How to check for Wakeup request for Master on UART

[vikasmalik22]

Hi,

I would like to know which flag or status, I can use in Lin Stack using UART to check when the UART isr is called on Master if there is a wakeup request or not.

Is there any API or flag to check this?

Thanks & Regards,

Vikas

[kerryzhou]

Hi Vikas Malik ,

  Sleep mode wake up recovery method is interrupt.

  So, if you want to know the wake up, you can change a flag status in the ISR, then in the normal run code, you just need to check the flag in the ISR status, when the interrupt happens, the wakeup will happen.

  I think you can define a flag by yourself, then use it.

Wish it helps you!

Have a great day,
Kerry

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[vikasmalik22]

Hi Kerry,

Thanks for your reply. I will try that out. 

Cheers,

Vikas

[kerryzhou]

HI Vikas Malik

  You are welcome!

   After you test it, if you still have question about it, please kindly let me know.

Wish it helps you!

Have a great day,
Kerry

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[vikasmalik22]

The problem I am having is once the Master goes to sleep state conf->word_status.bit.gotosleep is set to 1.

But once I read the status of this bit using l_ifc_read_status() where it clears the status as below.

*((l_u16*)(conf->word_status)) = 0; and then it doesn't get updated when the wakeup calls or UART_ISR is being triggered.