topic wake up k70 from VLPS deep sleep by GPIO interrupt in Kinetis Microcontrollers

wake up k70 from VLPS deep sleep by GPIO interrupt

minli — Mon, 01 May 2017 22:00:10 GMT

I can not wake up k70 (Kinetis) from VLPS deep sleep by GPIO interrupt.

This is under uCLinux, where I enabled CONFIG_PM. After that, I can put K70 to deep sleep by "echo mem > /sys/power/state" and wake it up from UART debug console. But I can not wake up by triggering GPIO interrupt. I have confirmed that the interrupt works before and after the sleep by printing from the interrupt handler and I have also confirmed the GPIO pin value changes from 0 to 1 during sleep after I triggered the GPIO interrupt.

According to the K70 manual, I should be able to wake up VLPS by a GPIO interrupt. Does any have any insight why I could not?

Thanks

Re: wake up k70 from VLPS deep sleep by GPIO interrupt

kerryzhou — Tue, 09 May 2017 08:16:10 GMT

Hi Min Li,

Please also post some code of entering VLPS mode, and the GPIO interrupt code on your side.

I will help you to check it.

If your K70 really enter VLPS mode, the GPIO must can wakeup it.

Have a great day,
Kerry

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