USB not working putting the CPU in low power

Posted on October 16, 2015 at 13:39

Hi all I've been using the STM32F429 discovery board since a long time with optimal results

I've been using USB HID device profile successfully for long time.

Now I'm trying to put CPU in low power mode (the first type: simply calling __WFI)

Doing so the PC gives me the message ''USB device not recognized''.

Any idea? In this mode all the interrupts wake up the CPU therefore USB should continue working...

Thanks and regards

Damiano

#usb #low-power

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